9/11 stall speed data

[norbs]

The 9/11 converter is producing a flat rpm curve , i e there is no rpm drop on the shifts at all at 20 psi boost pus. I would think a stall change of 400 rpm will be enough. Chris should i ship it back to you or tcs directly? The stall change is free correct?

 

[norbs]

ops forgot the data

10 psi=4800 rpm stall
22 psi=5700 rpm stall
28 psi= 6000 rpm stall

 

[NEARING]

What stall speed a 0 boost? What speed is stamped on the converter?

Thanks.

 

[wickedtt]

sounds like its very inefficient.too much slip

 

[norbs]

It is stamped 3800 and its about 3000 -3100 at 0 psi

 

[NEARING]

Originally posted by norbs
It is stamped 3800 and its about 3000 -3100 at 0 psi

Same one I have.

Maybe by this weekend I get to try it out.

Sounds loosey goosey under boost!

How it pull out of the hole?

Thanks.

 

[chris718]

you can ship directly to tcs.make sure to supply combo data so they can make it work with what you have.what happens if you lock it in 2nd gear?

 

[Real-T]

norbs,

Do you lock the converter ?? If so at what speed (or gear) ??

I spoke to Chris today, there are two of us here that are working on the same problem. I installed a 3600 9x11 in my car with a GT67, and another GN installed a 9x11 3800.

Both cars show very little rpm drop at the shifts. After speaking with Chris I put in a lockup switch so I can do it manually. I have an extender chip that allows programming of the lockup speed but wanted to check if it was working or not.

Sure enough, when I lock the TCC in 2nd, the 2-3 shift rpm go from 5400 to 4600 (as shown on Turbolink). not sure what the effect will be at the track and can't really tell (by the seat of the pants" but feel better now that the car shifts within the power band.

BTW, my motor is unopened with stock cam and heads so after 5100, there doesn't seem to be much left in her.......

 

[chris718]

norbs ,i will 100 percent cover you on the convertor but wish you would try locking it up manually in 2nd to verify performance gain.i know there will be one.after that ,if you need a lower stall you can get it shipped from my canadian office.thanks for the information mike.

 

[norbs]

Thanks Chris, i know you take care of your customers, but i already took the converter out today. SO i can't get that 2nd gear data you want. The converter is locked at 90 mph each run automatically by my lock up controller. All i need is about 500 rpm out of the converter @30 psi boost

 

[norbs]

Chris i spoke to Rusty at tcs , he said he will take care of it, and i already shipped it today. But im not sure if he is going to shipp it back or like you said i should buy another one up here?

 

[Razor]

If it helps data, my 3600 will drop 600 RPM's if shifted at 5700 RPM 20 PSI boost. There is nothing under 5k with it unlocked. Locked is a whole other issue.

I can see if the car has a tranny brake, stock heads and cam.. you dont have a 1st gear.

Works great otherwise.

Mike... how ya doin

 

[Real-T]

Razor (Julio),

Not sure if that "how ya doin" was meant for me, but we are doing well up here with your alky kits. Without it I don't think we could race as much as we have and as well as we have.......

Every chance we get we tell other owners about your kit......

I hope the weather down there hasn't hurt you too much.....


Now back to this thread topic, you shift at 5700 ?? I seem to recall that you had heads and a pt54 turbo? Does the car pull hard at that RPM ??

What happens when you lock the converter ? When do you lock it if you do ?

With the extender chip I have, I think that locking the converter at 53mph would help. The car feels like it's pulling hard and the RPMs are well within the power band (about 4500-5200 in 2nd and 3rd)......

 

[norbs]

Razor what is the lowest rpm unlocked at lets say 27 psi boost?

 

[chris718]

the time that exhaust energy,(a product of engine rpm)takes to drive the turbocharger is greatly increased with the larger turbos being used on the turbo buick v6.the turbocharges response to exhaust energy is greatly influenced by torque convertor characteristics.in a perfect world the engine would instantaniously reach the optimim boost level in 1 second or less due to torque convertor slippage when footbraked or t braked ,leave and use the remaining 2300 to 2800 rpms to reach the end of first gear at 90 percent plus hydraulic coupling,shift to second become locked up and have the flywheel and turbine shaft rotate at the same speed and ,shift third and run even harder.this is providing the turbo and engine,and trans and final drive ratio are sychronized.high stall lock up convertors play a part in allowing a vehicle to enter this realmmm to some degree.as we continue to research this one thing is for sure,larger turbos such as the 45a,76,67,etc are showing greater performance gains by leaving at 3500 to 3800 and being locked in 2nd gear and for the remainder of the run.the engine better be making in excess of 500 horsepower or the vehicle weight will kill the motor when lock up initiates.

 

[Razor]

Mike, thanks for the support. It means a lot to me.

I have not been able to get the track time this summer due to the weather situation here. I tell ya its bad when you go to the track and it rains on you twice.. My current combo is PP heads, 210/205(1.7 rockers), TE67 w/69 trim wheel, ME-r, 3600 9x11 billet.

Norbs I havent had the car at 27 PSI yet on this turbo due to weather(4 hurricanes in one month) This coming Sunday i'll be turning up the screws on the car. Previous time out at 21 PSI it ran 11.49 at 118. Last time out at 19 PSI it ran 11.74 at 114. I'm trying to gradually increase the boost and keep the heads in place. This coming Sunday(weather permitting), if the motor responds well at 21-22 PSI, i'll turn the wick up and get better data. I have the DS runs on the 11.49 and 11.74 runs. Thats how I know the RPM drop. I havent been locking the converter and letting it wind out. Actually at bout 95 MPH been locking it up. my RPMs on those runs drops from 5600-5700 shift point to 5000-5100. But i've tried shifting earlier, fugedaboutit. I can only imagine at 26-27 PSI it will be like 5500-5700 the whole way down the track unless it gets locked early.

I agree better be making some power. One thing is this converter on the highway is wicked.. just give it a little on the brakes and slam down the gas pedal.. when the boost starts coming up.. car is gone. From a roll... wooohooo.

last tid bit, I left at 3 psi and cut a 1.585 on ET Streets. 100% bone stock rear suspension.

I'm gonna break something soon

 

[joed]

Razor...the old style ET Streets...or new ET Street radials? 1.585...oh, man.

 

[Razor]

Old style on a set of stock 16 inch TTA wheels. When these wear out.. i'll try the new ones