TRUCK NORRIS VS BTR TRUCK CAMS. HOW DOES THE TRUCK NORRIS LS CAM COMPARE TO STAGES 1-4 TRUCK CAMS?
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- เผยแพร่เมื่อ 9 ก.พ. 2022
- DOES THE BTR TRUCK NORRIS CAM MAKE MORE POWER THAN A BTR TORQUE CAM? HOW MUCH LOW SPEED TORQUE DOES THE TRUCK NORRIS CAM MAKE? IS THE TRUCK NORRIS CAM A GOOD TRUCK CAM? DOES THE BTR TRUCK NORRIS CAM MAKE MORE POWER THAN A STAGE 1, 2, 3 OR 4 TRUCK CAM? WHAT IS THE BEST TRUCK CAM FOR MY 4.8L, 5.3L OR 6.0L TRUCK? DOES THE TRUCK NORRIS CAM MAKE GOOD LOW-SPEED TORQUE? CHECK OUT THIS VIDEO WHERE I COMPARED THE BTR TRUCK NORRIS CAM TO THE STOCK 5.3L CAM, THE BTR TORQUE CAM AND THE STAGES 1, 2, 3, 4 TRUCK CAMS. HOW DO THEY ALL COMPARE?
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Richard “just the facts” Holdener - an engineer showing us what the parts really do. Hope you keep doing what you’re doing.
The most straightforward source of any engine data I really need. It’s insane how much he’s had access to in his career
Looks like Truck Norris roundhouse-kicked all the "stage" cams right off the stage. 😉
After seeing what one of these Truck Norris cams actually does in the wild. Where the engine had stock OEM flat top pistons with a TBSS intake and a set of out of the box Summit headers with a full exhaust to the back of the car (1980 Monte Carlo) running a 4l60E trans. I was very happy with the performance and even the fuel mileage that this performance cam provided. And is why we went with the same cam and flattop OEM pistons and 862 heads for our 5.3 LM7 build thats going in our 86 Camaro in the spring. If it makes anywhere near the 400 hp (NA) we will be very happy with what we have. Having a nice street car (with AC) With 400 hp on pump gas thats getting 20 plus MPG is about all you can ask for these days.
What to know when ordering OEM flat tops for a 5.3? I was interested in using flat tops but wasn’t sure which to order
Which is best for my stock 2007 Tahoe to delete the cylinder deactivation and for best mpg and Towing?
Thank you for putting in the work. I truly appreciate all that you do. It helps me with cam decisions. I'm analyzing the trends that you show, and coming up with my own conclusions, pairing it with David Vizard's thoughts. My plans are for my LYQ, L96, and a built-for-torque 408.
Richard, thanks again for the wealth of information. The test you ran is basically my set up. I just got my Gen 4 rods, undecided on stock vs. flat top pistons. Again, thanks for the wealth of information
I've been wondering how the norris would compare to the stage 3 or 4 Btr v2 truck cams now you answered my thoughts
Richard is the man
Seriously, he has been the main source of info for my engine build since I decided to pull it and build my 5.3.
I’ve watched just about every video including “the other guys” episodes as they Will come in handy for my future boat engine build.
Stay awesome Richard!
✍🏿
Hell yeah, can't wait to get mine put together and installed!
Great info Mr Holdner!
I agree with you that if you have already done a cam swap that it's probably not enough difference to make a difference between the cams to justify the cost and effort to change it. But if you have a stock cam and want to get the best upgrade cam I think the the truck Norris cam is definitely the one to get. Thank you great video. Just to let you know. Your videos are awesome I have learned a lot and there's things I was thinking about that were wrong and others I had a pretty good understanding of and your videos have shown me with dyno data where I was right and wrong and why.
Love what this channel does. Also really appreciate the dyno charts that go all the way down to 2k rpm. Lotta times that's where I'm rolling into it on the street. Particularly when I don't want to sound too conspicuous. I'm pulling from 2k to 4k a lot more often than 4k to 6k. A cam like the Truck Norris seems ideal.
I really appreciate all the info you give us in your videos! Thank you so much!
Nice! I wanted a tight LSA truck cam for so long, very happy with the results!
Good job Richard may seem like repetive to you but theesecomparisons are great I love what you do you are a legend
Man you’re such a blessing to have on this earth! Going to order the BTR Truck Norris cam for my 4x4 05 Silverado
I love this cam!! sounds awesome, pulls great, and I getting a peppy truck on 35s now
The BEST AUTOMOTIVE CHANNEL ON TH-cam...
