Does anyone know what the STR is on their 12" 2600 stall convertor?
Thanks

Bob

 

Can't answer that question, but VetteWrench has a GP going on Yank convertors. Very high quality. Check this page for topic. http://forums.corvetteforum.com/zerothread?id=230776


[Modified by art91, 12:22 AM 2/2/2002]

 

Great convertor for street uses but if your going to race at the track alot there are better choices in 9.5" convertors to use.

 

John, last year I had bought and put in a Vig 2800. I also did a trans cooler at this time as well. I did pull some great 60 ft times but my et did not come down at all.
On the stock convertor with Nitto's I had previously been pulling high 1.9x to low 2.0x's. I consistently ran in the 13.9x to 14.1x at anywhere between 96 and 101 mph (a wide range which I think is strange).
With the Vig when I actually hooked up I could usually get in the low 1.8x's. I even pulled a 1.79 which to me felt awesome, however my mph was suffering, in the 92 to 95 mph range and my et was also poor (especially when I didn't hook).
I think this was too much convertor for a basically stock L98 but I had plans of cam and heads in the near future. Well those plans are on hold for a while now so I decided to take out the Vig and go back to stock for now.
Just for the record I think they are good convertors but next time I believe I will want something with a lower stall along with a lower STR for better effciency on the top end. Please correct me if my thinking is out of line.
BTW I usually hit the track about 5 or 6 times a year so while I do want as much as I can at the track I do need to be able to get moving on the street too.
Any thoughts you have for me are welcome.

Bob

 

You may be right on this one.
Where is Ralph or Beach Bum?????????

 

As already said, if you're planning on drag racing a lot, there are better choices such as PI and Pro-Torque, but in my opinion there is absolutely nothing wrong with a SLP 12" converter, or at least there shouldn't be... keep in mind that converter is very, very similar to the stock 85 converter which flashed up considerably higher than later year C4's and was rock solid from a reliability point of view..... with a 85 converter I ran a best 1.70 60 ft in a motor that barely made 300 hp... which isn't bad.

Not sure what happened to Irocan, but if you lost mph, something was wrong with the converter.... you shouldn't really pick up any substantial mph either.... but definitely not lose any. If your 60's were great, but your traps were horrible, something went wrong with it.... sounds like it was stalling to high.... which the excessive slippage in 3rd gear could possibly hurt your trap speeds..... but dunno.

My last comment.... any aftermarket converter is better than a 87 and up stock torque converter, they're all lame ducks.... and you should have an et improvement of a solid 2 tenths and even 3 tenths by going to a SLP 12" converter..... another tenth or two with a Vigalante and a little more stall.

Don't forget to throw some sticky tires in your shopping cart. :)

good luck
Beach

 

I am running a GM 12" convertor that is very similiar to the 85 Vette convertor. My Tranny guy said it was a Grand National convertor.

SLP's 12" convertor is much more expensive than the 12" GM convertor.
Mine cost about $180.

Like Beach Bum said above the 87-91 Vette convertors are very weak.

My 89 convertor stalled at about 1300 rpms.

By swapping convertors I cut 1 tenth off my 60' times.

Vic

 

STR is the amount of torque multiplication at stall. The STR should have NO effect on trap speeds. Possibly there is something wrong with the coverter, allowing slipage long after it's supposed to be locked up. If traction is the problem, I wouldn't tame the converter to match the tires, I would solve the traction problem to take advantage of the converter.

 

As I said before traction was usually a problem but even when I did hook and pull great 60 ft's my et's were not reduced and I lost an average of 5 mph compared to where I was at with the stock one.
I also race about 5 times a year but not in a bracket class, just T&T once in a while.
If you guys think that the 85 vette convertor will do the same thing as the slp for me then that is a possibilty also for a cheaper price. How would this convertor work for me when eventually I do heads and cam?
Again I'm not hacking on the high dollar convertors--they are good but not sure if its worth it for me again.

Bob

 

Something was definitely wrong with your Vigalante.... guess that can happen from time to time.

Based upon your racing habits, I agree I think a mild 2400-2600 12" torque converter will be perfect for your set-up. As one other note, I believe the stock 85 torque converter is rated at approxmiately 2100-2200 rpm stall, whereas the SLP is a little more agressive at 2400-2600 stall.... so they're not exactly identical, but as stated above, the 85 style is a bit cheaper. One last note, I think some of the S10 pick-up trucks use the same converter too.... so maybe an option for you.

good luck
Beach

 

Thanks Beach, I am still wondering though what the STR is on the slp and/or the 85 vette convertor. I'm now trying to decide which one of these to try.
And by the way, the Vig 2800 I had stalled at about 3300. I've heard that this is pretty common for these to do that?

Bob


[Modified by Irocan, 5:27 AM 2/5/2002]

 

Ironcan, if you are seriously considering getting a TC in the next few days, why don't you join in on the Group Purchse from Vettewrench on a Yank converter? We have 5 (as of 4:00 CST today) confirmed, which will get one at a discounted price, but the more people that get in on it, the more you can save. Check out the link:

http://forums.corvetteforum.com/zerothread?id=230776

Just give Brian a call and let him know what you want. :cheers:

 

It looks like Yank is making the SLP converters: http://www.converter.cc/
Look in the converter brands section and go to the GM/F-body section
You'll see the SLP/Yank Stealth 2600 so to answer your question the STR would be 1.90

 

Thanks, unfortunately I won't be in the market for a while. I'm just trying to do some homework again. I will probably want to wait until I do the head and cam swap to get the convertor this time.

Bob