ATF any real world experiences with Loosing up a convertor?

[Eric Merryfield]

Test Pig:

The mighty Gremllin, currently running Amalie Type F, which per their spec sheet says is 10-20 weight.

Per the chasis dyno wants 500 looser on the RPM, which is obviously a ton, and not going to happen with just fluid, but with a low HP beast like the Gremlin, we might see more of an effect of the fluid than say your standard 635 HP 396 stocker.......

Reflashing this convertor, too risky. Have a known good enough thing here.

I know just about all the info on the site is about using thicker fluid to lower stall, I'm looking to increase stall as much as possible.

I believe specific gravity is likely the ultimate factor in stall,

So for my type F, using the formula, 141.5/API of 31.5 plus 131.5=.8498

a thinner fluid like their Dexron VI syntethetic with a API of 35 would be a .8681 SG

This is 1.0215% thinner than the type F.

The ATI 0w-8 weight might be a option, I know there are other synthetic fluids out there with real thin weights.

Eric

[SSDiv6]

Originally Posted by Eric Merryfield

Test Pig:

The mighty Gremllin, currently running Amalie Type F, which per their spec sheet says is 10-20 weight.

Per the chasis dyno wants 500 looser on the RPM, which is obviously a ton, and not going to happen with just fluid, but with a low HP beast like the Gremlin, we might see more of an effect of the fluid than say your standard 635 HP 396 stocker.......

Reflashing this convertor, too risky. Have a known good enough thing here.

I know just about all the info on the site is about using thicker fluid to lower stall, I'm looking to increase stall as much as possible.

I believe specific gravity is likely the ultimate factor in stall,

So for my type F, using the formula, 141.5/API of 31.5 plus 131.5=.8498

a thinner fluid like their Dexron VI syntethetic with a API of 35 would be a .8681 SG

This is 1.0215% thinner than the type F.

The ATI 0w-8 weight might be a option, I know there are other synthetic fluids out there with real thin weights.

Eric

Try the ATI fluid or Dexron III which is about 10W viscosity.

[Bobby Fazio]

I have been researching this along with engine oil. I have been focused on viscosity index and kinematic visosity in cSt at 104 degrees F and 212 degrees F. Most manufacturers have data sheets. I haven't been paying much attention to the spec gravity but I will now. ATI Super F 20wt is lighter than Amalie Type F by a few numbers. Red Line makes a lightweight racing ATF that is much lighter than both of them. ATI makes 8wt but can't find numbers on it.

[Glenn Briglio]

Buy another convertor that is looser

[GTX JOHN]

We routinely adjust Convertor stalls without problems

[Bob Mulry]

I almost hate to admit how screwed up I am......

When we went chasing performance in converters, I would order an exact duplicate of what was in the car and then A-B, B-A test and then compare them at a test session. If they performed exactly the same then I would send the oldest converter back to be “adjusted”

If the “adjusted “ converter didn’t pick the car up then it came out and we tried something different

That way you never lost what you had and that worked with Q-Jets too...

No computers just 1320’ and a time slip...

Marv Ripes was a way ahead of the curve when he said load up your car and come down to OCIR for a test session with 60’ clocks...

He said bring work clothes and he sat at a card table with the first 60’ clocks that I had ever seen...

We worked our butts off and ran 5 or 6 different converters through the race car that day and I would like to add it was a productive day

[jmantle]

Hi Eric, I'm currently running Dex VI in the Pacer, have tried Dex 3 and the high viscosity Allison TES295 fluid in the past. Never saw a noticeable difference in stall speed between the 3. PM me if you like, I'll fill you in with whatever I can.

Jim Mantle V/SA 6632

Originally Posted by Eric Merryfield

Test Pig:

The mighty Gremllin, currently running Amalie Type F, which per their spec sheet says is 10-20 weight.

Per the chasis dyno wants 500 looser on the RPM, which is obviously a ton, and not going to happen with just fluid, but with a low HP beast like the Gremlin, we might see more of an effect of the fluid than say your standard 635 HP 396 stocker.......

Reflashing this convertor, too risky. Have a known good enough thing here.

I know just about all the info on the site is about using thicker fluid to lower stall, I'm looking to increase stall as much as possible.

I believe specific gravity is likely the ultimate factor in stall,

So for my type F, using the formula, 141.5/API of 31.5 plus 131.5=.8498

a thinner fluid like their Dexron VI syntethetic with a API of 35 would be a .8681 SG

This is 1.0215% thinner than the type F.

The ATI 0w-8 weight might be a option, I know there are other synthetic fluids out there with real thin weights.

Eric