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Author
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Topic: Supercharging and Compression ratio's????
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Beans
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Member # 5711
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Ok well letm e begain by introducing myslef my name is Billy but all my frined call me Beans. I am Building another 65-66 ford mustang coup like i had in high school when I find one. I am curently Building a small block 302 that will be bored and stroked to 354 cubic inches. I was planing on supercharging the motor. OK first off I was wondering what what a good compresion ratio would be to run? I have buld motor before but only build them mild and I want to build somthing with alot of horsepower but not to wild to where I coldn't drive the car on the street. SO if you can please give me some tips and or pointers on what cranks and rods and pistons that would be could for a supercharged motor and what compression ratio I Would need to run. Thanks In advance Beans
Posts: 32 | From: Livermore California | Registered: May 2005
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94gt
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Member # 3060
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one of the mags ran a modular with stock and then raised compression on a dyno and then did the same with a s/c on it, the difference was insane! the higher compression certantly made a lot more power... Ill try and find what issue it was and post it up later today ![[patriot]](graemlins/patriot.gif)
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2020 Explorer ST
2011 Silver Raptor 'Screw
Posts: 5777 | From: Beavercreek, OH | Registered: Jul 2003
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CDT
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Member # 5004
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posted
depends a lot on what supercharger you want to run.
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Custom Dyno Tuning
510.331.0608
Home of Flat Fee Tuning For All Cars, Trucks and SUV's, EFI & Carb, SCT, AFR, Dynatech, STS Turbos, N2O Refills
Posts: 1053 | From: Hayward | Registered: Nov 2004
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92stangLX
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Member # 3252
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It depends on how much boost you want to run and what you are trying to do with your setup (ie maximize power or reliability).
I would say somewhere between 8:1 and 9:1 would give you good reliability.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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Beans
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Member # 5711
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posted
OK yea I was thinking somewhere between 8:1 and 9:1 its will me a paxton novie 1200 probly pulling 10spi on a carberated motor. But yea if you can find that issue it will help me out alot I just need more info since I have never done a supercharged motor. Thanks in advance Beans.
Posts: 32 | From: Livermore California | Registered: May 2005
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CDT
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Member # 5004
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posted
I would say 9.1 with that blower
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Custom Dyno Tuning
510.331.0608
Home of Flat Fee Tuning For All Cars, Trucks and SUV's, EFI & Carb, SCT, AFR, Dynatech, STS Turbos, N2O Refills
Posts: 1053 | From: Hayward | Registered: Nov 2004
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need-a-cage
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Member # 5415
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The more compression the more power, but you have to run the right gas. If you want to run pump gas, don't go over 9:1. You will still have to retard the timing quite a bit.
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93 LX Hatch, Dart Big Bore 347, Edelbrock 6037's, Cobra intake, Tremec, S-trim, 60# injectors, Tweecer RT
10.84 @ 128.5mph
Posts: 606 | From: Santa Rosa | Registered: Mar 2005
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Beans
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Member # 5711
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posted
Yea me and my dad talked about it and yea we won't go more than 9:1 for that reason that we want to run it on pump gas. Thanks for the help guys. I was also wondering where I coudl get a ford racing block cheap too. thanks again Beans.
Posts: 32 | From: Livermore California | Registered: May 2005
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