Author Topic: GMPP Tune for GXP and Redlines (Read 48745 times)

snaponbob · « **Reply #75 on:** January 19, 2009, 08:40:54 PM »

Quote from: MGar on January 19, 2009, 04:48:22 PM

The car will cut out, and fall on it's face around 5-5.5K in 3rd & 4th. It will then pick up, and go again, but it's a serious detriment to performance, and longevity, given that it is indeed a knock event as I think it is.

And THAT has made my decision SOOOO much easier. No 93 octane in the KC, Mo. area. Lyndon gets my $500. I'll worry about 3 bar sensors later.

DeepBlueGXP · « **Reply #76 on:** January 20, 2009, 08:41:44 AM »

GXPinKC, get the westers tune, you'll save money and have a better/more powerful running car.

spicy3480 · « **Reply #77 on:** January 20, 2009, 10:25:08 AM »

The Westers tune has room for expansion also, with future updates being free. The GM tune has no updates, and if they ever did, you know they would charge for the labor and re-flash. Plus, Lyndon is hands down one of the best tuners anywhere.

GXPinKC · « **Reply #78 on:** January 20, 2009, 03:19:42 PM »

Quote from: DeepBlueGXP on January 20, 2009, 08:41:44 AM

GXPinKC, get the westers tune, you'll save money and have a better/more powerful running car.

Joe, yes, my heart tells me to get the westers tune for the reasons you mention, however, I am hung up on one thing, and that is, here in Kansas and Missouri only 91 octane premium is available, and I know the GMPP tune is based on the 91 octane, unless I am mistaken, although I know the westers tunes can be programed for the 93 octane. My wife is very conservative and like Whip, I have the long term warranty that I purchased at delivery. How did the warranty issue come down in your decision. Yes, it seems that the performance peramiters are much greater with the westers, from Lyndon and I assume he can tune for 91 octane as well, but then am I back to square one? I realized, if I am not mistaken that the Westers Tune from Lyndon is based on the 93 octane tune which of course would provide the better performance numbers as opposed to the GMPP tune. Darn it, why do I have to reside where 93 octane is not available? Your getting some frustration here...

As you are aware, I made my living as a Counselor helping young folks in College find their paths, and then stepped up to Administration as Director of Financial Aids. Now I do appreciate you guys stepping up and helping me make a decision on the right tune for us. Lots of things to consider, and I do appreciate any help you can give.
GXPinKC
Ron

Go-N Def · « **Reply #79 on:** January 20, 2009, 03:49:14 PM »

Ron,

Here are two quotes from MGar. He is running the GM tune, NOT Wester's. Lyndon can give you a tune that will be OK to use with 91 octane. If you are worried about warranty issues, Get a second ECU, put the Wester's tune on it, and swap it out if you have problems. It's realatively easy.

Like lil goat, I have been with Lyndon since the begining (begining of Solstice tunes anyway) and have not had any problems. I wouldn't dream of going back to my regular tune...

Hope this helps.

Mike

Quote from: MGar on January 19, 2009, 04:50:27 AM

The following should be noted.
I'm having issues with 91 octane, and the GM tune.
I am not the only one. So far, the only thing that seems to be in common between myself and the others that have noted the same issue, is that we both have the GMPP CAI.

However, if I run a mix of 100/91 to come out to around 93-94 octane, I have no problems.

Quote from: MGar on January 19, 2009, 04:48:22 PM

The car will cut out, and fall on it's face around 5-5.5K in 3rd & 4th. It will then pick up, and go again, but it's a serious detriment to performance, and longevity, given that it is indeed a knock event as I think it is.

lil goat · « **Reply #80 on:** January 20, 2009, 04:37:09 PM »

Lyndon sets up every tune the way the buyer wants, be it 93, 91, or 89. Just tell him what you want. I also wonder why you would buy a warranty on a car that comes with a 100,000 mile warranty from the factory. The GXP was the 5th car I bought from the same dealer I had bought a warranty on everyone, he told me I didn't need one on the GXP it was covered, and I had one on my NA Solstice, he credited me the money for the warranty on the trade in, so I wonder why your dealer would even sell you one.

MGar · « **Reply #81 on:** January 21, 2009, 03:40:54 AM »

It should also be noted, that I'm hitting 21 on average, and as high as 23 psi. I have not done the wastegate modification on the new one ('08). The modifications that have been done are listed.

Apparently, from what I've read, some people with the GM tune hit 23-24psi, most are sitting around 18psi.

If I had to wager, I'd bet that if I tolerated the cut out over a couple of tanks of gas, that it would stop, and I'd only see 18psi.
Being that the first time it happened, I went out and half filled the tank with 100, I think that threw the ECU off. The next time I encountered a cut out event was after about 4 partial fill ups with no 100 (fill up from 1/2 a tank with straight 91).
After that, I burnt through most of the gas avoiding WOT, and filled up 5.5 gallons 100, and filled the rest on 91, which should end up around 94 octane according to most tables.

I'm also only 177ft above sea level, whereas I believe most (with the GM tune) hitting 23-24psi are much higher in elevation.

spicy3480 · « **Reply #82 on:** January 21, 2009, 09:24:01 AM »

I agree with Go-N Def...and Lyndon does have a tune for 91 octane.

MGar · « **Reply #83 on:** March 02, 2009, 02:34:11 AM »

After quite awhile, even running 93+ (mixing 100) the problem began to re-occur. This told me the problem wasn't octane, despite that resolving the issue for some time.
I went through all the fixes, re-tightened some the grounds (one on the side of the head, the two on the chassis), checked the plugs, etc. Problem ended up being the MAF needing a cleaning from something that had happened when I first put on the GMPP CAI. The prefilter essentially ended up soaked in motor oil. I cleaned it off, but apparently did not do a good enough job. On checking the MAF, it had oil residue. Once cleaned, the problem was resolved, and I can run 91 without issue.

