docwyte

iTrader: (4)

What do you add to get it?

Car has an '02 SS motor with the LS6 intake manifold and throttle body, shorty headers, dual 2.5" exhaust and Thunder Racing 224 cam.

I can't swap the cam or exhaust (this is in my Porsche 944), but I can swap heads pretty easily. Depending on how tall the intake manifold is, I may have room for an aftermarket intake manifold...

TIA!

Tobias05

iTrader: (1)

send TB to get ported, add UDP, purchase some ported 243's of your flavor, and a retune should get you pretty close to your goal.

zracer323

iTrader: (12)

If you can't do a cam then my vote is for nitrous

X-ray

iTrader: (6)

Why, you live in Commiefornia?

Since you didn't mention a budget, I'd get some AFR heads. Ask a sponsor like TSP what size would be best for your application.

I don't know how much bigger the FAST intake manifolds are compared to the LS6 and if they would fit, but you can search the classifieds for used 90/90 setups or 92/92 setups, or buy a new 102 manifold with your choice of throttle body (Vengeance racing recommends a 96mm TB I think for tuning or some reason).

A bigger MAF may help a little. Get a GM 85mm truck MAF.

Aftermarket air lid, assuming your setup has one.

The aforementioned underdrive pulley. And, a very expensive bolt-on IMO that I won't do, an electric water pump.

docwyte

iTrader: (4)

Well, because I already have a cam, need to stay emissions compliant and most importantly, you can't swap the cam in my car without removing the engine. I'm not going there...

So basically I'm constrained to heads, intake manifold, throttle body. I already have an air intake, space constrained, so I can't do anything else.

Not willing to do NOS, this is a road race car, so I need the power to be there for a 30 minute session...

BennyB

iTrader: (12)

throw a 75 shot on it and call it a day

EDIT: just saw it was for a road race app... i would definetly try some afr's or trick flows then for sure.

LOL at the guy below me.... your on it buddy

DSkyles

iTrader: (1)

Apparently ^that guy can't read the post right above him.

camz28arro

iTrader: (12)

PRC LS6 heads to top end AFR 210cc heads, underdrive pulley, fast 92/92 intake if a 102mm will be too tall, and a 85mm z06 MAF. That should easily do 50rwhp, maybe 60rwhp.

garygnu

AFR heads and a fast 102mm intake TB combo mite do it.

NVR_SPDS

iTrader: (39)

Like was said, if your budget allows it, go with a set of AFRs. The 205s (mine are 63cc, numbers coming soon) are even CARB legal for us stuck in Cali, but they make great power.

docwyte

iTrader: (4)

OK, thanks for the suggestions.

Have another question, what sort of power are people seeing at the wheels with:
Shorty headers, dual 2.5" exhaust, LS6 intake manifold/throttle body, intake and a Comp Cam 224?

I dynoed 340rwhp with this. Is that about where I should be? A few folks have been telling me I should've dynoed closer to 380-390rwhp...

SOMbitch

iTrader: (8)

340 is low and depending on drivetrain loss 360-380 is what you should expect....

docwyte

iTrader: (4)

That's what I thought. Time to check the tune and cam timing. What else could cause such a power loss?

docwyte

iTrader: (4)

Got the car on the dyno again this past Friday. Got a pretty consistent 337rwhp. AFR's were good at 12.8, timing curve and advance were good, MAF was reading 9000+ grams.

All looked well, but it only made ~340rwhp.

I can make up to 370rwhp and stay in the time trial class I'm in. Should I be looking for something wrong with my motor and do a compression/leakdown test, or do I simply need to add bigger heads/cam/intake to get my +30rwhp?

Marktainium

Which Dyno was that on? Mustang? Dynojet?

docwyte

iTrader: (4)

Dynojet.

janaka

iTrader: (7)

I was at 363~rwhp or so with a 224 cam/LS6 intake/stock TB/hugger headers (2.5" off collectors to single 3"). T56 w/Mcleod clutch/flywheel.

Added FAST90/90 and I'm at 378rwhp now.

lemons12

iTrader: (71)

If he isn't sure if he can fit another intake on there the 102 definitely wouldn't be what I would try, it sits way hiher than my ls6 or 90 that I had.

I would get a set of used afr 215s and a retune.. if that doesnt get you there hen I would look into a 90 mm intake tb setup. Those afrs are going to give you a lot of midrange also which I'm sure you spend a lot of your time.

docwyte

iTrader: (4)

I've found a set of CNC LS2 243 ported heads by Wegner Motorsports locally that I'll pick up.

Hopefully those will get me the power I'd like.

docwyte

iTrader: (4)

I was less than impressed with my dealings with EPS. I wanted one of their cams, wasn't told that it would take 3+ weeks to make it when I ordered it. Then when I called 10 days later to inquire where my cam was I was told the time table.

Unfortunately that didn't work for me and I wanted to cancel my order. They assured me they'd rush the cam out. 1 week later, still no cam. I call them and he know says his cam builder is out of blanks.

He then asks if it's ok to send me a Thunder Racing cam instead. I say ok, he charges me over night shipping and what turns up is a Comp Cam instead.

So all in all, a very poor experience, as well as I paid the money for an EPS $350+ dollar cam and got a Comp Cam that's quite a bit less expensive instead. No refund, no call explaining why I didn't get a Thunder Racing cam, etc, etc.

So those guys are in my dog house right now.

Another friend has pretty much the exact same setup as I do in his converted 944 and is making 389rwhp. So I don't think the exhaust is really that restricted...