3200 or 3500 stall?

[grandnash84]

yo


i got a few questions on a stall. currently i have a turbo 400 with a 2800 stall. i went to the track a couple of weeks ago and ran like crap because of my 2800 stall. i was not able to get a good launch. i am leaning towards a 3500 and upgrading my gears to 373, but i want my car to be streetable. i live in san francisco and i drive my car a lot but not a daily driver. there are a lot of hills, stops lights, signs, etc. how will the car drive on the street? my 2800 is perfect for the street but not the track. will the car be slower on the street? how will it drive? should i go 3200 or 3500? any info is greatly appreciated.

 

[Dusty Bradford]

Gives us your combination and we can be more help. A 3200 could be a huge difference depending on your turbo size.

Also what converter is in it now? Bring it up to 0# of boost while on the brakes and see what the rpm is. You could have 2800 that's only stalling 2400.

 

[grandnash84]

i got a 6776 turbo and when i power break i start to burn out at 2200

 

[Dusty Bradford]

A 2800 would work better. What you have is too tight. The 2800 would still drive like you want but have enough rpm to spool.

 

[grandnash84]

well I'm already running a 2800 stall and I'm burning out at 2200. That's why I made this thread is because the 2800 isn't working out.

 

[JDSfastGN]

well I'm already running a 2800 stall and I'm burning out at 2200. That's why I made this thread is because the 2800 isn't working out.

but a true 2800 would work much better than your "2800" that only stalls at 2200.

 

[Dusty Bradford]

well I'm already running a 2800 stall and I'm burning out at 2200. That's why I made this thread is because the 2800 isn't working out.

You don't have a true 2800. It may be rated at that by the builder but it's not stalling the correct amount with your combo. You either have to send it back to the company and have it loosened or go with another converter.

 

[grandnash84]

hat brand do u guys recommend? I gave a Hughes antiballoon.

 

[Dusty Bradford]

hat brand do u guys recommend? I gave a Hughes antiballoon.

Have you spoken with them about restalling it?

I sell a lot of PTC 2800's for street cars with 6776's. They stall around 2800 at 0# of boost. You can go 3200 but it is pretty loose for a car that shifts under 6000rpm.

 

[John Wilde]

If you need to go with a new converter I will personally vouch for Dusty.
Considering converters are not cheap you may want to see if Hughes can
loosen it up for you. However I guarantee they don't have the experience racing Buicks that Dusty does.

 

[grandnash84]

Have you spoken with them about restalling it?

I sell a lot of PTC 2800's for street cars with 6776's. They stall around 2800 at 0# of boost. You can go 3200 but it is pretty loose for a car that shifts under 6000rpm.

i never thought of calling hughes but ill give it a try. so a 3500 stall wouldnt be good on the street?

 

[onefastgn]

I didn't buy my converter from Dusty, but i can say my PTC 2800 stall L/U converter has been the best choice of any converter for any of my combos in the past. It stall at 2800 like it is designed to. I have talked to dusty a few times and all i can say is he is a great guy to deal with and he will stand behind his work. He even came recommended by Vince Janis who buit my trans.

 

[Dusty Bradford]

i never thought of calling hughes but ill give it a try. so a 3500 stall wouldnt be good on the street?

No, a true 3500 is too much for your combo. The main issue is it will not couple well at your rpm range.

 

[John Wilde]

No, a true 3500 is too much for your combo. The main issue is it will not couple well at your rpm range.

Dusty what are kind of guide lines do use for the stall to coupling rpm ratio?

2800/stall = ?RPM/coupling
3200/stall = ?RPM/coupling

 

[grandnash84]

if i send my converter back to hughes will they test it to make sure it stalls exactly at 2800?

dusty how much for a PTC? and will it be good for the track?

 

[Dusty Bradford]

Dusty what are kind of guide lines do use for the stall to coupling rpm ratio?

2800/stall = ?RPM/coupling
3200/stall = ?RPM/coupling

I wish it was that easy. The turbo size, head runner, cam size all play a part in how the converter acts down low. That's why running more turbo than your et goal requires kills a combo faster than anything. Then the power the engine makes effects the coupling point up top. It's very important to know how hard the car will be pushed when choosing the right set-up. Lots of cars have 10.50 capability but will never be pushed that hard.

 

[Dusty Bradford]

if i send my converter back to hughes will they test it to make sure it stalls exactly at 2800?

dusty how much for a PTC? and will it be good for the track?

There is no way to test a converter for stall speed other than putting it in your car and trying it. All vendors have to go by is combos used in other customer cars. That's why you have to gather the data at 0# of boost and provide that when you need a restall. If they know yours needs to go 2800 but will only stall 2200 in your car. They have to make a decision based on experience what needs changing to get another 600 rpm. It may be a stator change, it may require pump modifications plus a stator change. 600 rpm with their core may not even be possible. It could be 400 or 800 increments.

You also have a PM.