king2517

I'm going to be removing my computer controlled carb and replacing it with a edelbrock carb the reason is I absolutely hate this computerized carb , all emission garbage has been removed, I already bought a aftermarket distributor
My Question is what is the best Edelbrock carb the will hook directly up to my cable setup throttle and passing gear is what I'm talking about and yes I do know I need a adapter for my intake

hockeyman48

Are you against going with a non computerized rochester quadrajet , which will probably match all linkage and intake manifold design?

hockeyman48

Reason I asked was I just switched my 84 Z 28 over(carb and dist.) and used a Jegs quadrajet and have no issues with carb operation.Runs / idles perfect.

Tuned Performance

iTrader: (92)

With the edelbrock performer you need additional parts
https://m.summitracing.com/parts/edl-8026
https://m.summitracing.com/parts/edl-8009
They do make q-jet replacements like stated above.
You also need a non ccc hei dizzy.

king2517

I'm open to about anything as long as It not computer controlled, what model Qudrajet did you use ?

king2517

what is a Non ccc hei dizzy

Tuned Performance

iTrader: (92)

http://m.ebay.com/itm/Racing-Chevy-V8-HEI-Distributor-w-65K-Coil-7500RPM-350-454-SBC-BBC-GM08-/252215931376?hash=item3ab93db1f0%3Ag%3Arb4AAOSwe7BWy7gQ&_trkparms=pageci%253Ac3a60750-da9c-11e6-923c-74dbd1e05308%257Cparentrq%253A9ec9efac1590a2a203364035ffc0a52c%257Ciid%253A2

king2517

ok thats what I got thank you

zed-028

I did this a while back - Went from a Computer Controlled Quad and Computer Dizzy to a Non Computer Quad and a Big Cap Vac advance Dizzy.

Dizzy swaps are straight forward, take photos for reference.

I found a carb for about $20 bucks off of an old Pontiac 400 ( not sure how such a carb wound up in Australia), soaked it in Metal Rescue for an hour. put a kit through it with a few extra parts - namely the secondary metering rod cam which was a pain in the *** to do.

put the carb on and within about 10 mins had it running. I had to file down one of the round pin connectors to a flat base for the trans cable but that was about it.

If i had to do this again, the whole lot would take me about an hour including the rebuild. Youll spend more time dicking around getting the secondary air door tension right than anything

happy spannering

hockeyman48

Jegs or summit racing can help out with model carb for your application.Rebuilt carb is around 300 bucks though.

five7kid

iTrader: (14)

Whatever you hate about the computer controlled q-jet will be less of a problem than going to an Edelbrock.

An Edelbrock will not fit on a stock intake manifold (you didn't mention anything about what intake you have, or intend to get). It won't hook up to the stock linkage if you have a TH700R-4 (you didn't say what you have), you'll need a "geometry corrector" bracket for the TV cable.

The bias against the stock computer q-jet is unjustified. It's the best street-performance carb you can get.

But, if you insist on going non-computer, at least get a Holley. Edelbrock makes decent intake manifolds, but their carburetors are nothing to write home about (but plenty good to write on internet forums to get advice on how to get it to work right).

midias

I have never understood why people do this swap all the time. This is the only board I have been on where people actively try to go backwards in technology.

While you are at it dont forget a jet and rod kit, vacuum gauge and A/F Meter to tune the new carb.

brettr81

The computer controllered Q-Jets usually work pretty good, I've had 2 different cars with them and as long as I kept the carbs clean, they ran good. Personally, I'd rather spray some carb cleaner, run some seafoam or whatever, than have to adjust everything each time the weather changes.

The thirdgen I have now, the PO did a half a$$ed v6-v8 swap and I have no computer controls. Living in Illinois where the weather is more bipolar than most women, it means I have to adjust the carb waaay too often this time of year. Clean it, get a used or rebuilt one, or even rebuild your own.

It's your car do what you want to do. Just remember, no matter what route it will require maintaining, unless you are one of the lucky people that live in an area where temps don't change much.

jeff swisher

That was a big thing to do in the late 80 and 1990's to de-computerize these GM cars.
I did a lot of them and in the end they ran better and got better MPG.

Usually from a better timing curve and adjusting the APT on the Non computer carb.

I swapped a lot of carter AFB's onto the vehicles and I would take the easy way out and cut off the linkage of the original carb and weld it to the AFB I was using.

You do not need an AFR gauge.. But you do need to know how to tune.
And how to understand and rebuild a carb and distributor to get maximum benefit from the swap.

All my carbed deals I would jet them down until they got a lean surge.. then come up on jet or APT or metering rod until the surge was just gone.. then another .001"-.002" more to be on the same side for different weather conditions.

For tuning the secondary side if there is one I rev to best shift RPM in first and shift into second and see how the car recovers.
If it falls on it's face I will richen the secondary side.
I want it to have good recovery when you shift.. usually pushing you back even farther into the seat.

I have done it like this for over 30 years and it never failed me.
Recently I have been putting my vehicles on a rear wheel dyno and checking AFR at the same time.\

First vehicle I did was a daily driver 1947 dodge truck with 305' chevy in it and a 4 barrel carb.
Idle AFR was 18
Part throttle and cruise AFR was 14.5 Full throttle was 13.5.

The owner of the shop asked if I tuned it with a wide band.. Nope I did it by feel the old fashioned way.
My 750 edelbrock and my ported and epoxied 750 double pumper show almost the exact same AFR.

A lot of the stuff you need to know is hard to find on the net.. but it is in books.
That is where I spent many days ,,reading books.
Qjet and Holley books .. those HP and other How To books were cheap knowledge. still are.