Patrick G

iTrader: (14)

The 3200 is perfect for me because this is my daily driver. If it were a drag car, I would have gone bigger.

My car with L92 heads gained 13rwhp with the Yella Terra 1.85 rockers so I already had a 13rwhp head start on the 60-70rwhp gain people typically see with 230 @ .050" cam swaps (so the cam gains were more like 47-57rwhp). I'd say my heads were worth closer to 35-40rwhp over the stock L92 heads since Tony's FAST 102 porting typically adds 7-10. My L76 already had the FAST 102 on it before. I have not seen anybody's CNC L92 heads gain this kind of power over stock in a 6.0L. Remember, the 4.0" bore of our 6.0L engine shrouds the 2.16 intake valves and hurts their flow potential. A 6.2L with its bigger bore is happier with L92s but it's still not great.

The Mast Black Label heads have stellar flow numbers, but like so many high flowing L92 type heads, the hp numbers don't always live up to the flow numbers. More testing needs to be done on them before there can be a consensus on whether they're substantially better than L92 heads.

Patrick G

iTrader: (14)

Here's an idle clip. Sorry for the wind noise and mud on the car. We are having a tropical storm blowing through today and I just caught a break to record this.
http://www.youtube.com/watch?v=dqbUSQAEmaY

Mike454SS

iTrader: (4)

That car must be a blast to drive.

mike c.

iTrader: (1)

Nice pat. I always thought keeping my l92's is holding me back after seeing what the t.f.s 215 heads did on my buds 383ci. No matter what,the l92 head is just a stock head ported or not and i feel after market is the way to go. People see the great flow numbers of a l92 head and i don't feel they see the big picture,just numbers and they go crazy. In the past i gained 40hp losing my stock heads for some afr heads and i feel like you,i will make a great gain if i do a swap too. I just hope my luck will be as good as yours. Great results!

pharmd

iTrader: (4)

Any plans to run the car at the track? I'd like to see what kind of track times those power numbers result in. Must be fun to drive, sounds like a killer setup.

LS1CALIBOY

iTrader: (13)

nice gains man...What are you doin with the L92's I could use them...

ChucksZ06

iTrader: (9)

Comparing this engine to your TransAm is interesting. Smaller cam, auto trans, less compression? Offset by better heads and aproximately 20 cu.in. displacement. Almost same hp and torque. Congrats.

chrs1313

iTrader: (24)

absolutely amazing...

this was done with full exhaust, only a 231/231 cam, a4, and only 11:1 compression with 5-6 kpa vacuum...

holy ****, you would have to be crazy not to get these new AFR 210s or 230s if you are in the market for new heads...

just think what this would have put down with 11.9:1, a bigger cam, 102mm Tb, cutout in the exhaust, and being a m6...

530-540rwhp??

anyone want some TFS 215s

98blueSScamaro

iTrader: (14)

Looks like I held out on buying my heads for a reason. And think I just found it haha sorry chris.

Sommer86

iTrader: (46)

Hey Pat, what's the difference between the Gen III iron block 6.0 and an L76 6.0?..besides the fact that one is aluminum?

I'm looking to finish off my LQ 402 (that I spoke to Tony about 2 months ago) but now that I'm seeing these fantastic numbers on your 6.0, I might be leaning towards these 230 v2's for my build (and for Tony to "Mamo-fy" them). I was under the impression that even AFR 225's were overkill on a 402. Now I'm thinking that these 230's look just right....but I'd still need to select the right cam, as my car's a DD.

Thanks, and congrats on the GREAT numbers!

SLOW SEDAN

iTrader: (13)

They are good gains but (call me crazy) couldn't you gain a lot more power with that $$? Your out $3,000'ish on the heads, then the LSX-R and TB your out another $1500... toss in another $400 on the cam and your out the cost of a Procharger!

chrs1313

iTrader: (24)

just different ways to ring a setup out...different goals...

he could just buy a 500ci motor...

or get a dp nitrous kit and spray it will 250 shot (or just a 150 shot to get the gains shown)...would be the cheapest of all...

the goal was not hp/dollar spent...

SLOW SEDAN

iTrader: (13)

True, the goal should be to win.

1SLwLS1

iTrader: (6)

Congrats Patrick, pumps me up to put some new heads on my 408.

I have been swaying away from L92/LS3 heads just from the complications/lack of general knowledge and information. I am no where near experienced enough to try and figure all of that out, nor have the financial pockets to re-do it if my combination isn't fantastic. This brings excitement back to the cathedral ports for larger CI and strokers.

TooLateVTEC

iTrader: (2)

Nice #'s for sure.

What did it dyno with the converter unlocked?

JayplaySS

iTrader: (15)

Damn! How did I miss this thread? Amazing job!

Looks like a cheap 06-07 C6 could still make plenty of power with AFR/Mamo FAST and a larger cam.

Patrick G

iTrader: (14)

The unlocked converter lost 13 rwhp. Here's a dyno with the motor in speed density (Maf-less) with new mufflers running locked vs unlocked. 510rwhp locked, 497rwhp unlocked.

redsap05

Wow I think I just found what heads I want to buy for my ls2. The only thing is the jury is still out on the fast 102 for me. Some people gain power and some people loose power. Recently I saw a friend put a 102 on a 427 and loose power over the 92 so I don't know what to believe.

EDIT: I also have a dumb question buy why aren't these 230 heads on the afr website? Are they to new?

Sommer86

iTrader: (46)

Can anyone answer this for me?

Tony Mamo @ AFR

iTrader: (13)

Regarding the AFR 230 heads....

The website will be updated shortly guys.....bottom line is even if you order a 225 now you will get the better flowing 230 cc V2 cylinder head!

Regarding the FAST 102....

Pats engine would have been light a bunch of power with a stock or even a ported LS2 or LS6 OEM intake and even an out of the box FAST would have missed the mark by quite a few.

Bottom line, I have taken apart and ported hundreds of these intakes by now and seen small internal revisions to the designs along the way you guys didn't even know existed. The new 102 is a superior design....period, and properly ported its a beast! If you cant tell, yes....I really like this new intake....LOL Its by far their best design yet but like all the others requires the right massaging to get the most from the swap and trust me when I tell you its not done with just a hardroll!

https://ls1tech.com/forums/generatio...-102-fast.html

Now to be fair to the guys at Comp/FAST, some of these issues I handle with the grinder cant be helped because of the tooling necessary to produce the manifold.....its impossible to produce a perfect piece that you can pull from a mold....some shapes require taper and other tricks to allow the parts to be even be removed and manufactured. Alot of what I "fix" is related to that (and has always been) and then I add a few tricks of my own.

Hope this clears up a few things....

Thanks,
Tony