I switched from the 0.81 to 0.68 and like the 0.68.
Boost comes on about 300 rpms sooner with the 0.68, which makes the combo feel much more "lively".
The 0.68 housing was only $65 new (IIRC), and I think it was one of the best mods I have done on my car.
If you are looking for the most top end, then get the 0.81 or 0.96; however, if you want more street fun and still good power then I would recommend the 0.68.
They are so cheap, you should probably try different ones to decide which is best for you.
1990 Mustang GT, Explorer shortblock with DSS MSS, Edelbrock Performer RPM heads, stock GT cam with 1.72RR, ported Explorer intake and 65mm TB, PTK T66 kit @ 18psi, AEM EMS + WBO2, Alkycontrol methanol injection: All Sold
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Last edited by Cld12pk2go; 01-08-2006 at 04:09 PM.