Help me find a torque converter please
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Propwash
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Wondering the same... Unless you plan on your motor's torque peak RPM to be around 5200-5800+ RPM and you got some crazy drag race gearing, a stall that high would turn a street car into an absolute slug, not to mention it's driveability would be horrible. Just as a comparison, my 512 makes peak 696TQ at 4000RPM w/3.91's, #3800lb car and i'm running a PTC converter w/flash stall about 3400-3500RPM. Unless you're building an all out drag car, IMO, I wouldn't go with a stall that high. But If you are building a car just for the strip, call up a few Torque Converter MFG's like Dynamic, PTC, Coan ect..ect... and go over a Spec sheet with them for your specific needs. Tire size, weight, gearing, cam, torque/HP curves, carb cfm ect..ect... all go into picking out the proper converter. Buying one off the shelf is just a guessing game.
Here's an example of a spec sheet:
http://www.ptcrace.com/spec-sheet-pm-23.html
Chryco69
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I am just going by what my engine builder said. He recommended a 4500-5000 stall and a 4.30 gear. I said the same thing but he builds crazy fast Mopar and is well respected. I was going to go with a 3200 stall....
Propwash
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So what's your plans? Street, Strip or both?
Here's a little RPM calculator for you if you want to see what kind of RPM you'll be spinning at certain MPH. Be helpful if you're thinking along the lines of a Street or a Street/Strip car.
http://www.coastdriveline.com/htmlfolder/calculator2.html
Here's a little RPM calculator for you if you want to see what kind of RPM you'll be spinning at certain MPH. Be helpful if you're thinking along the lines of a Street or a Street/Strip car.
http://www.coastdriveline.com/htmlfolder/calculator2.html
womanator
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Here's what I have in my race car.
493 ci.
Roller cam-big
Indy SR. heads
727 trans.
4.56 rear gears.
No engine dyno numbers.
But chassis dyno shows 698 off the juice in high gear.
The converter is a 4000 rpm.
3900 rpm launch chip puts the car on the bumper.
I went to a 3600 chip and the car only rises 12-14 inch's at the launch.
I would be very careful about going to that big of a converter.
Alot of people go with too big of a stall or not enough gear.
Last Sunday we tried a 3000 rpm launch chip and the car bog'd bad and then went to the 3600 the next pass.
3900 chip.
3600 chip.
Hope this helps.
493 ci.
Roller cam-big
Indy SR. heads
727 trans.
4.56 rear gears.
No engine dyno numbers.
But chassis dyno shows 698 off the juice in high gear.
The converter is a 4000 rpm.
3900 rpm launch chip puts the car on the bumper.
I went to a 3600 chip and the car only rises 12-14 inch's at the launch.
I would be very careful about going to that big of a converter.
Alot of people go with too big of a stall or not enough gear.
Last Sunday we tried a 3000 rpm launch chip and the car bog'd bad and then went to the 3600 the next pass.
3900 chip.
3600 chip.
Hope this helps.
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Hughs has a calculator... just have the shop get you what they recommend. 5500 stall so peak power at 8500 and red line at 12,000 trying to get under 6seconds
Mr Belvedere 30144
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If this is a total drag car then let them spec the TC if you plan on street driving or worse freeway the you are way off base on gears and TC.
I run q 440 6 pack with larger than stock cam and 3:55 gears with a 2500 stall. This combo makes for an all around excellent street machine.
I run q 440 6 pack with larger than stock cam and 3:55 gears with a 2500 stall. This combo makes for an all around excellent street machine.
womanator
Well-Known Member
Was trying to show that most people over stall there cars.
14-1 comp
over .700 lift
Still 4000 stall.
Think total combo.
There's not enough info here to do anything except to recommend a company.
If that's what you want just pick a reputable one.
14-1 comp
over .700 lift
Still 4000 stall.
Think total combo.
There's not enough info here to do anything except to recommend a company.
If that's what you want just pick a reputable one.
Mr Belvedere 30144
Well-Known Member
Hughes is a good one.
65 Plymouth Satellite 426
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Try Richard Lupo At Dynamic Torque Convertors In Delaware! Best In The Business!
What does your converter flash to? I run both Ultimate and PTC converters. 2 different combos. Both are 9". The PTC flashes to 5300 and is very driveable on the street (11.0@123). The other doesn't get street driven. 15-1, 572, 4.10 gear (9.25@147). Stall rating means nothing. Flash speed, torque ratio, and slip. Give Lenny at Ultimate or Kenny at PTC your engine specs and they'll set you up.
Doug
womanator
Well-Known Member
Wasn't trying to get in a disagreement here,but no one asked the right question.
When I was running fast,we weren't worried about flash speed .torque ratio and slip.
We were worried about how much clutch engaged on the hit and how soon the clutch would fully engage.
It's always smart to ask questions.
As far as my flash point go's I just called Coan and gave them my combo and they told me not to use over a 4000 rpm chip to launch.
My car has gone a best of 8.98 at 153 mph but I have dialed it down to 9.60's to 70's because I have another driver and it's not as hard on the car.
I'm not able to race the car anymore and I still had sponsorship obligations to deal with.
Friends.
When I was running fast,we weren't worried about flash speed .torque ratio and slip.
We were worried about how much clutch engaged on the hit and how soon the clutch would fully engage.
It's always smart to ask questions.
As far as my flash point go's I just called Coan and gave them my combo and they told me not to use over a 4000 rpm chip to launch.
My car has gone a best of 8.98 at 153 mph but I have dialed it down to 9.60's to 70's because I have another driver and it's not as hard on the car.
I'm not able to race the car anymore and I still had sponsorship obligations to deal with.
Friends.
So w/o a chip it would flash to 5500+. Mine flashes at 5700 but I leave at 3000. Man if i could afford it, I'd trade for a stick in a heart beat. I'd love to be 3000lbs or less. My motor with different intake and less lift cam went 8.07/169 in a 2450lb carWasn't trying to get in a disagreement here,but no one asked the right question.
When I was running fast,we weren't worried about flash speed .torque ratio and slip.
We were worried about how much clutch engaged on the hit and how soon the clutch would fully engage.
It's always smart to ask questions.
As far as my flash point go's I just called Coan and gave them my combo and they told me not to use over a 4000 rpm chip to launch.
My car has gone a best of 8.98 at 153 mph but I have dialed it down to 9.60's to 70's because I have another driver and it's not as hard on the car.
I'm not able to race the car anymore and I still had sponsorship obligations to deal with.
Friends.
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