Converter help!

[1320racer]

Originally Posted by Jason Shepard

I had a new converter made for me last August. Filled They set the stall at 6800. Put it in the car, and immediately was faster. Ran the car all last fall with no issues, it stalled right where they said it should. Around 20 runs later, into this spring, i couldnt get it to stall past 6400-6500. The car slowed down 3 tenths. I called, they said send it in.

In the mean time, ihad them build me another one, with new spec sheet. Built a new one that stalled around 7000. Immediately the car went back to running fast, maybe even a little faster. I called about the 1st converter, and they said they "really didnt find anything wrong with it" They freshened it and sent it back

After around 20 runs on the 2nd converter, stall speed is back to 6400-6500, and the car is 3 tenths slower again.

Jason

With the 1st converter You stated “they” set the stall to 6800, did you check it and how are you checking it, then and now?

Also what is the weather data with the fast runs vs. the slow runs and lower stall? Are these fast runs and slow runs all at the same track?

[Woodfin]

Speaking of Lenny at Ultimate, I may be out of the loop but I though Lenny had sold to a long-time employee, Ragland. Is this correct?

And my experience with both Lenny and Ragland has been top shelf. Anything they have built for me has been exactly as expected.

[Jason Shepard]

Originally Posted by 1320racer

With the 1st converter You stated “they” set the stall to 6800, did you check it and how are you checking it, then and now?

Also what is the weather data with the fast runs vs. the slow runs and lower stall? Are these fast runs and slow runs all at the same track?

"They" being Coan. They built it to stall at 6800. I log everything with my Holley efi.

I compared my log books and weather data. When they were working correctly, weather conditions varried stall speed by 100-150 rpm. Same thing when stall speed was 500 slower.

I have had fast runs and slow runs at the same track.

[1320racer]

…….

[1320racer]

If you say so but it’s very hard to believe that you had 2 converters built by the same company and after the same number of passes they both loose the same about of stall rpm.

I say either your interpretation of your data is flawed or you’ve got another issue that is resulting in your converters loosing stall rpm. Do you have a data logger?

What does Coan say?

[Jason Shepard]

Originally Posted by 1320racer

If you say so but it’s very hard to believe that you had 2 converters built by the same company and after the same number of passes they both loose the same about of stall rpm.

I say either your interpretation of your data is flawed or you’ve got another issue that is resulting in your converters loosing stall rpm. Do you have a data logger?

What does Coan say?

I find it very hard to believe also. Im not placing blame anywhere, and its very possible something in my car is causing this. Im just looking for ideas.

Coan makes a ton of converters, and communication with them has been top notch. They didnt have any solid answers either.

I put converter #1 back in my car for this upcoming weekend, so I will see how it works.

Yes I datalog through my Holley. Converter slippage when it works is between 5-6%. When they are not working, its between 9-11%

[Proline]

Jason sorry im a little late to the party but i have had this exact problem and have a definite cure. Call 586-469-1140 this company makes a product called a Equalizer that will make ALL your converter problems go away.

[Greg Reimer 7376]

I know this sounds a bit basic, but what about the ATF? Could it be changing viscosity or breaking down somehow with use? A simple fluid change would be something to try.

[Jason Shepard]

Originally Posted by Greg Reimer 7376

I know this sounds a bit basic, but what about the ATF? Could it be changing viscosity or breaking down somehow with use? A simple fluid change would be something to try.

I did think of that also. I put converter 1 back in and changed fluid for this weekend. I usually change fluid about every 40 runs. So I will see how it works.

[Jason Shepard]

Originally Posted by Proline

Jason sorry im a little late to the party but i have had this exact problem and have a definite cure. Call 586-469-1140 this company makes a product called a Equalizer that will make ALL your converter problems go away.

Ive heard some amazing things about that product! Ive heard that product helps people who have allergies to red fluid..