Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Sign in using an external account
Register Forgot Password?
Register Albums Search Today's Posts Mark Forums Read FAQ
Search
C1 & C2 Corvettes
General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations Sponsored by
Flaming River
Industries

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C6 Parts & Accessories
C5 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 09-02-2012, 05:07 PM   #1
frankgv
CF Senior Member
 
frankgv's Avatar
 
Member Since: May 2005
Location: Chicago
Default carb size for 327

Hello,
Happy labor Day Weekend, hope all had a geat summer and enjoying
your Corvettes

I have replaced my 'stock intake( defective) with a edelbrock
performer rpm and 1" spacer ( available) which gives me a 1.7" height over the old set up. Running a 327 with mild cam, roller rockers, headers, pertronix.

I have been using a 650 Holley street avenger carb. will an "other" carb
, 750 ?? give any benefit ( hp / torque) or will I just be limited by the
cfm intake of the 327. Thanks for any input.

Frank DeWinter.
frankgv is offline   Reply With Quote
Old 09-02-2012, 05:23 PM   #2
63Corvette
CF Senior Member
 
Member Since: Apr 2001
Location: Granbury Texas
Default

It depends on your proposed usage. My car is a RACE car. My Rochester Fuel Injection only flows around 600CFM. My engine combo probably makes horsepower above 7000rpm, but my intake restriction (Rochester FI) limits my .030 over 327 to just over 7000rpm. The calc shows that a 327cid engine pumps about 602cfm at 7000rpm, so for (say) drag racing when the engine speed never drops below 6000, and shifts are at 8000 you could benefit from a ram type or individual runner manifold and a 700cfm (or 750) carb. HOWEVER, for a street car, with daily drivability issues, and a 2000 to 5500rpm usable rev range (even for autocross or some mild competition events) a 600 or 650cfm carb on a torquer type manifold is about the most efficient combo, altho it loses some of the "cool factor".
__________________
Garrett Waddell
1963 Z06, SVRA #928, Medallion #6-0140


1969 L88, IMSA #295
63Corvette is offline   Reply With Quote
Old 09-02-2012, 05:46 PM   #3
Hitch
CF Senior Member
Support Corvetteforum!

 
Hitch's Avatar
 
Member Since: Jul 2002
Location: Clayton NC
Default

I have run both 650 and 750 mechanical secondary carbs on my motor. The 650the was more crisp off idle but the 750 does a lot better at cruise and wide open throttle. It depends on your motor, cam specs, heads, intakes etc... what are your cam specs?
Hitch is offline   Reply With Quote
Old 09-02-2012, 11:31 PM   #4
frankgv
CF Senior Member
 
frankgv's Avatar
 
Member Since: May 2005
Location: Chicago
Default 327 carb size

Thanks guys, from your inputs the
650 I have will stay there .
frankgv is offline   Reply With Quote
Old 09-02-2012, 11:31 PM
 
Go Back   Corvette Forum > C1 & C2 Corvettes, 1953 - 1967 > C1 & C2 Corvettes
Reload this Page carb size for 327
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 05:30 PM.


Emails & Password Backup

Search Engine Friendly URLs by vBSEO 3.5.2