PTC 3200 LU Convertor Users

[SCOOBY DOO]

How do you guys like this convertor? What size turbo are you using with it? Any slip percentages at WOT? I'm getting close to pulling the trigger on purchasing one of these. Any input is appreciated guys. Thank you.

 

[TURBO 6]

PM Dusty for any info you need. He has done enough trial and error with both the 2800 and 3200 10" LU.

 

[bison]

What are your goals?

 

[SCOOBY DOO]

What are your goals?

I was hoping to get some info from PTC 3200 LU owners and see how they like it. I was wondering if any of the owners had recorded any slip percentages at WOT.

 

[johnnyttype]

I was hoping to get some info from PTC 3200 LU owners and see how they like it. I was wondering if any of the owners had recorded any slip percentages at WOT.

i guess mine falls in this category... i talked to dusty about some of my passes and he told me that down low the converter was doing well but up top i was blewing through the converter, about 16% slip. it is a pretty loose converter, i never really verified the stall on it, but i will most likely get it tightened up to a 2800 stall somtime...

this was with a JB 6152e turbo. hth

 

[The Darkside]

How do you determine slip percentage @ wot? I've got the PTC 10 inch lock up 3200 & my car feels as though it's slipping at wot...

 

[bison]

I was hoping to get some info from PTC 3200 LU owners and see how they like it. I was wondering if any of the owners had recorded any slip percentages at WOT.

If your car has enough power to run faster than 11.0 the 10" will not couple as effective as a 9.5". If you dont post your goals no one including Dusty will be able to advise on a converter. Slip depends on the converter design and the amount of torque you put into it. The 9.5" in my sig slips 3.5% at 134mph. WIth a 10" in a 3600 lb car that is capabel if 10's id expect slip %'s 0ver 10%.

 

[johnnyttype]

How do you determine slip percentage @ wot? I've got the PTC 10 inch lock up 3200 & my car feels as though it's slipping at wot...

TCI - TECHNICAL INFORMATION: Racing Calculators

use the % converter slip calculator... make sure you put 3.42 for rear end ratio, if that is your's, and 1 for trans. ratio, not 1:1, if you race in drive. hth

 

[norbs]

Why not use a ptc 9.5?

 

[johnnyttype]

Why not use a ptc 9.5?

im guessing he wants to retain Lock Up, 9.5's are non-lockers.

 

[The Darkside]

After talking w/ Dusty yesterday, I'm going to probably go to the 9.5 non-lock up convertor. I understand I'll have to mod the tranny a little to do that, but I guess that's not too hard to do..
I really wish that I would have been advised that this 10 inch wouldn't handle the power my car is making at higher boost levels before it was recommended to me...Hopefully I can now either sell mine to someone whose needs it fits or Dusty said he would let me trade it in for an amount yet to be determined & put it towards a 9.5...
For whatever it's worth my rpm drops were approx 600 rpm w/ this 3200, so I'm wondering if that's a little too loose....should I go with a 3000 or even a 2800 stall?

 

[TURBO 6]

I think I was seeing 17% slip with a PTC 2800 10" L/U @ 126mph

 

[bison]

im guessing he wants to retain Lock Up, 9.5's are non-lockers.

Not worth it with his combo. My 9.5" slips approx 5% on light cruise. I get an 800rpm drop shifting at 5900 at 29psi. Car is making about 670hp at the flwheel. I get about 1000 rpm drop if the boost is under 24psi. Too many guys on here think they are sacrificing a bunch of driveablity switching to a nl converter. If your at the point you could benefit from a nl then you already have modded the car enough to hurt driveabilty way more than a little converter slip. Anyone who thinks their saving $ gas with a lockup is fooling themself if they really want to have the most effective performance out of their converter. Ive seen cars drop .3 and pick up over 5mph with a 9.5" vs a lock up converter that is run unlocked. What other part can you buy for a 10 second car and get that kind of performance gain for under $1000 and it never goes away. Your actually adding in reliability too since the rpms will be staying down in 3rd gear.

