Jump to content
Forums Gone... but not forgotten!
Pontiac of the Month

wtjosaas' 1970 Firebird

2018 July
of the Month

  • Welcome to Forever Pontiac

    Welcome to Forever Pontiac, full of great ideas for Pontiac performance, maintenance, or for peer-to-peer assistance from Professional and DIY mechanics. Also, compete in our Pontiac monthly competitions. Please register if you'd like to take part.

Sign in to follow this  
CraiGM

Supercharged Grand Am Dyno

Recommended Posts

So it managed 208.6whp and I am fine with that. I was hoping to be over 200whp. My high hopes were 220whp so almost landed in the middle. Tuner says thats about 253-257hp to the crank. Thats over 100hp gain from the factory. I am well happy with that.


/>http://www.youtube.com/watch?v=hId8bRWb8Zs


/>http://www.youtube.com/watch?v=og8yorScHyM

Here are the dyno sheets he gave me. The first one is horsepower and torque. Now this is interesting. After tuning, he found some issues. One major one was the METH KIT. He did one run with the meth on (red line) and one run with the meth off (blue line.) Look at the difference. Its like 40hp difference! I guess this supercharger just doesnt get hot enough. IATs were 180 degrees without the meth.

2d96ahe.jpg

This second pic shows my afr and its more steady than before the meth. 1-2 degrees of knock here or there, leans out just a little at top end, and adjusted timing. Says the car is a lot faster now. We'll see I guess.

2laub2r.jpg

Share this post


Link to post
Share on other sites

Tired of these Ads? Register Today!

Like I said on GAGT.com, excellent numbers.

Share this post


Link to post
Share on other sites

100 hp over stock is impressive! :dancingpontiac:

Share this post


Link to post
Share on other sites

Very nice job! That is a very excellent gain

Share this post


Link to post
Share on other sites

Nice #s man.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

Tired of these Ads? Purchase Enhanced Membership today to remove them!
×

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.