[John McGraw]

Well, I got the Chevelle wagon on the road last week and got it to the tuners today. Here is one of the pulls on the dyno after some tuning.

http://img.villagephotos.com/p/2003-8/339303/IMG_0645.JPG

It made better horsepower, but at the expense of mid-range torque, so we went for the best torque. The hp numbers also kept rising almost all the way to 7000 rpm, but we set the rev limiter at 6500 and set all shift points at 6000. There is just no reason to twist a daily driver any higher. These numbers are SAE corrected rear wheel numbers, so the little L76 is probably making about 480 or better at the crank. Not bad for a grocery getter.

The engine is a L76 that has had all the displacement on demand crap removed and a mild cam installed. This engine only made 361 flywheel hp in stock trim. The trans is a bone stock 6L80E 6 speed automatic.

http://img.villagephotos.com/p/2003-8/339303/2153150


Regards, John McGraw

 

[-SS454-]

With a 6 speed automatic I'd say you're making a fair bit more than 480 bhp. I think you've got at least 520 at the flywheel.

 

[pist0lpete]

Assuming you have some good valvesprings on the engine you need to go ahead and let that baby rev. You aren't gonna hurt any gen IV engine revving it to 6800 or 7000 even. The same basic engine has a 6800 rpm rev limiter in a corvette with stock valvesprings. Just something to think about. Either way those are some nice numbers!

 

[buddyholly]

John, Great looking car, great job. What cam are you running? I am also running a L76 but with a T56 Magnum 6 speed manual. I have not had mine on a dyno but street tuned. With my cam Livernosis estimated my motor at 525hp at the crank which is about right with how it runs on the street. Shame the L76's are drying up already since you could get a good deal on them compared to the LS3's, and the DoD is easy to remove if you are swapping a cam anyway.

 

[John McGraw]

I am running the livernois stage 1 cam.



Regards, John McGraw

 

[buddyholly]

Cool, I am also running the Livernois Stage 1. How is the 6l80e working? I don't think there are any of those running around in Chevelles yet though I know some people are working on them...