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8K views 23 replies 9 participants last post by  Cam8888 
#1 ·
went back to the track today with a new 4200 YANK CONVERTER, let me tell you it puts my old 3800 vigilante to shame. Dave the owner of yank built a new type of converter, and recommended i try it and guaranteed i would go faster, he kept his word and there is a lot more left into it, this was the first test day at the track, and i had a problem with my front brakes working so i couldn't ft brake it higher then 2500 rpm but results don't lie, this is the most streetable converter i have ever driven, it actually drives better then stock, it locs according to throttle position and at what you set in the tune, it is giving me faster 60 fts and better gas mpg at a lower mph, here are some of the very consistent slips from today, could my
60 fts possibly reach 1.30 when i can ft brake to 4000:surprised
dennis50nj said:
 
#6 ·
this is the most streetable converter i have ever driven, it actually drives better then stock, it locs according to throttle position and at what you set in the tune
Great runninig Dennis! That some very good improvement going from that 3600 PI to the Yank.

Sounds like the converter I need! Are you locking the converter in each gear at light to heavy throttle to make it more streetable with no lock at WOT? Is the converter going to live very long locking so much? Maybe a screen shot of your Apply/Release Speed table?
 
#7 ·
thanks Larry the converter is great, and it wasn't to its full potential as my front brakes rotors were cold and rears hot don't no what was going on there, the converter locs at part throttle but unlocks at a little more throttle, it locs normal depending on throttle position, doesn't need to be wide open to un loc, if i was you get it
 
#8 ·
Just trying to determine how such a loose converter can be made streetable. Seems to me first gear would be a problem. With normal acceleration when the car starts to move the rpm spins up fairly high but when the converter locks at this high rpm then a fairly violent drop in rpm. Or if no lock up in first gear then second gear would get the hard lock. With a factory converter the rpm is much lower so when it locks you don't get the voilent lock. Maybe I'm missing something?

I understand unlocking with more throttle which is good.

Seems to me quite a lot of wear to a small aftermarket converter. I have my Yank 3200 so it never locks in 1st-5th gears and then only in 6th with 12% throttle. But I have a much tighter converter so streetability is great. Just not much et gain!
 
#17 ·
its hard to say, i didnt get a clean pass as my front brakes werent holding while ft braking the converter, so i used he ebrake and if i went over 2500 rpm it would still push threw the beams and stage deeper, i need to really foot brake it to 3600 rpm if i can to get a better time, also the da was - 800s 10.201 , last time i ran with the old converter da was - 1300s 10.38 with same battery so about 1.8 + .08 = 2.6:D and hopefully more with the higher ft brake not bad going from a vig to a yank:thumbsup:
 
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