TC question?????

[sy112]

While I was sitting here pondering future mods to the Sy I came up with a theory. See what you guys think about this, I tried to search and couldn't really find anything along these lines.

Now I know that upping the stall on the converter basically just helps you build boost and get better 60' times. As I understand it, the stock converter is somewheres in the neighborhood of 1600-1800. Correct me if I'm wrong. My goals with my truck are to have a mid 12 sec street truck, with maybe getting high 11's with track prep. I also have the stock tranny, which I understand that it is a hit and a miss whether or not they will last. I was thinking that since I plan on getting the truck to the track and trying to race rather regularly, I should upgrade my stall a little. I plan on going to maybe a PTE 44, 51, 52, someday.

I am planning on getting a trans cooler asap for the Sy, and i figured that coupled with about a 2200-2400 stall converter would really go far as to helping me keep my tranny for a while. I have read that it is heat build-up that bascially kills our trannys. So I figure if i get a higher stall then i wouldn't build up as much heat when launching and with the cooler it would be much nicer to my tranny :lol:

I guess my real question is, would it make sense to go with something like a 2200-2400 stall on stock turbo. It would help protect against heat as well as help me build boost(I have Zr1's with 11's) so I figure I could get away with building a lot of boost off the line and get some killer 60' times. I am concerned about the drivability of the higher stall with stock setup though. But like I said I am planning on upgrading turbos in the future but nothing to huge. So i know a higher stall will hep in the long run with larger turbo. Basically I am wondering if going higher stall WILL help protect my tranny and WOULD it hurt my drivability?

Thanks for any input or advice!

 

[MattGE]

Re: TC question?????

I guess my real question is, would it make sense to go with something like a 2200-2400 stall on stock turbo.

I plan on installing my 2800 stall 9/11 soon and I have a stock turbo(for now) so I'm kinda in the same dilema. What do those PTE kits go for these days?

 

[Captain Morgan]

I believe stock stall IS either 2100 or 2400, i forget which....

 

[sy112]

Looks like they are about 1500-1600 or so. See to me 2800 seems like a bit much. I have drove a NA car with 2800 stall and it felt way loose to me. I think it might be different in turbos though. I hope on maybe getting a couple rides from guys with higher stalls at the Nats so I can get a feel for higher stall on turbo trucks.

Really not sure whether I want to go 9/11 or not either, haven't really read anything about people with the new ones. Seems like the Hughes I believe are doing real good though.

 

[sy112]

Oh I thought it was below 2000.

 

[speedy]

Correct me if I'm wrong but I think that a higher stall increases the amount of heat that is produced.

 

[sy112]

I just figured with the lower stall when you are trying to build boost then you are really wrenching on the tranny, but with higher stall you are not working on the tranny so hard so there is less heat build-up. I might be wrong cause at higher stall isn't there more slipping and that could generate more heat :-? I am a little lost really, that's why i'm posting this.

 

[Captain Morgan]

Correct me if I'm wrong but I think that a higher stall increases the amount of heat that is produced.

higher stall converters do create more heat, as do smaller converters. a 10" converter will create more heat than a 12" converter, even with the same stall. at least thats how its been explained to me.

either way, with the proper external cooler and a good working trans, the heat issue should not be something to be scared of. getting a tranny temp gauge is also highly recommended, you just dont realize how fast your trans can heat up sometimes, ive learned alot just by watching the litle gauge

 

[Sy769]

The higher stall generates a LOT of heat at the line. Looser converter=more slippage=more heat. I do feel a looser converter doesn't strain the tranny hard parts as much because you can build boost faster. A 15lb. launch in my truck is the result of sitting at the line for a couple seconds at full throttle with the brakes locked. If I had a little higher stall speed I could get to 15lb.s much faster hence less time spent with everything in a strain.

Did I mention 15lb launches are funner, er gooder, er break shit

 

[sy112]

On my pillar pod, one of the gauges is for oil temp( don't ask me, bought it that way) I do plan on switching it to tranny temp though. I want to do as much as I can to save my tranny but still drive it like these trucks were meant to. Don't really want to come up with the money for new tranny in the near future.

 

[sy112]

Yeah Patrick, that is what I have been trying to say!!!! :lol: Looks like it would be easier to have a shorter time revving than all that time holding the break.

 

[Sy769]

Good gauge to have. That way you know the limit of how long you can hold it at the line without hurtin it.

 

[AXXE]

I think the stock stall speed is 2200 - 2400. You should be able to run close to mid 12s with what you have on there now.

 

[smeagol]

The stock converter will stall up to 2400 I believe. I think I've seen some leave the line higher than that. We'll start getting into semantics about flash speed etc past this.

Anyways, if you are doing bang for the buck with a stock turbo... doing a stall converter ain't where it's at IMO. All you'll find with that is wheelspin. Once you open the exhaust up on a stock setup, you'll find you can spool the turbo like *mad*.

I'd rather see the money spent on an exhaust dump & an external wastegate. Solid boost control, excellent spool up, great hp gain.

I'd look into a stall converter once you have a goal of going faster, or going with a slightly larger turbo, or are going through the tranny.