2kwk4u · « **Reply #84 on:** March 02, 2009, 11:43:54 AM »

Quote from: MGar on March 02, 2009, 02:34:11 AM

After quite awhile, even running 93+ (mixing 100) the problem began to re-occur. This told me the problem wasn't octane, despite that resolving the issue for some time.
I went through all the fixes, re-tigthened some the grounds (one on the side of the head, the two on the chassis), checked the plugs, etc. Problem ended up being the MAF needing a cleaning from something that had happened when I first put on the GMPP CAI. The prefilter essentially ended up soaked in motor oil. I cleaned it off, but apparently did not do a good enough job. On checking the MAF, it had oil residue. Once cleaned, the problem was resolved, and I can run 91 without issue.

Good news, man. Thanks for fessin' up to let us all know.

jonymac · « **Reply #85 on:** March 28, 2009, 02:59:13 PM »

Any more news on Lyndon's progress? I have the Westers tune and all the typical air moving upgrades. I LOVE the tune! I peak at 22-23 regularly. Last tune update I got was in September. I may have him adjust my tune from 91 to 93 octane. I live in northern VA - anybody know about octane levels up and down the east coast - couldn't find a website that listed them.

So, I guess the plan would be to wait and see what Lyndon can do with the new sensors and then decide whether to install them and retune - that the way you guys see it?

chuckdoc · « **Reply #86 on:** March 29, 2009, 07:23:49 AM »

Well we were on for testing yesterday but it rained again. We have had rain everytime Joe and I plan on testing. Lets see what happens next weekend.

Critterman · « **Reply #87 on:** March 29, 2009, 02:55:11 PM »

I was great today Chuck you should have headed south

lil goat · « **Reply #88 on:** March 29, 2009, 05:21:52 PM »

Lyndon is STILL buried in snow, he will be doing updates as soon as he can get the GXP out of winter storage, they measure snow up there in feet not inches.

snaponbob · « **Reply #89 on:** March 29, 2009, 05:36:35 PM »

Quote from: lil goat on March 29, 2009, 05:21:52 PM

Lyndon is STILL buried in snow, he will be doing updates as soon as he can get the GXP out of winter storage, they measure snow up there in feet not inches.

Centimeters and meters, eh.

lil goat · « **Reply #90 on:** March 30, 2009, 01:27:11 PM »

right on Bob, sorry eh. Looks like another snow storm is heading his way, maybe kilometers soon eh. I asked Lyndon about being Canadian once, he told me he was just a redneck, works for me, eh.

snaponbob · « **Reply #91 on:** March 30, 2009, 03:42:33 PM »

Quote from: lil goat on March 30, 2009, 01:27:11 PM

right on Bob, sorry eh. Looks like another snow storm is heading his way, maybe kilometers soon eh. I asked Lyndon about being Canadian once, he told me he was just a redneck, works for me, eh.

No way, hoser, eh!!!!

Now, I am trying to get a mental picture of a semi-socialist redneck. Does VW or Volvo make pick up trucks? Hmmmmm, blubber jerky, pot bellied Canadian Mounties in 20 year Blazers with light bars, and dog sleds with CB radios.

baconbits · « **Reply #92 on:** March 30, 2009, 04:09:46 PM »

"I am trying to get a mental picture of a semi-socialist redneck"
I resemble that remark..and so do about 40,000 of the 100,000 people in the town I live in..
Bacon

KWhale · « **Reply #93 on:** March 30, 2009, 06:55:51 PM »

In Alberta, we are just Rednecks, no qualifiers needed. Quietly proud of our Redneckness!

Critterman · « **Reply #94 on:** March 31, 2009, 08:49:03 AM »

Bob, VW used to make a pickup out of the Rabbit, usually a diesel

snaponbob · « **Reply #95 on:** March 31, 2009, 09:28:43 AM »

Quote from: baconbits on March 30, 2009, 04:09:46 PM

"I am trying to get a mental picture of a semi-socialist redneck"
I resemble that remark..and so do about 40,000 of the 100,000 people in the town I live in..
Bacon

Said in jest. I know you guys have some fun at our expense as well. Some of my autocross budies north of the border constantly laugh about us down here complaining about traction on days below 40 degrees F. (Among other things.)

Now, I just MUST ask about the statistics used above. How did you come up with the 40% of your town that you referred to?

baconbits · « **Reply #96 on:** March 31, 2009, 09:43:49 AM »

Come on up and have a look for yourself...

solo40oz · « **Reply #97 on:** September 11, 2009, 12:07:46 AM »

A couple of questions for those of you who have done the GMPP tune:

1) How did this affect your gas mileage?
2) How effective is this tune with stock exhaust and stock air intake?

kwtoxman · « **Reply #98 on:** September 11, 2009, 12:17:35 AM »

I have the GM upgrade tune.

My gas mileage is similar to before. Similar in so much as it depends on how you drive it. The car will "go" more when you get on the gas pedal. But drives similar to stock otherwise. So it depends on your foot (and your restraint).

My car is stock for the powertrain otherwise.

IMO GXP/Redline owners are crazy not to upgrade. It is an impressive difference. If you don't want the issues with an aftermarket tune the GM tune is the way to go. And wow.

DRGNSLR · « **Reply #99 on:** September 11, 2009, 01:59:58 AM »

I'm normally getting anywhere from 23.5 to 24.5 miles per gallon in town and 30+ highway after the tune. That compares to 23 - 23.5/gal city driving and about 28/gal highway prior to the tune install. But as kwtoxman says, the mileage will vary depending on your right foot!

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Author Topic: GMPP Tune for GXP and Redlines (Read 48745 times)

lil goat

lil goat

lil goat