Question Regarding Ignition Timing And Boost

[Turbz RB-25]

Hi guys,

I have another thread open regarding my boost droping and power loss after my cams went in.

Any how, I purchased an Apexi Power FC boost control kit to stabalise my boost (I had a cheap $20 manual boost controller previously).

Currently, I am running 14 degrees ignition timing at the top end at around 16psi, so my question was, when I get my boost control kit installed and the boost stabalises back to 18psi as it was before without the cams, will the timing have to be further retarded because of the increased boost?

Or can the tuner just richen the AFR and leave the timing as is?

Currently the car is making around 260 rwkw with my GT2835 Pro S and and cams (256 inlet and 260 outlet) and all the other mods at 16 PSI, and 14 degrees of timing at the top end

Previously, my car was making 273 rwkw without the cams at 18 PSI with 18 degrees of timing at the top end.

Tuner said the loss in power is because the drop in boost and because he had to retard the timing due to a bad bacth of fuel (which I hope what he is saying is tru)

What do you guys think?

ANy help would be great, cheers.

[Guilt-Toy]

i love reading little puzzles and adventures like this.

Think of it like this, your trying to put together a 10,000 piece jigsaw puzzle with only 7,000 pieces.

wait for it...

....

With your eyes closed.

Hope this helps.

[Turbz RB-25]

i love reading little puzzles and adventures like this.

Think of it like this, your trying to put together a 10,000 piece jigsaw puzzle with only 7,000 pieces.

wait for it...

....

With your eyes closed.

Hope this helps.

Buddy, I think u solved my issue....

Any other takers??

[VB-]

as a very general rule, take 1 degree of timing out for every 1.5psi of boost you increase (or maybe its the other waya round), but you really gotta know which part of the map to take it out of, and make sure you've got some decent form of knock detection in place while tuning.