Sold the Dually, go a 93 K3500...Some last minute fuel pressure observations

[Acesneights1]

So I sold my Dually to a friend in NY and took his non running truck in trade for parts. Anyway as part of the deal I had to hook up the Autometer fuel pressure gauge that I had installed and never hooked up because I had planned a FTB at some point. Well, I t'd it in just before the IP with stck LP, Stock fuel lines and was pleasantly surprised at the #'s. Now my Dually had a Hot Heath tune(hotter than I wanted). I was towing an empty trailer which had some weight to it. At WOT the FP never dropped below 1 -2 psi and at normal throttle was 5-6. I thought that was pretty good for a completely stock fuel system. I had thought I would have been sucking a Vacuum bigtime.

 

[schiker]

The thing I notice about fuel pressure is that is depends on my application of right foot and roll up of rpm. If I just floor the go pedal it seems to hold higher pressure than if I roll into the fuel slower and let rpm's climb up to max then shift. ??????