Gojira94

iTrader: (4)

For upgrade in the spring, I'm planning the following:
(94 formula A4)

AI 190cc heads w/ 54cc chambers
Stock rotating assembly
Comp 280XFI cam, with 1.55 Scorpion rockers (SCP1007BL)
gives 230-236 duration (will have a slight shave on duration due to decreased lift, lift on 1.55s will be .558/.552)
3.73 gears for 2-series carrier
Circle-D 245mm 3200 stall
Moroso CAI (already done)
True duals- Pacesetter 2239s, X pipe 3" > 2.5" dumped Flowtech Afterburners before the axle (already done)
Stock TB
Stock intake
SVO 30#
255 pump/ upgraded harness
PCMforless tune

Looking to make my power between 2200 & 6300. Mostly looking for feedback of the cam/ rockers choice.

Thanks-

joshh123

iTrader: (1)

i ran 1.52 RR's till i could afford the 1.6's. you'll want the extra lift. it all around ran better with the 1.6's

Gojira94

iTrader: (4)

What cam/ heads? What was your setup like?

jlpz

iTrader: (8)

I see your running a 3"-2.5" exhaust but using the stock TB...These cars love to breath which equates to more power..That's the only problem I see in your set up the TB.

Gojira94

iTrader: (4)

Slightly crisper throttle response, perhaps, but the stock 48mm TB doesn't become a restriction until somewhere around 500HP, IIRC...

jlpz

iTrader: (8)

That's true but most of AI's stuff make between 420-430RWHP which right around the 500HP in the motor...some people say it's 17 to 20% drive train loss...I'm just saying..take my advice with a grain of salt. .

Gojira94

iTrader: (4)

Sure, I got you. Stock bore, stroke so I'd think probably more like 390-405 at the wheels, more like 480 at the crank. TPIS has a nice 52mm for around $200.00, so no big deal to change that if it seems to be a restriction down the road. Easier than changing my mind about a cam.

flyinZ

iTrader: (15)

Id ditch the cam and the rockers. I'd go with whatever AI would recommend you. That would get you the most power, with what you have.

Gojira94

iTrader: (4)

Thanks- I've seen that AI advises against excessive lift, as their heads are efficient enough they don't require a lot. I recently heard them raise eybrows at .575-.570 for a 220s-230s cam. 1.5s would give me .540/.534, 1.52s would do .547/.542. I wanted something a little more than a 503 and slightly improved valve open/close events and the 467 fits the bill there.