Summit Raceing Carb & Manifold
Thread Starter
Intermediate
Joined: Aug 2011
Posts: 28
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Summit Raceing Carb & Manifold
I was considering this for my 80 , anyone familiar this package .
http://www.summitracing.com/parts/CMB-03-0191/
http://www.summitracing.com/parts/CMB-03-0191/
Thread Starter
Intermediate
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Race Director
Joined: Apr 1999
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From: CORVETTE 77 385 C.I. TEXAS
Instructor
Joined: Sep 2011
Posts: 164
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From: Columbia South Carolina
have they fixed the problems of the original 4010/4011 carbs? i cant specifically remember WHAT it was but i put a 4011 onto a 79Z28 and despite tuning i could never get it to run right. i'm going to hold off on doing injection until i get the car safe to drive and running before i start modifying. i liked the fact that there are no gaskets below the level of the fuel in the float bowls to leak.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
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From: Oxford MA-----You just lost the game!!!!
I really hope some people who have actually used these Summit Racing carbs chime in, I am very intrigued by them. Annular discharge boosters, being able to use holley parts, and the price seems too good to be true. I'd like to see a single fuel inlet with side hung floats version, though. Makes for a nice, simple, compact package.
Scott
Scott
Safety Car
Joined: Oct 2000
Posts: 3,593
Likes: 103
From: Southern Indiana
I never heard of a recall on it for a carb wide problem???
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From: Columbia South Carolina
Pro
Joined: Oct 2007
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From: Overland Park Kansas
I never used the original holley ones, so I can't comment on those. I can say it took almost no time to get my summit one up and running. I also (as part of my normal carb install) disassembled it to check everything. There was no extra flash from the casting, no shavings anywhere, and the base plate and all gasket surfaces were as straight as my straight edge could measure. It's been a great, reliable carb on my modified 383. That's pretty much all I can say on the subject. If you have any specific questions, I'd be happy to answer them. And yeah, no gaskets below the fuel level is great. A lot less cleanup while tuning.
Before I had the dist fully installed and wires routed. Summit 750 on top!
Before I had the dist fully installed and wires routed. Summit 750 on top!
Last edited by neuroclast; Sep 18, 2011 at 08:39 PM.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
I never used the original holley ones, so I can't comment on those. I can say it took almost no time to get my summit one up and running. I also (as part of my normal carb install) disassembled it to check everything. There was no extra flash from the casting, no shavings anywhere, and the base plate and all gasket surfaces were as straight as my straight edge could measure. It's been a great, reliable carb on my modified 383. That's pretty much all I can say on the subject. If you have any specific questions, I'd be happy to answer them. And yeah, no gaskets below the fuel level is great. A lot less cleanup while tuning.
Before I had the dist fully installed and wires routed. Summit 750 on top!
Before I had the dist fully installed and wires routed. Summit 750 on top!
What kind of fuel mileage do ya get?
Scott
Instructor
Joined: Jun 2011
Posts: 183
Likes: 1
From: Litchfield CT
Summit carb
I really hope some people who have actually used these Summit Racing carbs chime in, I am very intrigued by them. Annular discharge boosters, being able to use holley parts, and the price seems too good to be true. I'd like to see a single fuel inlet with side hung floats version, though. Makes for a nice, simple, compact package.
Scott
Scott
Being the worlds greatest cheapskate, I bought a factory refurbished one. It looked and behaved like it was brand new. For $199.00.
Car runs GREAT. I get 21 MPG (with Tremec TKO 5 speed, 3.08 rear).
Great value for the money 
Race Director
Joined: Mar 2006
Posts: 14,112
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From: Florida
That style is my all time favorite short of multiple webers or dellortos.
Holley copied the old Autolite 4100 design of the mid 60s, and now Summit has copied the old Holley.
The one I have is a spreadbore 750cfm mechanical secondaries, so it has all the advantages of the spreadbore design, plus annular boosters.
The design eliminates any bowl leakage, is aluminum instead of pot, and the nice thing about the mechanical secondaries is that I could feel when they were to open thru the gas pedal and could stay out of the secondaries if desired.
It did take about 15 openings and some drilling etc to get the a/f right, but once set, it got the qjet mileage with slightly better performance. It would even pass the emissions testing we had at the time, with better numbers than a q jet.
Never tried the Summit ones, shame they don't have a spreadbore model.
Holley copied the old Autolite 4100 design of the mid 60s, and now Summit has copied the old Holley.
The one I have is a spreadbore 750cfm mechanical secondaries, so it has all the advantages of the spreadbore design, plus annular boosters.
The design eliminates any bowl leakage, is aluminum instead of pot, and the nice thing about the mechanical secondaries is that I could feel when they were to open thru the gas pedal and could stay out of the secondaries if desired.
It did take about 15 openings and some drilling etc to get the a/f right, but once set, it got the qjet mileage with slightly better performance. It would even pass the emissions testing we had at the time, with better numbers than a q jet.
Never tried the Summit ones, shame they don't have a spreadbore model.
Le Mans Master
Joined: Dec 2006
Posts: 5,557
Likes: 9
From: Oquirrh Mountains
St. Jude Donor '09
These are the old Holley 4010/4011 carburetors that were discontinued in the 90's and were Holley's attempt at a 'modular' carburetor. I don't know if Holley is making them for Summit or if someone else acquired the tooling.
Personally, I would go with a street avenger carb. before one of these. Or better yet, get your QJ rebuilt and tuned for your engine.
Personally, I would go with a street avenger carb. before one of these. Or better yet, get your QJ rebuilt and tuned for your engine.
