'Trust'

iTrader: (24)

No accessories is what kills it for me, hook those up and they are right... run of the mill LS1.

bjamick

iTrader: (31)

Well pretty much all the car had HP wise was the LT's bc the LS6 intake is a must bc it came on the later years anyways. So i see 400 as a pretty stout motor. Usually stock our cars come with i believe is 345 FWHP so he picked up 55 HP somewhere. But that might be 25 for header and maybe some freed up HP from the pullies, and it prob had a very aggresive tune in it.

ls1charged

iTrader: (8)

so when they advertise the f bodies at 345 hp, they really do knock that way down just so they can sell more vettes.

LS1>girlfriend

iTrader: (19)

wow ls1 owners really are a different breed! if that would of been an import mag and a 4g63t that made 300 at the fly every single owner would swear up and down the motor made 300WHP. but u guys are trying to find ways to call bullshit...its an engine dyno, and they are finding out the hp of the engine, just the engine! not the engine with bolt ons, a full exhaust system, or in an f-body just the engine! then they put on a fast 90, slid in an ms4 and bolted on stage 1 ls6 heads. it was cool to read


EDIT: after the ms4 went in the peak went to 482@6400
after the ms4 and prc stage 1 ls6 heads they got 529.5@6600
the final run was with ms4, ls6 heads and fast 90/90 setup 551@6600

all runs were done with VP 101 unleaded, headers were kooks 1.875" 35" primaries with 8" collectors for dyno clearance. all runs were recorded once the engine reached 165*. done at 77*F, barometric pressure was 29.23inches of mercury, 3200 feet above sea level

Muerte_X

iTrader: (1)

400hp at the flywheel for an LS1 w/headers and a tune(?) sounds about right from other engine dyno's I've seen/read about. Not really "stock" but "stock motor" in the same way most everyone on this site means when they say "stock motor"

green28

iTrader: (8)

So take the 400 and lets say the motor was in an A4 car with 20% drivetrain loss. Then you are looking at 320 rwhp which is about right for an auto car with headers.

bjamick

iTrader: (31)

my car with stall, LT's, lid, K&N with the TC locked i only put down 306 and this was untuned but i dont think ill pick up that much just from a tune.
(responding to the aboce post.)

stokedporcupine

yeah really, i'm not sure whats so amazing about these numbers. they seem to fall perfectly in line with what everyone here already knows. now if the motor would have still been hooked up to a full stock exhaust w/ all the accessories on it, then i'd think 400 fwhp was great.

the only way these numbers would be unexpected is if you actually believed the bullshit hp ratings GM gave the F-body ls1's.

stokedporcupine

thats because we dont have any need to bullshit about our motor unlike the guys sporting the sub-200 hp I4's...

and now that you mention it, i can't wait for the import mags to strap a new 198 hp civic SI motor to an engine dyno w/ no accessories and a header and some huge intake and claim a "stock" SI's motor really makes 300 rwhp then i'll have to listen to all the civic kids tell me how the SI really makes 300 hp...

SilverStang00

iTrader: (2)

Exactly, this doesn't seem strange to me. Factor in the accessories, headers, injectors, intake, and tune and the rwhp #s would be what you would expect. Nothing I didnt already know.

LilSlo1

iTrader: (3)

Keep in mind guys that most engine dynos have a correction factor. Some are more realistic and some are more eye candy bullshit than others.

greysteel_M6

iTrader: (5)

I think that could be an allusion to the high possiblility the test was performed on an aggressive tune. "Stock ls1" -That's very misleading.

00454sscamaro

it said they used the vp to make sure there was no engine knock going on to mess with the tunning/ or hp output....

greysteel_M6

iTrader: (5)

Which also allows for a more aggressive tuning before detonation occurs.

Muerte_X

iTrader: (1)

My car with a lid, cutout, free mods, and an unlocked 3800 converter put down 302whp. I think you have a lot to pick up from a tune. If I don't make at least 320-330whp with headers, I'll be pissed.

300bhp/ton

They are nice numbers, but serioulsy they mean almost nothing in the real world.

Firstly:

The engine is NOT stock, no exhaust, no cats and LT's can make a serious difference as can the LS6 intake on a pre 01 Ls1. Remember the 97-00 Ls1's had a more agressive camshaft.

Second:

Are the numbers FULLY SAE Net corrected, accounting for every standard that manufacturers have to apply to? And also was it the same type of dyno, exactly the same? Because if not it could easily sway the results by 10hp or more.

drews94z-28

iTrader: (4)

i love how its exactly 400 too, not 399 or even 398, dyno numbers can be manipulated to be a version of the truth, but none the less we all know our LS1s arent too shabby or we prolly wouldnt be on LS1tech.com would we

98Zheadsncam

iTrader: (26)

I just figured I'd bring this thread back for the hell of it. I actually live right down the street from sunset racecraft, and I can say with certainty that there is no way that motor made an ACTUAL 400hp that day. We are at 3300ft of elevation here in Lubbock, tx, and it saps some power. The numbers were undoubtedly corrected, but how much is anyone's guess. Oh well, as we all know, dyno numbers, FW or RW, don't matter much...it's all about what the car runs. Still, people need to mention elevation more often when referring to specific dyno tests. It plays such a big part in making power. Anyway, that's my two cents.

RPM WS6

iTrader: (3)

Very old thread, but I still find the numbers interesting.

Everyone here is bitching about the headers, lack of accessories, lack of an air box, lack of a full exhaust system, and aggressive state of tuning. I guess those would be real concerns *IF* someone was trying to pass those numbers off as being an SAE Net figure under the same testing standards as GM used for their original rating of the '97+ LS1s. But I don't see that as the case at all.

Headers, no exhaust, no accessories, no air cleaner, and aggressive tuning was the standard format that engines were tested under during the SAE Gross rating years of 1971 and before. So what's interesting here is that you can use this "400hp" figure as a reference when you're comparing HP ratings from old SAE Gross rated muscle cars against the modern LS1.

metalmilitia606

iTrader: (8)

I believe it. I have seen stock cars floating around on here time to time putting down 310-320 to the wheels. I could easily see with an exhaust and out of the car making 400. Especially, with a LS6 intake on it.