What are the differences between the Super Stock and Pro Stock converters?

By the way my SS 3600 rules. I actually look foward to toll boths so I can spank everyone out of the gate.

 

Thanks for your interest in the new Pro Stock converters.

Here are some details about them. They will be put into our website very soon. All specs apply to a stock displacement LS1 with heads/cam and bolt-ons (for which they were designed for). On a bone stock LS1, the stall speed and shift extension would drop a little (but why would you put a race converter in a stock LS1 anyway?).

Pro Stock 4200: 4200 stall, 2.57 STR, 95.5% efficiency, 5000-5100 shift extension

Pro Stock 4400: 4400 stall, 2.59 STR, 95.5% efficiency, 5100-5200 shift extension

These converters differ from previous Yank converters in many ways:
1. Larger, heavy duty, oversized 21 blade stator from a 258mm application is cut-down to fit the 245mm pump/turbine combination. This new stator is a Yank exclusive. The increased stator size raises STR without lowering coupling efficiency. As a matter of fact, the large stator breathes nearly as well as our Pro Thruster stators, but with a harder hit off the line. This stator will ONLY be used in the Pro Stock converters and differs from the 245mm 21 blade stator used in the Super Stock 3600-4000 converters.

2. The clutch is a breakthrough in holding capacity, size and durability. The extra-large 265mm size has 20% more surface area than the competition's clutches (on 245mm race converters) and is comprised of a new composite material with a new anti-chatter matrix. Yank has spent years refining its clutches and the new PS clutch will be used on all Pro Thruster 4000-4600 race converters as well.

3. The billet cover is even lighter than before. First introduced in the SS 3600-4000 line, the Yank billet cover has been lightened even further making the 27.5lb weight the lightest lock-up race converter on the market. This will greatly enhance your 60' times and mid-track acceleration. The new billet cover now comes standard on all Yank Super Stock, Pro Stock, and Pro Thruster converters.

4. Price: Although the Pro Stock 4200,4400 converters cost about 18% more to build than the Super Stock 3600-4000 converters, Yank will honor the $895 price of the SS converters for the new Pro Stocks. Pricing for the Pro Thruster 4000-4600 converters will remain at $950 even though they now receive the new lighter billet covers and oversized clutches.

As Yank continues to break new ground, also be on the look-out for a new line of Truck/SUV converters for individuals who want to race, but still tow a boat or trailer. Yank will launch a new line of dual-clutch disc 258mm converters for Trucks and SUVs in the 2800-3600 range. They will be called the Tow Thrusters. The dual 265mm clutches will increase towing capacity to over 8000 lbs. Now you can have your cake and eat it too. Turbo and nitrous applications may follow as well (if demand is there).

Mike at Yank

 

Damn, these look sweet! Mike, what would you expect the difference to be between a PS4400 and a PT4400 on the same car? Would the PS get a better ET and the PT a better MPH? Or is the PT still kind in both areas?

 

Will the PS be offered in a 3800 stall speed? Im looking for a converter that will work awesome on and off the track. The car isnt my daily anymore, but most of its use is on the street. I definately dont want a converter thats going to make me not want to drive the car. I want one thats going to be enjoyable on the street and even more so on the track. Im looking for a converter that has high efficiency and high shift extensions because my car will not see the bottle. I want the STR to be between 2.5 and 2.7. I will be running ET Streets at the track mounted on some Bogarts and my stock wheels on street tires for the street. I dont really care for any light to light racing, so those converters are out of the question. The car's rev limiter is set at 6700 and will have the shift points set at 6400/6500, so I dont want too big of a drop on the shift extension so that I can keep my rpms in my power band/range. Would the PS series be for me, or do you have another converter that will suit my wants/needs better? By the way, I will be running a 200-4R with 3.42 in the rear. Thanks

 

The Yank Pro Stock converters are only available in the 4200, 4400 range. If you want a 3800 stall, the Yank Super Stock converter has the majority of the attributes of the Pro Stock converters, but in the 3600-4000 range. Personally, I would not go lower than a SS 4000 if I were in your shoes. An SS 3800 is still pretty tame on the street (because of its very high STR). Your toughest decision will be deciding between a Yank Pro Thruster 4200 and a Yank Pro Stock 4200. The edge in streetability goes to the Pro Stock, but the Pro Thruster is still the king of the strip (but it's loooooooose).

 

I would be willing to deal with looseness to be the "king of the strip" Looks like the YPT4200 or 4400 would be the best for me. I would still give great 60' without sacrificing good ET and MPH. Just my .02

BTW, what are the shift extensions supposed to be on a PT4200 and 4400? From Yanks site http://www.converter.cc/yank_vs_competition.htm it looks like the efficiency is still the same as the PS converters.

