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COSMO · 09-14-2014, 08:33 PM

I was able to pull 500whp at 9psi on 93oct, same gtm Stage II. Also ported the miscut gtm exhaust manifolds to a true 2" outlet. Oh and I'm at sea level.. I could see those numbers maybe on e85 but 91oct, nah...

09-14-2014, 08:33 PM	#16 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	I was able to pull 500whp at 9psi on 93oct, same gtm Stage II. Also ported the miscut gtm exhaust manifolds to a true 2" outlet. Oh and I'm at sea level.. I could see those numbers maybe on e85 but 91oct, nah...