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Discussion Starter #1
Well I got a new converter after I toasted the old one, it was supposed to stall around 4800 put it in and topped off the fluids and on the brake it stalled 4000 so I called Trans-Specialties they said send it back and they would restall it to around 4800. Sent it back and had it restalled and UPS delivered it back to me this morning, I was excited thinking it was going to be a lot higher on the brake put back in topped off all the fluids put the button down and bam 4000 right where it was before? I'm totally confused as to what the deal could be here? Any ideas short of the moron doing the restall just didn't do it? Thanks in advance I'm going to have a few beers to drown my sorrows! :(
 

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Have you tried calling Coan Racing Transmissions? Seems to me, they said that isn't a proper way to test the converter. Give them a call.

www.coanracing.com

I run their tranny and converter.
 

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badass70_nova said:
Well I got a new converter after I toasted the old one, it was supposed to stall around 4800 put it in and topped off the fluids and on the brake it stalled 4000 so I called Trans-Specialties they said send it back and they would restall it to around 4800. Sent it back and had it restalled and UPS delivered it back to me this morning, I was excited thinking it was going to be a lot higher on the brake put back in topped off all the fluids put the button down and bam 4000 right where it was before? I'm totally confused as to what the deal could be here? Any ideas short of the moron doing the restall just didn't do it? Thanks in advance I'm going to have a few beers to drown my sorrows! :(
Sounds like they didn't re-stall it :confused: Could also be the moron that did the install :beat: :D
 

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I sent the converter I am using now back to JW and had it lossened up another 400 RPms to 5900. I got it back and when I got the motor back in it stalled at 5900 against the brake. The weather was cool then but now that we are in the 90/100 range the best it can do is 5600. The hot air is just so bad the engine isn't making as much power. You aren't fighting that issue are you? RM
 

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Well the converter I had originally was a Transmission Specialties 10" that stalled at 5500 and we had to leave on a 2 Step at 4800 because that's where the car would actually hook up. Anything over that and it would just break the tires loose and chatter. After that one got toasted the one I bought was a Cadillac North Star Converter made for Nitrous, Turbos and ProMod Cars and it was good for motors making over 1200HP. When I first put it in stalled at 4000 and of course the car left like a pig and only 60' of 1.50 and it went a 6.48 @ 113 so the MPH was there. After getting it back from being restalled another 1000rpm so it would leave around 4900 to 5000 yesterday at the track on a somewhat similar day weather wise the car went a 1.63 60' 6.64 @ 103 1/8th and a 10.41 @ 135. I called them today and they said to send it back and they would TRY again. I was like F you your try again. So I called up Competition Transmission and ordered another one and hopefully I'll have better luck with this one.
 

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I have personally used Coan, JW and whatever Greg Slack calls his converters Converter Design Specialist, with no regrets or problems. I did buy a JW back in 1993 and it broke the first time out with the car. They fixed it for free and paid the shipping both ways. Back in the 70s Coan made the only converter in the country we could not break using trans brakes. If there were others we never found them. I can say Coan, JW and Slack have been good with me. I can't speak of anyone else but I have heard some stories that get the blood boiling. So I stay with those who have served me well. RM
 

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I agree, Coan is one of the best manufacturers out there building convertors. Ask for Art. Also, they say the way to test your stall, and it;s not putting it to the wood, is to make a pass and when you shift the car, look at what your rpm's drop to on the shift. That is what your stall is. Dave
 

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I had the same problem with a convertor that I thought was broke. I sent it off to TCI and ask them to loosen it up 500 rpm and when I got it back that thing wouldn't stall what it had before. I was hot:mad: after that. Do you want to sell the other convertor now? The one I have in my race car is a 3000 and I need a 4000 for my new motor.
 

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Discussion Starter #9
I'll sell it.... I paid $1395.00 for the thing and I'll take half of that for it if you want it.......It's a spragless 10" that's good up to 3000hp and it also has the large bolt pattern to work on dual pattern flex plates.
 

