does anyone know what the appropiate mph point would be if shifting at 6700rpm's?? 1st>2nd shift and 2nd>3rd shift... I keep hitting the rev limiter in the 2nd>3rd shift.... help please..... oh almost forgot, 26in tall tire is being used...

 

Try this place...

http://www.geocities.com/z_design_st...ion_z28_6.html

You just have to change the trans gear ratios if you're an A4. If you dont know the A4 ratios they're on tech, I just dont know where.

 

Even if you know the gears, you have to adjust for
torque converter slip (and its dependence on engine
torque) and transmission cycle time. The 2-3 is slow.
You are going to have to "lead" the actual event to
git 'er done in time. MPH and RPM, I expect it's MPH
that has to come in. Cut and try.

 

I forgot to add that ^. I lowered my shift point to 5750rpm and it shifts at roughly 6100rpm. Thats w/ a 4000 stall converter.

 

im having the same problem but noticed it only after installing 3.73s

 

Heres another link that can help you out alot. I helped me a bunch, since I have 4.10s. Here:http://www.f-body.org/gears/

 

Those gear calculators work great for manuals, but for autos you need to factor in the converter slip as Jimmy said. Here is an image showing why you should not use those calculators without factoring in %slip.

Gears will also affect the RPM/MPH shift point due to a faster rev speed and a need to "build up" pressure, you will need to take some rpms/mphs in account to shift right where you want.

 

I agree with you completely. That is something I should have said also cause I had to lower my mph/rpm shift points to get it right. Those calculators are a good starting point IMO but not perfect. Every car is different with gears, stalls, weight. I just used those as a base and went from there. Trial and Error when you have to do it on the street . Takes awhile. Thanks.

I hope this helps you Juice Junkie.

Ski

 

it sure helps...thanks alot guys....I got it sorted out