for those supercharged, at what pulley/psi do you start to pull timing and if so how much across the band is a good rule of thumb being conservative and of course only using premium octane...?

I know the best way to go about it would to get a J&S safeguard or even OBD log and see if any is pulled...then keeping retarding with emanage until it no longer does but nonetheless when in your experiences (at what pulley/psi) have you had to retard the timing using a modest 12 or 12.5:1 AFR and premium octane gas...?

 

Yes, just because u have a good a/f doesn't mean that you're timing is good.

My last motor blew at a freaking 11:1 a/f ratio.... culprit was that timing was too advanced since I was using the emanage injector correction, AND pulling fuel.... scary stuff... I think you're on the ball, J&S with a obdII log will do you right.

 

You really don't need to pull any timing below 10 psi or so. the general rule of thumb is to pull timing right before peak torque

 

i have the j&s and i start pulling timing after 10 psi at 2 degrees. seems to work good for me, i still have good power all around.

 

The way to do it RIGHT is to get your car on a load dyno and tune for MBT (minimum best torque). But this can get expensive of course, depending on your setup. Especially for turbo guys who might be tuning at multiple boost levels and with various fuels (93, 100, 110, 116, etc). I'm thinking about just taking the plunge and doing it after I get my car setup in spring.

Right now I just start pulling timing at 8psi pulling 2 degrees per psi above that until 5000rpms and then adding back half a degree per 500rpms until redline. This is probably overkill which is why I want to get the car on a dyno to be tuned.

 

hmm...so if under 10 psi stock timing is fine eh?

but nealoc you are T/C'ed so you need to pull timing at your spool up rpm...

whereas with s/c'ed guys, timing would have to pulled linearly but only starting at when we hit around 8-10 psi and thenforth until it passes peak torque, then we start adding back it sounds like...

 

it only pulls timing when it sees the desired rate which is 10 psi for me, at anytime the unit senses less it puts it back to regular timing. for s/c its very simple how long do we really see high boost, not long.

 

What's the model number for the J&S.

 

this is the site, its a lovely peace of equipment for peace of mind.
after seeing mardigras use this succesfully i had to have one. i went thru three motors before the j&s and since the install im still in one piece. on a few ocassions i detonated and the j&s went into action
http://www.jandssafeguard.com/

 

Do you need J & S even with lets say Emanage Ultimate ?? or would that be overkill ??

-matt