Mr. Sir

Compare and contrast. I've heard that the sy3500 is looser, but how much difference is there under:
light
medium
and heavy load.
A few hundred rpm? I like the manners of the ss3600, but the performance of the sy3500.
Anyone who's had either, do tell what it was like.

Mazzenger

iTrader: (5)

I have owned SY3500. I had no problems with it. It is kinda a soft hit. It didn't hit very hard but your car would boil the tires. Also it is very efficient. I know on the dyno you would only loose 5-6 rwhp from locked to an unlocked converter. I always thought it was a little loose. I want to say my car still dropped .5 second et with the addition of it.

But I don't think you can get them anymore.
I don't know anything about the ss3600, but many members on here have them and seem to like them quite a bit.

Mr. Sir

Yeah, the sy3500 isn't in production anymore, but it's still my converter of choice. Probably.

Mr. Sir

This one doesn't even require critical thinking. It's just an opinions thread. Where's the opinions?

Mr. Sir

bump.

RPM WS6

iTrader: (3)

You won't find many people to talk about the SY3500 any more, those have been gone for many years and weren't popular with the drag racing crowd even when they were still being sold. The low STR of the SY series (1.6 for the 3500 and 1.8 for the 4000 I think) was great for street tires, and their efficiency was super high, but in a situation where traction was plentiful (like ET Streets and a drag strip), you'd be leaving some decent 60-foot still on the table vs. other similar stall speeds of the day (like a Vig 3200 or a Yank ST3500). I had an SY3500 for several years and really loved it for my (mostly) street car. It was pretty easy to get a great launch on Z-rated street tires, and with a 17" BFG DR I could get 100% traction at the track. My best 60-foot was a 1.69 with stock internals and a 3.23 gear, and I believe that was about all this converter had in it at my power and gearing level. I don't think I've ever heard of a stock weight, stock internal, stock gear car ever doing better than a high 1.6 or low 1.7 60-foot with the SY3500.

So again, if your main goal was best possibile ET for a track car, this was not the best choice of converter (though trap speeds would be great with it's high efficiency). But for a street car that spent most of it's time on Z-rated tires, this converter was an excellent option for a strong street launch without destroying the tires, great efficiency for higher speed roll-racing situations, and all the benefits of increased shift extension that come with any 3500 stall TC.

One other downside of the SY series is that they were considerably more expensive than the other non-power adder models that Yank sold at the time. When I bought mine back in 2000, Mike (Yank owner) told me that the special stator used in the SY series is what made them more expensive.

I wish Yank still made these, it (or the 4000 version, depending on the cam selection) would be at the top of my list for any street car application.

Mr. Sir

Yeah, it's a mainly street car/dd, which is why I want the low throttle benefits of the ss3600 and the efficiency/1.63 str of the sy3500. And I somehow figured the stator was the tricky part of that converter.

RPM WS6

iTrader: (3)

Several years ago I exchanged some messages with Mike @ Yank about the possibility of building me another SY converter, and/or reintroducing the line as a regular or special order item. I think he said that he had one or two of the special stators left around his shop in case he ever wanted to make them again, but I don't think the general interest was there for him to consider reintroduction. I guess that might change if enough people requested it, but I'm probably one of only a handful of people that would be interested. Most people want maximum ET from their application, favoring converters that will deliver this, and aren't willing to leave ET on the table in favor of a little more efficiency and easier street tire launches.

redbird555

iTrader: (14)

I've read a lot about the different converters that yank offers and I just wanted to clarify something lol the sy3500 is supposed to be insanely efficient so wouldnt it make up for not hitting as hard off the line by having good power up top??

And also is the sy3500 tighter on the street than say an ss 3600?

Mr. Sir

Yes, efficiency is high; however, overall ET still suffers, due to its lower str.
No, it's looser than the ss3600.

RPM WS6

iTrader: (3)

Agreed.

Expect slower ETs but higher trap speeds from an SY series converter vs. the same stall speed in an SS, ST or any other series with a higher STR.

SY will feel a bit looser than the SS at the same stall speed.

Mr. Sir

bump, need comparisons.

ejbta

You are over thinking this buy a ss3600 or I prefer a ss4000