Where should the timing be set at when idleing for an 88 305 TPI with the advance plugged in. Also about where should total timing be at WOT. What could cause the timing to be too far advanced? My base is set @ 6* BTDC.

 

I was getting 35* advance at idle, I think thats too high.

 

anybody know?

 

I think that's in the right ballpark

 

Will too much advance cause the car to buck and hesitate at WOT?

 

Too much advance will cause the car to ping. Sounds like you may have another problem. Did you do any other work on the car recently or were you just checking your timing?

 

I may not have actually gone WOT before the mods so it is difficult to say what may have caused this problem. But this is what I have.


I have a 1991 TA TPI 305 w/5 speed.

It is modified with:

SLP headers and 3" exhaust
Crane Cam
SLP intake runners
SLP air foil
SLP High Performance chip
Crane roller rockers
TPIS big mouth intake
Accel 23# injectors
AFPR set at 47 psi
Racetronix high flow/pressure fuel pump and wiring harness
New fuel filter
All new ignition items (wires, cap, rotor, etc)
Jacob's Pro Street Ignition

The car is very fast and responsive except at WOT.

At WOT the car jumps and hesitates. Right before WOT everything is fine.

What could be causing this?

I am going to put my stock chip back in to see if the advanced timing is a problem or maybe something else with the chip?

I already put the ignition back to the stock coil and it didn't make a difference so it is not my Jacob's Ignition.

I am really puzzled.

I am thinking I need to do some tuning with the injector constant in the prom or some other programming because of the extent of my modifications.

Thanks for any suggestions.