Great stuff, Richard! This is the one I've been waiting to see! Thanks!!👍👍
Thank you for all your hard work Richard! Thinking about using one of these in my autocross build
Thank you Richard! My kind of content!
BTR makes some excellent products no doubt. Would really love to see some pulls with some of the truck offerings from Cam Motion.
They are good people.
Steve is good people at Cam Motion
Gotta love a tight lsa camshaft. I remember when Holden introduced the LS1 into the Australian market that people weren't impressed with the lack of low end torque. Considering the base model Holden Commodore sedan 2001 could be purchased with the 5.7 300 hp LS1 compared to the previous Holden 5.0 240 hp.
And I thought the ls1 had all the low end torque
Truck Norris out-torques the Torq cam down low and out-powers the Stage 3 Truck cam up top. And the way that it carries peak power to 6500 rpm is amazing. Brian Tooley won't be able to keep them in stock.
I just received my stage 2 truck norris for my 5.3 cannot wait to see the results.
So I'm new to the game and just got me a 01 chevy silverado with a 5.3 with 706 heads and these videos help me alot into what to upgrade.. Thanks alot
Glad to help
Thank You Richard, Awesome Content Brother, Would Love to See your Take on Match for Lifter Quality, with So many Counterfeits out there, The Extra $$$ to get Bowtie Caddy, Morel or Johnson Lifters just seems appropriate Thanks
NOW we need to see VVT cams vs TRUCK NORRIS on LS engines!!
Awesome Richard!!… you have given answers from the Truck Gods
Ask, and it shall be given you; seek, and ye
shall find..
For everyone who asks receives
Thxs been waiting to see this video since I heard about truck Norris we tried the stage 2 in a 6.0 it sounded great and definitely had a good bit more on the top side but it wasn’t what we was looking for because it was in a raised 4x4
Stall helped but was not what we wanted having to lay into it to get the power even on the smaller holes
But we’ll be starting from fresh again for another truck and we’re definitely going with the truck Norris thxs
You had to rev the stage 2 truck cam to get it going ?
My next upgrade is a camshaft. thanks for the info, this helps
Very well put together presentation. Ty
You are the man...I love how u speak the truth....
so im guessing to maximize the performance of the truck norris cam, a 93 octane tune would be required? Keep up the fantastic work by the way Richard! Keep the data coming!
Wow, the truck Norris cam has a built-in phaser with such a wide power band.
Great info vid Rich Thanks !
I bought a stage 1 truck cam and I'm going to stick with it. Although the truck norris cam is a beast
That was a good mention about the 87 fuel octane tunes.my truck 87 can only handle 17-18 timing at the top safely.e85 the most I've tried 24-26 no nock.8.1 gm injectors at 55psi were not big enough.6.0 243 home ported heads comp 218 springs 560 lift 218 220 114lsa. More information on the tunes would be nice. Either way good video.1 more with 6.0.yes
Mines reading 25.5° of timing on 87
I've just purchased the truck norris cam for my ly6 😎
Brian and his team work very hard. It takes a lot of effort to continue to improve and then go out in a public forum and let your test results be published win lose or draw whatever happen gets shown. Tech moves, gets better but only through hard work. The Truck Norris best cam name ever let’s do a poll. :P
agreed on the name
Right on
I just ordered mine from BTR for my LQ4. It should perform well with the 799 heads.
How did it come out are you happy with it ?
Thank You .... The swiss army cam
Great comparison , wish the truck Norris cam was out/popular last year .
Amazing video as always. Keep it up.
Do a 5.3 build, heads, cam, intake and headers but on 87/89 octane for those of us who have off road daily drivers who need low speed control for rocks and then grunt to pull through sand hills
Love your videos!
I put a 6.0 in a ‘05 Suburban with the BTR Stage1 Truck cam, it can idle and pass CA emissions on the factory 5.3 tune. I just found an idle clip of “Truck Norris”, IMO that would be miserable with the stock tight converter these trucks came with and I don’t think it’s going to be happy at a factory 550rpm idle. In short, drivability of the Stg1 probably better and you can sneak it past the Gestapo every two years. Thanks for another great vid Richard!
