Blowing through converter??

[anniversaryss]

1997 LT1, heads/cam, 4l80e w/3800 stall speed, dana 60 rear with 3.73 on a 25.7(stock size) tire, Procharger with 14.5psi and e85.
Converter is a Protorque Prodrive series single lock up anti ballooning plates and so on, it was originally ordered when I was running nitrous.
I did a dragy run and trapped 127mph. I use blucat to get a general guide on shift scheduling and its been pretty accurate. The issue is my shift at 6400rpm from 3rd to 4th is 116mph. That leaves me into 4h gear for 11 mph. i feel like it has more if staying in 3rd.
It looks like blucats values include real world converter slip and shift leads on an UNLOCKED converter in the values and this is why my shifts at 116mph. My shifts are dead on with his values so it seems to be doing as it should in my uneducated opinion. Now if Input the converter to LOCK in third gear it will now go to 130mph top of 3rd assuming there is little to no slip. I am worried about even trying to lockup a single disk. I can run a 28" tall tire to get the same results.
Few people have said I am blowing through my converter. Is there a way to tell by said log whether this is true? I am logging TCC slip rpm/ratio and my shift extensions from 6400 to 5400ish. I just added input shaft speed channel I will be testing later today.

thank you,



DragyRun.hpl
2025 Current TPS Change stock stoich_shift lead3VE rev2.hpt

[bk2life]

Is there a way to tell by said log whether this is true? I am logging TCC slip rpm/ratio and my shift extensions from 6400 to 5400ish. I just added input shaft speed channel I will be testing later today

add all the trans slip channels and log it.
Id delete everything else so youre only seeing engine rpm and then everything the trans does to not clutter anything up.

[edcmat-l1]

You're not blowing through the converter. The people telling you that don't know what it means.

If you want to lock it in high gear call the converter company and ask them. Some of the better single discs can be locked at HP levels comparable to yours. I've done a bunch. It works get. It's just like another shift. It'll feel and sound like a shift.

[anniversaryss]

You're not blowing through the converter. The people telling you that don't know what it means.

If you want to lock it in high gear call the converter company and ask them. Some of the better single discs can be locked at HP levels comparable to yours. I've done a bunch. It works get. It's just like another shift. It'll feel and sound like a shift.

Thank you. Yes I've planned on contacting the converter company.
How can you tell from my log I am not blowing through it?
It doesnt feel like I am. The car doesn't dog and it pulls well.

[RDF1]

I would rather run a taller tire or higher rear gear to keep it in 3rd gear and a better TC to be able to lock it up in the top of 3rd at around 100mph.
If you were blowing thru the converter you wouldnt have such large shift extensions (900 rpms 2-3, and 700rpms 3-4).
Blowing thru would just hang the rpms after the shift.

[edcmat-l1]

Blowing through a converter happens almost always from a holeshot. That's when it's under the most load. A 600 hp engine isn't blowing through a converter at the top of the shifts.

Blowing through a converter is pretty much the same as blowing through a clutch. You'll have RPM spikes instead of slopes when looking at your line graphs versus speed.

A decent RPM drop after the shift means the converter is on the tight side. There are plenty of drag cars that launch and you can barely hear them shift. That's a loose converter. Doesn't mean it's blowing through it.

[abc]

There is a good chance that converter is not gonna get it's best couple until 6800 rpm or after.

Call the company and ask them if you should attempt the WOT TCC engage with your combo, they should know. Obviously, a good triple disk will handle what you what to do.

[anniversaryss]

This is a pull I did a few hours ago. I added Trans input shaft speed. Honestly prob didnt need it, seems to line up with TCC slip RPM

third gear pull.hpl

[anniversaryss]

I agree. The slip is less and less as the rpm rises. I may raise my shift rpm at some point.

[anniversaryss]

There is a good chance that converter is not gonna get it's best couple until 6800 rpm or after.

Call the company and ask them if you should attempt the WOT TCC engage with your combo, they should know. Obviously, a good triple disk will handle what you what to do.

You seem to be correct. Went to 66-6700 the tcc slip was lesser as the rpm.went up

[edcmat-l1]

You seem to be correct. Went to 66-6700 the tcc slip was lesser as the rpm.went up

That's how converters work.