HUGE problem with my predator!!

[babeabe19]

ok so im trying to "winterize" my GT. So i go back to the stock tune. change the oil, and a bunch of other winter things. Anyways, i drove my car after i put back the car from a 91 tune to the stock tune which ment resesting the Predator. i drove the car around and relized that the speedo was incorrect.

So i went to the "Factory HP tune" and only modified the axle ratio to 4.09 and the tire ratio to 812 . now when im on the freeway and im doin 2200 in fifth the speedo says im doin 85mph and if i do 3000 im doing 92!!!!!!!!!!!

How can i correct this? is my predator not giving my ECU the tune? Ive got 4.10s and 285/35/18 tires in the rear wats the correct setup on the predator?

 

[langod]

I have the same problem. I downloaded all the newest updates from Diablosport and still can't run just the Factory HP tune with only the gear ratios changed. So I put the Predator tune back in.
I really don't think you're going to have any more problem with the predator tune than the factory one. When in snow and ice you're going to be granny-shifting and keeping the RPMs way down anyway. At low RPMS the difference in torque and HP is negligable, plus the Traction Control will help keep everything going the right direction.

 

[MatthewP]

If you're really worried, just pull 10% timing out of the predator tune. I personally wouldn't worry about it though.

-Matthew