I have a 96 LT1 with a t56 put a 150 wet shot on the car with a fullthrottle micro switch. I have LT1 edit and would like to use it to take timing out of the car. There isn't a timing vs tps table which would be awesome. The personnel at carputing said to set the load vs timing table to however many degrees I want out at 95 and 100 kpa. I did this and even went to 90kpa under any throttle there is no timing drop. I took a full 10 degrees out for testing purposes to be sure I could feel the car nose over. If I light up the tires about the time they start spinning good the retard kicks in and rpm drops like it should and everything, but as soon as I get traction back to full timing. Has anyone else tried this and have any idea how far down I'll have to go to get retard under wot? Before anyone asks I am not using nitrous during this test its motor only so I will feel the loss of power.

 

When I did my timing retard in the tune, I subtracted 2 degrees from 95kpa and up from 2800 RPM and up in the Load vs Advance tables. I then logged my car and saw that it DID show less timing than before.

I have no idea why yours would be different though.

Do you have traction control on the car?

 

Your car may not see 95-100 at WOT. This depends on a number of factors such as elevation, temperature, etc. Do a log first and see where your WOT range is, then subtract timing as necessary.

 

I guess the question would be "why take timing out of the stock tune and reduce your NA performance"? Why not use an external, tunable retard box, so you can keep max timing in the NA program?

 

Madwolf I don't have much experience with LT1 edit yet so how do I run a log and what am I looking for? I think the load difference is probably from different elevation as well as other factors. The reason I want to pull the timing is when I take the car to the track again I can simply load up the flash with the retarded timing so I can run nitrous without hurting the motor. I will be running full timing most of the time while on the street because I don't drive around with the bottle hooked up to my car.