New track times...still not happy...need help for 12's

[82 GT]

Just back from the track today. I ran a 13.400@102.29
The last time I raced, I went from a 13.47@104 to a dismal 13.8@100.2 mph. Apparently, it did not like the 750 and performer intake combo(13.8@100.2). This time I had the weiand stealth and 750vs and ran the 13.400@102.29.
So, I'm back to where I started but only a tad bit better than when I had the 600 carter and performer intake(13.47@104mph). My MPH is still 2mph down and my E.T is .07 better. I tried different spring advances in the dizzy and it seems to like the factory setting best.
I don't have the parts to fine tune the Holley so everything on that is factory settings except I have the lightest secondary spring in. My timing is set at 34* (24* mechanical and 10* initial). More initial and it gets hard to start up.
At this point, I'm assuming my 2400 stall converter is killing my 60' times.
I'm looking to crack the 12's but seem to be stuck in the 13'4's. What do I need to get the last 4 or 5 tenths I need?

[HotRoddin]

Originally Posted by 82 GT

Just back from the track today. I ran a 13.400@102.29

At this point, I'm assuming my 2400 stall converter is killing my 60' times.
I'm looking to crack the 12's but seem to be stuck in the 13'4's. What do I need to get the last 4 or 5 tenths I need?

this is really baffling me ??? The MPH baffles me even more than the ET
1. I think the cam needs some advance 2. The stall speed is killin you ... you said in another post I believe that actual stall you were getting was more like 2200 ??? 3. the hard starting when you go over 10 degrees initial baffles me
Feed me some info ... give me the exact model # of the pistons you're using. What is your deck clearance ... what cc's are the chambers in your heads (stock is 64 i think in that head ?) What rod length, stock ?
I wish you could make a pass open headers just to see, because I think you have a major mismatch in the works someplace, but it's odd how your ET's and MPH's are all over the place ... ie: your ET comes back down but your MPH hangs half way ???
For some reason my feeble brain is putting the cross hairs on your heads ... when you changed the intake, did you look to see how the old intake lined up with your intake ports ??
I ran your combo through dyno 2000 for kicks, I know it isn't exact by any means, but it will give you some good reference points if you're careful with inputs. I'll come back and post the results after i have run a few different changes

This is helping me by the way because your combo is so similar to what i'm putting together ... it has already caused me to toss my original stall speed idea in the trash ... wayyy off lol

[HotRoddin]

Well at least in desktop dyno your cam seems to want 4 degrees of retard, and for sure wants the headers open ????

still baffled

[88workcar]

If the car is capable of 104mph, that is mid 12 mph with an automatic. I would work on 60ft and get it to where the mph and et are right for an auto. What is the 60ft, 330 and 1/8. I have a 5 speed, last time out was a 12.85 @ 102, 60ft was 1.86.

[82 GT]

Here is my best E.T slip

60'---1.94
330'---5.623
1/8----8.606@82.16
1000'--11.199
1/4-----13.400
mph-----102.19

[82 GT]

HOTRODDIN....I'll post the info you asked for later today.

[82 GT]

HOTTRODDIN...I sent you a PM

[88workcar]

60ft is killing you, what do you cross at (RPM)?

[82 GT]

I'm crossing the traps at around 5500.....about 500rpms less than my 6000 redline. That's what I want...right?

[88workcar]

If you cross at 5500 the gear-tire is close, go with more converter

[82 GT]

I'm not sure what you mean by gear-tire.

Originally Posted by 82 GT

I'm not sure what you mean by gear-tire.

He means that your rearend gear & tire height combo are close to getting you through the tracks at the optimum rpms. A 1.94 60' is where your problem lies IMO. Are you running slicks? I see you have subframe connectors, but do you have any traction devices, like traction bars or boxed upper/lower control arms? If you can cut your 60' down to a 1.70...you'll be in the 12s easy.

[82 GT]

I run slicks and no other traction device.

Wow. Your 60' should be WAY better than 1.9s with drag slicks. I take it you don't have a trans brake? Even without one though...you should be able to put your foot on the brake and bring the rpms up to 2000-2500rpms before the converter begins grabbing and the car inches forward. I'd say work on your launches. What rpm are you launching your car at? Do you heat your slicks up enough? What tire pressure are you running on your slicks?

[82 GT]

My converter is rated 2400 stall but I'm lucky to get 2000 out of it before the car moves. I know I need a better converter because on the street, it has trouble idling in gear at lights...it doesn't like to idle in gear at all...LOL

BTW, I run about 12 lbs of pressure in the slicks.
I also do a nice burnout...John Force would be proud of me.

Yeah, a higher stall would definitely benefit you. A friend of mine has a '99 SS Camaro with a 3800rpm stall that surprisingly enough is very streetable because it locks up after about 35-40mph regardless of how much throttle he's giving it. A higher stall would allow you to launch at a higher rpm also. Because...no offense, but a 1.94 is more like a decent 60' time on radials.
As for the slicks. You could actually run them a little lower than 12psi., especially if you do a "John Force" size burnout, lol. Because the more you heat them up, the more the pressure raises, because they increase in temperature after the burnout.
I usually run 9 or 9.5 psi. in my drag slicks. I too do a pretty healthy burnout. My slicks jump up to around 11-12psi. after I do the burnout. So, in theory...after your burnout your slicks could be jumping up to 14-15psi. It really helps to have someone checking your tire pressure for you before & after the burnouts.