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well anyone that builds for the TSM classes and such, will agree that the motors are alot better running, snappier, and spool a bigger turbo better with 9:1. Its pretty common practice to build a sout LC2 with 9:1 compression nowadays, and thats for 93 octane. It really does make them alot more fun to drive, and seem to run better. Now for straight E85, i would go 9.5:1 at a minimum. Closer to 9.75:1 would be ideal and would allow you to still run pump gas if you need to. If you do decide to run E85 with 8:1 compression, you will find absolutely horrible driveability and the economy will be in the toilet.
Gary
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87 Buick T-type WE-4,
6.0L LQ4 iron block LSx,
65# injectors, dual walbro 255s
HP Tuners 2-bar Speed Density EMS
224/224-112 cam,
4L80E, Fuddle 3200stall,
BW s475 turbo, 60mm wastegate,
9" rear 31 spline with spool, 3.07:1 gears,
11" rear disks,
TRZ Manual Rack and Pinion
full 4" exhaust with dynomax race bullets
650hp 585ft-lbs(crank)on 89 octane and no intercooler, 9.5psi-12 degrees timing
11.42@119-7psi
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