LMM: Lmm pulsewidth??

[djms]

I have a 08 LMM and I have shimmed the fprv and have a ported rail fitting and a ppe lift pump and I was wondering how low I can bring the rail pressure? How much pw is too much? Im trying to figure this new rig out, hope to get it running better than the 04.

 

[Mike_S]

I wuldn't exceed about 3250 uS. Anyting more than that can't be injected into a useable window without lots of timing, and timing high enough to work with a pulse that big will bend rods and dislodge head gaskets.

on the rail pressure Higher is better, but if you can hold 20-21 KSI I would say thats acceptable.

 

[gmduramax]

You want the rail pressure at 26000psi. 3000 pulse width