last chance to change turbos

[toomanymodz]

I've got a brand new 6765 billet wheel journal bearing turbo (.63 housing) and I'm debating about whether to run with it, or to sell it and buy one of the new 6266 CEA turbos instead. On the street I plan to run 20psi on 93 octane. At the track, 25psi on 110. I'm not sure if I'll be in the efficiency range of the 6765, since I've read it likes to see 28+ psi. Also my 3200 stall is on the low side, but having a stroker helps there. Any opinions? My heads are GN1's with the full CNC porting. The Champion intake has the full CNC port option as well. I really don't know what to expect with my combo (see sig), but I know that matching the turbo to the combo is critical.

 

[bison]

Spool should be similar with either. I'd think the 6765 could take you to 140+ seeing that the old cast 67p trim has been 139mph but that hasn't been proven tmk yet. There is a high probability the 66 ex will flow much more than the 62 compressor will flow at the pressure ratios you're looking to run but it hasn't been proven either. I wouldn't expect much difference in performance or spoolup at 25psi boost. The 9.5" converter is easily adusted.

 

[toomanymodz]

Thanks Bison. Sounds like I'll run with it then.