Timing after headswap

[97GTSTANG]

I have a 02PI headswap on my 97GT and I am currently running the steeda T/A, i have it set at 13degrees. I was wondering if thats too much since the car has a higher compression ratio (is it 10:1?). Will raising the timing cause it to lean out or get richer? Or should I just keep it back at 10degrees? I do use 93Octane

 

[chimchim]

97 Stang, Do a search on this subject. I just asked this two days ago and there were many helpful answers. Pretty much most people said to leave it stock 10*. One guy that can only get 91 Octane actually got a custom tune for -2*. You'll make up in compression what your buddy with a stock 99-04 will gain with a TA.

 

[97GTSTANG]

Thanks Chim, so is the compression now a 10:1?

 

[chimchim]

I've seen anywhere from 10.0 -10.5 to 1 on here. I guess it depends on your block and your heads and how they come together.

 

[97GTSTANG]

I will bring the timing back down to 10 and see how much difference it makes.

 

[CanadaStang]

I will bring the timing back down to 10 and see how much difference it makes.

If you have no pre detonation issues, I wouldn"t be concerned.

 

[CanadaStang]

I have a 02PI headswap on my 97GT and I am currently running the steeda T/A, i have it set at 13degrees. I was wondering if thats too much since the car has a higher compression ratio (is it 10:1?). Will raising the timing cause it to lean out or get richer? Or should I just keep it back at 10degrees? I do use 93Octane

Advancing the timing has no effect as to rich/lean.Although richening the a/f mixture will cool the combustion chamber a certain amount, which in turn will help pre detonation if the timing is too far advanced.

 

[97GTSTANG]

i dropped the timing back to 11 degrees and the car seems to drive a little better and less ticking and ratling from the engine, i dont know if its in my head but seems like it helped.

 

[CanadaStang]

i dropped the timing back to 11 degrees and the car seems to drive a little better and less ticking and ratling from the engine, i dont know if its in my head but seems like it helped.

Well thats good to hear. Just noticed you have the zex 75 shot, I was doing some research on the Zex, seams like a good system. How do you like it?

 

[97GTSTANG]

LIke the Zex kit, it was really easy to install and u can change the jets and get up to 125HP shot. I am just using 75hp shot now. When i get it tuned I will boost is up to 100Hp shot.

Well thats good to hear. Just noticed you have the zex 75 shot, I was doing some research on the Zex, seams like a good system. How do you like it?

 

[CanadaStang]

LIke the Zex kit, it was really easy to install and u can change the jets and get up to 125HP shot. I am just using 75hp shot now. When i get it tuned I will boost is up to 100Hp shot.

Is that the dry shot? It's great to hear from someone who has tried the Zex, it sure seamed like a nice system but I was holding off till I had chance to ask someone who had it, just to see if it was as good as it looks on paper. Thanks for the info

 

[97GTSTANG]

Yes, it is a dry kit. Got an MSD on the way so its rpm activated.

Is that the dry shot? It's great to hear from someone who has tried the Zex, it sure seamed like a nice system but I was holding off till I had chance to ask someone who had it, just to see if it was as good as it looks on paper. Thanks for the info

 

[CanadaStang]

Yes, it is a dry kit. Got an MSD on the way so its rpm activated.

Very cool indeed.