Many people say us auto guys loose alot of power from our torque converters. I was wondering if we upgrade for newer one, will we get higher hp ratings?

 

there are no newer ones...

 

And torque converts dont give you HP. They multiply torque.

 

not true. There are two different companies that make them for the maxima.

 

stock replacements or higher stall speed.TQC don't do jack so I really don't care...

 

WTF are you talking about! High stall torque converters help alot, you have to be sure to pick the right stall to get the most out of it!

 

higher stall speed ones. I am glad that you think they don't do jack. A protorque 2800 for the maxima in theory should give 20% more torque off the line and 10% more top end torque, but no one has dynoed one that I know of. A stock ls1 can get .5 seconds at the track and some modded guys have gotten over a full second in the 1/4 mile with just a converter. I know a maxima doesn't have near the torque as a ls1 so it would take a higher stall (4500) to get gains like that, but daily drivability would be lost. Here is a link with dynos that compare converters.
http://www.converter.cc/dyno_shop.htm

 

Your HP will stay the same but you will be quicker out of the hole (dead stop that is).

 

Tell me you are joking around.

 

This would be a good idea for someone trying to buld a fairly quick auto tranny, but still keep some daily driveability. Maybe I should look into this, 96sleeper, do you have any other info on this? I'll email or PM you.

 

he's actually correct. a higher stall TC doesn't "make" more power for you. it gives your the chance to be deeper in the RPM when you take off. it's not like a SC or nitrous that gives u more power. it's just a way for you to harness the power at the right time.

 

higher stall TC will kill your MPG. you'll lose some of that off the line pull from a stop light...but if you're going all out race you can power brake at a higher RPM before the car starts to pull. if you have a shift kit (harder shift) your shifts won't be as hard. your ATF will heat up ubber fast if you drive it hard.

 

hmmm looks like some seriious downside to this, i think this mod would maybe get jime into the 11's?

 

I don't have much to add technically to this discussion. I will say that I have been in a handful of cars that have had mild torque converters and no streetability problem.

I also came across this thread in a G35 forum recently.

http://g35driver.com/forums/showflat...sed&sb=5&part=

 

I think it depends on what stall speed you chose. Also, a tranny cooler and vb mod will help out. I'm getting ready to do a tranny and engine overhaul, but think that the 5spd conv. will take too much down time when ic an get a tranny from car-part and send it to level 10 or some other reputable shop and then have them send the finished product to me, just food for thought for now.

 

woah...i never said it wasn't streetable...but if you put a slightly higher stall TC that's what you'll end up with. your car will still perform on the street.

 

A 2800rpm stall would kill our tranny in a month. The stock auto has a 2200rpm stall speed, meaning the car doesn't start to move til 2200rpm when torque braking for those that don't know. TQCs don't give you any power all they do is let you rev to a higher speed at which you can launch...

 

Thats not entirely true. Aftermarket torque converters can have a more efficient fin design than the stock one which will not only decrease the drivetrain loss (resulting in more hp to the ground), but also allow the engine to rev up faster. If you click the link I posted above and look at some of the dynos, the cars made more hp and torque than with the stock converter. There are several members that have the protorque 2800 stall and say there is no decrease in drivability and most people could not even tell it was there during regular driving. Only when you flash stall it (brake torque from a dead stop) can you notice a difference.
I try to research my information and back it up with facts, I don't just make wild claims with no support.

 

The ignorance in this thread is making my head hurt.

 

I've had the ProTorque TC (2800rpm stall speed), VB mod, and a tranny fluid cooler in my car (120k miles on the tranny) for years now and I've had no drivability problems at all. When I first got the TC years ago, I did a G-Tech run...0-60mph...0.5 sec quicker than ever before. Mind you, it is a G-Tech verified number, so take it as you will.

 

True on all accounts. An efficent torque converter can gain you both HP and TQ assuming the converter is of good quality. I'd imagine the Pro Torque's are just revised OEM converters with bent fins to increase stall speed because the converters are relatively cheap ($400). A quality converter will cost you $800-900. I will probably get an auto for my next car and I'll add a torque converter as one of my first mods. I know there are guys running torque converters in their 3.5 Altimas and they're getting great results.


Dave

 

1) Na, a 2800rpm stall would be completely fine.

2) It's possible the car will move under 2200rpms when torque braking.

3) Torque converters can give you more HP and TQ.

4) Torque converters do rev to a higher launch speed, but going from a 2200rpm stall to a 2800rpm stall can net you about a 20% gain in launch torque. On drag radials or slicks, an auto 4th gen would probably put the hurt on the a 5 speed 4th gen on drags/slicks.


Dave

 

That is correct I had a protorque TC also and it was much easier to leave from a stop faster. Since maximas are V6's they need more gear multiplication, so given the redline and torque a 4.0-4.3 final gear would produce the best results.

 

There are other things to look at Cam size, Weight of the car,ect....for looking into stall speed...Converter companys are taking stock converter and Bending the fins, shaving the Stator, putting more Bearing into the converter making them less efficent

http://www.mitsubishigraveyard.com/direct.html