Okay, here the deal.

My motor either bogs and doesn't really launch the car,

or

It launches tha crap out of it but spins the tires all the way until 4000 rpm in second.

Please tell me what I can do. I've already ordered some tubular lower control arms, and I think that 3.73's are a bit much for my setup. 3.42's would probably be better. Also I thought I had the carb tuned perfect but I don't think so anymore. I use a vacuum gauge as well as a Air/fuel gauge and still can't get the off Idle right. What gives??? WHAT RPM SHOULD MY CAR IDLE AT (manual trans.)??? I have it set at 700 or so. 900-1000???

This bogging is causing my e.t.'s to fluctuate within 1.5 seconds!!! That's horrible. I can run a 14.2 followed by a 15.7.

I want the car to be consistent, I think the control arms will help, but won't solve the problem entirely.

LOOK IN SIG AT THE SETIP ON THE 84'-

 

The bog sounds like a carb problem. Are you sure it's in good shape? It sounds like the float level isn't set correctly. you might have better luck asking about this in the carb board. as for your spinning problem, what kind of tires are you running and at what pressures? I would start experimenting with you current combo before buying new parts. Maybe it's something simple as to much air in the tires or maybe you need a stickier set.

 

I have brand new 255 Kumho's on GTA wheels in the back. I also have a energy suspension torque arm bushing and that made the spinning worse.

When I went to play with my Gtech yesterday, I was leaving dual 25 foot ruber marks from the launch. Dual, even though I don't have posi.

The carb is brand new, or about 2,000 miles old. It is the 1406 electric choke model, no modifications whatsoever.

 

it is probably your secondaries not opening and that is why you get a bog off the line. And when your secondaries do open you get wheel spin. Or your choke could need adjusting.

 

A bog is normally the sign of too much air/not enough fuel.

Go here

https://www.thirdgen.org/newdesign/tech/quadrajet.shtml

and read about the (AV) adjustment.

 

Is your ECM, disconnected? If not that it will mess everything up. You cant run a non stock carb with a stock dist. Or anything else for that matter. Just use the ECM for the tranny. You could also be running lean, think powervaulve. Or air mixture.

 

Look at my sig. We are talking about the 84' here. There are no weird problems here. No the ECM is definately not hooked up. And I definately would not use a stock distributor on my edelbrock carb setup. I don't need the ECM at all cause I got a 5 speed. C'mon now.

Thanks for the article but I don't have a quadrajet.

 

I believe for a holley you can get a 50cc accelerator pump vs the normal 30cc. You can get a off the line bog because of a lack of fuel from the pump. You might also try different springs to open your secondarys a little later. I'm sorry I can't help more but I don't have a lot of experiance with holleys.

 

With the bog: it could coinciding with the carb be something with your timing. If you have changed it recently try setting it back. My 84 has a Holley carb with the "quick-change" secondary spring kit. Ever since cooler air has come to the area it seems that it's easier to bog when launching, so I just put a stronger spring in its place to open the secondaries later and that worked. Might not help you but it's worth the 60 seconds of effort to install a heavier spring. If you don't have the quick change kit, adjust the mixture abit, you could be running too rich/lean.

With the spinning I doubt it is your tires too. My guess is that with the 3.73's and the amount of horsepower released from the car you've got no trouble spinning the tires. Thirdgen's don't have the best rear suspension setup for a drag race or off-the line situation. Granted they are better than some other rear suspension setups but they still have issues. You're doing the right thing by getting the tubular lower control arms. That should set up everything to hook real nice. If that doesn't do the trick then consider spending an extra $100 or so for a Panhard rod and you should be good for low 13's/high 12's.

Idle speed on my 84, which was originally a LG4 was to be set at around 900-1000 rpm. The automatics were set at 750 rpm.

Hope this information helps.

 

I don't have a freakin' Holley!!! I have a 1406 Edelbrock!! My fuel psi is 5 and my timing is 12 degrees base with aq stock vac. advance canister and a spring and weight kit using the lightest springs in the kit.

 

Well gosh darnit!!!!!!

An Edelbrock carb is set up pretty much the same as a Quadrajet as far as the AV. I'm not sure if the ability to adjust it is still there tough. UNLESS you don't have an air valve.

It's been 6 yrs since I've touched an Edel, so I don't remember everything about them. MINE was a mechanical secondary with the AV. It was a 1407, but basically the same as yours.

I had it on a 350 w/ a Holley highrise (single plane) intake and a Crane Fireball solid cam. It bogged BIG TIME!! I had to change to the heavier accel. pump spring and another guy that knew more about them set the AV for me. So I can't help you there. Sorry.

Have you tried the Carb board?

 

So the edelbrock have accelerator pump springs similiar to the holleys??? I don't really like taking carbs apart and stuff, it gets to be pretty tedious. I definately don't really want to take the air horn off my carb and adjust stuff in there though. I am not really familiar with workin' on carbs either, don't have much experience although I do have 2 cars with carbs. LOL! I'm learning though!

 

Sorry guess i saw the Holley Red fuel pump and a 3 port regulator, Holley Powershot filter and when it came time for the carb confused it for the carb, oh well my bad.