Ls1 Hp
02-18-2008, 08:32 AM
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Ls1 Hp I have a book that says my 98 Z28 LS1 has 305 hp... I got my hands on a LS1 out of a 99 SS rated at 320 hp ... Now, i know that Chevy will lie about hp but the very same book says that these ENGs have the same cam so where does the extra hp come from ???? It better not be from the hood..LOL
02-18-2008, 09:11 AM
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the LS1 motor is underrated from the factory, depends on the car its in basically is the number you will see, as you have noticed.
To not cause a complete ruckus heres your basic truth:
The LS1 in a Z28 and SS are the exact same engine nothing different.
"Ramair doesnt really account for much unless your going really fast"
that being said how else could anyone ever think to market a spoiler, rim package, and hood package without changing a horsepower number? wise choice chevy fooled many.
Only big diff I would see is an SLP optioned SS
in a nutshell numbers sell. absolutely no real noticeable horsepower difference. But congrats on crankin out 190,000 miles on your Z28
To not cause a complete ruckus heres your basic truth:
The LS1 in a Z28 and SS are the exact same engine nothing different.
"Ramair doesnt really account for much unless your going really fast"
that being said how else could anyone ever think to market a spoiler, rim package, and hood package without changing a horsepower number? wise choice chevy fooled many.
Only big diff I would see is an SLP optioned SS
in a nutshell numbers sell. absolutely no real noticeable horsepower difference. But congrats on crankin out 190,000 miles on your Z28
02-18-2008, 09:23 AM
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the SS got a slightly better exhaust didn't it?
that could account for some of the "advertised" hp increase.
but basically it was attributed to the hood and exhaust...
that could account for some of the "advertised" hp increase.
but basically it was attributed to the hood and exhaust...
02-18-2008, 09:29 AM
#5
All LS1 engines are just like Americans ... they were all created equal ... the HP numbers published by GM are BS...just figure that all of them are 350 HP ... not that that realy means anything anyway .. 
Last edited by slt200mph; 02-19-2008 at 09:19 AM.
now to sit and wait for the diehard SS guys to come in Trending Topics
02-18-2008, 03:06 PM
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hello, its my understanding that SLP upgraded the exhaust (catback), air lid and suspension plus body parts (and possibly gears). i have the book standard catalog of camaro or you could just call SLP. thx dan
02-18-2008, 04:38 PM
#10
Phuch the slp book all LS1s are the phuchin same ... end of story ... I work for Chevy..
PS Ed Hamberger (owner of slp) is an old drag racing buddy.
It was bound to happen I was wondering when the ss dumb squad was going to show up.
I work for Chevy..PS Ed Hamberger (owner of slp) is an old drag racing buddy.
It was bound to happen I was wondering when the ss dumb squad was going to show up.
Last edited by slt200mph; 02-18-2008 at 04:48 PM.
02-18-2008, 05:22 PM
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yes they may be the same engines, but no two engines will produce the same numbers....its all an average....a very tight average at that. it is however believed that ls1 engines are very underated...by as much as 40-50 hp
02-18-2008, 07:08 PM
#15
You mean my SS doesn't have 15 more HP than a Z28?
I thought only ricers got extra HP from hoods and spoilers?
From Mass Air Meter to the Converters, every F-Body LS1 is the same (within it's model year). True, Air boxes, a Ram Air hood and a different muffler might give a 3-5 HP edge, but nothing that is outside the range of dyno repeatability.
Hell, I'd be suprised to see much more than than on even the 345HP SLP optioned cars.
I thought only ricers got extra HP from hoods and spoilers?
From Mass Air Meter to the Converters, every F-Body LS1 is the same (within it's model year). True, Air boxes, a Ram Air hood and a different muffler might give a 3-5 HP edge, but nothing that is outside the range of dyno repeatability.
Hell, I'd be suprised to see much more than than on even the 345HP SLP optioned cars.
02-18-2008, 07:22 PM
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Im going to agree that Z28 vs SS the power is the same.....UNLESS...it had substantial SLP power items?...I dont know how many options there were, but for instance in my case it came with SLP dual dual exhaust, I am assuming worth a couple horses, but nothing to mark it as 15hp better. Like said earlier...dont worry about it. Just mod away..
02-18-2008, 07:33 PM
#17
The war between a Z28 and a SS.
I bet the Z28 would be 0.0000000000000000009 slower in the 1/4 mile because the Z28 emblem is bigger, therefore it weighs more.
Engines are the same, basically everything is the same.
Its kind of like the Firebird WS6 and the Firebird Trans Am, same motors.
I bet the Z28 would be 0.0000000000000000009 slower in the 1/4 mile because the Z28 emblem is bigger, therefore it weighs more.
Engines are the same, basically everything is the same.
Its kind of like the Firebird WS6 and the Firebird Trans Am, same motors.
