Thread: 78 Trans Am getting some love

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Originally Posted by 53 Chevy5

I guess the best way to describe it is the 4 barrel had a lot of howl but no go.

Do you have the stock mufflers on it?

Originally Posted by 36 sedan

Do you have the stock mufflers on it?

No, it has some brand of turbo mufflers on it. I replaced the carb base gasket and that seemed to help the vacuum to shake around 13 , still a bit low I think. I have 9 at idle, and 39 total , not quite sure of the rpms cause I couldn't see the tack, it sounded like around 4ish. The part that I think is not right is when I hook it to manifold vacuum the timing goes all the way to 34, that seems like a lot. I moved the line to port vacuum now. The carb base gasket may have helped a fair amount, the A/C doesn't seem to bother it quite as bad and now when It's pulling hard I feel it surging a bit so I'm wondering if my fuel pump is getting weak. Here is a link of me running it, turn the volume up.I will check out the tuning link you gave me. https://www.youtube.com/watch?v=EahCVj8TEMI