Part of the TN is it works great with stock converter. It's made to have a rowdy idle while actually being smooth with the stock converter. Lots of tuning time (correct ve table then adjust maf and timing over and over) gave choppy but emissions worthy idle with good driveability. Tows better than stock too.
(Edited for spelling)
Just ordered a BTR stage 1 for the daily driver aspect and stock deleted tune. Makes 40-50 more HP over stock which is great.
Amazing cam.
I have a stage 2 in my daily and its pretty good. The one thing I want to point out is this is on a stock headed stock intake I'm assuming motor... be curious to see what these numbers would be on. A built 5.3. I am going cam motion titan 2 ls1 cam for my new build. Want to see how it works out. Going with a 3200 stall as well and a good combination on the motor. Can you test some cam motion stuff soon? They could be considered "the other guys"!
Thank you for this
Woo woo! Late night post-live uploads!
You should compare the Truck Norris cam and the bfd chop monster cam. Would be very interested is seeing the differences between the two on the dyno.
Hello, I always watch your videos, and I learn a lot from them. I have a stock 5.3 Lm7 engine and 862 heads with a 68 inlet and 90 outlet turbocharger, with a fitech injection system for 750hp with a 102 throttle. My question is what do you recommend for my configuration? , and also if you know the gap between the rings and the pistons, I understand that it is different when it is turbocharged for street use. Thanks for the help.
What cam do you recommend for my configuration ?
Thanks
Thabk you for this!
Personal Observations Made Comparing The Truck Norris To The Stage 1-4:
TN Had The Tightest LSA Of 107. It Also Has The second Highest Amount Of Overlap (when guessing Exhasut duration is 222)
STG1 Had The Least Amount Of Overlap And Widest LSA 112. It's "RPM HP Hump" Was The Earliest. It Made Less Overall HP And Torque Because LSA Was Was Furthest From Optimal For Engine.
STG 2 Had The Next Shortest Amount Of Overlap And A Slightly Tighter 111 LSA. This Cam Didn't Really Shift The HP Hump From The Stage 1 Further Up In RPM But Rather Widened The Hump. Power Did Increase From STG1 Suspected By The Slight Lift Increase And Tighter LSA Approaching Optimal.
STG 3 Had 3rd Shorted Amount Of Overlap And Again A Slightly Tighter 110 LSA. The Change In Overlap From 2-3 Is Increasing However The HP Hump Isn't Really Shifting Higher Up In The RPMs. The Increases Appear To LSA Approaching Optimal As It Gets Tighter.
STG 4 Had The Most Amount Of Overlap And More Overlap Than The TN Cam. Oddly The LSA Went Up To 111. This Cam didn't Really Shift The Power Much Higher Up The RPM Given More Overlap. It Did However Make More Power Than The TN. The Increased Overlap Seems To Have Traded More Low End To Compensate For Having The LSA Further From Optimal For This Engine Compared To The TN 107LSA. I Think If The STG4 Kept Same Overlap But Ran A 108-9 LSA The Power Gain Would Be More Higher And Less Behind The TN In The Lower RPMs In The Curve.
I'm Starting To See That Overlap Isn't Trading 3-4RPM Power And Shifting The Peak RPM Power Range As High Up As I Think. It Appears To Be Trading Much Lower RPM Power 1500-3000 RPM And Slightly Shifting The RPM It Peaks At While Raising The Peak.
The Duration Bias. The TN Appears To Have The Largest Duration Bias With Much More Duration On The Exhaust. This Appears To Flatten/Carry The Peak Power Further Out. From What I've Read Doing This Does Indeed To Show This True. However It Says It Trades Low End When You Bais The Exhaust For More Duration. This Isn't Really Seen With The TN Cam... However It Is Possible Since The LSA Is More Near Optimal That The STG4 Cam It May Not Show The Trade Since The STG Is Loosing Some Of It From LSA Being Further From Optimal.
These Are Personal Notes.
duration determines rpm
The name is fitting. Gotta respect chuck
Thanks for the video Richard. I'm convinced I need this truck norris cam with a tbss intake, 92mm throttle body. Headers and ported 706 heads with a 2500-3000 stall, should be a stout motor.
The nice part is the cam is set up to be able to be used with a stock converter.
Tbss is easy to swap on real quick. Highly recommended.
@@natricjol this is my plan. I'm ordering the cam next week, then I'll probably get a stall or tbss intake. I'm just going to keep doing it in stages along with gears to top it off.