 

[bison]

I think I was seeing 17% slip with a PTC 2800 10" L/U @ 126mph

What are/were you seeing after you switched?

 

[bison]

After talking w/ Dusty yesterday, I'm going to probably go to the 9.5 non-lock up convertor. I understand I'll have to mod the tranny a little to do that, but I guess that's not too hard to do..
I really wish that I would have been advised that this 10 inch wouldn't handle the power my car is making at higher boost levels before it was recommended to me...Hopefully I can now either sell mine to someone whose needs it fits or Dusty said he would let me trade it in for an amount yet to be determined & put it towards a 9.5...
For whatever it's worth my rpm drops were approx 600 rpm w/ this 3200, so I'm wondering if that's a little too loose....should I go with a 3000 or even a 2800 stall?

You want it to go to about 3400rpm at zero boost/vacuum on the t-brake ideally. A little less will still work. More will make it spool quicker from a roll. Mine is at about 3100 at zero boost/vacuum. A little tight for a nearly stock compression 231ci but it still spools to 20+psi in under a second on the t-brake.

 

[The Darkside]

On the foot brake I see 3200 rpms @ 0 boost. Car has been & probably always will be 95% street driven & raced....(remote back roads & clear straight highways of course.... )


The Darkside

ps: What's a PTC 9.5 non lockup gonna cost me?

 

[bison]

On the foot brake I see 3200 rpms @ 0 boost. Car has been & probably always will be 95% street driven & raced....(remote back roads & clear straight highways of course.... )


The Darkside

ps: What's a PTC 9.5 non lockup gonna cost me?

Looks like your LU unit is working good down low. you would be at at least 3400 on a t-brake. Check pm.

 

[Dusty Bradford]

On the foot brake I see 3200 rpms @ 0 boost. Car has been & probably always will be 95% street driven & raced....(remote back roads & clear straight highways of course.... )


The Darkside

ps: What's a PTC 9.5 non lockup gonna cost me?

I remember you buying the converter but I can't remember if I recommended the 9.5 or not. If you've always had the 70mm I'm sure I would have suggested the 9.5 over the 10" That's a serious turbo and can easily make more power than these 10" can couple like we want. Tightening really isn't an option for the 10" because you need the rpm to get that 70mm going. Loose down low and tight up top....the 9.5 is one of the few that can achieve this.

 

[TURBO 6]

What are/were you seeing after you switched?

The only full pass I made since I switched, it went 10.60 @ 128. That was letting the car shift 1-2 auto, me shifting 2-3. It shifted at 4800 to second, I shifted to third at 5900. So theres's no real data there cause of the short shift.

Now I can tell you it went from crossing the line in BG at 6100, on the last pass it crossed at 5450. But again that was 1000rpm less in first gear, which I would think should effect my rpm in third.

At 22psi of boost I'm seeing almost 1100 rpm drop, I'm sure I will lose some drop when I turn the boost up some more. The 10" was dropping 450 rpm, you couldn't hardly see it on the graph.

 

[bison]

The only full pass I made since I switched, it went 10.60 @ 128. That was letting the car shift 1-2 auto, me shifting 2-3. It shifted at 4800 to second, I shifted to third at 5900. So theres's no real data there cause of the short shift.

Now I can tell you it went from crossing the line in BG at 6100, on the last pass it crossed at 5450. But again that was 1000rpm less in first gear, which I would think should effect my rpm in third.

At 22psi of boost I'm seeing almost 1100 rpm drop, I'm sure I will lose some drop when I turn the boost up some more. The 10" was dropping 450 rpm, you couldn't hardly see it on the graph.

Plenty of data there. It 3.8% with a 28" tire. Your rpm drop will change a lot with more boost. You probably getting too much drop now. Mine does best when its over 5000 on the ratio change. 4800 is ok but below that its too low for my combo.