didn't really want to hijack the flp ss3800 thread anymore than we did all ready.

i got some dyno charts on this converter vs the truck thruster3000 that i had before. the one is labeled 3600 but i am 99% sure that is mislabeled. what i keep hearing is how this py3400e will really kick *** on nitrous but i dont know what they mean by that. how will it kick *** over a converter not rated for nitrous? will it give me more ET somehow? just looking at the NA charts for the truck thruster3000 vs the py3400 it looks to me like the py3400 is quite abit beter converter all the way around and with the higher STR patrick G says it is even easier to drive(less loose feeling) than the truck thruster3000.

here are the charts.

 

I've got a PY3400E if your interested. It's to loose for my tastes in a truck. I ran a 3600E in my C5 and loved it. But the extra weight of the truck adds to the loose feeling of the converter.

The PYE line as I understand it are more efficent and will provide more TQ & HP to the wheels than their NON-Extreme line. The lock up clutches are better in the Extreme line too.

If you've got a power adder I think you'll be quicker with the extreme vs the Truck Thruster

I've got a PY3400E I sell you if your interested. About 2000 miles on it.

 

I am interested sent you a pm

 

Hrm, you bring up some good questions and while I am not a tranny master by any means I know a decent amount about them, how they work, what they need to last, and a decent base about converters.

From what I under a higher stall converter in a large diameter becomes less and less efficient with higher stall. That's why smaller diameter ones come into play. I think efficiency has to do how well it performs after reaching the stall speed. But when you get into smaller diameters, you have less rotating mass hence the "loose" feeling.

Now I think to help the loose feeling the STR needs to be higher on a small diameter converter. What I don't understand is how a higher STR effects (or is it affects?) the topend efficiency. I mean do you lose like 10rwhp maybe? If so then I'd prefer a more driveable converter than a one that gains a tad more power up top.

The PYE3400 that you have should perform well for what you have planned. Hell it may even be too much of a stall if you do a 408 with a T77 turbo and some nitrous. It could flash stall too high. I dunno for sure. If you want to WOT shift at 6000rpms for example that setup is going to make lots of flash input torque and could end up with 4800rpms stalls depending on how much is sprayed at once. Plus the weight of the vehicle plays into stall...I wish I knew how but at this point I can't explain that.

From what I remember nitrous converters are usually stalled a bit lower as the nitrous makes it stall a tad higher. So on the motor only you may get to a flash of 3200rpms but on the bottle it may get to 3800rpms. Perhaps that's how it will be better on nitrous?

Hope my ramblings make some sense.

 

I am guessing that the ProYank wouldn't be good for any towing? Too high of a stall? I don't tow much but if I do I don't want to hurt it.

 

No not too high of stall I don't think. The lockup clutch is pretty small in a 10" case, you could get a multiclutch converter ($300 more I'd say) and have the towing capacity you want...and the ability to have lockup under WOT in 3rd for a few more MPH from what I understand as the locked-up converter translates into less power loss. Kinda like a manual tranny.

Basically you wouldn't be able to tow in OD as the converter would slip.