@@mrcgarage8687 If you get the tbss, also do the throttle (and x-link if needed), new injectors, oil pressure sensor since it's right behind the manifold, and 4 corner steam vent kit. Makes life easier to get all that at once.
@@natricjol good idea man, I will do that forsure
I'm tempted to put one of those Truck Norris cams in my 2500HD plow truck, but I already have wheel traction issues in the deep snow and honestly don't need more power in those moments.
man I just installed a BTR truck cam in my 4.8. I wish I knew this was coming out
Great video < everything I need to know
Just installed my truck Norris cam
What a great video for idiots like me that wonder the same thing but cant test them... thanks richard
Gotta share this to fb truck pages and hopefully gets pinned lol.
I put a stage 2 truck cam in my LQ4 last year. I kinda wish I would have waited for the truck norris, but I'm still happy with the stage 2 truck cam. Cool comparison!
You already have torque in a 6.0 your not missing much since you have the cubic inches not to mention on a cold day that truck norris won’t idle lol
@@utahcountypicazospage5412 wrong, tune will fix the cold idle.
@@onebadbowtie86 stage two truck cam idles way better then truck Norris because of lsa and duration and even the best tunes/tuner will tell ya 107 lsa will still give you issues on a cold morning
@@utahcountypicazospage5412 I know, I just tuned a 5.3 silverado with one, remote starts fine in -15*. you need a tune with any of these cams, might as well get the one that makes the greatest power/torque.
So it seems like exhaust controlls how high the cam revs even with low intake duration lsa is also a big factor seems the trade off would be rough idle for not much power .torque yes but hp seems low for how rough the idle quality is
greetings from Venezuela summit launched an 8728 torquination cam it is called to compete with the Norris truck it would be very good to compare them
I'm building an 04 Lq4. Hopefully it has all the factory goodies and it'll get the truck Norris cam, Ported Head and intake, and heads decked to bring compression to around 10.3 : 1 if I've got valve piston clearance. probably balance the rotating assembly so I can spin close to 7k assuming I got the stronger rods and pistons
it won't make power up at 7000 rpm with that cam on a 6.0L-but it will rev there
@@richardholdener1727 Any suggestions for a cam that would want to be shifted WOT at around 6.5 - 7k that would still make good low-end torque for light towing and street? I'd probably be doing a Holley terminator with a map switch for transmission control for towing to rev higher before shifting. My goal is 400 + torque and HP - Id probably be building custom headers too.
And I'd probably do a HD converter with 2000 - 2200 Stall
I would love to see the compared in a 6.0 truck and which would make more power and torque
After Watching your videos for awhile, my 4.8 crew cabs lifter decided to start ticking at 227k miles. Being i use it as a daily and just wanted more power were it spends all its time at lower rpm I went with the torque cam. 4.8 in a heavy crew cab that I didn't want to change the converter out in the torque cam just seemed like the best fit to make it less anemic 😆. Hoping between the cam, hd2 shift kit while transmission was being built, and went ahead and regeared from 3.23-4.10 and Detroit truetrac that the truck performs better in its roll than beforehand 😎
I have a 2500 4.8 van
Rebuilding the drivetrain now. Would you recommend the cam upgrade and gearing? Would you do anything differently?
Getting ready to do my first build thank you for all your videos I did subscribe any tips would be appreciated thank again
WELCOME
I'd be really interested in how these cams and also a turbo will affect fuel consumption. Mostly just part throttle cruise. That's the only thing that worries me about replacing the cam in my daily tahoe. Fuel is so expensive and it already is pretty thirsty even with afm.
There's been a few reviews saying that their truck gets 14/22 to 13/20 city/highway with a truck cam. I watched them on TH-cam
It's all about efficiency... The more efficient you make your engine it will get better fuel economy as long as you keep your foot out of it.
@@marthamryglod291 that's better than my completely stock tahoe with afm.
@@skirkland1980 I'm averaging 15 mph 2005 Silverado SS stock. Was looking at cams because it seems like a win/win more power no loss in economy when cruising.
@@marthamryglod291 my display on the dash is saying I get 16.7mpg.
Nice. Now, vvt please.
I got the truck norris its a beast!!!!!!!!!!!!!
