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Anybody tried with different viscous atf fluid to alter stall speed?

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Ben-Stian

15+ Year Contributor
131
29
Aug 23, 2006
NORWAY, Europe
I just checked the viscous for some atf fluids, and the regular Hy-Gard have about 9 cst@100 degrees celsious. Redline Racing Lightweight 4.9 cst@100 degrees celsius.
Say it have a flash stall @3000 rpm with Hy-Gard (cst 9), how much higher flash stall with Redline Lightweight (cst 4.9)?
Anyone tested different oils and willing to share?
Thanks
 
What converter are you running? The viscous of the ATF will affect stall speed and the stall RPM. When I was deciding on which fluid, I found people running v8 setups that swapped to the HyGard and lost 600 rpms of stall. I can't put a specific number on what you may experience (maybe someone has tested it) but I would expect a small change, maybe 100-400 rpm difference.
 
What converter are you running? The viscous of the ATF will affect stall speed and the stall RPM. When I was deciding on which fluid, I found people running v8 setups that swapped to the HyGard and lost 600 rpms of stall. I can't put a specific number on what you may experience (maybe someone has tested it) but I would expect a small change, maybe 100-400 rpm difference.

Ok thanks
Running PI#7
 
I noticed no difference using hygard vs regulard atf vs redline lightweight atf. Fluid temp made the difference (stalling from 110*F vs 190*).

Ok thanks. I would believe there should be a little difference. Do you have logs of the various results?
I do not have nitrous. If I have problems with stalling up, I will either get a #8 or try to convert to Mivec which should help a lot.
What rpm/boost do you guys leave off the line with 26" QTP and what is your 60 ft?
 
Ok thanks. I would believe there should be a little difference. Do you have logs of the various results?
I do not have nitrous. If I have problems with stalling up, I will either get a #8 or try to convert to Mivec which should help a lot.
What rpm/boost do you guys leave off the line with 26" QTP and what is your 60 ft?

Swapped to 26" QTPs and burnt a valve my first run haha On street tires I was leaving at 4k and netting 1.5's. I decided to increase the launch to 4200 when I upgraded to the 26" but like I said, it broke during the shakedown run.
 
Swapped to 26" QTPs and burnt a valve my first run haha On street tires I was leaving at 4k and netting 1.5's. I decided to increase the launch to 4200 when I upgraded to the 26" but like I said, it broke during the shakedown run.

Thanks.
Are you limiting boost as well as rpm? What boost do you leave at? What turbo? PI #7?
 
Thanks.
Are you limiting boost as well as rpm? What boost do you leave at? What turbo? PI #7?

I'm not limiting boost but it is consistent when controlling the launch limiter with the ARC-2, I want to say it launches with 15+ psi. I will have to check my logs to see what I am specifically launching at. I am also swapping to an electronic boost controller so I can play with different boost pressure at launch easier.

I have the DSM HTA76. When I ordered the PI converter, they asked me the rpm launch goal which I told them 4200-4400. I was never told which specific converter it was.
 
Ok thanks:)
 
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