upgraded injectors are in...but...
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upgraded injectors are in...but... ...KR is kicking in at or around 3900 rpm...
we (cablebandit w/ me watching) couldn't tune it out either...
no matter what adjustments were made to fuel or timing, the KR would kick in and begin to rise...
we believe that stock fuel pump and ProCharger supplied in-line pump are not keeping up...injector DC was at like 68%
thoughts...opinions...ideas?
p.s. does anyone have any experience(s) w/ TRE Performance? ...looking at their fuel pumps...
...in-cab FP & wide-band gauges are definitely high on the priority list now...
we (cablebandit w/ me watching) couldn't tune it out either...
no matter what adjustments were made to fuel or timing, the KR would kick in and begin to rise...
we believe that stock fuel pump and ProCharger supplied in-line pump are not keeping up...injector DC was at like 68%
thoughts...opinions...ideas?
p.s. does anyone have any experience(s) w/ TRE Performance? ...looking at their fuel pumps...
...in-cab FP & wide-band gauges are definitely high on the priority list now...
Last edited by Superado; Sep 8, 2006 at 09:05 AM.
If you cant tune it out by making it rich or really dropping timing it may not be 'real' knock. I turned my knock sensors off long ago, forged pistond rattle, valvetrain noise, exhaust hitting etc can set them off. if you are only at 68% and your a/f is rich enough (11.5-12.5) and you dont have crazy timing (21-24* at 4000rpm or so is OK) then I would try some better fuel like 104 unleaded and see if it goes away - if it doest you can make them less sensitive. I havent had knock sensors on my car in 2 years, I just use good gas and a reasonable tune.
It could be knocking though, 4000rpm really isnt the spot it should be rattling, it has low boost and you wont see max torque until ~5200rpm or so with a D1. Just approach the whole thing with caution - better safe then sorry
It could be knocking though, 4000rpm really isnt the spot it should be rattling, it has low boost and you wont see max torque until ~5200rpm or so with a D1. Just approach the whole thing with caution - better safe then sorry
Al, I was talking to Jerry earlier. Google Batlground performance. They have the Walbro 255lph pump you need for a decent price. They are over near me on S. Atlanta Rd. Thats where I got mine.
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Should be installing a Walbro 340 high pressure in-tank this weekend...I hope this cures it...
Plan on running it alone w/o the ProCharged supplied in-line...
I have had one of them fail already and I just believe that it is contributing to this issue, as well as the stock in-tank one...
Plan on running it alone w/o the ProCharged supplied in-line...
I have had one of them fail already and I just believe that it is contributing to this issue, as well as the stock in-tank one...
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last time I checked fp, it was 50#'s @ idle...haven't checked it @ wot on current set-up...what's ironic is that the rpm level I was maxxing old injectors at is about the same level I am now starting to get kr that rises quickly...
last time I checked fp, it was 50#'s @ idle...haven't checked it @ wot on current set-up...what's ironic is that the rpm level I was maxxing old injectors at is about the same level I am now starting to get kr that rises quickly...
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From: Norn Iron
Originally Posted by Superado
...in-cab FP & wide-band gauges are definitely high on the priority list now...
Some form of AFR monitoring is vital.
You can rely on the knock sensors, or you can make up a simple set of "det cans" as some call them.
Basically a bit of copper tube, flattened and bolted to the block. Attach a bit of rubber hose, and route this to a pair of ear muffs in the car, for someone to wear.
Its surprising the noises they pick up, but detonation is quite apparent once you know how it sounds. Even mild pinking is quite noticeable.
Your ears are a better filter than relying on knock sensors.
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been rained out last couple of days...should get the Walbro in tomorrow...any need in wiring upgrades?
also...anything I can do to correct the fluctuating fuel level while I have the tank dropped?
also...anything I can do to correct the fluctuating fuel level while I have the tank dropped?
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working on getting the WB right now...
BTW...the upgrade was from stock (24# I believe) to 42/44# shorties...
Thanks guys/gals for any and all help on this...
BTW...the upgrade was from stock (24# I believe) to 42/44# shorties...
Thanks guys/gals for any and all help on this...
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Well...Walbro was a fairly easy install last Thursday...with cablebandit and quicksilverado's help that is...runs alot better, but still getting knock retard...going to remove pvc valve...SeaFoam the intake thru the vacuum line and replace the pcv with a Moroso breather that I will eventually tie into my new y-pipe (already have filter on pass. side @ filler neck location)...hoping that the pcv puking oil is the culprit responsible for the knock retard...
no doubt...no wideband and I am terrified trying to tune this thing. The trucks do get false knock but we got audible at 17 deg so i know some of it is real. I figured he should be able to handle that timing with his low boost...intercooler and little bit of alky. Truck always had the stock pcv on it so who knows how much oil is in there
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Moroso breather won't fit due to the coil bracket...
going to attempt to raise it past the bracket using a heater hose fitting and a piece of hose as a coupler...
that way, I will still benefit from the breather allowing puked oil to drain back into the valve cover...
going to attempt to raise it past the bracket using a heater hose fitting and a piece of hose as a coupler...
that way, I will still benefit from the breather allowing puked oil to drain back into the valve cover...
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before Walbro it was 50# at idle...don't know what it was at WOT...
w/ Walbro in-tank installed and ATI supplied in-line removed...haven't checked it yet...should have @ idle #'s by tomorrow...don't have an in-cab fp gauge yet...will have to wait awhile, now that I bought the wideband...maybe I can run one up to the windshield and tape it on to check @ WOT...
w/ Walbro in-tank installed and ATI supplied in-line removed...haven't checked it yet...should have @ idle #'s by tomorrow...don't have an in-cab fp gauge yet...will have to wait awhile, now that I bought the wideband...maybe I can run one up to the windshield and tape it on to check @ WOT...
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well...DJ WBC is in...thanks goes out to cablebandit and the whole crew @ Mableton Speed Shop...oh yeah...he IS the whole crew...
cruising is @ 14.7...
WOT is about 12.5...
jumps to 13 and some change at shift...then back to 12.5...
gonna have Jerry stroke the tune a little this evening...
cruising is @ 14.7...
WOT is about 12.5...
jumps to 13 and some change at shift...then back to 12.5...
gonna have Jerry stroke the tune a little this evening...
Depending on boost the trucks can't take alot of timing due to the heavy load it's trying to push.I've had 6.0l's run 12 degree's with 8lbs of boost before. Also setting the PE to come in alot quicker helps(stock is 90% throttle),well helps alot.