ok i was reading around and for an auto trans the stock stall for the torque converter is 400. now lets say i bump it up to 800 or 1000? (no higher then 800 if i stay N/A) and how much torque would be gained? N/A engine (K&N air intake)? turbo engine (with 57 trim CT-26 turbo)?
torque converter
- Thread starter zby67
- Start date
umm, yeah, no... huh? That didn't make any since..
Service manual says the stall speed for N/A's are 2200 rpm, and for Turbo models 2500 rpm.
My stock Torque converter stalled about 1900 before starting to spin the tires. I had mine re done and now stalls at 2500 rpm.
You won't gain any torque from it.. That is just the stall speed.
Service manual says the stall speed for N/A's are 2200 rpm, and for Turbo models 2500 rpm.
My stock Torque converter stalled about 1900 before starting to spin the tires. I had mine re done and now stalls at 2500 rpm.
You won't gain any torque from it.. That is just the stall speed.
yeah my stock one stalled about 1900 before starting to spin the tires.. Just going off what the TSRM states. Ill edit my post
You do actually pick up some torque with a High Stall, a TC is a torque multiplier, it only multiplies while there's a difference in speeds across it ie: Slip, once it hydraulically "locks" you pretty much back to 1:1.
My 7M with stock stall speed even with 500+ rwhp was a SLUG off the line, fitted a 2800 Histall and the car was transformed and stupid fast from a dig.
My 7M with stock stall speed even with 500+ rwhp was a SLUG off the line, fitted a 2800 Histall and the car was transformed and stupid fast from a dig.
zby67;1732135 said:
Ummm the car would be less of a slug on launches, think of it as slipping a clutch on a manual car to get the RPM's up where the engine is making good power as opposed to a granny start.
IJ.;1731982 said:
The book says 2500, and I haven't seen it. Mine is also about 1900. That will cut about 2.667 60' with a turbo that comes in about 2500, and is pulling hard at 3500.
Nick M;1733132 said:
Thinking the book is talking about a "flash stall" and not a hard stall on the brakes Nick, ie: Stab the throttle and it'll go to 2500 for a split second but does pull back to 1900ish when fully loaded, flashing my 2800's give me closer to 3500 but it takes a good set of tires to hook up this way as it shock loads the chassis, I could break the 7m loose at just about any speed up to 60mph if I did this with TRAC off.
Toyota claims 2500 if you put your foot on the floor with the brakes applied. Mine won't. It will crawl over 2000 and slowly rise after the flash. I always get off the throttle after it reaches the stall. I don't have a large cooler installed yet. Shame on me.
With the stock stall I was cutting 1.8 60 ft's E-brake pulled full and hard on the brakes. It would go to about 2800 and I would launch. Now I have a "loosened" converter that I can launch at about 3500 which gets me well into the power range. 1.6 60ft's all day long with the MT Slicks
Nick M;1733159 said:
Same same, mine would try to drive away doing this with the stock convertor, I played around with Launch Control in the MoTeC with the HighStall and there was no way in hell I could hold it on the brakes as the vaccum in the boosted bled off the car just drove away.
How do you test the stall? If i puch it say from a stop sign right befor 2k rpms (1700-1800 rpms) is when i gain power and i clime in speed faster. Now with a stick ether w87 or R154 how would do this or does a stick have a torqu coverter? I dont know much about sticks. And barrly know how to drive one.
With a stick your left foot is the torque converter, press in the clutch and rev the engine to desired rpm range then let go.
Manual transmissions use a flywheel and clutch instead of a TC.
Manual transmissions use a flywheel and clutch instead of a TC.
SupraCorwin;1733556 said:
Not really. A torque converter mulitplies engine torque. A manual trans does not. The converter has a built in stall speed from the design, but it also reacts to the input torque. The more torque it is fed, the more the you get out of it. A properly built auto will whip a manual with the same gear ratios every time. Properly built means it has performance in mind, not comfort.
Nick M;1733645 said:
I was only giving that example to Zby67 for a manual tranny's relation to stall speeds... Obviously a auto has many more differences then a manual.