i'm running dual walboro 340's from racetronix
Idle is right around 58psi then when the other pump kicks in it gets up there pretty good
The second pump is setup on a hobbs switch .I was considering unplugging it or turning it up to fire up to a higher boost level

 

What are you doing for fuel lines? I bet you are maxing out the flow of the return line. I'd consider running only one for a test at lower boost and see if you can get the timing / fueling corrected.

Do you have any clue what happened to Seth?

 

thats awesome. get a nice alk injection kit and tuned right; laugh at the STS all day :yesnod:

 

I have no Clue what happend to Seth ..Sam another guy at combo was very tight lipped about it sorry to see a guy like him outta the picture
He was one smart cookie


LoL STS kit
Funny you mention an alky kit i happen to have an aquamist 1S kit sittin around
Just waiting to see where i can get with the stock intercooler

 

In response to GMC Ski, you noted that his rise in fuel pressure from 58 at idle to 78 PSI was throwing his PCM fueling tables way off. I am curious as to what is happening here and how this rise in pressure can be controlled. I currently have a Whipple at 10 PSI with alky injection. The Whipple (WEFI) computer is pulling boost (as designed) when I shift from 3rd to OD at about 70-75 mph because the WEFI is reading <700mv on the O2 sensor and therefore thinks I am lean. I initially thought I was running the stock fuel pump beyond it's capability, but a fuel pressure gauge shows that I am at 58-60 at idle and then it rises to about 72-75 under WOT. Stock regulator and stock fuel pump. I have access to AutoTap but I don't know what to log as a starting point. I guess my ultimate question is this: should I try an aftermarket FPR to attempt to eliminate this pressure spike? If not, what might I look at doing? I think I might just have to get some 42lb injectors and tuning to rid myself of the WEFI. ANY help would be appreciated!

 

SKI I run a MSD rpm activated switch. It works pretty well, its adjustable and goes behind the hobbs. The right solution would have been a larger return line but I didn't get to it. Seemed to work pretty well for me.

You've got a heck of a ride, once dialed in you could shake up the fastest truck list

 

if seth is gone does that mean that was the last of the Cmotorsports single turbo truck kits? if so you and parish are the luckiest bastards i know.

 

Seth is still there. I dont know where this came from. I talked to him yesterday. He owns the place w/ sam i'm pretty sure. Dude practically lives there. When I spoke to himin Dec or so he was there over 80 hrs a week. I dont think much has changed.

 

Hey GMC,

keep us updated, i very interested on how you are going to fine tune this monster.

i talk to seth all the time, he is definitly still at CM.

 

I'm running stock lines with the setup
gotta figure out how to fix this issue
Gonna do some testing with just one pump on and see what happens

Coontoot I would eliminate the whipple computer for sure and get some larger injectors .There are too many vairables with it there

Well as according to Sam In his words Seth is Gone
Weather or not Sam is bullshitting me or not that I don't know
You guys call and let me know
But I'm fairly sure they're not lying to me