converter slippage

[ttypewhite]

I went to the track yesterday and had issues with my converter. i launched the car with 10psi and as soon as it hit 6000rpm, it stayed at that rpm throughout all my gears. It was almost like it had one gear all the way down. I data logged my runs on the FAST, and when I play it back the whole pass from start to finish was using just 2 numbers on the VE table for my base fuel map at 5800 to 6000rpm. How much et and mph would be a realistic gain once the converter has been tightened up? Despite driving through the converter it still ran in the 10's.

 

[norbs]

Well from my log you can see my tranny slipping also, but the stall rpm@25 psi is 5350 rpm. I looked at your file it is 5700 on your car. You shifted 1-2 around 5700 so you did not see a rpm drop. I would say you need to take 200 rpm out of the converter no more or less.

 

[EightSecV6]

Mike,
I looked at your 4th pass.log, You shifted at 6200 and the rpms dropped to 5700, the converte look like it is on the money to me??????The higher you shift, the tighter it will couple.

 

[chris718]

interesting data.converter is not working properly though in my opinion.

 

[ttypewhite]

Mike,
I looked at your 4th pass.log, You shifted at 6200 and the rpms dropped to 5700, the converte look like it is on the money to me??????The higher you shift, the tighter it will couple.

Thanks Billy, maybe its that 18 degrees of timing from start to finish that makes the car feel lazy between shifts. I don't know how much further I can pull out the rpms on this 212 flat tappet cam, but I will try it again with more boost out of the hole and at least 24 to 25 degrees of timing and see what happens.I am just amazed at how well this motor performs after being in the car for 6.5 years now and doesn't skip a beat.

 

[norbs]

Well chris i don't think its my converter but the clutches/band slipping in the tranny under full boost, if your refering to the log i posted. That converter is a ckperformance 9/11' (aka tcs converter)rated at 3400 rpm instead of 3800 rpm, which was netting me a stall point as i call it of 6000 rpm, it is now 5350 rpm

 

[ttypewhite]

Norbs, check your tranny fluid and see if it smells burnt.

 

[EightSecV6]

Thanks Billy, maybe its that 18 degrees of timing from start to finish that makes the car feel lazy between shifts. I don't know how much further I can pull out the rpms on this 212 flat tappet cam, but I will try it again with more boost out of the hole and at least 24 to 25 degrees of timing and see what happens.I am just amazed at how well this motor performs after being in the car for 6.5 years now and doesn't skip a beat.

Add PSI to your logs too so I dont have to think too hard for boost conversion LOL!

 

[Otto J]

My convertor drops about 1400 on a shift depending on shift rpm,Shifting at 7200 it will drop back to 5800.According to TCI calcs out to about 9.1 % Slp

 

[norbs]

Add PSI to your logs too so I dont have to think too hard for boost conversion LOL!

Yes the kpa is frustrating, and whats with the high air temps?

 

[EightSecV6]

Shifting at 7200

Were'nt you using a 224 hydraulic roller?

 

[Otto J]

226 at .050 544 valve lift w 1.60 rocker according to the cam card

 

[ttypewhite]

Add PSI to your logs too so I dont have to think too hard for boost conversion LOL!

he he he. I didn't know that was a option :redface: