I have the converter out of the car and I was wondering what I should re stall it too. The converter is a Precision single-disk L/U @ 3000 stall. I have just done a ton of upgrades which include the RJC Racing FMIC, 50 lb injectors, chip, THDP 3", Intake, and some other goodies. I am also running the Pt-61 turbo. What should I get the converter re-stalled to, I was told that 3000 should be ok, but its right on the edge for not being enough. Thanks for the help....
RE-STALL Help
- Thread starter graza002
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Im suprised the 3000 is barely adequate. Do you have an exhaust restriction or a rich condition at throttle transition? If not 3200-3300 should be plenty. I could spool that turbo with a 9" 3000 stall easily even with a .85 ex.
blackplague
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You should be good to go as is.
The converter has the ability to grow in stall speed {usually + or - up to 300 rpm} to match your upgrades. For example, in the,"old school" days people would take a 10 vega converter behind a 4 cylinder which stalled aprox 2000 rpm's, now put that same exact converter behind a small block chevy and it would go to 3000 {usually not for long, but that's another story}
I'd run your Vig as is, you'll be fine. :biggrin:
The converter has the ability to grow in stall speed {usually + or - up to 300 rpm} to match your upgrades. For example, in the,"old school" days people would take a 10 vega converter behind a 4 cylinder which stalled aprox 2000 rpm's, now put that same exact converter behind a small block chevy and it would go to 3000 {usually not for long, but that's another story}
I'd run your Vig as is, you'll be fine. :biggrin:
JDSfastGN
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id rather have too much stall than not enough, especially with a lockup unit. 3400 and be done. A slow spooling car is not very fun.
id rather have too much stall than not enough, especially with a lockup unit. 3400 and be done. A slow spooling car is not very fun.
I heard that too much stall could be bad to the combo. I dont think 3400 would be bad. Right now the car spools like a mofo but at high RPM's.
JDSfastGN
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more stall means less efficiency up top sometimes. but with a 3400 i think it should be ok.
What Are You Going To Do With The Car
Andrew,
3000 - 3200 will be great with your setup
You have to decide how you will use the car most of the time
90 % street, 10% strip ?
80% street, 20% strip ?
Looser the stall, the more slippage, the more heat that will be generated
If you plan to drive it on the street most of the time, I would keep it 3200 or below. Even if the convertor is stalled at 3200 it may actually flair higher depending upon the power your setup is making
If you had gone all out with heads, cam, throttle body, etc. then you would be up in my range of 3600 - 3800 non LU
Get the car back together and drive the hell out of it. Enjoy your investment for awhile before you thrash it....lol
And remember, keep the damn boost down
later
Ray
Andrew,
3000 - 3200 will be great with your setup
You have to decide how you will use the car most of the time
90 % street, 10% strip ?
80% street, 20% strip ?
Looser the stall, the more slippage, the more heat that will be generated
If you plan to drive it on the street most of the time, I would keep it 3200 or below. Even if the convertor is stalled at 3200 it may actually flair higher depending upon the power your setup is making
If you had gone all out with heads, cam, throttle body, etc. then you would be up in my range of 3600 - 3800 non LU
Get the car back together and drive the hell out of it. Enjoy your investment for awhile before you thrash it....lol
And remember, keep the damn boost down
later
Ray
Doing this would yield way less than ideal results as you would drive throught the converter and get a $hitty mph. Converter technology is way too good these days to even think about that scenario.
If the converter is built around his gearing and torque then he should still have decent efficiency up top. Smaller diameter converters will stall higher and still have the efficiency up top when built correctly. Thought the higher stall will always increase the trans temp more over a lower stall. Bigger cooler is required then.
JDSfastGN
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I think you can go too big, but thats in the 3800+ range imo. If the converter is a good design it should be perfectly streetable at higher stalls. My dads 86 GN has a 9/11 converter that stalls at 3600 at 1-2 psi and higher at more boost. It is loose feeling but nothing to complain about and it still gets great mileage to boot.
Id still look at your throttle transition fueling to be sure its not too rich or you are sacrificing something you dont need too.
To be honest with you, the car was running a little rich before I blew the Sh*t out of the HG's then the barings went blah blah, you get the pic. The motor is complete and the trans is getting freshened up...The car is going to get a great tune so the fuel is going to get brought back down to the correct level. I have not had the car to the track yet with this set-up. I was just thinking of getting the converter opened up while everything was apart.
Whats that Ray...Turn the boost up?!?! LOL. I plan on taking the car to the track more yet I want to enjoy it on the street too. Once its back together I am just going to throw some drag tires on it and have at it.
blackplague
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That's true.
But it was just a thought to get a point across. I see the new converter technology every day building them. It's cool to see how far we've come with converters.
Mike.
But it was just a thought to get a point across. I see the new converter technology every day building them. It's cool to see how far we've come with converters.
Mike.
Do you have an aftermaket ECU on it?
In that case i would talk to the chip maker and have them try to adjust the transition fueling. If its too rich it will spool slower. Having it get rich really quick is common with the big injectors run these days while trying to control them with the stock ECM and MAFS. Very hard to get a smooth transition once the MAFS maxes out. Usually it hits a really rich spot for a second or so. An open or free flowing exhaust will help this because it will spool even quicker making the rich spot less noticeable.
I have a cat back, i also have the cut-out on the car....so really I dont have a cat :biggrin: The actuall mufflers are flowmasters. I heard they are not too great for the turbo world.
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