For those interested: Dyno results for stock 96 LT1

[tobijohn]

Just an FYI for anyone who might be curious:

96 LT1 auto, 61K, stock - at the wheels 253.69 max HP, 281.48 max torque. The printout was a little on the primative side but it looked like the HP peaked around 5200rpm and the TQ around 4200 RPM. If my math is correct this would mean 317/352 at the flywheel...

 

[steve1ph]

kinda low or not

what was the car rated at? seems kinda low. its just that i think all corvetts should be the fastest, short of a viper on up. they are they the most loved as should they be the fastest and feared. according to my 2 cents.

 

[tobijohn]

Well, the guys who ran the dyno said those were pretty good numbers. According the the Performance data here the stock 1996 LT1 was rated at 300hp @ 5000 and 335 @ 3600 at the flywheel so I guess mine was actually a little higher. Go figure...

 

[92ghost]

From what I've heard those are actually pretty good numbers. 245 HP from an automatic LT1 equates to 300 HP at the flywheel and this is show room stock. This equates to roughly 18% loss through the drive train. Your 17 HP (at the fly wheel) above stock numbers. Either you have some mods done to the engine, or if you are stock, then what I hear about the LT1 type engines gaining HP as they break in is true...

Wayne

 

[Mad-Mic]

Either you have some mods done to the engine, or if you are stock, then what I hear about the LT1 type engines gaining HP as they break in is true...

Wayne

out of all the LT1's GM ever made you will get the general bell curve easily. some not as strong and others stronger than they should be.

Popular Hot Rod magazine did an article over a good length of time on a 93 Z/28 and came to that same conclusion. after 50k in miles it dynoed stronger than when it had 3k in miles on the motor. my guess is because the tolerances on a factory built motor is alot tighter on the LT1's and it takes longer than the average 1k-3k to break in and even more longer for the motor to loosen up where it spins more freely as it should.

in the pro classes in NHRA these motor tolerances are very loose believe it or not. they are built this way so there is no need to break in a motor after piston changes if need be. the rings are sealing as the engine heat comes up. i would think 80's technology on engine management and the theory was finally adapted for factory performance.

just my 2 cents worth.....

BTW good numbers!

 

[tobijohn]

Well, maybe I lucked out on this particular LT1. On the other hand, I've subsequently been told that %17 slippage is a more accurate figure to use when trying to calculate flywheel HP/TQ. If that's the case, then my engine is very close to the stock numbers it's rated at...

 

[firedawg]

got a question for anyone who will answer... Where would I look to get a dyno test done, and how much do they normally run, I live in a small town, but not too far from cities. I would like to get one done before I do any mods. Any help would be greatly appreciated

 

[Edmond]

got a question for anyone who will answer... Where would I look to get a dyno test done, and how much do they normally run, I live in a small town, but not too far from cities. I would like to get one done before I do any mods. Any help would be greatly appreciated

You can get them done anywhere from some auto shows to high performance shops. They charge anywhere from $25 a "pull" to an hourly rate.

 

[WhalePirot]

paid $65/3

three runs, that is.

BUT, the guy did not calibrate between the car before nor between any of 'my' runs, so I am told the numbers are suspect. They are also lower than what is felt and expected and what was predicted.

 

[firedawg]

Thanks, I'll check into that!

 

[Mad-Mic]

Thanks, I'll check into that!

firedawg i don't know if you got my PM or not but some of us are going to dyno our cars one day next monthl. we are getting a deal since there will be atleast 10 cars there.

read this post and reply if you are interested!

http://www.corvetteactioncenter.com/forums/showthread.php?s=&threadid=37685

 

[steve1ph]

dyno day

hey mad-mic, here in the dallas area you can go to speedtek and get 3 pulls on "dyno day" for 35 bucks. im going after i get a chip burned. you can find speedtek at speedtek.net for i guess a location near you. for what they charge for performance parts i should get somthing free for that plug.