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whats up with the spragless design? I have heard alot of bad stuff about that type of convertor not having a stall speed as adverstised. I'll read up on it and get back to you. Thanks
 

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If you have that sort of money in that converter I would get them to make it right one way or another or sell it. I paid about 900 for my latest converter and it was everything I was looking for. Curious as to why you bought this unique converter. My converters are 8 inch except for this last one which is a 7.8 steel stator. Your converter sounds like a big motor on the jug type converter not really what the average guy uses. RM
 

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Scott, I wish I had an answer for ya! If I did I'd have fixed my own problem. I had a 4000 stall TCI in mine an it sucked, 60ft was 1.47 footbrake, so I bought a ProX 5000 10in an it stalls about 3500 footbrake an 60ft dropped to 1.8. Never thought it could happen! I called TCI an the said take it out an send it back an they will trade for another with higher stall. It seems my motor lacks torque to bring em up to the stall they claim, they tell me to spray it off the line but I don't want that all the time, shouldn't have to use nitrous to move a 950hp motor off the line, so I'm sitting waiting right now too. Ever see a car run 1.8/60ft an trap 145mph? Rediculous,haha!!!
 

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Discussion Starter #13
I know what yer sayin' Don! I had a 1.60 short time with a 151 trap time!

RM, on the jug as you say the motor is making around 1200+ HP so yes this is a not so average converter. I'd rather just get rid of the thing then keep dealin' with them guys down there, I already have $150.00 in UPS charges to get this thing back in forth so they could TRY and make it right.......
 

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TCI is gonna send me a 9.5in Pro-X converter, they don't even list it on their site. They claim it will give me the extra slippage I need off the line with a footbrake an still lock down when I spray. I still think it'll be too tight down low, We'll see????? My motor is guttless below 5000rpm an a nitous converters lower stall an a footbrakes higher stall requirements makes it a difficult match. Rossler, TCI, an others tell me to just spray it hard everytime but thats not what I want to do with it, they say ya can't have 2 kinds of converters in one setup but I did with the smallblock an this thing will to sooner or later. I guess thats why some Pro-Mods run a clutch setup for the launch.
 

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My friend has a 10.5 outlaw car. He runs a BBC blown with twin dominators and 3 systems. He bought one of those converters that comes apart so you can change the stall on at home. It's a struggle for you guys with lots of HP then you add the jug to complicate things. Hope you can get it worked out. RM
 

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I had a similar problem with trans specialties. I had a perfectly working converter that I sent back just for a refresh and stall change. They said the sprag had gone bad and suggested converting it to spragless. So I did, mind you I paid $800 for the converter 4 years ago, so I spent another $450 to have it converted to spragless, and freshen up, stall increased by 500 rpm. I got it back, the stall was exactly the same, my I loss .4 & 3 mph. They swore there was nothing wrong with the converter. I sent it back again, they verified it was right and re-adjusted the stall speed. The 2nd time the stall flashed 1300 higher then before and the et was killed, nearly 1 second. Once again they claimed the converter was on the money. I installed a used one from Pats Converters, my ET actually was about .1 better then I originally had. So I sold that POS.

If anyone can fix it, I would say Pats Converter in PA could.
 

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I knew ther was someone on the site that had trouble with a spragless converter and I didn't know who it was. If thats the case with goin spragless I'll just stay away from them.
 

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I don't get it Scott - you bought a nitrous converter and running on the motor? It's not going to stall much with those, 4000 is about right.. Put the spray to her!
 

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Discussion Starter #20
John we did with a 250 shot and it only went 2/10ths faster but with a 9 MPH increase. We went from running a 9.40 all motor with old converter to running a 9.22 with a 250 shot with the converter I'm talking about. Either way got the new one dropped in last light from www.competitiontransmission.com and it stalled at 5600 so that's just about perfect!
 
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