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Old 08-02-2010, 09:13 AM
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Need Advice On 327 Build

I have a 327 a friend gave me and would like to finally swap out my v6 in my 87 camaro for this. I would build a 350 or 383 but this engine is complete and free. It has:
The 350hp cam
11 or 12:1 high compression pistons
461 heads
Edelbrock intake

I plan on:
Swapping out the domed pistons for some flat tops so I can run it on pump gas
Swapping the 461's for some vortec heads w/ GMPP intake
Swapping out the cam for something more streetable.

My main question is what carb should I use for this? I want to put a procharger on shortly after it gets built but funds would determine when. I plan on building a Holley double pumper for a blow thru setup with the procharger. I figured a 750 should be plenty with the procharger but would it be too big without the procharger? I don't want to buy 2 carbs.

Also, how much power and torque should I expect this to make before and after the procharger?

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Old 08-02-2010, 09:56 AM
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carb choice

if NO charger is used then a 600cfm is enough.. more is over kill. i don't know of cfm's if u are using that kind of charger.
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Old 08-02-2010, 10:07 AM
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I forgot I have a good quadrajet that is currently a spare for my dirt track car. Maybe I'll just go with a quadrajet before the blower and then go for a 750 holley afterwards. Doing the math with the equation:
Carb CFM = [(C.I.D. x Max RPM) / 3456] * VE

Using:
VE = 110% with the blower
Max RPM = 7000

Gives me 728cfm.

I guess I answered my own question
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Old 08-02-2010, 10:19 AM
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Flat tops would be good naturally aspirated but if you're thinking of some boost in the future I would be careful. The vortec heads w/ flat tops will probably be too much compression when you add a blower. Yes, I would use the Q-jet if its street compatable with the rest of your build.
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Old 08-02-2010, 11:03 AM
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Well the engine will have a forged bottom end on it. I already have the flat top pistons on small journal rods so I was hoping to just pop the domed ones out and put the flat tops in. I have a set of 882's I could use with the blower. Would they be better? That would put my compression at 8.3 instead of 9.3 with the vortecs. I guess that would allow me to run more boost.

http://www.procharger.com/chevy_ratio.shtml

Last edited by enduro54; 08-02-2010 at 11:28 AM.
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