I know the Z28's were rated around 305 / 310 HP however I was informed that they really put out closer to 350 HP???

SS's were supposedly around 345 HP however they to really put out around 350 HP?

I have a 2001 Z28 with the LS6 Intake Manifold... Just how much is the engine REALLY putting out?

If I am really putting out 350 HP, then will a SSRA / Lid followed by Full Exhaust put me anywere near 400 HP?

 

there is no definative answer to your question. some cars dyno 285rwhp stock, which would put them at 320-330 crank hp. and others dynoed 315rwhp which would put them at 345-355 crank hp.

this varies from car to car, year to year, model to model, option to option, dyno to dyno.

but i would say the average hp that the ls1 actually put out was right around 330-340 crank hp. which i think is a little less than the ls1 equipped corvette and is probably due to slightly more restricted exhaust.


now a full exhaust...LT headers, no cats and the free-est flowing catback would probably gain you 25rwhp. the SSRA alone will yield minimal gains, particularly on a dyno since there isn't air being "rammed" into it. so at that point it functions as little more than a good cold air induction kit.

but with those 2 things combined...there is no way you'll get 400hp (even crank).

but honestly...your question has WAY too many variables to be answered with any real accuracy.

i say...go to a dyno...and find out for yourself

 

Around 350. Yes, closer.

http://web.camaross.com/forums/search.php

Ben T.

 

my 2002 SS M6 345 HP dynoed at 323 HP 333 TQ with 4000 miles on the clock

 

go hit the dyno......and find out...

my 99 SS made 308rwhp.. that was ok with me becuase the car was rated at 320hp

as I said ..dyno it


RWHP = rear wheel horse power = real world horse power

 

Most LS1 will dyno right at where the Vette's dyno at. Fbodies usually put down more to the wheels than a Vette does, because the Vette's IRS is more parasitic as far as drivetrain losses go than the fbodies 10-bolt is. An fbody dynoing 285rwhp is on the very low side, even for an automatic. Most are around the 300 mark, especially the 01s and 02s. These are all typical dynojet numbers.

I know of a guy that pulled a motor out of a wrecked z28. It was bone stock, and was put up on an engine dyno, where a heads an cam swap were going to be done down the road. The motor made over 350hp, but that was minus some engine accessories. Probably would have been right around 350 with all of the running gear on it.

 

I think with a full exhaust and an SSRA/Lid he should achieve close to 400 crank hp. I think it is possible he might add up with a tad over, especially with a good tune following the header install.

 

well...nobody said anything about a tune...or a lid for that matter.

but really...50hp from a SSRA, lid, headers, exhaust and tune...i think that's stretching it a little...i'd beleive 40 maybe.

 

Well 320rwhp/337rwtq out of a bone stock Z28 on mulitple pulls on RSI dyno in Houston.

Going to various dyno days you will see tons of variance btw car to car. Some cars make power others just dont. I personally like to take my dyno # and then hit the track. At the track I will get the cars weight and then get my MPH (if you drive well, get your ET.. ) then start tinkering with some decent calculators online. Often the numbers add up. If you have a 3600lb car and are going down the 1/4 at "y" mph you will have to make near "x" hp..

For me its always come out rather accurate.
13.1@108 with 2.0 60' times. So there is a 12.9-13.0 in there with a 1.9 on street tires possible. the 108mph shows that there is mph there to support those ets as well. so its just a matter of getting a near perfect run.

So, go to the dyno but on top of that, go to the track too.. and then gather all the data you want so you can play and have a decent idea of how much power you are making...

 

SLP seems to think it will get him close.

http://www.slponline.com/view_product.asp?P=28032

The only thing he won't have is the rocker arms and the mail order tune. I would say he will be close to, if not over 400hp at the crank. If he could pull 350rwhp with all of his mentioned mods, that should put him right about 400 crank hp.

 

How the hell does Hot Rod do their dynos? Are they doing it based on old school gross figures? I ask this because I remember them dynoing a crate ls1 and saying the thing had 412 hp or something. So, does this mean that ls1 camaros put out roughly the same hp to the ground as a big block chevelle back in the 60s/70s?

 

Hp, yes but not the torque.

 

They probably used the STD correction factory with the engine free from the drag of accessories.