 

Lynda, if your TCS 4200 is half as loose as a freinds TCS 4000 (his was a earlier model), you'll have no problems with the looseness of a TP-4200 or even 4400.

Although, looks like the PS-4200/4400 will be a little better of a street converter, mainly do to more clamping area on the lock up clutch and the little better STR.

 

Patrick G: You have me a little confused...you said that you recommend me getting an SS4000 and that you wouldnt go any lower. Then you said that my hardest decision would be deciding between a Pro Thruster and a Pro Stock in a 4200. Not sure Im following. I wanted a 3800, but youre recommending a 4000, but then you said its going to be hard to decide between a PT 4200 and a PS 4200. Im looking for a converter thats going to have high efficiency, high shift extensions, between 2.5 and 2.7 STR, not to be too loose for the street, works well at the track but doesnt have to be dominant, but will also be nice to drive on the street. Why wouldnt you go any lower than a SS 4000? Can you explain this quote: "An SS 3800 is still pretty tame on the street (because of its very high STR)." Thanks for your help.

 

Explanation is simple. For your mods, a Yank SS 3800 is not big enough IMO. A 4000 stall is the minimum you should consider. Based on your mods and desire to kill at the track and have good streetability, my top recommendation is the Yank Pro Stock 4200. If all you wanted was maximum strip performance, then I would go even higher and recommend the YPT 4400, but since you used the all-important "driveability" term, I'd have to recommend the Pro Stock 4200 as my first choice and the Super Stock 4000 as my second choice. Third choice would be the SS 3800. You'll want more shift extension than 4900-5000 of the SS 3800. The PS 4200 will be closer to 5100+.

 

From the get-go, I wanted to go with a 3500 since it sounded about in the middle. But as time when on and I seen many people stepping up, I figured that I should go a little higher so that I wont be tempted to go for more. It seems that all the 3200 users are going to 3500/3600 and all the 3500/3600 are going to the 3800, I just figured that 3800 would be my cut off point. I am concerned about doing well at the track, but the car doesnt have to be a track queen or anything. To me a 3800 was pushing it, but then again, Ive never owned an auto. nor driven one. I also see that for street/strip use that a 3500/3600 is highly recommended. So then I would think a tad more would probably suit me just right. I have no idea how much any of this is going to affect my gas mileage, but as of right now in my 6 speed Im averaging 15-16 in the city if I remember correctly. I know that I dont want my gas mileage going any lower than 14 in the city. I also dont want it to be too loose for the street, because I figure the looser it is, the more gas its going to need, which results in bad gas mileage. I want a converter that is going to do well at the track, but doesnt have to be the best or an all out converter specifically made for the track. I want to be able to drive it on the street without killing the gas mileage and for it be fun to drive. I want high shift extensions so that the rpms dont fall too much out of my power range, I want high efficiency so that I get good MPHs, and good STR (2.5-2.7) for a good hit when I do decide to lay into it or take her to the track. I didnt know that I was going to have to go to such a high stall speed to get that high of a shift extension. I was so brainwashed that I was going to get one built from TCS in a 3800 with shift extensions between 5500-5700 with 98% efficiency. But I guess all that was very inaccurate and not possible. I just dont want to overdo this and get a converter thats too much for the street. When you said with my mods a 3800 is not big enough...Im not trying to make the car an all out race car, is that why you said that? If not, could you explain. Then you say that the 4000 would be the minimum, that I desired to kill at the track, etc....I never really said that I wanted to kill at the track, but to do well. I also noticed as you list your preference, the stall speed gets smaller. (PS4200, SS400, SS3800) I dont know...I thought I knew, but as you start giving me your opinion, I start to not know. I know for sure about the STR, shift extensions, and efficiency, but not about the stall speed anymore. I just thought anything above a 3800 is going to be too much for me. Anyhow, let me know what you think. Thanks

 

Sounds like to me you need the Pro Stock 4200. It should give you 5100+ shift extention to keep you in the power band,should give you excellent 60fts,not very loose IMO and a very effeciant converter. If you don't like it im sure mike will work a deal on a SS 4000.

By the way the Pro Stock 4400 is in the Z guys So far it is WAY more streetable than my TCS 4400 (tighter and better midrange pulling). My shift extentions are a little lower than i would like at 5300 rpms but im sure it will work . I'll head to the track friday night and see how it does,only thing im worried about is losing some ET with the 26x10 ET Drags since i had to go back to 3.73s.