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Upgrading 4.6 DOHC Cams - Supporting Mods to Protect Your 4V Cobra, Mach 1, or Marauder Engine!
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- เผยแพร่เมื่อ 25 เม.ย. 2021
- Upgrading cams on your 4.6 DOHC engine isn't the easiest. But often overlooked are the supporting mods required to protect your 4V engine. Supporting mods include upgrading the valve springs, valve retainers, pivot pins, secondary chains, and adding adjustable billet timing gears along with the Cobra Engineering secondary chain fix to tie it all together.
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#mach1 #mustangs #supercharged #mustangmach1 #mustangproject #enginebuilding
Great dialog one this video. So insightful can not wait to hear this run!
Thank you Chris! It's been fun a fun project and looking forward to having it all put together. Trying to complete it in time for Blue Oval Fest on June 19th. It will be close!
G'day Mike Tim from Australia. Just did a timing kit, lash adjusters and oil pump on my 5.4 260 Boss engine (dohc). Used the Accufab secondary chains as the stock ones were failing. I advanced the cam timing to 108 in and 112 ex with 110 lsa. Engine has greatly improved low end response as well as more top end. Great video mate!!
Thank you very much. It sounds like a great engine! Enjoy it and let me know if you need any help. Thanks!
Thanks for the reply. The engine has crow Performance cams that are the largest that will fit in the 260 without modifying the cam journal bridges. They are supposed to be 202 @50 but measure up at 220 @50 with 435" lift. Also have fitted a twin 60mm front mounted throttle body on a custom plenum.
@@timh6977 220 is pretty good duration. It should have a good sound to it. Thanks again for watching Tim!
Wow Mike, you really know what your doing, great videos, i went back and watched them all,
Thanks Justin!
Hey Mike, it was nice seeing your mug in the intro😃 Btw I liked the excellent dialogue/explanation! Now we gotta get your mug in the outro. Great video brother🏁
Thank you for watching Paul. I'll work on the outro part. Any new updates on the build?
@@MikesGarageRoute66 Actually yes, the short block is assembled and I asked him about the head gaskets and he said we’re using a 94mm. Thanks brother🏁
Can’t wait got a 04 torch red Mach got it from my uncle who has had more show mustangs than I can count. rocker arms took a crap. However I’m rebuilding too end putting 106400 comps in thanks for the video!
If anyone has any tips or suggestions for me please feel free to
Thank you very much for watching!
Great video Mike. Maybe one day I'll put a modular motor back into my car.
If I didn't use a mod motor this would have been done much quicker. Pick up an LS motor, th400 trans, supercharger, and 🍺. Thanks again for watching!
@@MikesGarageRoute66 Mike the purist with an LS swap. What is this world coming to 😂
Sounds like a coyote swap waiting to happen 💪🚗💯🇺🇲🔧🔥🔴👍
Really Informative and Well-presented info ! 🤓👍🏼👍🏼
Thank you very much, I really appreciate it!
Super knowledgeable Mike👌🏻
Thank you for watching Sally and leaving a comment. Very much appreciated.
Great info, very detailed. Love it
Thank you Amel. You do very good work so that means a lot.
Great video. Nice work.
Thank you Justin! I'm sure you have had fun timing the dohc's. I think 2 valves are much easier.
Great vid and interest information. Currently getting parts ready for a cam swap on the aussie 5.4 4v.
That’s should be a good project . When you do the swap pick up the tool to lock the cams in place. It will protect the valves from being bent. Thank you for watching!
@@MikesGarageRoute66 beauty thanks mate.
I was looking at a complete mmr timing kit alao as they seem good value as a complete kit instead of buying a few individual items thats realky required..
Do you have a link for the cam lock tool and does it only work on comp cams as im using an Australian cam which appear to be made differently.
The MMR timing kit worked really well. Here is the link to the 4.6 / 5.4 Cam Holding tool. amzn.to/3yffiWd
@@MikesGarageRoute66 awesome thanks heaps mate. Appreciate it. 🤙
very cool stuff, its going to be a great engine
Thank you! I'm hoping it will turn out good. It's the little things that are overlooked or missed that come back to bite you. I'm hoping I have everything covered!
@@MikesGarageRoute66 Looks like you are paying attention to a lot of the details for sure
@@Lethal_Venom I'm just hoping I don't miss something. Fingers crossed.
@@MikesGarageRoute66 I’m sure you will be fine
Looking good buddy
Thank you Sabino!
I've been talking alot with BST ford about the dohc swap on my 03 crown victoria cvpi. What I was wondering is if you had a list to change the car over to dohc properly?
Some interesting stuff sound like you have done your home work 👍👊💪🚗💯🇺🇲🔧🔥
Thank you, It's been a fun build. Hoping to start it in about a week or so.
Hello there. Love your videos. Lots of good information. I'm building a 99 cobra engine with a eaton swap. I'm pretty sure the 99 has the same cams as the 01 you are using. My question is did you actually pick up the power you where estimating by advancing your intake cam and retarding your exhaust cam? And how is the driveability of the vehicle and idle quality? Thanks for your time
Hi Brian, thanks for watching and great question. I actually did pick up power in the midrange where I expected. Before I tuned the car, I had the bypass open on the Eaton. Even with slightly lower compression I felt more midrange torque. I probably lost 5 hp at the peak but picked up 30 hp in the midrange. Thanks for watching!
did you upgrade the oil pump. had a melling pump put in during the rebuild. btw, my chain guides were found in the oil pan.Talk about rattle. LOL
Yes I used a Boundary oil pump. Oil pressure is really nice and high. Geez that must have been one hell of a rattle!
Hey Mike, thanks for the insightful video! I have modular head shop stage 2 NA, NSR cams for my 01 cobra with the MMR full timing kit. Since these are mild NSR cams and the cobra only had 30k miles can I get away with keeping the OEM valve retainers and springs? Here are the cam specs: duration 226/222 lift .425”/.425”
Ps - I have the timing chain death rattle on start up…can’t wait to get rid of it!
Thank you for watching. What are you goals on boost pressure and rpm shift points?
@@MikesGarageRoute66 my plan is to stay naturally aspirated and maintain stock redline at 6800
@@mattsgarage6385 Technically you can use stock springs for .425 lift and they will not bind. Also since you will not use boost it was have enough seat pressure which is 65 pounds. RPM wise the springs start to float at 7400 rpms. So on paper yes it will work if you shift at 6800 max with .425 lift. In real life a few guys have broken stock springs with .425 lift cams on the SVE forums. It is up to you and how hard you will run it (don’t miss a gear)…. Upgrading the pivot pins is a must with a higher lift cam if you have an aluminum block.
@@MikesGarageRoute66 thank you! I will make sure to pick up some upgraded pivot pins
Is it worth throwing 98 cams in my 01? Trying to do a max effort budget N/A build but still daily friendly.
Not really, just slightly more duration on the intake cam which leads to 2 to 3 more hp.
My car somtimes does that rattle on start up, not everytime but my butt puckers up a bit everytime it does it,
I hear ya on that. I wish there was an easy fix for it. Unfortunately there's not. With the extra slop in the timing chain and tensioner the concern is at some point it can jump a tooth.
from what i read aviator mach 1 and cobra 4.6 cams are all the same
Thank you for watching. You are correct, the Aviator, Marauder, Mach 1, and 03/04 Cobra have the same cams with 184 degrees of duration on the intake and 196 exhaust. The 96-98 and 99-01 Cobra share the same exhaust cam as the others listed above, but the intake cams are different. The 96-98 have a split duration intake with a duration of 204 degrees. The 99-01 Cobra have a single duration of 200 degrees. This has been measured and confirmed by Todd Warren. www.svtperformance.com/threads/origional-camshaft-specs.604720/
Chains are fine, factory gears are fine
Thank you for watching
Hey mike where did you get your billet gears for the cams and crank ?
I went with Adjustable gears on top but I used red locktight and standard Ford gears on the crank
So I’m guessing you didn’t upgrade the chain guide pivot pins? I been on the fence about this.
I reached out to James at Cobra Engineering and John Mihovetzat Accufab Racing. They both said upgrading the pins s only needed if you use higher lift cams, stiffer valve springs, or you are using a 2 step / wot box. Otherwise you are fine.
Would you recommend new adjusters/followers also?
I would replace the adjusters, but the followers rarely wear out.
@@MikesGarageRoute66 I did buy new adjusters, but the followers had me worried.
This is too wild for me. I love the video but dislike all those chains ( seems tough ) thats why i dislike seem tough.. I know the words you where saying where like %E&%E^R^*^$&%E#&^$*^#*&#&^% and %#&#*&$^$*^^ this 4v lol.. Love the video and it had the depth and detail
I'm still cursing at the chains! ROFL! Hopefully the timing will be completed by the end of this upcoming weekend. Thank you again for watching!
Which cam degree kit did you get?
I ended up getting the modular head shop timing kit. Its a decent kit. Thank you for watching.
@@MikesGarageRoute66 comes with everything you need for a 4v?
@@sSkillaz336 Yes. The only thing to be careful of is the steel piston stop. Even if you are careful it may scratch the piston. Had that happen on cylinder one and I was very careful and had a dab of oil on the end of it. The mark is about .005 deep by visual which is only cosmetic as the piston crown is .230 thick.
Rechecked the timing wheel halfway through the timing procedure with cylinder 6 and this time used a piece of duct tape to wrap the end. No issue that time.