Doesn�t seem to be many using Frankenstein heads for some reason.
Build is a TSP 408 with -3cc flat tops. Fast 102 intake. 92mm TB. T56 car. �88 C4.
Looking at the M115s-just a fun street car and I already have the intake so I�m sticking to cathedral ports. Plan on going turbo in a few months, Anyone have experience with these heads?

 

Why spend the coin on aftermarket heads of your putting a turbo on soon?

 

Thicker deck + I want nice things for this build

 

I haven't heard anything bad about Frankenstein but it seems MAMO is guaranteed top performance.

 

Frankenstein initially posted dyno numbers that were incredible, for their pre-release. Several builders and enthusiasts as well early on, did builds with the product and it simply didn’t live up to their original posted numbers. So they stepped on their own feet early on. Their product is high quality, and reliable, and I’m not trying to bash them…it’s nice stuff. If your going boost, head choice isn’t critical, other than casting reliability. You can put any head on that engine and make 1000 wheel on accident.

 

I have 2 sets one on the shelf and the other is on my 02 SS they are absolutely a work of art the power difference going from 241s to these was crazy. I thought going with the 235 ports was going to make it lazy
But I feel no ill effects.
I have a engine with mamo 235s also
And can say in my butt dyno can't tell between the 2

 

is this on a stock cube ls1 or?
not much info on any of the Frankenstein heads out there but I�m guessing that�s mainly cause they�re made to order with 6-8 week waiting period.

 

Yes stock cube 02 ls1 m6 convertible
Mamo set is in my jeep now.
Spare set is going on a l94 if I get my lazy butt off the couch and get after it
Maybe when hockey season is over

 

That�s in line with what I�ve seen. Mamo numbers are all over the internet and repeatable, while achieving the torque numbers that Frankenstein posted early on is virtually impossible in a N/A 440� LS engine. They work well, just not quite as well as hoped. Absolutely beautiful craftsmanship however.

 

Any idea how much
power my TSP 408 with BTR stage 4 turbo cam (227/24x .618 115 LSA) and Fast 102 intake +T56 should make on motor with the M115s?

 

Hopefully you have reliefs cut in your pistons I have a patg cam and with true 62 cc heads and a .040 head gasket I was close to cutting and your exhaust side is bigger than mine.
Intake and lift are real close to mine.
I'd say 510 to 525 on a dyno in my area just guessing

 

yes
-3cc flat tops with valve reliefs

 

was that with valve reliefs in your pistons?

 

I didn't have to cut mine in this engine but the on in my jeep has mamo cam and heads and it had to go around .030 them I had a slight kiss missing a gear

 

neither engine had valve reliefs?
was planning on a .051 gasket along with zero cut and quench recommended by a FED employee to get my comp below 11.

 

One does now the one in my 02 SS
Does not I told patg I wanted to get as much cam as I could without cutting it's a real pain to do in chassis
Plus I moved my rev limiter down
I wouldn't have had to cut on my other one if the limiter was in place

 

I�ll def check for ptv clearance when the heads come in but the employee I was talking to said you can run over .700 on these so I should be good. 🤞

 

It's not the lift it's the duration
I knew mine was going in my jeep
When I had it out so that's why I pulled the heads to make sure there was no damage you could see a light shadow on the pistons where they kissed I had no damage so to be safe I cut them since the Jeep will be driving by lots of people.
No one but me drives the Camaro but me so I'm not as worried. And it has a limiter set to 7k where the other was well above that

 

If your wanting to make big power numbers, call Tony. I did a 403 last summer for a guy that made 593/525 wheel on a DynoJet. LS3 style top end. I can duplicate this engine all day if your interested. It’s an honest 700 hp 403 inch engine on pump gas. Combination is everything, but good heads help.
Here’s a link…https://ls1tech.com/forums/generatio...-n-buildo.html

 

+1 on this. Their 243 head porting numbers were phenomenal. When I talked to tuners in town, I was told that absolutely zero of their ported 243 heads came close to advertised. Just but a bad taste in my mouth, plus it seems like most of their stuff nowadays is focused on max effort/race engines.