C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Carb Question...

Thread Tools
 
Search this Thread
 
Old Mar 12, 2006 | 02:15 PM
  #1  
sly vette's Avatar
sly vette
Thread Starter
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default Carb Question...

I have a 350 block .060 over,3.48 stroke W/flat top pistons that now has a Disp. of 360c.i.d. @ 11.2331:1 C.R. A hydraulic lifter cam @ 468/.480 lift and duration @ .050 .220/.231. I have a Edelbrock single plane manifold a 750 c.f.m. holley carb W/mech secondaries and headers. The problem is that I think the carb will be too large,and I was wondering if you guys think it may be poss. to jet this carb down, so that I can still use it. I also have a 3.08 gear W/4 speed. If there is anything else you can see wrong with this setup,please feel free to let me know.
Reply
Old Mar 12, 2006 | 02:49 PM
  #2  
rcread's Avatar
rcread
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2004
Posts: 10,628
Likes: 132
From: Duvall, WA
Default

That seems like a lot of compression for that cam. What heads are you running? What type of fuel?
Reply
Old Mar 12, 2006 | 03:12 PM
  #3  
sly vette's Avatar
sly vette
Thread Starter
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default

I have camel back heads@64cc's,and I sure woulr like to run pump gas...
Later,
Sly
Reply
Old Mar 12, 2006 | 03:40 PM
  #4  
lebvette's Avatar
lebvette
Le Mans Master
20 Year Member
St. Jude 10 Year Donor
 
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Default

Originally Posted by sly vette
I have a 350 block .060 over,3.48 stroke W/flat top pistons that now has a Disp. of 360c.i.d. @ 11.2331:1 C.R. A hydraulic lifter cam @ 468/.480 lift and duration @ .050 .220/.231. I have a Edelbrock single plane manifold a 750 c.f.m. holley carb W/mech secondaries and headers. The problem is that I think the carb will be too large,and I was wondering if you guys think it may be poss. to jet this carb down, so that I can still use it. I also have a 3.08 gear W/4 speed. If there is anything else you can see wrong with this setup,please feel free to let me know.
Carb. doesn't sound that bad, except for the mech. secondaries. The singel plane manifold is really not made for the street, either. As I mentioned in another post; deeper gears would be nice. Also, as mentioned in another post, with 64cc heads and flat top pistons... I don't see that kind of C.R.....maybe, 10:1....maybe. Larry
Reply
Old Mar 12, 2006 | 03:49 PM
  #5  
sly vette's Avatar
sly vette
Thread Starter
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default

Thanks for all your input Larry. Do you have a way to double check my C.R.? I used the comp. calculator that was on this site a while back, but I agree,something just is'nt right. I really need help on this one,with the selection of a cam being so critical.Anything you or anyone else could do to help me would be appreciated.

p.s. The numbers needed to calculate my comp. are in my other thread "Need help picking a cam"
Thanks to all
Later,
Sly
Reply
Old Mar 12, 2006 | 03:54 PM
  #6  
lebvette's Avatar
lebvette
Le Mans Master
20 Year Member
St. Jude 10 Year Donor
 
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Default

No, I dont' know enough about it, but there's about a hundred guys on this forum that CAN tell you. Good luck. Larry
Reply
Old Mar 12, 2006 | 03:58 PM
  #7  
sly vette's Avatar
sly vette
Thread Starter
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default

Thanks anyway for the input. every bit helps.
Later,
Sly
Reply
Old Mar 12, 2006 | 05:15 PM
  #8  
lars's Avatar
lars
Tech Contributor
Supporting Lifetime Gold
25 Year Member
Conversation Starter
Photogenic
Top Answer: 3
 
Joined: Aug 1999
Posts: 14,356
Likes: 6,328
From: At my Bar drinking and wrenching in Lafayette Colorado
Default

Originally Posted by sly vette
750 c.f.m. holley carb W/mech secondaries and headers. The problem is that I think the carb will be too large,and I was wondering if you guys think it may be poss. to jet this carb down, so that I can still use it.
Jetting the carb down won't change the cfm of the carb. It will just lean you out and make the carb perform poorly. The stock Q-Jet on your car was 750, so there is nothing wrong with running a 750 mech sec carb. Set it up to its stock specs for the list number, set up the float levels correctly, set your secondary idle to match the primary, and that carb will run just fine - no problem. You can even bump the jetting UP 2 sizes from the stock size for a little better throttle response on your setup.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Mar 12, 2006 | 06:01 PM
  #9  
sly vette's Avatar
sly vette
Thread Starter
Safety Car
 
Joined: Oct 2005
Posts: 3,570
Likes: 1
From: Algonac Michigan
Default

Hi Lars,
Got the time to check out this thread for me? " need help picking a cam" I can't seem to figure my compression out and the numbers needed to figure the comp. are listed there.
Thanks,
Later,
Sly
I would post a link, but I don't know how.

Last edited by sly vette; Mar 12, 2006 at 06:12 PM.
Reply

Get notified of new replies

To Carb Question...





All times are GMT -4. The time now is 08:29 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE