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c3 supercharged question

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Old Oct 24, 2010 | 04:25 PM
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stoney500's Avatar
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Default c3 supercharged question

I am building a 355 sbc and a V1-T trim Vortech supercharger I fit under the hood (lots of mods to make it fit). Anyway, I am going with a blow through carb versus fuel injection and wondering if a 750 cfm Holley blow through carb is too much for my 355 ci engine.

Edelbrock performer rpm heads(70cc) Comp nitrous cam 8 1/2:1 forged pistons(je) 4150 crank 4150 h-beam rods. Intake is still up in the air I'm leaning toward Victor jr.
Any input would be helpful. Thanks.
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Old Oct 24, 2010 | 05:21 PM
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Don't know what use this will be to you but my 71 has a supercharger and I just put a new holley 700 cfm blower carb on it. Doing the calculations my setup (350ci with 4-71 blower) required the 700 cfm carb.
http://www.holley.com/applications/C...bSelection.asp
http://www.holley.com/data/TechServi...Carburetor.pdf
Here is the nitty gritty manual calculator that figures in boost and all.. Look at page 7
http://www.holley.com/data/TechServi...ech%20Info.pdf

I figured mine as a 350 with a redline of 6000 rpm.. it calls for about a 600 cfm carb.. But since it is supercharged holley tech help told me to go with the 700 blower carb.

Hope that helps!
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Old Oct 24, 2010 | 05:26 PM
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Edelbrock RPM heads will choke that motor. They barely work on my mild 355. Power is all about airflow. I would look into some AFR 210's for that engine. Some may say that 210's are too big but the supercharger changes all the rules.
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Old Jan 16, 2011 | 08:20 PM
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I am putting a Vortech blow thru on my 1968 with 355. What hood did you get to fit your install?

Mike
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