LS1 HP Ratings
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Staging Lane
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From: Colorado Springs, CO
LS1 HP Ratings Are LS1 F-body and corvette HP ratings net or gross (flywheel)? If net, I would expect the rear hp dyno values to be close to the advertised HP. That seems to be the case since if i recall correctly, most 4th Gen LS1 F-Bodies dyno stock close to 300 RHP. If net, then what would the pre-1971 equivalent flywheel HP be? Thanks.
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Originally Posted by dwhiteZ28
Then how is "net" defined, i.e. is it equivalent to dyno HP or does it carry another definition? Thanks..
i read somewhere that if you used the old gross rating the ls1 would be around 400 hp.i would say this is pretty accurate seeing how most bone stock ls1 f-bodys run around mid 13 sec. at the strip.
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From: Northern Va
Originally Posted by 66deuce
i read somewhere that if you used the old gross rating the ls1 would be around 400 hp.i would say this is pretty accurate seeing how most bone stock ls1 f-bodys run around mid 13 sec. at the strip.
http://www.ncinternet.net/~durham/dynoshop.html
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Originally Posted by Black Z/28
You're right. Check out this web site where they dynoed a bunch of different Mustangs from the late 60s. It's Interesting (and funny) to see what the 'real' rwhp is on some of these 'muscle' cars.
http://www.ncinternet.net/~durham/dynoshop.html
http://www.ncinternet.net/~durham/dynoshop.html
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Staging Lane
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From: Colorado Springs, CO
Originally Posted by Black Z/28
Net is engine dyno with all the crap hooked up, i.e., belts, accessories, etc. Gross is engine bare naked. Then there's chassis dyno...
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From: Northern Va
Originally Posted by dwhiteZ28
Thanks..but then I ran across this entry in the Camaro White Book, page 43 which reads, "Horsepower ratings changed in 1971 from gross to net (output at the rear wheels, allowing for accessory and driveline losses." Now this sounds more like dyno RWHP. What gives?
There was a time when they rated the engines at the rear wheels... That didn't last long though, maybe 10 years.
For example, my 1978 Trans Am, with the 403 cid California engine, was rated at only 180 hp. But that thing would fly.
For example, my 1978 Trans Am, with the 403 cid California engine, was rated at only 180 hp. But that thing would fly.
