Patrick G

iTrader: (14)

This is one of the most thoroughly prepped cam-only cars I've had the pleasure to tune. It's a 6 speed manual 2006 Corvette with a stock LS2 short block. After adding American Racing Header 1 7/8" with no cats, Magnaflow catback and tune, the car put down 390rwhp. Strong, but certainly within the realm of what healthy LS2s make.

Next, the following items were added:
FAST 102 LSX-R intake (stock, unported)
102mm electronic throttle (yes, the big one)
MAF delete with 4" straight tube (no inlet restriction at all)
Calloway Honker CAI
ASP underdrive pulley
Patrick G custom 234/242 .602/.605" 112LSA +4 advance cam ground with EPS lobes
Yella Terra Ultra Lite 1.7 ratio rockers
Patriot Extreme dual valve springs with Ti retainers
Manton 11/32" pushrods 7.475" length (shorter pushrods were too noisy)
21 degrees of timing at peak torque, 23 degrees of timing at peak power, 12.5-12.8:1 A/F ratio.

Final results were: 502.945 rwhp/451.791 rwtq.
The way the EPS lobes carried power was a thing of beauty.

BORN2FLY

iTrader: (76)

WOW..... Those are some SUPER NICE #'s with stock 243 heads!!!!

Interspy24

iTrader: (4)

That's INCREDIBLE power with a moderate sized cam. Congrats!

Paint_It_Black

iTrader: (1)

That's just silly..

Geoff is the cam master.

printmanjackson

iTrader: (1)

why did the torque curve flatten half way then jump?

and why the MAF delete?

venom ws7

iTrader: (13)

Damn awesome numbers...

C5_Pete

iTrader: (8)

Good questions... I would like to know too...

Regardless, very nice numbers. You seem to be able to get great performance from your grinds. I'm sure a lot of effort was put into this project.

How do you think this would work on a FAST 90/90 equiped LS6?

MYSTIC-1SC

iTrader: (14)

awesome results.

Theblacknightls1

iTrader: (1)

Damn nice numbers .... Can i get a 500rwhp cam only too.... lol

Camaro ss 2001

wooow

well done

sayed_000

very nice ..

stock clutch ??

Patrick G

iTrader: (14)

Yes he is. Great lobes. This is one of my favorite Patrick G custom high-rpm LS2 grinds.

The flattened torque curve is very common when running a cam with a lot of overlap coupled with the American Racing 1 7/8" headers. Typically, the curves you see are higher at 3500 rpm and lower at 4000 rpm, but with tuning, we were able to flatten the curve out. The steep climb of torque to 4800 rpm is a testiment to the well chosen valve events. It comes on the cam very hard!

The MAF delete was mainly because so few MAF options exist in the 102mm range. The stock 85mm MAF is way too small for a 102mm TB and large necked cold air intake. The stock MAF would have been a choke in the system.

The cam would work well in an LS6, but keep in mind the LS2 has 18 more cubes and another half point of static compression. Also, there is no denying the gains when you use the big 102mm throttle body on a combo that turns a lot of rpm. I feel that the FAST 102 intake with the 102 throttle body with the 4" straight pipe with the Calloway Honker were responsible for at least 40rwhp of the gains (vs stock). A FAST 90/90 would be down 10-15 (because of the added gains of the larger TB and MAF delete). An LS6 intake with small MAF would be down 25-30rwhp in comparison. Don't forget to take away another 25rwhp if running a 5.7L vs a 6.0L. Take away another 10rwhp if you don't have the stiffer pushrods and low friction Yella Terra rockers.

Yes, still stock clutch. It's not very happy, but it's holding for now.

SHovV

iTrader: (1)

wow. very impressive

dennis50nj

very nice... is there a chance of any 1/4 times to back it up in the future

allngn_c5

iTrader: (3)

Not sure the clutch would hold any kind of launch considering its unhappy already, but I'd like to know as well.

Hey Pat, this is one bad *** setup. I remember all the effort you put into your WS6 and made 507 rwhp. He's got a few cubes on ya but is running stock heads and managed to get within 4 rwhp. How do you think this beast would respond to a set of TFS 215's? Or another set of quality aftermarket heads ?

If he does add heads, what clutch would you suggest.

Patrick G

iTrader: (14)

My WS6 lacked a couple of things that helped this combo make a big number. First, the exhaust. While my F-body exhaust was one of the best ones for its day, this C6 exhaust is 1 7/8" (vs my 1 3/4") with x-pipe and dual 3" pipes all the way back. There's also no denying how well the large 102mm TB works with the new FAST 102 intake. We only get a 1 KPa drop in MAP vacuum at 6800 rpm. The intake restriction is virtually non-existent. The added 18 cubes of this LS2 helped add another 25rwhp and plenty of torque vs my 5.7L LS1.

Future clutch choice will depend on what kind of racing Robert wants to do. The street manners are so nice right now, I'd really hate to spoil them with a lighter clutch.

98Aggie

iTrader: (19)

This car is destin for road course and Texas mile events not 1/4 mile.

allngn_c5

iTrader: (3)

Thanks for the response Pat. Now whats your thoughts on heads? How much of a pickup could the owner see with a good set of aftermarket heads?

Patrick G

iTrader: (14)

Hard to say because the cam was custom-tailored for the airflow of the stock 243 heads. Most top quality aftermarket heads gain more on the exhaust side than they do the intake. The ideal cam with TFS 225 heads (for example) would have less split between the intake and exhaust duration. LSA and advance would be different too.

PewterScreaminMach

iTrader: (7)

Wow, those are some impressive numbers.