Home page

Swapping Crossfire for Carburetor

Forum: C4 HVAC, Fuel, Emissions, and Exhaust

10 Messages
Page 1 of 1
Share:
Sponsored Content

Already a Member?

Welcome back! Access your account.

Sign In

Not yet a Member?

Join our community! Registration is free.

Join Free

Swapping Crossfire for Carburetor

Posted: 11/2/22 8:49amMessage 1 of 10
f
Free Member
Send PM
Joined: 11/5/2013
Posts: 7

Has anybody removed the TBI system and replaced with a carb?  What are the pitfalls?

Thanks in advance

Be the first to like this post
Sign In to Like this post
SPONSOR AD:: (Our Sponsors help support Vette Registry)

Re: Swapping Crossfire for Carburetor

Posted: 11/15/22 1:54pmMessage 2 of 10
Profile Pic
Lifetime Member
Vette Registry Founder
Send PM
Eagleville, PA - USA
Joined: 11/1/2001
Posts: 27294
Vette(s): Used to own a 1979 Corvette now owned by JB79

I have not myself. But found this on youtube, maybe it will help you?

https://www.youtube.com/watch?v=D9_oNAIJCTI

 

-Adam Wartell
NCM Lifetime Member #1222
Founder: Vette Registry 

My first Vette, now owned by JB79:

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 11/15/22 2:00pmMessage 3 of 10
f
Free Member
Send PM
Joined: 11/5/2013
Posts: 7

Thanks for the YouTube video

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 11/16/22 9:15amMessage 4 of 10
J
Free Member
Send PM
Joined: 5/10/2017
Posts: 5

Have '85 vette orginally with TPI.  Changed over to a Eldelbrock carburetor system.  Edelbrock AVS2, 650 cfm

carburetor and Edelbrock manifold.  You will need a pressure regulator with gauge to keep your fuel pressure

to 6 psi to make the system work with the carburetor, that is...if you keep your present fuel pump.   All runs great. 

Gas mileage sucks...but understand HP jumped up about 10% with the modification.    Good Luck.

JerryW

 

1 person likes this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 11/16/22 9:24amMessage 5 of 10
f
Free Member
Send PM
Joined: 11/5/2013
Posts: 7

Thanks. I was looking at the Edelbrock kit

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 12/1/22 10:05pmMessage 6 of 10
O
Free Member
Send PM
Saint Cloud, FL - USA
Joined: 1/10/2018
Posts: 41
Vette(s): 1983

Great idea !

 

https://m.youtube.com/watch?v=CkXBDE0LRX8



|UPDATED|12/1/2022 10:05:02 PM (AZT)|/UPDATED|
Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 12/1/22 10:26pmMessage 7 of 10
O
Free Member
Send PM
Saint Cloud, FL - USA
Joined: 1/10/2018
Posts: 41
Vette(s): 1983

Consider the following 

With the help of the Crossfire injection system, engine output for the 1982 Corvette was 200 horsepower at 4,200 rpm and peak torque of 283 lb/ft. at 2,800 rpm. Although that number seems low by today's standards, it was the highest output for a small-block Chevy in nine years.

 

The Crossfire induction system was also available on 1982 and 1983 Z28 Camaros, but only on the 305 cubic-inch motor (RPO LU5). In the Camaro, the Crossfire motor gave 20 more horsepower over the carbureted 305 engine.

 

 In the Camaro, the Crossfire motor gave 20 more horsepower over the carbureted 305 engine.

 

 

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 12/2/22 5:17amMessage 8 of 10
f
Free Member
Send PM
Joined: 11/5/2013
Posts: 7

I have replaced my IAC valves. That is when my problems worsened.  The was stalling from low idle. I replaced the IAC's and now my idle is between 2500 and 3000 rpm's. I cannot get it to drop. The carb seemed like an easy fix. 

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 12/2/22 6:24amMessage 9 of 10
B
Free Member
Moderator
Send PM
Joined: 3/20/2009
Posts: 690
Vette(s): Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe
firstvette84 said:

I have replaced my IAC valves. That is when my problems worsened.  The was stalling from low idle. I replaced the IAC's and now my idle is between 2500 and 3000 rpm's. I cannot get it to drop. The carb seemed like an easy fix. 



Holley Sniper EFI system is an easier fix.

(110) Holley Sniper EFI: Should You Buy It? 1 Year Review - YouTube

 

Be the first to like this post
Sign In to Like this post

Re: Swapping Crossfire for Carburetor

Posted: 12/2/22 10:54amMessage 10 of 10
O
Free Member
Send PM
Saint Cloud, FL - USA
Joined: 1/10/2018
Posts: 41
Vette(s): 1983


An even easier fix would be to take it to someone who knows how to tune a crossfire

 

i had to one degree or another most of the issues described - for example “idle hunting “ , sporadic Check Engine light

Took to experienced Corvette shop. 
They replaced all vacuum lines. 
even ones that appear to be serviceable if they are original ( most of mine were) are past their useful life by many years. At the least the rubber had deteriorated to being  slightly porous 

The shop did exactly as described in the video i posted - and replaced the items suggested

Been running as supposed to 40,000 miles +

It is not a complex system but if you are not familiar/experienced with it  - very easy to f*** it up

Be the first to like this post
Sign In to Like this post
Share:

in Forum: C4 HVAC, Fuel, Emissions, and Exhaust


Sponsored Content