jsmith929

I have a 88 Gta with a lingenfelter cam that specs out @ 213/219 with 488 lift on 112 centerline.I have upgraded the springs to a stiffer set and am running 1.6 rockers.I have Slp stainless 1 3/4 headers with the 2 on the left exhaust with a 3" random cat.I also installed a B&M 2400-2600 stall in the trans .The car is running one of the hypertech chips(I know I bought it like 15 years ago and felt suckered on it then ).Installed is a Accel 300+ ignition with matching wires ,timing is at 6 degrees .My problem is I put to much stuff on at once and now I'm not sure where to start as the car has no bottom end power but pulls good from 2500-5000.I'm leaning towards putting it on a dyno and seeing what my a-f ratio is and also looking into a custom chip.I know the cam isn't huge but I can't even come close to spinning the tires ,just a little frustated with it anyone with some experience that can point me in the right directon it would be appreciated .

Atilla the Fun

I've used that converter twice. And judging from the rest of your post, there's no good reason you shouldn't be destroying tires at every green light. Your engine is nowhere near serious enough to be running those 1.75" headers, you'd find small improvements by dropping back to 1.625", but considering the cost, it's probably not worth it.
Pulling well 2500-5000 is about right for what you have. Is the converter actually flashing to 2400? If you have a lack of torque below 2500, then the converter would only flash to about 2100.
Enough technical specs, give us more description of the behavior and driveability that bothers you.
Living with that converter when you're in no mood for spirited driving is absolute hell. It won't move from a dead stop without excessive movement of the gas pedal.
If this is what you're not liking, then switch to a 2000 stall. Especially if your converter is flashing to 2500-2600.

jsmith929

Car idles good just when you want to leave a light it's like the car is having a hard time burning the fuel .I thought about swapping the stock ignition back on see if that helps and I have the fuel pressure at 47 I know it seems a little high but it seems I get better throttle response with it like that ,I might try backing the fp down and see .Does it sound like I would benefit from a custom chip or would that be useless at this point,Also the headers were for a what I thought was a soon to be coming 400 but like everything else plans change.

Atilla the Fun

If you're getting a tip-in hesitation I'd suspect you don't have enough enrichment.

DT1987RS

Did you use a degree wheel to set up the cam? As for the rest of your combo it sounds like it should have plenty of throttle response and low end torque. As mentioned the headers are a little large for the rest of the combo but should not give you this issue. It could be the ignition I would probably switch back to the one you were familiar with before all of the other changes.

jsmith929

I just lined up the dots on the gears and went with that,I thought that this combo should have better lowend.Like I said earlier I wish I would have done one thing at a time and It would make it easier to track down the issue.Have any of you guys seen the stock balancer slip,I'm still running the stocker and just wondering if it's still accurate or is this something I should not even worry about.

305sbc

iTrader: (3)

You don't have a problem with your choice of mechanical parts. It's more likely that your tune isn't matching what you've got. I think your best bet is to hook up a laptop and do some datalogging. It will show you what your fuel trims are looking like, and also what your timing curve looks like.
You may find that you need to adjust your MAF tables, add more acceleration enrichment, or add more spark advance in the lower RPM range. If there is an experienced tuner in your area, then a visit for some troubleshooting, and possibly a PROM adjustment may fix you up.

Another possibility is that you're experiencing some misfires when you first load the engine. Causes of that could range from a small problem in the ignition to a lifter pre-load adjustment error.

jsmith929

There's a place local that does it I'm gonna call and see what he wants to dyno it and maybe a custom prom.I called Speed Inc. and they didn't seem to interested in it.I'll see what he say's on mon. ,meanwhile I'm gonna switch ignitions back and see what I get.

jsmith929

Quick update ,Swapped back to stock ignition,car feels stronger will actually spin the tires some but after 15 min of driving car starts cutting out and back firing .Swap the accell 300 + back on and car doesn't back fire but is back to being sluggich off the line.I'm gonna look at the hei module and check that out,hopefully it will be something easy like that,it is a Accell module which I have heard is hit and miss so we will see.

jsmith929

Quick update swapped factory ignition module back on car runs with no back firing or stumbling.Runs great as long as rpm are at 2000 or above ,checked with some local chip burners and no one local to me can do it.So next question are ed wright chips good enough or should I just wait and try to get some one local to do it ?