Really wish people would stop thinking the TN cam outperforms ANY stock cam for towing (1500-2500rpm). Unless you test the rpm curve from idle, everyone and their mommas knows larger duration, more lift and a tighter valve sequence makes more power at 6500rpm. I would take a stock 5.3 VVT cam over ANY aftermarket cam for towing or low rpm torque, that’s a fact.
Another amazing video 🙏🏻🙏🏻 would you recommend truck Norris cam for a 05 Escalade 6.0 daily driver ? Looking for better performance and little more sound …🙏🏻
yes
Good video 👍🏻🇦🇺
It definitely looked to me like both the Stage 3 and Stage 4 cams were running into valve control problems at the very top. Great point about whether it's worth it to upgrade from a Stage 1 or similar to the TN cam, if you've got a daily-driver tune in it. Like someone else said, I wonder if the Stage 3 & 4 cams would shine better with a 6.0 or more cylinder head.
Looks like im buying a truck noris cam for my year ish long build before boost gets to the motor. Let's get this stick (nv4500) truck to be the tow pig/ sleeper she needs to be!
Now I gotta pull my stage 3 truck cam out of my 6.0 for the truck Norris lol
you
are
amazing
!
I bought the truck Norris cam after seeing this video about a year ago. Unfortunately the dyno graph here doesn’t seem to match the driving experience. Two 5.3 lm7 engines I’ve put cams in so far and the stage 2 cam had a lot more bottom end than the truck Norris. Truck Norris cam drove similar to a stage 3 cam in my opinion. I was more impressed with stage 2.
you have your tune to blame-a stage 2 has less low speed
I commented on 1 of the other cam comparison videos. In short I am building a 408 for a Silverado. In my case the truck Norris is the winner. At the end of vid, you hit on probably the most important topic: the tune. If I don't have access to a tune shop w a dyno, what's the 2nd choice? I live in a small town in Montana and am not aware of any shops out here.
street or remote tune
Yo, first off I absolutely love your videos! I have a 2013 gmc Sierra 1500, collapsed a lifter it the 5.3 had a crate LS1 setting in the shop.. So I swapped her out! Swapped the crank trigger, threw in some springs and stage 2 in it.. I want more, what would you recommend?
INTAKE, HEADERS, PORTED HEADS
The Truck Norris cam works best N/A because of the tight LSA @107deg. Makes more power over a wide powerband. Those bigger duration cams with wide LSA's sacrifice alot through out the power band for small gains up top. Better suited for boost
The Truck Norris works well because of valve events and EVERY cam works with boost
Just talked to my buddy today about swapping my tired 04 Silverado 4.8 for a 5.3, and I knew about the torq can, so I watched that old video again.. And then I came across this brand new video and it was right on time it appears. Lol
So, bone stock truck, factory everything including exhaust, am I going to be better with the TN or the Torq? It's my daily truck, but I also use it for pulling a 6000+lbs toy hauler(please don't judge me 😁).
It can do it now with the 4.8 surprisingly, but I imagine a 5.3 and either of these cams is really going to make moving this thing much easier when I need to. I just want the best cam for this application, and the best for daily driving too. Fuel consumption already sucks. Lol
Some of the secret sauce on the truck norris is gotta be that 107lsa
Just a thought - what about a "other guys" LS cam test? We're all familiar with Comp and BTR but what other great yet lesser known cams are out there and how do they compare?
Would be interesting to see how the truck Norris goes with a 1.9 ratio rocker
Should be around .617” valve lift.. (would need valve reliefs)
it won't need valve reliefs-the lift is not what determines P-V, it is duration
Was going to order a BTR stage 3 or 4 cam, but I think now I'll get the Truck Norris. I have a 5.3L LM7 in my Z71 with Speed Engineering 1 3/4" long tubes and off-road y-pipe, speed engineering air intake with heat shield, 4.10 gears, Yank 3000 stall, and tuned with HP Tuners. Since I don't currently have an upgraded camshaft, I think Rich is correct that the Truck Norris cam would be my best choice and then I can work on optimizing my tune for 91 octane premium fuel that we have out here (these fuel prices are horrendous). I like that it makes more torque than all the other cams and in a heavy truck that I tow with I need all the torque I can get. I could care less about a few less peak HP up top since I don't stay at high RPM. I am going to raise my shift points to around 6500 RPM.
Thanks for another great video, Richard!
Just ordered the Truck Norris cam, BTR valve springs, and the valve holding tool. Can't wait to get it installed in my truck.
