Author Topic: Wester's GMPP Tuning begins (Read 82456 times)

DirtyMike · « **Reply #25 on:** April 09, 2009, 05:08:02 PM »

i really dont want to buy gmpp upgrade!

keep up the good work lyndon!!

Imaj · « **Reply #26 on:** April 09, 2009, 07:32:12 PM »

Awesome news! I too, was hoping we just needed to buy the sensors and use the Westers tune to rock past 300whp. I am looking forward to what comes out of this.

JeffInDFW · « **Reply #27 on:** April 17, 2009, 04:34:24 PM »

??? hello? This thing on??!! I keep coming back here to this thread all excited hoping for an update, expecting to see Lyndon tell us all he has made 700whp with his GMPP updated tune! But since April 9th, nothing new???

Deep-GXP · « **Reply #28 on:** April 17, 2009, 06:45:15 PM »

Im sure he's doing as much as he can

A lot of people are going to jump onto his tune as soon as he tweaks everything and releases his new tune

lil goat · « **Reply #29 on:** April 17, 2009, 08:00:34 PM »

I am not sure what I will be getting but I am getting a new tune tonight, I am pulling my cat tomorrow and going with a downtube no cat. Lyndon is giving me a tune for that, not sure if other stuff will be included or not. The last I heard he did not expect to have a new tune ready until the end of the month.

spicy3480 · « **Reply #30 on:** April 17, 2009, 08:20:12 PM »

Lyndon told me he has something good in the works...I might be seeing a test tune soon also for the automatics.

jonymac · « **Reply #31 on:** April 17, 2009, 08:25:15 PM »

Waiting patiently-ish!!!

Filipp · « **Reply #32 on:** April 17, 2009, 09:08:32 PM »

Quote from: spiky3480 on April 17, 2009, 08:20:12 PM

Lyndon told me he has something good in the works...I might be seeing a test tune soon also for the automatics.

Nice, with your current tune are you also getting 23-25psi with the automatic?

lil goat · « **Reply #33 on:** April 18, 2009, 02:44:23 PM »

Well the downpipe is installed, I haven't heard anything from Lyndon yet. maybe he is taking a well deserved day of. I like the sound of the no cat with the Solo Mach, sounds like a sports car.

DirtyMike · « **Reply #34 on:** April 18, 2009, 02:50:03 PM »

No cat is the best!!

spicy3480 · « **Reply #35 on:** April 18, 2009, 05:19:47 PM »

Quote from: Filipp on April 17, 2009, 09:08:32 PM

Nice, with your current tune are you also getting 23-25psi with the automatic?

Yes 25psi max

chuckdoc · « **Reply #36 on:** April 18, 2009, 08:53:02 PM »

I have a new tune to test for the Westers mod of the GM performance tune, but Joe and Grant and John and I are finishing off a basement. As soon as we are done, I will give the tune a try. I think this coming weekend. I will post as soon as we get a readout from HP tuners on the WOT runs.

kennysabarese · « **Reply #37 on:** April 18, 2009, 11:04:48 PM »

Hey guys, just wanted to check that you have seen this thread by Flash's Owner on Sol forum. It seems that the bar varies with atmospheric conditions.

http://www.solsticeforum.com/forum/f43/boost-levels-atmospheric-conditions-thread-54423/

So I am hitting almost 2.7bar with 23 PSI at near sea level. So to get more PSI, I would need a 3 bar sensor for more boost. But for others who are at higher elevation, it seems they might not need it. Am I off here?

Filipp · « **Reply #38 on:** April 18, 2009, 11:13:58 PM »

Quote from: kennysabarese on April 18, 2009, 11:04:48 PM

Hey guys, just wanted to check that you have seen this thread by Flash's Owner on Sol forum. It seems that the bar varies with atmospheric conditions.

http://www.solsticeforum.com/forum/f43/boost-levels-atmospheric-conditions-thread-54423/

So I am hitting almost 2.7bar with 23 PSI at near sea level. So to get more PSI, I would need a 3 bar sensor for more boost. But for others who are at higher elevation, it seems they might not need it. Am I off here?

You have the GMPP tune so basically 22-23psi is as high as you will see it. The people who are getting 25psi have the Wester's tune.

kennysabarese · « **Reply #39 on:** April 19, 2009, 07:11:36 AM »

Yes I understand that. I will eventually be getting a Wester's tune. But some are saying that they don't think the new sensors are required to get more than 25 PSI. What I'm trying to say is I think that 25psi at sea level would be the max attainable by the 2.7 bar sensors based on the information found by the GM engineer on Sol Forum

DeepBlueGXP · « **Reply #40 on:** April 19, 2009, 07:30:47 AM »

Lil goat, can you get a sound bit of the catless do

Sol Asylum · « **Reply #41 on:** April 19, 2009, 05:26:32 PM »

Quote from: kennysabarese on April 19, 2009, 07:11:36 AM

Yes I understand that. I will eventually be getting a Wester's tune. But some are saying that they don't think the new sensors are required to get more than 25 PSI. What I'm trying to say is I think that 25psi at sea level would be the max attainable by the 2.7 bar sensors based on the information found by the GM engineer on Sol Forum

Boost is going to be relative to atmospheric conditions as well as altitude. Standard conditions at sea level are 59F and 29.92 INHG (14.69 PSI).
2.7 bar=39.16 PSI
3.0 bar=43.51 PSI

The PSI boost that you see on the DIC is PSI over atmospheric so 25 PSI of boost is 25+14.69=39.69 PSI, which is over the 39.16 limit of the 2.7 bar sensor.

