| 93 ragtop's new 385 LTX Engine - Dyno Results |
Subject: 93 ragtop's new 385 LTX Engine - Dyno Results by rklessdriver on 2013/1/9 15:46:27 In the D44 rebuild tech thread, I alluded to the fact that I was also building a new engine for my buddy Rich (93 ragtop) who absolutely grenaded his heads/cammed stock bottom end LT1 a few years ago. Specs on engine. 385 Gen II LTX. GM block fitted w/Eagle 4 bolt billet splayed main caps Compression ratio - 11.3 SCR Scat Crankshaft 3.75" stroke 4340 Forged crank Scat Rods 6" length 4340 Forged I Beam Ross Pistons 4.040" bore 2618 Forged flat top 2 eyebrow Perfect Circle Rings 1/16 1/16 3/16 moly top, napier second, std tension oil PN315-0036 AFR Cyl Heads 210cc Eliminator Street Port PN-1057 GM LT4 Intake Manifold - ported by rklessdriver Holley TB 58mm (Mike) Jones Cam Designs camshaft EHR72360/73360 280/284 Advertised 232/236 @ .050 .360/.360 (.593 w/1.65) 108 ICL 112LSA GM LS7 roller lifters Scorpion Rocker Arms 1.65 ratio Cloyes timing chain pn 9-3045 EM Headers 1 3/4" primary GM factory LT1 2 3/4"exhaust system w/Magnaflow axel back The car. 1993 Corvette Convertible GM 4L60 trans Vigilanti Stall Converter 3000RPM D44 IRS 3.73 gears and tuned posi by rklessdriver Dyno Sheet. 463RWHP and 398RWTQ. As you can see HP peaked at 6300RPM carried to 6600RPM and then the valve train gave up which is about what I expected given the aggressive camshaft lobes, high ratio rockers and the OTB AFR 8019 spring package.  Now these numbers are on E85 fuel - Which I was under the assumption was only going to be used for emissions testing as Rich lost his hook up for the smog testing... I did not build this engine to take advantage of E85 fuel. Kinda wish I had known - What I know now - When I was building it.... The tuner is working on the 93 octane tune as we speak and should be done by the end of the week... he said it would probally make about 440-ish RWHP on gasoline. That said these numbers are fantastic thru an automatic w/3000 stall converter. This car should be very fast. Will |
