Carburator size
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
Carburator size
Hi all. L48 with sportsmann 2 heads with 64cc chamber and 200 cc intake runners.
Summit 1104 cam, basic op.range 2000-5600 rpm.duration at 050 inch lift 224 intake/224exhaust. Lift 0465 int./0465 exh
Edelbrock eps intake.
Th400 with 2400 stall speed converter.
What caburator size will be the right one for this setup?
Thanks Peter
Summit 1104 cam, basic op.range 2000-5600 rpm.duration at 050 inch lift 224 intake/224exhaust. Lift 0465 int./0465 exh
Edelbrock eps intake.
Th400 with 2400 stall speed converter.
What caburator size will be the right one for this setup?
Thanks Peter
Last edited by peterbuchberg; Jun 16, 2014 at 11:46 AM.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I believe carb cfm calculator programs are very close. I also believe in smaller cfm for drivablity over a small power loss at higher rpm.
It is amazing how much power race teams manage to get out motors with a two barrel carb or restricted to less than 600 cfm 4 barrel class cars make.
I always wanted to try a 650 DP on my 7500 rpm 383
It is amazing how much power race teams manage to get out motors with a two barrel carb or restricted to less than 600 cfm 4 barrel class cars make.
I always wanted to try a 650 DP on my 7500 rpm 383
Le Mans Master
Joined: Oct 2007
Posts: 7,422
Likes: 955
From: Tennessee/Rhode Island
Holley 650 CFM 4175 vacuum secondary Qjet replacement-easy to fine tune, easy to rebuild, mine has been ultra reliable for 25 years now. Unless you have the OEM Qjet, I would stay away from after market ones and rebuilts-they can be very problematic, if not perfect. If you do have the OEM Qjet, send it to Lars for a rebuild , if necessary.
Last edited by jb78L-82; Jun 16, 2014 at 02:43 PM.
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
Holley 650 CFM 4175 vacuum secondary Qjet replacement-easy to fine tune, easy to rebuild, mine has been ultra reliable for 25 years now. Unless you have the OEM Qjet, I would stay away from after market ones and rebuilts-they can be very problematic, if not perfect. If you do have the OEM Qjet, send it to Lars for a rebuild , if necessary.
Le Mans Master
Joined: Oct 2007
Posts: 7,422
Likes: 955
From: Tennessee/Rhode Island
Drifting
Joined: Dec 2004
Posts: 1,714
Likes: 42
From: Austin Texas
Looks like the EPS manifold is square bore. Qjet is spreadbore and may need an adapter that could raise the height beyond where you want it.
What carb do you have , what is/was on the motor when you got it?
What carb do you have , what is/was on the motor when you got it?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
I have an old 600 edelbrock on right now, but it's boiling and leaking fuel, so I was looking for a replacement.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Also, 200cc intake port heads and an EPS intake? That doesn't sound like a very good match, does it?
Scott
Last edited by scottyp99; Jun 17, 2014 at 09:42 AM.
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
I can see your point,but at the same time I wanted underhood clearence, so maybee that was the best choise, I dont know.
Le Mans Master
Joined: May 2007
Posts: 5,007
Likes: 1,114
From: North tonawanda NY
I am in the same boat only I have a new weber/carter/edelbrock afb style 600cfm (actually 625) carb on mine now and its about to be started for the first time this week. everything I,ve read including desktop dyno says a 750cfm carb will give me about 6-7 more top end hp and torque but throttle response and part throttle behavior will suffer as well as mileage..
eventually I plan on looking for something like a 670 cfm avenger which should be a good compromise.
eventually I plan on looking for something like a 670 cfm avenger which should be a good compromise.
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
I am in the same boat only I have a new weber/carter/edelbrock afb style 600cfm (actually 625) carb on mine now and its about to be started for the first time this week. everything I,ve read including desktop dyno says a 750cfm carb will give me about 6-7 more top end hp and torque but throttle response and part throttle behavior will suffer as well as mileage..
eventually I plan on looking for something like a 670 cfm avenger which should be a good compromise.
eventually I plan on looking for something like a 670 cfm avenger which should be a good compromise.
Burning Brakes
Joined: Jan 2007
Posts: 1,057
Likes: 4
From: Concord Calif
If you use a vacuum secondary carb of any brand flow rating will mean almost nothing. So they would be my first choice especially a Q jet type with the small primary and large secondary bores. The point is that the vacuum secondary's will only open as needed by the engine even if that means not opening all the way.
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
If you use a vacuum secondary carb of any brand flow rating will mean almost nothing. So they would be my first choice especially a Q jet type with the small primary and large secondary bores. The point is that the vacuum secondary's will only open as needed by the engine even if that means not opening all the way.
Race Director
Joined: May 2006
Posts: 18,626
Likes: 2,553
the Edelbrock site for that manifold shows up to 650 but the cam and heads seem to be at odds with the manifold
http://www.edelbrock.com/automotive/...ormer-sb.shtml
http://www.edelbrock.com/automotive/...ormer-sb.shtml
Thread Starter
Intermediate
Joined: Jan 2013
Posts: 46
Likes: 0
the Edelbrock site for that manifold shows up to 650 but the cam and heads seem to be at odds with the manifold
http://www.edelbrock.com/automotive/...ormer-sb.shtml
http://www.edelbrock.com/automotive/...ormer-sb.shtml