MikeWS6

98-02 WS6 and SS models were all rated right around 320-325 horse power. My question is what should they have been rated at the flywheel. Some people argue the rating is close because the trans if very good at getting power to the wheels, and a 12% loss should be used. Others say the ls1 is very underrated and a 15% loss should be considered.

Lets say the average LS1 puts down 300 horse power

300rwh 12% loss=340 fly
300rwh 15% loss= 352 fly

I even saw muscle mustang claim 321 at the rear wheels! Which is almost 380 at the motor.

black_phoenix

iTrader: (27)

in my case when completely stock, the ls1 made 380bhp... but commonly its 340 bhp...

MikeWS6

Wow. I understand each dyno is different but thats pretty good. What did u put down? 325ish?

MikeWS6

Beginning in 2001, the LS1 received the higher-flowing intake from the LS6 and a milder camshaft to keep power at the same level;

^^ From wiki.

Looks like the 01-02 cars did not make more power but were just rated higher.

allngn_c5

iTrader: (3)

My 2000 FRC had an ls1 turd in it. 300 rwhp 300 rwtq bone stock. Just my 2 cents.

MikeWS6

Thats around 340

scritch

iTrader: (1)

yea thats a pretty good estimate

allngn_c5

iTrader: (3)

Well then I want some $$$ back for being over rated by 5 bhp. LOL !!

krazy4

iTrader: (5)

My 02 Z28 M6 made 354whp with an slp lid, slp maf, and a cutout.

STOCK MANIFOLDS and CATS.

phoenix1987

iTrader: (3)

A buddy of mine put 308rwhp in his 99 vette bone stock.

Oso SS

iTrader: (3)

i put down exactly 309/309 stock through an auto 02 ss

primer84z

iTrader: (7)

The f-body LS1's should be rated at what their vette counterparts were rated at, 345 or 350. Look at the 04 GTO's, they were rated at 350 with the same engine.

MikeWS6

^^this

black_phoenix

iTrader: (27)

320 rwhp... i guess 370 bhp

zigroid

iTrader: (22)

I think you guys putting down 320 rwhp had happy dynos.

I was just at a dyno day, dyno is not happy or low, reads pretty accurate. my car is a 99 formula, bone stock with 132k miles. my friends car is an 02 vette, bone stock with 30k miles.



im the red run, hes the green run.

I have no idea why I have so much more low end torque than he does but the hp and tq numbers are still pretty close. I would say LS1s were all around 345-355 hp.

30th t/a

iTrader: (51)

I agree about the "Happy Dyno's"

The corvette rear takes more power to turn plus I think they have bigger rear wheels & tires and that will also eat up RWHP.

00FlowCamaro

I voted "not underrated" becuase I just wanted to see the results haha. Interesting to see the dyno numbers and such and to find out its that far underrated.

NemeSS

iTrader: (127)

i dynoed 316rwhp with about 3k miles on my 02 ss
it was at a local import place my cousin use to work at. they had a dyno day. dynoed for free. with stock filter
import fanboys expression 0_o

Blackhawk777

Mine stock dyno'd right about 310/325 with about 85k on it at the time.... I'm going with 350+

ponygt65

Assuming 300rwhp I'd say rate all LS1 (vette, GTO, Fbod, etc.) at 360bhp.

300/.85 = 355

However, there are tranny's to think about and most that Iv'e seen are just north of 300rwhp, so I think 360 would have been 'fair'. 350 FOR Sure