How much timing should I retard for 8psi? Need to know before tune at 10am friday.

[Red-KAT]

Hey all you turbo nuts...

As some of you know I got my turbo all installed... A while ago... Had spark issues, but fixd them now...

Well anyways... I have been running about 8 psi on my Greddy kit for a few days now. But I started reading and got ideas of backing off my timing more... I already had it at -3 all across the board, and changed it to none under no boost and then -1.5 per psi (about)

So at 8 psi i'm at -12 timing...

Should I run this much? I know it kills HP a bit... Or should I just run like -2 across the board? When in boost of corse.

As you can tell I dont know much about timing yet...

I'll have some dyno #'s when I get back... (with mods listed)

Thanks in advance!

[TurboKA37]

ive heard about .5 degrees per psi of boost. what are you using to retard timing? just turning back base timing or do you have something like a msd?

[Structure240sx]

i've always heard and have been going by .5 per psi. so you SHOULD be backing off 4 degrees at 8psi. people are getting away with less but why risk it? i've been running base timing at 16ish degrees with no problems that i know of

[j-z]

yeah, youve got it retarded alot. id back it off about .7 -.8 degrees per psi.

[Red-KAT]

thanks guys... i thought i might have had to much off...

btw I am using the E-manage and the E-01 to do the little tuning... It retards timing based on air flow volts and RPM's...

Again thanks!

[C-Kwik]

I ran stock timing when I used an FMU. With the E-Manage, I backed off about 3 degrees at the highest airflow voltages and gradually decreased retard at lower airflow and RPM's. The only reason I think I needed to do this is becuase the ECU is now being fooled by the E-Manage. The ECU thinks it is getting less air than it actually is so it thinks the motor is under less overall load so it runs more timing advance. I had some light detonation otherwise. I'm only running 6.5 psi, so you may need a couple degrees retard more than I do.

[bbandit]

how do you retard it? from the TDC (0 degrees)?? or from the 20 degrees BTDC (NA KA stock timing)??

[huguetpj]

how do you retard it? from the TDC (0 degrees)?? or from the 20 degrees BTDC (NA KA stock timing)??

I'm pretty sure the emanage (as it is a piggyback) will retard timing from the base distributor timing... 20° BTDC in stock form.

[Red-KAT]

I put it at -5 under when my airflow hits 3.7 volts

I'm not to happy with my engine... Its weak still...

But its a vast gain over my stock power

Once I figger out how... I'll get the #'s up in a new thred.