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Old 04-21-2008, 07:02 PM
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Blowers, 177 VS 174 E85 and other questions

Hey Everyeone,

I have been thinking of putting a blower on my Chevy 383
All forged
XE 274H Cam
9.3 Compression
Predator Carb
Quench is .037
Pro topline Vortec heads

I had a few questions before I go any further. Whats the difference between the 174 and 177 blowers? Is one better than the other? Since my compression is so High I was planning on running E85 with 4-6oz per 10 gallons of Mystery oil for some lube and anti corrosion properties. Would I be able to get 6-8 psi with this set up? My understanding is E85 will also run cooler than gas.

Thanks
Jordon

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Old 04-21-2008, 07:55 PM
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Blown 383

The difference between the two is blower size as it relates to displacement.A 177 will flow more air,and I recommend running that size for your 383.You can run 6 to 8lbs of boost if it doesn't detonate.However I would run about 5 or 6lbs on gas.I don't know much about E85 except you can't get it in CA unless you drive a commercial vehicle,and stations are few and far between.
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Old 04-21-2008, 07:59 PM
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Yeah E85 will cool things down... Much harder to detonate it, it will need to burn more of it for the same power. jetting/accel pump etc will need proper adjustment. turbomustangs.com has an "article" on the fuels use with turbo's. Concepts should be similiar. With premium fuel and proper tunning you should be fine with 9.3 compression and 6-8 psi, but like mention above, pulley the boost down if you get detonation. I'm not totally sure on the 177-174 differences.. I would agree the airflow to rpm of the the supercharger would be better with the 177 for your engine. 383's a decent sized engine for that size of supercharge.. tho I'm not an expert on those "weilands" etc.

Superchargers, turbos, ie boosted engines like different cams then NA engines do for best performance. If you want the most out of it I would research it on turbomustangs.com myself.. kinda like that site myself.. helped me get my v8 twin turbocharged for less than 1500. Took me a while to get the parts but had it up to over 8psi.. needs more tlc and tunning
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Old 04-21-2008, 08:03 PM
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Forgot to mention E85 can cause some problems with some fuel system components.. Alcohol compatible fuel system components are recommended by me. You could be just fine.. might be worth thinking about tho.
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Old 04-21-2008, 08:06 PM
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Water/Methanol Injection will also allow you to run lots of boost with a high compression ratio on pump gas (92+) without detonation, requiring little or no power robbing spark retard. A good alternative to E85 or high octane race gas.
I'd go with the Weiand 177CID blower.

http://www.snowperformance.net/
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