Rail Pressure past 3000 RPM

[JoshH]

I was at a dyno event today, and on my truck and another LBZ, once the RPMs hit 3000 the rail pressure starts to take a major dive. I was wondering if there is a table somewhere that could fix this or if there is something I'm missing. On both trucks it was holding right at 26,000 until that point, and it immediately started dropping as soon as it hit 3000. Thanks.

[vortecfcar]

B1014 and B1015 would be the first place I would look...

Keep us posted,

Nick

[MMLMM]

I was at a dyno event today, and on my truck and another LBZ, once the RPMs hit 3000 the rail pressure starts to take a major dive. I was wondering if there is a table somewhere that could fix this or if there is something I'm missing. On both trucks it was holding right at 26,000 until that point, and it immediately started dropping as soon as it hit 3000. Thanks.

What was the rail press. at and after 300rpm?

[JoshH]

Nah, those are both good.

[JoshH]

I went back and looked at my log. Mine wasn't holding 26k, it has holding 24k, but as soon as I hit 3k RPM it started dropping like a rock, and by 3500 RPM it was sitting at 21k. The other guy was sitting at 26k at 3000, and by the time he got to 3500 it was also down to 21k.

[vortecfcar]

Maybe the pulse width is just too wide

[JoshH]

It may be. I just found it odd that both trucks started to drop at 3000 RPM and were at 21k at 3500 RPM. Didn't know if there was possible something in EFI that could help with this. Maybe a table that hadn't been found yet. Just throwing it out there to see if anyone else had noticed it before.