Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > Carburetors
Register Forgot Password?

Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

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 the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 05-17-2006, 10:12 AM   #1
Junior Member
 
Join Date: May 2004
Posts: 21
Car: 84 trans am
Engine: 350

Classifieds Rating: (0)
anyone ever port and polish a carb?

Just wanted to see if anyone had good results with p and p of a carb. I have a q-jet and deburred it and polished it didnt notice a change in power but a slight improvement in gas mileage.
gerard is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 10:50 AM   #2
Supreme Member
 
Sonix's Avatar
 
Join Date: Jul 2004
Location: Calgary, AB, Canada
Posts: 10,763
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73

Classifieds Rating: (1)
what parts did you port polish or deburr? The venturis? huh, figured that would be a bad thing as far as fuel mixing...?
Sonix is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 11:10 AM   #3
Moderator
 
Apeiron's Avatar
 
Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 20,979
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

Classifieds Rating: (0)

You don't really have to touch the venturis to make improvements, you can radius the entries into the throats, deburr the edges of the boosters, narrow the booster legs, etc.
Apeiron is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 12:37 PM   #4
Senior Member
 
Nebu's Avatar
 
Join Date: Jul 2003
Location: Germany
Posts: 260
Car: 91' Camaro
Engine: Carbed 305
Transmission: 5-Speed Manual

Classifieds Rating: (0)
Send a message via ICQ to Nebu
Click the image to open in full size.

i've done it

nebu.
Nebu is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 01:00 PM   #5
Junior Member
 
Join Date: May 2004
Posts: 21
Car: 84 trans am
Engine: 350

Classifieds Rating: (0)
Any hp improvments?
gerard is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 01:13 PM   #6
Senior Member
 
Nebu's Avatar
 
Join Date: Jul 2003
Location: Germany
Posts: 260
Car: 91' Camaro
Engine: Carbed 305
Transmission: 5-Speed Manual

Classifieds Rating: (0)
Send a message via ICQ to Nebu
my buttdyno hasn't noticed much of a difference. maybe a little.
Nebu is offline vBGarage Page   Reply With Quote
Old 05-17-2006, 01:53 PM   #7
Supreme Member
 
Sonix's Avatar
 
Join Date: Jul 2004
Location: Calgary, AB, Canada
Posts: 10,763
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73

Classifieds Rating: (1)
oh right, Tony'78Z I think is his name, try searching for a few posts by him. I think he put a 350 in a datsun 240z or something... anyway, in his sig he has a fair bit of info on that on his q-jet, very nice paint pictures as well.
Sonix is offline vBGarage Page   Reply With Quote
Old 05-18-2006, 09:05 AM   #8
Senior Member
 
Join Date: Mar 2005
Posts: 519

Classifieds Rating: (0)
porting and polishing carbs

I run an 850 dp holley on the chevelle and experimented with it. I cut off the choke housing, polished the venturies, boosters, and smoothed the transition into the top of the carb, and it looks much like the carb in the picture above. It was very labor intensive and time consuming, not worth the time and effort it my opinion, because you are still stuck with an old main body that doesn't have adjustable air bleeds, among other things.
In the end, I had the carb apart so many times at the race track for jet changes and what not, that eventually the screw holes started stripping out, The rear squirter was also stripped from removal and reinstall, it basically had met the end of it's life span so I ponied up and purchased a Pro Form main body, (had to go pro form since holley is not making an 850 main body available seperate, Yet anyway) it's a very slick main body that required no grinding/polishing and has adjustable air bleeds as well so it is more tuneable.
Once I had the jetting dialed in the car picked up about a tenth and almost 1 mph from it's previous best.
In my opinion, it's not worth all that effort when you can spend a measly $125 for a nice main body and be done with it,,,and it's better than anyone can do by hand.
With a Q-jet you are pretty much on your own though, as I am not aware of any aftermarket Q-jets that come this way,,which is too bad, I would like to try one on another car of mine if that were the case. Larry.
firebirdjones is offline vBGarage Page   Reply With Quote
Old 05-18-2006, 09:05 AM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Carburetors

Tags
boosters, carb, carbulator, carburator, carbureter, carburetor, carburetors, holley, poliosh, polish, polished, polishing, pollish, port, porting
Thread Tools Search this Thread
Search this Thread:

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

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 10:39 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details