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What's the compression ratio?

would love to see some comparisons between frankenstein heads and other brands!

it sounded like you mispoke but I've heard others say it this same way and either I'm confused or they are. so at the end you said tenths of an inch but that doesn't sound at all like what I was taught. I was taught 0.1 Tenths 0.01 Hundredths 0.001 thousandths and what I think you were talking about is 0.0001 ten thousandths. is that accurate or am I mistaken?

Need sbf heads

Early 2000s my mate used to polish 4g63 heads for $1200 a piece he went on to become a meth addict but I swore he had potential to be great 😢

😂😂😂😂😅

Yall pick some awesome music. Any future videos about the gen 3 hemi heads?

You guys give great head(s) to all racers.

subbed. I know a craftsman when I see one.

WICKED !!!FRANKENSTEIN MAKES THE BEST BILLET INTAKE MANIFOLDS PERIOD!!!!

How do they compare to MBE 10* LS?

Beautifull Heads 😅

❤ ur Work .

Got flow numbers?

Awesome music. Are there any plans to make any videos for the 5.7 hemi?

Well said! that is a very frustrating situation especially with someone is not telling the whole story…

But how much is an o ring kit for maintenance?

Cleveland size ports.

austin

Those are some bad boys.

Looking more like a SBF head all the time 😂

I need some of those in my life 😁

Its a shame to install that on an engine. I have been porting heads for years, it takes a lot to make them look that good.

This shit is art to me. Love the song by Rammstein btw.

Thank you for your knowledge and videos USA 🇺🇸 TRUMP

em, you forgot to tell us the valve guide clearance is also based on the WEIGHT of the oil you are using- ding

Hi, A great video. I think the biggest problem you have- with LS customers AND they are your biggest critics? They are the dumbest/ cheapest racers on the market.Dumber than mopar guys, cheaper the pontiac guys.. So you are faced with dumb cheap guys who know how to work the internet. Good luck. You will need it.

SO GLAD you are commerical free!!!!!!!!

Just keep doing what you’re doing Chris because you absolutely can’t make everyone happy all the time trust me I have learn that after being in business for 31yr. but if you’re doing the right thing for the right reason no negativity comments will effect your business in any way !! I understand why you made this video. but just let your product speak for itself!!

Damn Chris you’ve come a long way brother I remember the days of you working in the shop out back of the house. Long way from there now !!! I’m proud of you brother!!

You get more bees with honey. Mistakes happen on both sides. Being nice goes a long way!

Good products, good info, but you lost me after 1 minute of that background boom boom crap.

Any thought of a billet Ford Coyote Cylinder head.

Hey Chris, I do have a few questions regarding opening the exhaust ports up to reduce restriction and EGTs at port itself and its relationship to velocity driving the turbo on a diesel engine. I know you’re a gas engine guy but I still listen to you quite a bit on your turbo videos. Also a few questions regarding a custom ground cam and what the minimal overlap can be and if overlapping can be reduced to zero to keep the high pressure hot gases on the exhaust stroke from interfering with the cooler compressed air charge entering on the intake stroke? Separating/Isolating the hot gases from the cooler air should help air density and improve efficiency regarding the 7.3 powerstroke with the hindering 2 valve design. I’m focused on improving that design with a few key alterations, upsizing the valves, custom valve seats with a larger ID made of better heat transferring materials, same with valve guides, also focusing on springs and retainer upgrades. I need to flow test the set of heads I ported, they have helical intake ports so cylinder swirl is an important factor for fuel atomization. I need more time to devote to the development but HVAC is very hectic in summer, and it would be nice to have a flow bench at home

Are you telling me that you don't drop test your heads? Shame, Shame. :-)

Any chance one of these heads was on a yellow ZO6?

Volume tells nothing about a port but its volume..........

Customer's and shops expecting a safety net for their "learning curve" and self induced components failures has been growing for decades. I just had a shop / customer call expecting a refund on an engine they destroyed on their dyno caused by an admitted lack of monitoring ignition timing during the pull. The engine was detonated to death and the bearings proved it. It will only get worse as the enthusiast thinks bleeding out on the forums is a cure for their ills.

the valves are quality valves from different company’s . the common part is your cylinder head.. it’s never good when companies defend their product.

Have you guys addressed the F series heads that were cracking at the lower exhaust bolt area ?

Legit PSA! I've been in this industry 23 years professionally, and I too believe that a firm stand needs to be made at times. 99% of my clientele came from unhappy relationships with their previous shops. I strive to keep my people happy, but I've held them just as responsible in the case they caused any failure.

Let me guess, more people complaining that the seats fell outta your China 310 heads. Well It's there own fault for buying that crap.

Disclaimer. If this product is used for racing. No warranty applies. There is NO product that is fool proof.

Definitely!!! I like carnage videos!!!.

Just curious,does pro filer cast your heads. ?

Just wanted to let you know I really appreciate you doing these videos, it does help with siphoning thru the BS. BTW I had some m311 heads installed on my Thompson Motorsports ls427 they built us for autocross. We requested an engine that had a lot of torque! When we dynoed the Vette it made almost as much torque as horsepower! The dyno guy said he’d never seen that before and that he was thoroughly impressed and that was with a failing throttle body. I told him it must be the heads, torque and horsepower! We are still developing the Vette but just won our first race! I’m very happy with my FED cylinder heads.

Hi Chris 🔥🔥🔥

Any SBF heads??

I wonder where I have heard this before.

My brain wants to know more about these M311s I have. They’re such a beautiful product.