On the LD9 2.4L Twin Cam,
What are the typical peak and/or average spark advance numbers at wide open you guys are running with 15+ psi on 93 octane?



2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero

[ion wrote: C2]On the LD9 2.4L Twin Cam,
What are the typical peak and/or average spark advance numbers at wide open you guys are running with 15+ psi on 93 octane?

I can usually squeeze 15-18 degrees of timing depending on mods and how it likes it..... With Meth added, low-mid 20's.....





P&P Tuning
420.5whp / 359.8wtq

I guess 20 psi and 23 degrees would cause my lack of power increase + pre-ignition then. lol

I put colder spark plugs in and turned down the boost until I get HPTuners back to tune with.


2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero

[ion wrote: C2]I guess 20 psi and 23 degrees would cause my lack of power increase + pre-ignition then. lol

I put colder spark plugs in and turned down the boost until I get HPTuners back to tune with.

If this is without Meth, I bet that thing is knocking like a MOFO!





P&P Tuning
420.5whp / 359.8wtq

I'm currently running 32psi and my timing is at about 14-15 degrees but i'm running 110 in the car exclusively right now. At 26psi on pump I believe I was at about 18-20 degrees of timing.



President/Founder - 607 Motorsports

Well after putting in the cold spark plugs and fixing my vacuum/boost leak at the manifold->head location, it seems to perform much better, plugs and top of pistons look great too (@ 18 psi and 20 degrees).


2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero