torque converter=less power down track?

[wishigotan8]

First off I dont know if i woudl have better luck with this in the drivetrain section, but i figured I try posting it here first becuase i have slips from it. Has anyone here put in an aftermarket torque converter and had it slow the car down? I installed a 2,800 stall and it helped out my launch alot but by 1/8 mile i was slightly slower than usual and at the finsh line i was at least 5 mph slower and a slower time than before I had the trany rebuilt. Any ideas why this would happen...maybe the converter is too tight..I have no other ideas. here are slips from runs before and after the rebuilt trans.

w/o rebuild & stall..average air

60-2.349
1/8-9.95 @ 71.21MPH
1/4-15.63 @ 86.42MPH

With stall...bad air
60-2.026
1/8-9.837 @ 67.67 MPH
1/4-15.68 @ 82.28 MPH

The car shifts fine...any suggestions are appreciated..thanks in advance.

[12secondv6]

Edge converters suck!

I've said it time and time again.

Poor effeciency and STR.

I've run ProYank 3200 which knocked off 0.7 ET wise and gained 1-1.5 mph
Effeciency = 95.5% - 96% at 5,800 rpm's
STR = 2.8

My SuperYank 4200 has not been tested yet.
STR is in the realms of 2.6-2.8
Effeciency is not known exactly... but in the mid/high 90's

Air is a big factor too.

Your 60's show reduction... which is good.

Try a good/ average air day for true results.

Low effeciency converters (edge ones particularly) will lose MPH

[99v6cam]

what do you mean by average air and bad air. if you mean like temp and humidity youre slower time is caused by that and that alone. Your trap speed may be slower if you keep traction better off the line with the convertor but you shouldnt be any slower time wise.

[wishigotan8]

the traction is the same..i've drag raced for years...this is not from only air temp and humidity, the air did suck when i ran with the new converter in, but its not the only cause of a 5 mph loss and slower et after the 60 ft mark. Maybe its an effiecency problem...or maybe its to tight of a converter I was just wondering if anyone else runs these converters and had similiar problems

[Shirl]

Maybe the converter just sucks. I had issues with 2 aftermarket ones and wasted a LOT of money. In fact both were exactly what you are experiencing: the car went slower. And it was considerably slower, like you are saying. These weren't ET's/mph that could be attributed to conditions, so I know exactly what you're talking about. Most companies agree to a one-time stall change, ect, ect. but then it's more money and hassle between removing (or having someone do it) and shipping and re-installing and testing it out again. It gets ridiculous after a while. But it IS an option. I'm just happy I went back to the stock converter. The car went 11's with it.

[Camarorulz]

Edge converters don't suck, mine knocked half a second off my time. If I had some good tires my Edge would take me easily into the 14s. I didn't lose mph, I gained ~1mph. My edge has 97% efficiency, not low at all. Your converter really isn't going to improve your trap speed though, the real gain is in the '60 and 1/8: you saw a HUGE improvement in your '60 and a slight 1/8 improvement. I would take it out again in the fall when the air is better, that drop in trap speed is due to bad air, not your converter. 82 mph is pretty low though, I would look into some routine maintenance (i.e. plugs/wires, cleaning fuel injectors, etc.) that could improve your power. Air can make a big difference in trap speed, I've had my traps vary over 2mph in one night, you think a big difference in humididty/temp from one occasion to another can't make a (4.14 mph in your case) difference? Think again, it can.

Just out of curiosity, why did you get the converter? I know I did because I had a crappy 1800 stall that made my car a pig off the line: I wanted something that would get the car going from a stop and it worked. If I had a car with a 2400 stall stock I wouldn't have bothered getting a converter, because, as Shirl said, the stock one will take you a long way.

[ July 04, 2005, 11:57 AM: Message edited by: Camarorulz ]

[njspder]

what was teh air like on each trip to the track? air temp + humidity play a major role in performance.

later
tim

[Arctc Wolf]

My edge has given me good gains over stock. It depends on what you ask for from edge. I have a 96.8% eff. with a 2.55 str and a 3000 stall. I hve stronger pull higher up as well as off the line. I told andre to build me a converter that was tighter up top but still had some multiplication to it down low. This was baed on the fact that I have 3.42 gears also. Andre takes what you tell him you want and makes it. I for one am happy with my converter from edge, he made it the way I knew I wanted it and got the results I wanted.

[ravenp]

I have an Edge and am happy as well. 2800, 96.8%, 2.45str. I went mild because it's a crusing car but have plans for turbo and the added torque from the turbo will adjust the stall number more to 3000-3200.

My 60's went from 2.3 to 2.0, my et from 15.6 to 15.4 and my mph from 87-88 to 86.

My decisision to go Edge was part financial, feedback from other owners and customer service from Andre....all being excellent.

ps... my tires are done. On good rubber I'm sure my 60's would be 1.9 and my et's 15.2-15.3. In other words i dont' believe i've experience the true potential gains of the converter.

[1DangerousV6]

i dont have a converter..but i can tell you about crappy air..on the single stage 175 shot i ran 13.1@98 on a humid as hell day when the temps were in the 90s..a few days later..on the same shot, same conditions, same burnout, etc..but with nice cool and dry air i went 13.1@104 ..when i went 12.8@103 it was a very hot and humid day too..but on the 175 shot..thats a difference of 6 mph right there just due to crappy air/weather

[Shirl]

Andre is a great guy over at Edge (didn't realize this was an Edge converter?!) Call him with the results and if there is a problem, he will make good. If I were ever going to try another converter, it would be his.

[wishigotan8]

I actually did call today and they said this was only the second car ever to complain about slowing down. The only other one happened to be another 97 3.8 i guess. I guess it leaves me with a new question...has anyone had to have had their pcms reflashed for the stall?...besides for KR(I've heard of aftermarket TC causing KR, but im not geting any so thats not the problem.)

[Camarorulz]

Andre asked me what I wanted, I told him, and he had it built...great customer service, the Edge is not your problem, don't give up yet. Bad air can do a lot to mess up your time.

Your converter doesn't have a high enough stall to cause kr.

[ July 06, 2005, 10:37 AM: Message edited by: Camarorulz ]

[12secondv6]

Not one person w/ an edge has impressed me w/ before/ after times to make me want to buy one.

They all have low STR's

Eh, I've made my comments.

[ellik]

there arent many people out there as hardcore as you are to be impressed by. how many stalled cars are there out there? How many of any brand show as good of gains as you do James?

I havent run any times with mine... Ive been building my car out of necessity of parts wearing out, not specifically to drag. Tuesday I will post results with my Edge TC.