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 LS1M scanning

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1998 Riv
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Name : Dave
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PostSubject: LS1M scanning   Tue Jul 10, 2007 1:43 pm

Finally took the time to hook up the LS1M at lunchtime today, first time since doing my meager mods. I tried logging, will have to see how that turned out later on at home. BUT, I also ran it in gauge mode, and watched boost and KR numbers from zero to about 80mph. Boost topped out at 9.41 psi, and KR wasn't looking too bad, until 1-2 shift... then it maxed at 6.15, under WOT. That's a bit on the scary side! During normal driving and acceleration, didn't see any KR at all. DEFINITELY won't be heading to the track again any time soon. Gotta get that FWI built and front PEM installed. teach
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AA
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PostSubject: Re: LS1M scanning   Tue Jul 10, 2007 2:45 pm

This would explain your recent track times. neutral

What was the temperature out when you scanned? 6 deg KR is concerning. A down pipe would help, PEMs too. I'd wait on the FWI. It cools the air, but also lets more in, so a double edged sword. Maybe instead of spending $ on a tuner, a Mini AFC could help you add some fuel for less. I used one for a while with success.

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'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
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Mr.Riviera
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PostSubject: Re: LS1M scanning   Tue Jul 10, 2007 3:19 pm

could be false KR too. if its only occuring at the shift then maybe your tranny is just shifting hard and the sensor is picking up the vib/knock? do you have any scans with the 3.8" pulley on?

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PostSubject: Re: LS1M scanning   Tue Jul 10, 2007 4:16 pm

Aaron, temps were in the upper 60's, nice cool day here today. I'd def like to see what the DP and front PEM would do to the those KR #'s. The FWI would not be first. Gotta bring that PEM back to work and wire brush so I can spray it. Not familiar with the mini-AFC, but I thought I've read they are not a particularly recommended way to go anymore?

Matthew, my tranny shifts about as soft as my daughter's pillow... before the 1-2 shift I saw #'s in the upper 2's, then it spiked. With the 3.8 pulley I saw max KR around 1.1 or so. I'm running 92 also. ECT showed around 190deg, so it's not really running hot either.

Rather than buying a tuner, which I'd have a real hard time finding free time to learn to use, and then USE, would be great to find someone up here that does this for a living.

I think even the W-body guys around here drive 4 hrs south to SF, SD to get a tune.
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AA
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PostSubject: Re: LS1M scanning   Mon Jul 16, 2007 1:31 am

I think your KR is real. I almost always see a burst right after the shift into 2nd and 3rd gears. It's very real in my case, as I've been able to tune it out.

_________________
'98 SC Riviera 268k miles 298 HP/370 TQ 0-60: 5.79s ET: 13.97 @ 99.28 4087 lb 20.1 avg MPG Nelson Ledges Lap: 1:30
3.4" pulley AL104 plugs 180 t-stat FWI w/K&N 1.9:1 rockers OR pushrods LS6 valve springs SLP headers ZZP fuel rails
KYB GR2 struts MaxAir shocks Addco sway bars UMI bushings GM STB Enkei 18" EV5s w/ Dunlop DZ101s F-body calipers
EBC bluestuff/Hawk HP plus SS lines Brembo slotted discs DHP tuned Aeroforce Hidden Hitch


'05 GTO 49k miles 0-60: 4.8s 16.9 avg MPG Nelson Ledges Lap: 1:26
Because fun
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curious riv
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 4:46 pm

i dont have a scanner yet and i think i should b a lil concerned about the double edged sword AA mentioned. my only mods are 180* stat and custom gtd air bx/fwi. im thinkin if i stuff foam in my fenderwell it will block it little of the air flow thus killin the double edged sword. yet still gettin cooler air from outside the engine compartment. ANY THOUGHTS??? scratch
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ewolfe0050
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 5:09 pm

Did you do your run with the traction control off? If I leave mine off I get KR at the same spot.
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curious riv
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 5:16 pm

after reading what i just wrote- it sounds kinda stupid and childish... but im still curious scratch
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 9:05 pm

You guys who are fighting KR problems - have any of you loaded the '05 GTP timing table? I think that's the root cause of a lot of part throttle KR. Compare that table to stock and it should be obvious where the light throttle very high timing sits... and I think that might be part of the problem.
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98riv
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 9:20 pm

c-taylor-6 wrote:
i dont have a scanner yet and i think i should b a lil concerned about the double edged sword AA mentioned. my only mods are 180* stat and custom gtd air bx/fwi. im thinkin if i stuff foam in my fenderwell it will block it little of the air flow thus killin the double edged sword. yet still gettin cooler air from outside the engine compartment. ANY THOUGHTS??? scratch

You will be fine with your gutted air box/fwi. Don't bother with the foam or anything. You won't get a bunch of knock from an intake unless you do something very wrong. Can it make a bad situation worse? Possibly. On a stock engine you should be fine. You need to get a scanner if you plan on modding any further so that you can be certain what your kr is.

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1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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curious riv
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PostSubject: Re: LS1M scanning   Sat Nov 08, 2008 9:38 pm

gotcha, 98riv. thx. after catchin up on regular maintenace, scanner is 1st on the list. i dont like not knowing what she's doin. feels like i have another kid and havent takin her to the doctor for a check up yet(yeah im a lil weird)
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