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08-31-2003, 12:50 PM
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#1 |
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Registered User
Join Date: Nov 2002
Location: Toronto, Ontario
Posts: 85
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Quadrajet
Anyone know what a stock Quadrajet M4MC/E4ME on a 1986 truck will flow in terms of CFM?
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86 GMC C15 swb. 350/TH350, fully loaded, but wish I had overdrive! |
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08-31-2003, 07:50 PM
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#2 |
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Registered User
Join Date: Feb 2003
Location: Mont Belvieu, TX
Posts: 852
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I am pretty sure it is 795, but don't quote me on that.
I just bought an Edelbrock replacement q-jet, and that is what it flows.
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Chris '92 ext. cab s/b 4.3L "Sparky" '04 crew cab 2500 4x4 6.0L |
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09-01-2003, 01:53 AM
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#3 | |
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Registered User
Join Date: May 2003
Location: Lake Oswego, Oregon
Posts: 1,028
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Quote:
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Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3 |
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09-01-2003, 08:49 AM
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#4 |
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You get what you pay for
 
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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Factory stock Rochester Q-jets are capable of 750 cfm, but you need to make sure the secondary air valves open all the way to 90 degrees. A lot of them are setup to control the cfm by limiting how far it opens. It is very easily fixed, but you will need to change the secondary metering rods when you do. If you leave the stock rods, it will fall on it's face when you stomp it.
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Mike 1985 Chevy C-10 |
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09-12-2003, 10:54 PM
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#5 |
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Registered User
Join Date: Nov 2002
Location: Toronto, Ontario
Posts: 85
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Thanks for the input, much appreciated. Swervin I read the stuff on your site about Q-jets. Sounds like Rochester Q-jets are getting forgotten by GM, something I'm familiar with from other manufacturers in my trade. Oh well, I'll just have to save up for a Holley of some sort.
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86 GMC C15 swb. 350/TH350, fully loaded, but wish I had overdrive! |
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