LVTUNER

Went 458 HP and 423 TQ. Stock LS2 w/ LS2 intake & ported 90mm T.B., Hand ported 243 heads, milled .030", notched pistons and Precision 234 246 115 .625 lift camshaft. Dyno room was over 100 degrees. Dyno'd at Zippy Performance and tuned by LVTUNER in Las Vegas. It was pulling timing down to 25 degrees because of the 133 degree IAT's.

cowboyup

iTrader: (4)

Love me sum LS2 HCI!! Perfect street hunter!!

ranmas2004

iTrader: (1)

Why do the corvettes make such higher numbers with cam only than say Camaros, Trans Ams, GTOs? I've seen heads/cam LS2 corvettes well over 500whp. I have yet to see any other LS2 with a stock bottom end and all accessories (A/C, all belts) run 500whp. Corvettes have less drive train losses??

LVTUNER

The stick cars dyno better. This LS1 did 450 HP 433 TQ. and used the 228R cam and ported 241 LS1 heads milled .030". LS6 intake with ported Throttle body. Valve size is increased to 2.02 & 1.57. They need compression 11.3 to 11.5 to get the better numbers. The FAST intake would gain 20HP est and maybe under-drive pulley and electric water pump for a few more, that should be close to 500 HP.


HEY Thanks COWBOYUP!!

redgto4u

iTrader: (8)

The vettes seem to have a more efficient drivetrain. Is 25 degrees of timing common for a cammed ls2 with 243 heads?

Blackpanther99

iTrader: (8)

Nice!!

cowboyup

iTrader: (4)

You are 100% correct sir! Drive Train!! Corvettes have less drivetrain loss..
Less rotations mass from engine to rear. and Half shafts..

Vettes don't have a 10bolt or a 5in diameter steel drive shaft either..
I also think the differential is more efficient.. I think...

1970camaroRS

iTrader: (8)

It's actually the other way around. The trans-axle and axle shafts kill power! People used to talk about stock 6-speed 2000 SS Camaros out-dynoing stock 2000 6-speed base Corvettes.

Goosecaddy05

all i know is the vette has alot less loss than my car does... a c5 zo6 dynos anywhere from 345-360 stock rated at 405 hp, and my gen 1 cts-v with the same motor did 320 bone stock lol... so the vette is around 12-15% and my v is 20%... vettes dt loss look pretty good to me, or looking at it another way my dt loss is sad

JDMC5

iTrader: (3)

True story

LVTUNER

Its programmed for 28 degrees total for a cammed high compression LS2 with 243 heads. We are cooking out here in Las Vegas 105+ and the ECU will pull timing based on water temp 200+ and intake air temps 133+. The owner wanted to watch the dyno pulls and he drove it in hot off the street (25 degrees timing). It could have pulled a better number by waiting until the morning.