Cascade Crew

turbo_jimi · Posted: Tue May 20, 2008 8:37 pm Post subject: Edelbrock Carb Set-up

Wondering what all I need to do the Edelbrock carb conversion. I'll be picking up the #1406 tomorrow and I already have the fuel line kit. What else will I need? Part numbers would be helpful. Smile

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

If this is an LG4 you'll need a non computer controlled distributor. You might also want to get a heat insulating spacer to go under the carb, as the Edelbrocks tend to get quite hot and run like poo when you have a warm engne and shut it off for a few minutes.

turbo_jimi · Posted: Tue May 20, 2008 8:59 pm Post subject:

The spacer, i understand, but why the non-HEI?

iansane · Posted: Tue May 20, 2008 10:00 pm Post subject:

HEI is fine, but you want a dizzy that the timing isn't computer controlled; if I understand it correctly.

chevymad · Posted: Tue May 20, 2008 10:02 pm Post subject:

You want HEI, you just dont want the computer controlled version. Without the tps the computer won't know what to do with your timing. You need a 70s early 80s large cap hei. If the car is an auto with 700r4 you'll need special brackets to make the transmission work right as well. If its not exactly right you can burn up the trans. Also without computer control you'd need a lockup kit for the torque convertor. Fluid flow through the oil cooler is reduced to less then 50% when the tranny's unlocked. If you're a stick shift, then all you need is the ignition.

Oh, and you'll need either an intake manifold or an adapter plate for the carb as well. Even edlebrocks own performer intake doesnt work correctly with their carb. Rod's right about the heat spacer. With a regular aluminum adapter you'll have heat soak problems and it won't want to start when the motors warm. Get a phenolic or plastic adapter. With all this you'll probably have hood clearance isssues.

83Z28BlackBetty · Posted: Tue May 20, 2008 10:07 pm Post subject:

whats up with the tranny burning up? and the lockup kit?

Now you have me worried...not sure what this means and i'm not sure the guy i bought my car from did any of this? Confused

~JAKE

aaron_sK · Posted: Tue May 20, 2008 10:17 pm Post subject:

Does your TCC harness go anywhere Jake, or is it hanging?

83Z28BlackBetty · Posted: Tue May 20, 2008 10:47 pm Post subject:

there isn't anything under the dash. I have a few plugs that used to plug into something that are just hanging now. I cut all the fuel injector wires, and misc sensors that were just hanging in the engine bay and followed them back there. so most of them are disconnected, but some i don't know what they do so i just left them.

I think it is pretty jerry rigged but it wasn't me who did the carb swap so...yeah. I'm not too sure what to do with it

turbo_jimi · Posted: Wed May 21, 2008 6:03 am Post subject:

I have a T5 Tranny, so I don't think i'll have any problems there. And what is TPS? Almost sounds like i'd be better off adjusting my q-jet than to mess with all of this...lol!

iansane · Posted: Wed May 21, 2008 6:08 am Post subject:

tps = throttle position sensor.

Which you ditch when you go to a 1406. Smile

blue89 · Posted: Wed May 21, 2008 6:56 am Post subject:

Have you pulled all the wires that come from the passenger side? It is really easy to pull all the wires back. I did it to a few cars and it makes everything look really clean. Hardest part is filling the hole in the passenger kick panel that the bulkhead plug goes through.

turbo_jimi · Posted: Wed May 21, 2008 10:16 am Post subject:

Xophertony · Posted: Wed May 21, 2008 11:23 am Post subject:

if you are fuel injected and have no TPS you would know. the car would buck and sputter alot. would also run real rich. you would have exhaust pops

turbo_jimi · Posted: Wed May 21, 2008 1:58 pm Post subject:

And since I have a q-jet, what will I notice if i don't change distributors?

Quasi-Traction · Posted: Wed May 21, 2008 3:50 pm Post subject:

again, what everyone's saying is that if you have a basically stock LG4 and you go with the Edlebrock Carb, you're going to have to change your distributor to a HEI with a vaccum advance pod on it.

You need vaccum signal from the distrubutor to the carb, If you run the edlebrock, you NEED a dizzy with a vaccum pod on it.

I don't know if you can do the HEI with the vaccum pod and keep the CC-Quadrajet. I suppose it could work if you retained all the sensors and kept the ECM.

Xophertony · Posted: Wed May 21, 2008 5:57 pm Post subject:

if you want to see how your edelbrock will run without a vacuum advance, just unplug the computer on your current setup.... Very Happy

if you have a computer controlled carb on your car you have a TPS, just like Chris and everyone is saying. to my understanding on a FI car the TPS input is used to determine fuel flow (and perhaps spark timing). on a CCC it is only used for spark timing. if you have no TPS you will have NO spark advance. so you will probably be rich, get exhaust popping and have a bunch of lurching and surging. on an FI car i think other factors go inot both fuel and spark adjustment, which is why i can drive my car without a TPS. it just really sucks.

turbo_jimi · Posted: Wed May 21, 2008 8:28 pm Post subject:

so...is there an aftermarket carb that has the computer hook-up, seeing that i don't really want to buy a distributor right now.

mrpopo573 · Posted: Wed May 21, 2008 8:47 pm Post subject:

Good Question. I personally wouldn't want to do this swap just to have a computer controlled quadra jet again.

turbo_jimi · Posted: Wed May 21, 2008 8:58 pm Post subject:

OK, so this project will be happening later than I thought...lol...so, what reccommendations are for the distributor and possibly ignition for the edelbrock set-up? Part numbers and best deals would be great to know.

For the time being, I'll just play around with the q-jet until funds become available.

turbo_jimi · Posted: Wed May 21, 2008 9:04 pm Post subject:

Would this help me?

Schucks Part # 31035
Adjustable Vacuum Advance: Gm/Hei V8 Distributor With Vacuum Advance