Update?
@@reyperez3424 I bought the Truck Norris cam kit direct from BTR. I went with their BTR springs and seals, and I bought the adapter for the spark plug holes to use an air compressor to keep the valves in place when changing the seals. I haven't installed it yet because it's getting cold here and I burned up my air compressor. Might just have a shop do the labor for me since I'm busy and don't have the time with having to watch my young daughter on my days off.
🤔 now I want to swap out my stage1 truck cam for the truck Norris cam 🙃
Curious to see what boost looks like with this cam
I'd like to see the bte weekend warrior cams vs this cam
Sounds like my stock silverado 2500HD will benefit alot with this cam and a tune…
Good info, how does it relate on fuel consumption vs stock, trying to figure best for daily without changing to loose converter, I expect higher fuel consumption but how much, I am changing rear gear to 3.73 and have longtube header (JBA) ON 4.8, It does pull small trailer on regular basis, so I'm shopping and doing research as much as possible
Richard, great stuff as always. You've really become the Google and Wikipedia of anything everything relating to street performance LS and LT engines.
I have a turbo question that I would really appreciate hearing your thoughts on-- I've watched you get big power out of the twin cheap gt3582 clones, but for a daily driver genIII 4800 (truck norris cam, BTR lifters, rods, beehive springs, "garage" port/polish 862 heads, 52lb injectors), would going with a single Garrett gt3582 be too small for a 560-650 crank hp goal? I feel like they're a lot of NA guys like myself who are interested in getting our feet wet in the turbo craze, but who aren't looking to just jump right in running 20+ psi, nor really interested in a set-up (yet) trying to "out-hp" the guy next to them, but rather, are more interested in a set-up with a low-to-mid RPM range grocery-getter with the throttle response that feels more NA than turbo if I'm making any sense. Essentially, there really isn't any information floating around anywhere for those of us that may fit into that niche. Would a single turbo that size choke me down to the point of misery? Thanks
the gt3582 won't support 650 hp-it will support 500-550 on the 4.8l
Truck Norris cam seems to be the perfect cam
I put a stage 3 in my 6.0 blazer. cuz I wanted to use Z06 springs that I had. Now I feel pretty stupid in seeing how the truck norris cam uses the same springs and makes more low end torque.
How about bfd cam vs truck Norris, thank you Richard!
Just the video I’ve been waiting for! Thanks! I’ve got a stock 6.0 in my 2004 Suburban. It is used to tow my camper, and I’ve been considering a cam. I just put shorty headers on it because the original exhaust manifolds were shot. The question I’ve been wondering is whether or not I would need to upgrade my valve springs if I were to run the Truck Norris cam? Anyone have any input on that? Thanks!
yes-you need springs
@@richardholdener1727 Thanks! Just wanted to be 100% sure.
I went ahead and replaced springs with the truck torque cam. Just ls6 springs as the btr brand equivalent was out of stock. With alot of vehicles that get cam swaps with higher miles, spring swap is almost always a good idea. Good insurance while you have it apart.
Richard I love your videos but the one thing you don’t talk enough about is with these truck cams you make all the torque and horsepower you want but guys need to know DOES IT NEED A STALL CONVERTER? Guys ask me all the time after watching your videos like the 54-454-11 comp cam GREAT CAM however you have people that may not know as much as say yourself or myself a engine builder and they buy the cam because they seen the 120hp gain but don’t add a stall lol and of course they are unhappy it won’t idle it won’t stop lol please know just helping love your videos bud just maybe make one called do I need a stall or no and maybe list that after say .580 lift or whatever I would run a stall. My favorite in my comp cam Bible is for instance the old flat tappet XE cams right when you get to “that point” comp cams says it’s not necessary to run a stall but ITS HIGHLY RECOMMENDED LOL RIGHT? because the SOB isn’t going to have power breaks at least for 40 percent of that panic stop lol just friendly help brother keep up the great work!!
Test the Tick Performance Towmax stage 2 cams please!
I second this. Also compare the torquemax cams as well.
Oh man ! Now you've got me pondering again ! I have a gen- 4 4.8 in a 12 silvy and had pretty much decided on the btr st2 4.8 turbo cam ....BUT NOW lol ,im wondering if this truck norris cam would help me spool the 7678 vsr turbo a little better ? What are your thoughts Richard ? Thanks !
pick the TN for that