parish8

iTrader: (6)

i would guess that this would apply to the turbo guys more than the supercharger guys. i see alot of boost even at 2000rpm, i have a 8lb pully on there and see at least 5lb at 2000rpm at only 50% throttle. this causes a problem, i get audible knock, if i floor it i have no knock even though i see more boost but at part throttle i don't think i am getting enuff fuel.

ls1edit shows 85-90% tps required before PE kicks in, i am thinking about droping this to something like 40%. anyone have any views on this idea?

GMC SKI

I would definatly say lower it mine is set at like 50% right now
you'll notice a big difference, you'll be enriching power earlier. with the whipple you can make full boost at lower rpms
So i would say for sure do it my truck was way more reponsive when we did that.
Do it in small steps and log it with atap
jim

MelloYellow

I'm a bit confused. Can someone explain a bit more in detail what we're talking about here? Does this help/apply to Supercharged setups?

Thx!

parish8

iTrader: (6)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MelloYellow:
<strong> I'm a bit confused. Can someone explain a bit more in detail what we're talking about here? Does this help/apply to Supercharged setups?

Thx! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">well it seems to apply to my supercharger set up, i am geting 5lb of boost at 2000rpm and 50% throttle but the PE hasn't kicked in yet so the airfuel ratio is still at 14.7-1 or whatever the computer shoots for when in closed loop. i was just wondering if anyone else has had this problem and if the fix was as simple as going into PE mode sooner. seems like it would be an easy fix.

Cool28

iTrader: (2)

In PE does it look for a dif a/f or what?

parish8

iTrader: (6)

when in PE mode it stops looking at the o2's and goes to a preset amount of enrichment, with ls1edit you can adjust this to get the proper A/F ratio but you nees a wideband to do it right.

my stock program doesn't go into the PE mode untill 90% throttle. i think it should go sooner since i make most of my boost without having to actualy floor it. i can be at 80% throttle and 6psi of boost making 300hp and the computer is still trying to keep my A/F ratio at 14.7-1(too lean). just figured someone around here would have been thru this allready.

Blackbird

what your saying makes total sense.

do it.

Cool28

iTrader: (2)

Ah I got ya sounds like a good idea. Maybe thats why mine feels like it lag passing people hmm.