Thread: What size pulley is "TO SMALL"????

When I had the 1.84rr, SLP headers, stock L32 heads, and L26 bottom, I was getting 16 psi on a 3.25 pulley. I think my M90 is a Magnusson though, it has a keyway with a single bolt on the end to hold on the pulley. It's shaped like a Gen III, but the rotor coating is perfect. It would really scream. Can't say it was safe, think previous owner was also using Meth, but didn't tell me about it. But that's the PSI I was getting from the 3.25. The extra compression is the only restriction I could think of.

Originally Posted by RegalGS98s

When I had the 1.84rr, SLP headers, stock L32 heads, and L26 bottom, I was getting 16 psi on a 3.25 pulley. I think my M90 is a Magnusson though, it has a keyway with a single bolt on the end to hold on the pulley. It's shaped like a Gen III, but the rotor coating is perfect. It would really scream. Can't say it was safe, think previous owner was also using Meth, but didn't tell me about it. But that's the PSI I was getting from the 3.25. The extra compression is the only restriction I could think of.

And it wasn't knocking on high compression? With just rockers and headers...even with Methanol...wow.

And 16psi...yeah, that's nutzo