torque converter debate
Burning Brakes
Joined: May 2006
Posts: 1,110
Likes: 16
From: stuart fl
My mods are in my profile, the more weight you can cut the better.
Pro
Joined: Jun 2000
Posts: 635
Likes: 0
From: McMinnville TN
My best repeatable 60' is 1.47. Can consistently do low 1.5x anytime I can hook. Car has 2.56 gears.
Mods are A&A Supercharger, Yank PAS3400, Headers, Vengeance Racing tune, MT 275/40-17 rears, 17 x 4.5 front skinnies, HP Tuners to work on the trans tune.
Car makes 551 rwhp and 506 rwtq.
My launch 'technique' is a little odd, but by watching my videos of my passes, and by looking at my data logs, here's what it appears I do.
I hold as close to 2000 RPM as possible when staging. Then I apparently 'roll into' the converter a little harder right before I release the brake. My logs say I leave right around 2500.
I would make the change to a 3.42 diff if I thought it would make a big difference in ET. I know it probably would, but I'm pretty happy right now. I don't really want to spend the $$$ for another .1 or so.
Stacey
Mods are A&A Supercharger, Yank PAS3400, Headers, Vengeance Racing tune, MT 275/40-17 rears, 17 x 4.5 front skinnies, HP Tuners to work on the trans tune.
Car makes 551 rwhp and 506 rwtq.
My launch 'technique' is a little odd, but by watching my videos of my passes, and by looking at my data logs, here's what it appears I do.
I hold as close to 2000 RPM as possible when staging. Then I apparently 'roll into' the converter a little harder right before I release the brake. My logs say I leave right around 2500.
I would make the change to a 3.42 diff if I thought it would make a big difference in ET. I know it probably would, but I'm pretty happy right now. I don't really want to spend the $$$ for another .1 or so.
Stacey
Last edited by smaynor; May 13, 2014 at 05:43 PM.
Drifting
Joined: May 2005
Posts: 1,655
Likes: 8
From: Avon Indiana
St. Jude Donor '09
Instructor
Joined: Mar 2010
Posts: 201
Likes: 14
From: Flower Mound Texas
Will swap wheels and auto cross this Friday at the Classic at Texas Motor Speedway.
Road Course is Sunday. Got to love what these cars can do.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Yank 4000 here in my '08 bolton and 1.4x 60' times. Previously had a Yank 3600 and mid-high 1.5's and previous to that had a Yank 3200 with 1.7's. Best ever with the stock converter was 1.85.
I added/changed some of the boltons during that time also, but this gives a fair comparison of stall speeds and launch abilities.
I added/changed some of the boltons during that time also, but this gives a fair comparison of stall speeds and launch abilities.
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Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
Sounds like Yank is the overwhelming favourite and, with those kind of short times, I can understand why.
A few years ago, if someone told me that you could pull a 1.2-1.3 60' in a street car with drag radials, I would've thought they were nuts. These cars are truly amazing.
I'm thinking of doing the PAS 3800 myself, because I'm pretty sure I'm going to do a cam change and supercharge my car. My only worry is that I see that it is only rated for 650 HP, which looks like what yank rates all of its 9.5" converters at, whereas the 10.5s are rated at 1000hp.
A few years ago, if someone told me that you could pull a 1.2-1.3 60' in a street car with drag radials, I would've thought they were nuts. These cars are truly amazing.
I'm thinking of doing the PAS 3800 myself, because I'm pretty sure I'm going to do a cam change and supercharge my car. My only worry is that I see that it is only rated for 650 HP, which looks like what yank rates all of its 9.5" converters at, whereas the 10.5s are rated at 1000hp.
Safety Car
Joined: Apr 2010
Posts: 4,231
Likes: 451
From: Maryland
Thread Starter
Racer
Joined: Oct 2013
Posts: 466
Likes: 3
From: Carol Stream IL
St. Jude Donor '14
Well its settled. Called up the local speed shop and ordered myself a Yank SS3600. Two week lead time on the build, but should be getting the converter and trans cooler done in early June.