At a higher altitude the pressure drops, typically 1000 foot increase is equal to a drop of 1 inch of mercury or .49 PSI. Lets say you go to Denver elevation about 5000 FT above see level so the pressure drop is 5X.49=2.46 PSI standard pressure should be 14.69-2.46=12.23. Assuming 2.7 bar (39.16PSI) is the limit 39.16-12.23=26.93 PSI of boost is the max you should see.

So in theory at a higher altitude you would not need the sensor to see a higher boost. However as you increase your altitude and density of air drops the performance of the car's engine drops with it. So a car at sea level may only get 25PSI of boost but it could still out perform an engine that is at a higher altitude that is making almost 27PSI because the boost is a relative value and not a true value of how much air is being pumped into your engine. There are a lot of other factors that need to be considered such as what is the humidity, or the temperature. This is why most people that have an engine dynoed will give temp, humidity, and altitude when stating HP.

Another thing to consider is that the sensors might be rated to 2.7 bar but it might only be accurate to say 2.5 bar (36.25PSI) which if the normal tune only allows 19PSI of boost 19+14.69=33.69psi well under the threshold for the accuracy of the sensor. Also what happens if you take a sensor that is rated to 2.7 bar and run the pressure to say 3 bar does it damage the sensor of does it just Peg and stop reading? I don't know but its something to think about.

Frank I · « **Reply #42 on:** April 19, 2009, 08:59:05 PM »

Quote from: lil goat on April 18, 2009, 02:44:23 PM

Well the downpipe is installed, I haven't heard anything from Lyndon yet. maybe he is taking a well deserved day of. I like the sound of the no cat with the Solo Mach, sounds like a sports car.

Goat:

Is the downpipe from Solo or??? I'm thinking of doing the same thing since we do not have state inspections here.

Frank I

lil goat · « **Reply #43 on:** April 20, 2009, 08:07:57 AM »

Quote from: Frank I on April 19, 2009, 08:59:05 PM

Goat:

Is the downpipe from Solo or??? I'm thinking of doing the same thing since we do not have state inspections here.

Frank I

Uh well err ahh, I am sworn to secrecy as they don't have it on the website, would you understand if I told you I bought it from a guy named Jeff out of the back of a truck.

Sound clips eventually still no new tune from Canada, it is not as loud as a Street Race even with the stock cat but is has a nice deep growl, seems to be a little rich so I am sure the tone will change with the correct tune.

Technically a 2.7 bar sensor will go to 40 psi in theory, but in real world applictaion 25 is a common limit. The 3.0 will go to 29.5 in a real world senario. If I could see and hold 25 I would be happy, I see 25 on a good day but usually hold in the low 20's.

spicy3480 · « **Reply #44 on:** April 20, 2009, 08:54:25 AM »

Quote from: Frank I on April 19, 2009, 08:59:05 PM

Goat:

Is the downpipe from Solo or??? I'm thinking of doing the same thing since we do not have state inspections here.

Frank I

Frank,
Shoot me a PM and I can take care of your mystery downpipe question there. I work for that mystery company that goat is referring to

Sly Bob · « **Reply #45 on:** April 20, 2009, 10:37:02 AM »

That catless down pipe is for off road only though.

All those down pipes, high flow and otherwise are built at the shop just around the corner from my home.

lil goat · « **Reply #46 on:** April 20, 2009, 12:18:03 PM »

It is not that big a secret I was just having fun as Jeff is hiding from the tree huggers, send a PM to Going Solo to place an order.

lil goat · « **Reply #47 on:** April 20, 2009, 07:49:32 PM »

I got the catless tune from Lyndon, I asked him if there was anything new in it, just got silence and the tune. It is in, just ran around the block in the rain, about all I could do was see boost hit in the 20's very quickly as I was spinning the tires on the wet pavement and going sideways. Needs a few hundred miles to settle in but looks good so far. If anyone local needs a high flow cat let me know.

spicy3480 · « **Reply #48 on:** April 20, 2009, 07:59:56 PM »

Goat,
How much louder is it going from the HF to the catless downpipe? How did it change the sound?

JeffInDFW · « **Reply #49 on:** April 21, 2009, 02:50:09 AM »

I just installed a catless downpipe with O2 extender to see if it will throw a code or not. I am still on the OEM tune (waiting on Westers GMPP plus details before pulling the trigger on a tune!). I know the car will tune out any gains, but anyone think it will cause a problem running no cat on a stock tune (other than the possibility of a Check Engine Light)?

On Solstice forum, a dealer denied a warranty claim for a burned valve (lean condition) because the owner had a Solo exhaust with no muffler. They (and GM) claimed the lack of a muffler caused enough of a drop in back pressure to cause the car to run lean enough to cause the engine failure.

I know the O2 sensor should read it going lean and add more fuel (and therefore more power!), but since our cars run leaner than a normal car with the Direct Injection, do you guys think there is any chance that I could see a problem doing this on the OEM tune? I don't think so, but wanted your opinions. I know Lyndon can tune to gain from the lack of a cat and turn off the CEL, but do you guys think the GMPP tune would be happy with the lack of a cat if my extended O2 sensor can take care of the CEL?

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Author Topic: Wester's GMPP Tuning begins (Read 82456 times)

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