Super Yank converters had a low STR that allowed a street tire to stay hooked up and produce some great street racing action.
They also allowed killer reaction times at the track because you could brake stall them the the rated stall speed, SY3500 would brake stall 3500 RPM

With this the SY3500 and SY4000 worked great for turbo set ups as to the fact you could bring the RPM up quick and build boost.

But we have new designs the will work with the new tire componds on the street the SY3500 is still my choice for a limited tire hot rod.

Parts are very hard to come by so it was dropped.

 

Yank,

Thanks for the quick reply and for the info, makes me like my SY4000 even more! Sometimes I am wishing I had more stall, but I can't deny the way the 4000 performs.

Casey

 

ive always wondered for a roll if its better to have a smallish stall or a bigger stall?

 

In this scenario, bigger IS better...

 

If anybody had vids, but i would like to see big stall vs. small stall from a roll.

 

Video is not required but would be nice to see.

Think about it, a higher stall will be higher in the rpm range and most likely powerband. Of course a lot of factors are involved such as gearing, cam, etc., wherever the car makes power is where you to be.

 

If you look at the M6 and A6 Graph (post #19) in 3rd. gear from a roll you can see the advantage of the auto with a stall and yes the more stall the better the gain!

 

definitely i would take the bigger stall. but im wondering about the smaller stall guys like the 3200-3600 pulling on the 4k stall guys..LOL..

 

This is something that iv been thinking about in the decision of the stall I want. You say that the bigger stall will be better from a roll than a smaller stall. But,whats the deal about the lost efficiency up top in the bigger stall? Sure the bigger stall would pull out quicker but wouldnt the higher efficeincy of the smaller stall be better in higher mph situations?

Yank,seriously...some of the stuff that is said about efficiency lost with aftermarket stalls and other stuff on this board is enough to make my head pop
Iv even had one guy tell me my car would slower from a roll with a higher stall vs the stock tc due to the lost efficiency.

Im looking for a stall that will give me the best...or...closest to the best of both worlds of off the line snap and high end (mph) efficiency.

 

First I have heard of this... Interesting to see what Yank says.

 

Well i have a 3200 stall and love how it drives and it hits pretty hard. But, i have also thought about stepping up to a 4k stall. But at the same time i cant see myself hooking up with a 4k stall at all..LOL.

But ive also read on old threads the same thing senicalj4579 said about bigger stalls not being effiecient up top?

Not sure if you guys noticed the cars on GMHTP mags, alot of those guys who drag their cars are usually running 3200-3600 stalls? ive hardly ever seen guys running 4k stalls? Heck there was a guy with a 408/427 running a small 2800 stall..

thats why i would like to hear from smaller stall guys pulling on bigger stalls?

 

Well for me my power goes out to 6800-7200rpms. So the closer I can get there and have better shift extensions the better for me. I love my 4000 and would not go any lower unless my setup dictated it.

Nitrous is another animal entirely.

 

that too Turbo! I plan on maybe spraying. So thats why i been thinking of just keeping my 3200.

 

I would talk with Yank or whoever built your converter then.

 

Iv been doing some research for a while on this actualy. Not sure how much up top will be lost with bigger stall. Heres a thread I started not to long ago that maybe helpful. The guy in the 2nd post is the one who said my car would be slower from a roll....https://ls1tech.com/forums/street-ra...ime-stall.html

 

This is a link to one of our customers build on his dyno showing FTI converter efficiency.

https://ls1tech.com/forums/dynamomet...4-h-c-ls1.html

Greg

 

Bang, right there. That is why a higher stall converter is deadly from a roll. Yes, you lose efficiency on the top end, but for someone to say that his or her car would be faster from a roll with a stock converter is likely up in the night. Unless the high stall converter is trashed and slipping to all hell. If you've ever driven or been in a car that has hellacious power above say 4500 RPM's, and isn't properly equipped with a matching converter, you know how frustrating it is when you stand on the gas and have to wait for the powerband while the guy beside you is driving away. Then as it hits the powerband you start to reel him in... transmission shifts and the low shift extensions have you playing catch up again. To hell with that. I love my 4000 stall converter. Stand on it, flashes to 4400 and off we go. Shift extensions in the upper 5000 range... oh yes. That is why the guy in the same exact car as me with a stock stall converter is going to get torched.

I'm still hoping Dave will chime in with a little more info, but that's how I feel about the higher stalls. Best mod ever!

 

How do you do from a roll against m6s? Im talkin like 65mph+

 

I used to jump a m6 at 30-40mph w/ 100 shot and full bolt ons, I had a small cam, bolt ons and stall. He would have to catch up to me before he could pass me at 70ish. I know he had quite a bit more power than me as well.

As for 65+. Couldn't tell you.

 

With a quality high stall, dead spots no longer exist. I say this with some emphasis, AS LONG AS YOU HAVE THE TRANSMISSION & CONVERTER TUNED RIGHT, it won't matter what mile per hour you're at when you give it hell. If properly tuned, it will downshift to the correct gear, and flash to your given stall speed and put your *** in the seat. I don't care what speed I'm going from a roll... I feel that my converter matches my setup perfectly, and if his car is faster than mine, he's going to have to prove it by either driving his *** off (manual trans car) or having an equally deadly motor/auto combination. From 65+ against an M6 car, no sweat. Like I said, dead spots are erased. Prior to the stall and gear change, when I had 3.23's, I could downshift to 2nd as long as I was at or below 70 miles per hour. It would be up in the RPMs and take off like a bat out of hell. With the stock stall though, the moment I shifted, I'd lose all that momentum because the shift extensions were, to say the least, dick! So I'd have to wait for it to hit that powerband again and by that time, against an equally fast car, or a car that may have been a little underpowered but had a better combination... I'd get dumped. Not anymore. That's the beauty of a good combination. Big cam, baby cam, I don't give a **** cam, if you have a good quality, well built high stall converter... hold the **** on because the powerband never dies. And you can use that as sig material, lol. Sorry. I know I get carried away with my responses, but I tend to like to back up my responses with examples. Hope that helps.