MaKaVeLi

my rpm shift point is this



shift points: 1-2 : 5900
shift points: 2-3 : 5700
shift points: 3-4 : 5700

but when im racing the shift point 2-3 goes to 6200 and somtime goes to 6500!!

what could cause this issue??

any suggestion? somthing good but wouldnt hurt the car?


please i need help this car start to make me crazy !

mrtstang

No, you should be shifting past 6k to take advantage of those cams. You should be fine as long as your springs are in good shape. Why did you lower the 1-2 shift to 5900?

My cams are almost identical to your VT stage 1's, and i shift around 6200-6300 on average.

MaKaVeLi

so is it ok to shift past the 6 (redline)?? ?? what you suggest me to set my rpm shift? that would never hurt the engine

shift points: 1-2 :
shift points: 2-3 :
shift points: 3-4 :

mrtstang

Without seeing a dyno graph of your car it's hard to say, but in general i'd be looking around 6200 on average. The 1-2 shift could probably stand to be a tad higher, but again these are just estimates. You really need to have it dynoed to see where the optimum shift points should be.

MaKaVeLi

the maximum in the [redator is 6200 so you suggest that i switch from 5900 to 6200 for the 1-2? i know it woyld be better with dyno but im talking about the safe numbers.....

mrtstang

I would definitely up the 1-2 to at least 6200. You will be fine at that rpm.

MaKaVeLi

ok but somtimes it goes over than 6200 ! specially the 2-3 goes to 6500 and somtimes more :s, so should i change the 2-3 less then 5700 ? so it would never go over or rech the 6500?

smythge

Are you familar with how the 1-2 & 2-3 & 3-4 shifts happen? There is always a delay and that delay needs to be factored in when setting the shift points. Read this article and it will help you to set your shift points. http://tccoa.com/articles/tranny/tra...on/page3.shtml


here is some specific information on the delays in shifting http://tccoa.com/articles/tranny/tra...on/page6.shtml

I have my shift points set to

1-2 5,000
2-3 5,600
3-4 5,300

The actual shifts happen at about 6,000

smythge

Are you a manual or automatic transmission?

MU71L4710N

shouldnt be spinning past 6250~ on stock valve springs. the valves can float after that. if you had new valvesprings and stuff put in, your tuner may have done that on purpose (if u had it dyno tuned).