conv slip and fallback rpm
Moderator: Marty Chance
conv slip and fallback rpm
does anybody know what the % of slip is a good number?i have 8% now but the car works good, also it falls back 1000-rpm on the shift does this sound about right?
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Re: conv slip and fallback rpm
Sounds pretty good... What 1st gear are you using?
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Re: conv slip and fallback rpm
How are you measuring the converter slip? I can watch the tach for the amount of RPM fall after shift correct?
Are you using a data logger to figure that out?
thanks
Are you using a data logger to figure that out?
thanks
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434 small block
Best so far of 10.51 @ 131mph with a best so far 60' /1.46
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Re: conv slip and fallback rpm
ideal converter slip and fall back rpm ???? (great question) the amount of slip and fall back rpm is going to be different on every motor , remember the number one rule to make your car fast is - MAKE THE MOTOR HAPPY !! there is no short answer to this question . the longer your torque curve is the more you will want it to drop and if you run a p/g you have about 80% split between gears which can make it hard for the motor to recover the shift if it drops too much . Long story short - 900 to 1100 rpm is kinda rule of thumb drop on a p/g car and this may vary also with bracket racing versus heads up . Note less slippage is not always better , if the converter locks up too fast for the power curve of the motor , the motor will not accelerate as fast as it could have. Sorry for the over generalized answers , but i need more specific on your vehicle to answer more accurately , and this post will most likely create a lot more questions , so fire away . Marty Chance
Neal Chance Racing Converters
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Home of the World's Fastest Automatic Doorslammers!
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Re: conv slip and fallback rpm
thanks marty, its a t-400, i measure slip with a formula off of tci site, i can see the fall back rpm off of my playback tach everthing else aside i could not be more happy with my conv. and tranny just wasn't sure of slip and fallbackrpm.
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Re: conv slip and fallback rpm
to answer your question 8% and 1000 rpm drop on the shift sound like the converter is very close. Marty
Neal Chance Racing Converters
Home of the World's Fastest Automatic Doorslammers!
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Home of the World's Fastest Automatic Doorslammers!
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