kieferskustoms

I am looking for another 20-30whp out of my lq9. I am running 317 heads decked .020" with cam specs as follows 228/230 .585/.585. Running ls6 intake, truck tb, and truck maf. Car made 405whp and 384tq on a dynojet through a M6 with ambient temps around 90 degrees and humidity around 70%. Im looking to keep it very streetable mostly because it is in a porsche 911. Wondering if i would be better off going a little bigger on the cam, deck the heads another .10", or swap to diff heads. Opinions?

JakeFusion

iTrader: (7)

You could go with better heads (TFS 220s for example for the 4" bore) would pick up probably 35-40rwhp. Then you could add a FAST 102 on top for another 15-20rwhp. It'd actually probably drive better as well. You'd have more compression, a ton more flow, and more torque from 2000+rpm all the way to redline.

Talk to Brian Tooley about doing hand ported TFS 220s for 4" bore w/2.055" intake, BTR Platinum springs, and PM guides for stock rockers. Should be around $2100 or so. Then you can add a port-matched FAST 102 to that for about $1000 + $350 for a NW TB. Then you'll need longer pushrods ~ 7.500" for $110 or so.

The cam is good. But if you swapped out one with a little more lift and more exhaust duration, you might gain some top end power without losing any midrange.

kieferskustoms

I considered swapping to a fast intake also, but my only issue is that since i am running a truck dbw tb. If i swap to a fast intake i would need a 4bolt dbw tb but i think the clips are different on ls3s and whatnot aren't they? Is there an adapter harness for that or are they even compatible with my truck pedal, tac module, and ecu? For reference I am running an 05 gmc truck computer.

JakeFusion

iTrader: (7)

You can run that on the 102. They make a 3-bolt to 4-bolt adapter flange. You could also run the FAST 92. But the TB will bolt to either. The 102 will make 10HP more.

thunderstruck507

iTrader: (18)

Your cam is already decent sized, you won't gain what you want from a larger one and the car will drive worse

You need a good fully ported head to get what you want

HCI2000SS

iTrader: (2)

How much more power would you like?

kieferskustoms

The only issue with that is i am maxed out on room. An adapter plate would be just long enough that i wouldnt be able to close my trunk. Even with the trunk lid all cut out it still rubs a tiny bit

kieferskustoms

Just looking for another 20-30whp more than i have

kieferskustoms

So are you thinking port my 317s or go with aftermarket heads?

JakeFusion

iTrader: (7)

TFS heads would get you there.

Or TEA or AI could port the 317s...

HCI2000SS

iTrader: (2)

Just a good ported Fast 102 alone would probably net you a solid 20 hp

JakeFusion

iTrader: (7)

20HP isn't very noticeable to be honest. But adding heads + FAST would be damn near 60rwhp. And that would be noticeable.

HCI2000SS

iTrader: (2)

The only reason I suggested it is because he mentioned only wanting another 20-30 hp, but I definitely agree with what you're saying

kieferskustoms

I know 20-30whp isnt much but i am mostly just looking for a little extra to ensure the win vs a few cars. Haha. Thanks for the advice though guys. I think i might just look into getting my heads ported. Anyone know if an ls3 tb would be compatible with my setup if i did switch to a fast intake? Im pretty positive i cant make mine fit with an adapter plate because of clearance so im hoping i make that work

JakeFusion

iTrader: (7)

Any DBW TBs would work. Well, I say that, but the LS3 is reverse rotation vs LS2 I believe. So the LS2 would be a direct swap and would fit. NW also has a 102 DBW that would work. It's over $500 though...

kieferskustoms

So they have the same wiring clip then or would i need an adapter?

thunderstruck507

iTrader: (18)

Depends on your budget. Getting your heads CNC ported would be cheapest. But you would gain a good bit more from an aftermarket casting and should be able to get more compression without sacrificing piston/valve clearance.

Slowjr

iTrader: (1)

Sorry for the hijack, but i have the same question regarding my setup.lq9 with prc 2.5 5.3 heads, f13 cam, and holley mini ram 90mm intake. T56. I think the cam is hurting me. What doyou guys think?

HCI2000SS

iTrader: (2)

I run the same heads as you on a LQ9 but my cam is between a MS3 and MS4, and to be honest it's a really good fit IMO. You might gain a few hp with a more aggressive cam but I wouldn't say the f13 is hurting you

Slowjr

iTrader: (1)

Thanks for the responds hci2000ss, ive been wanting to get a more aggresive cam for the same reason that i was thinking it was hurrting me. Well I have 342s, what do you guys recommend for my set up? I'm about to swap 373s, do you think that will help out or do I need more.