What’s my pulley combo?

As you guys know I’m new to the group and Have never had anything with a supercharger is Turbo. I have done some research and it seems that my current pulley (BilletFlow) 2.760 should be giving me more that 11PSI of boost. Unless it has a Lower pulley? I was hoping to get it around 15-16PSI. What size lower pulley should be on it now and what should I change it to for more boost?? Please correct me if I’m way off base.

Are you on a stock eaton?

Yes sir stock Eaton

I think the general consensus is not to go beyond the 2.76 with a stock blower. Usually the lowers come into play with the ported blowers. Otherwise things can get hot pretty quick.

Aren’t people running 14-15lbs on a stock Eaton?

I'm just saying on the pulley size. I have a 2.8 on mine and see about 12psi last I checked. What gauge are you using for boost? Are you sure you don't have belt slip?

No I’m not exactly sure. I just got the car and I’m still trying to figure things out. I have an autometer boost gauge.

For what it’s worth, my 2.80” upper only, non ported, catless car made 13.8psi. 15 psi will be too much for the ole Heaton, you’ll probably make one flying pass then be immediately heat soaked after that till she cools off.


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Some links from my Terminator FAQs for you to browse. There are others if you want to look through the list on my site.

Heat Soak

Why Does Boost Fluctuate With A Pulley Mod