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I have turbo H22 in a 92 Civic. Got some bad advice from a So Cal engine builder who built my shortblock. They claimed that 10:1 compression and 20 lbs. of boost on pump gas wasn't a problem. Everyone I talked to in Portland, OR says-no way.
I have a 10:1 eng., Arias, Crower rods, Darton sleeves, JG head, Garrett GT 30, Hondata S 100, Pro drive pump gears, Blitz id controller, Tial 46mm wastegate, Revhard header, 3" exh. from header out, stock H22 cams. large intercooler, MSD 6 ignition and coil, Fluidyne radiator, Tilton dual disc clutch & fwhl.,700 injectors, Golden Eagle int., Walbro 255, etc., etc.
The car is setup to run at 10 and 16 lbs. boost at 12.1 to 11.8 afr, around 14 degrees advance and dynos out to 290s and 401whp. I'm using straight 113 octane race gas. The car is garaged and driven only on clear days. (a toy) It weighs 2320 lbs.

I recently found a supplier who makes a 5 layer headgasket that will lower compression to 9.4:1. Any ideas on how much boost I might be able to run on pump gas. (ran 8psi on pump gas previously) With 100% 113 octane race gas, how much boost would be realistic as a max?

Would S cams make more power and still retain streetability?

Dyno runs were made on both Dynojet and Mustang dynos. Do the whp figures seem ok?

Would running a Fluidampr harmonic balancer be helpful?

Any experience with Evans coolant? (boils at 350)

Any other suggestions?

Thanks




Modified by purpleh22 at 9:11 AM 1/13/2006

 

Any replies on max boost range with pump or 113 octane and 9.4:1 compression?