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Search took 0.00 seconds. Search: Posts Made By: mgarblik
Forum: Pontiac - Street 03-24-2023, 09:15 AM
Replies: 26
Views: 2,329
Posted By mgarblik
That gas mileage is pretty bad for sure. I had a...

That gas mileage is pretty bad for sure. I had a 66 2+2 421 HO that was basically stock with a 4-speed and 3.73:1 gear. The tri-power was very economical given the vehicle. I got 12-12.5 in city...
Forum: Pontiac - Street 03-23-2023, 04:40 PM
Replies: 26
Views: 2,329
Posted By mgarblik
I like vacuum and mechanical advance both on a...

I like vacuum and mechanical advance both on a street engine. The primary benefit in my experience is sharper light throttle response and better gas mileage, like 10-15%. As mentioned, at heavy...
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