Thanks everyone for the input, it greatly helped me decide which company to go with.
Thanks everyone for the input, it greatly helped me decide which company to go with.
Drifting
Joined: May 2005
Posts: 1,655
Likes: 8
From: Avon Indiana
St. Jude Donor '09
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
Anybody know what the stall torque ratio is on the PAS converters? They're not on the STR list that Yank has posted on its website. They say that this series will "couple up quicker and multiply torque harder", but not sure what that means in terms of what they are comparing it to?
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
but once I went cam and then heads and cam the best with the weight back in the driver me 297 lbs was a 1.45 so the Yank cut 0.11 better. it drives on the street great, better then the vig as it couples quicker and goes into converter loc at a lower mph and stays locked until you give it a lot more gas pedal, were the vig if a fly landed on it would come out of overdrive. I'm really happy with it
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
I had a 3800 vigilante so I wanted a 4200 4500, since Norm's 60 ft was so spectacular. Norm set me up with Dave at YANK direct. since I had around 500 rwhp and nitrous on the car they built the PA and it only comes in 3800, it lowered my 60 ft from 1.45 to 1.34 best on a light part throttle launch ft brake around 2000 rpm and roll easy into throttle to the floor 4 cars out, or I smoke the hoosiers. my best 60 ft with the vig was 1.41 with bolt/ons and weight reduction of a 150 more lbs the driver but once I went cam and then heads and cam the best with the weight back in the driver me 297 lbs was a 1.45 so the Yank cut 0.11 better. it drives on the street great, better then the vig as it couples quicker and goes into converter loc at a lower mph and stays locked until you give it a lot more gas pedal, were the vig if a fly landed on it would come out of overdrive. I'm really happy with it
but once I went cam and then heads and cam the best with the weight back in the driver me 297 lbs was a 1.45 so the Yank cut 0.11 better. it drives on the street great, better then the vig as it couples quicker and goes into converter loc at a lower mph and stays locked until you give it a lot more gas pedal, were the vig if a fly landed on it would come out of overdrive. I'm really happy with itSo you're the guy responsible for this new line of Yanks, eh?
Sounds like the PAS3800 is a slightly tighter version of the SS4000 (maybe a stator tweak?) and the 3400 is a tweaked SS3600??
Thanks again. This is very helpful info.
Safety Car
Joined: Apr 2010
Posts: 4,231
Likes: 451
From: Maryland
I had a 3800 vigilante so I wanted a 4200 4500, since Norm's 60 ft was so spectacular. Norm set me up with Dave at YANK direct. since I had around 500 rwhp and nitrous on the car they built the PA and it only comes in 3800, it lowered my 60 ft from 1.45 to 1.34 best on a light part throttle launch ft brake around 2000 rpm and roll easy into throttle to the floor 4 cars out, or I smoke the hoosiers. my best 60 ft with the vig was 1.41 with bolt/ons and weight reduction of a 150 more lbs the driver but once I went cam and then heads and cam the best with the weight back in the driver me 297 lbs was a 1.45 so the Yank cut 0.11 better. it drives on the street great, better then the vig as it couples quicker and goes into converter loc at a lower mph and stays locked until you give it a lot more gas pedal, were the vig if a fly landed on it would come out of overdrive. I'm really happy with it
but once I went cam and then heads and cam the best with the weight back in the driver me 297 lbs was a 1.45 so the Yank cut 0.11 better. it drives on the street great, better then the vig as it couples quicker and goes into converter loc at a lower mph and stays locked until you give it a lot more gas pedal, were the vig if a fly landed on it would come out of overdrive. I'm really happy with it
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Thanks for the in depth review. Being I drive the car it looks like the 3800 for me unless the Yank SS4000 would be "every bit" as good as the 3800 on the street which I think is unlikely. I "maybe" doing a C7 down the road so I will wait till I make my mind up before doing anything else to the C6.