I just got through putting some underdrive pulleys on my 92 305 TBI. I bought the race underdrive ones, which are even smaller than the regular underdrive ones. I can really feel the difference. I ran a stoplight-to-stoplight that I normally run to see how the car is running. Normally I can get to 80 a little after passing the second light, but now I got to 80 about 80 feet before the light. I even had a friend in the car with me this time. The only thing is that the Ammeter on the dash goes way down when I idle and goes back to normal when I hit the gas. Has anybody else put these on their car and are they satisfied with the results?

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1975 Firebird - Pontiac 350, TH350, 27k original miles, rustbucket, ongoing resto project

1992 Firebird - 305 TBI, 700R4, sport appearance package, t-tops, flaming red, 84k miles, soon to be modified

 

The drop in the meter is expected as the alternator isn't spinning as fast anymore. You can get a pulley for the alternator to fix that issue.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

I did get the alternator pulley. I got both the crank and the alternator pulley when I bought them.

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1975 Firebird - Pontiac 350, TH350, 27k original miles, rustbucket, ongoing resto project

1992 Firebird - 305 TBI, 700R4, sport appearance package, t-tops, flaming red, 89k miles, Weiand 360 air cleaner assembly, CAT Power Engine Parts race underdrive pulleys, more to come....

[This message has been edited by 75/92 Birdman (edited October 18, 2001).]