STS Turbo Questions/Issues

[Justin Folkers]

Hi guys,

I just had the STS Turbo Charger system installed on my 2004 H2. I am using the Diablo Predator programmer, but Diablo/STS did not preload the programmer with the program I needed, but rather emailed me 3 versions of the program to try. I ran all 3 programs and it is really fun above 30mph, but below that speed it is a dog. I keep getting the MAP sensor light on the dash too. I reset it, but it comes back a couple days later.

Do you guys have any advice for me? Does anyone have this setup and can they email me the program they are using? The shop I used for the install has tried to help, but this is not their area of expertise and they are getting slow response from STS.

Thanks in advance.

[Justin Folkers]

Hi guys,

I just had the STS Turbo Charger system installed on my 2004 H2. I am using the Diablo Predator programmer, but Diablo/STS did not preload the programmer with the program I needed, but rather emailed me 3 versions of the program to try. I ran all 3 programs and it is really fun above 30mph, but below that speed it is a dog. I keep getting the MAP sensor light on the dash too. I reset it, but it comes back a couple days later.

Do you guys have any advice for me? Does anyone have this setup and can they email me the program they are using? The shop I used for the install has tried to help, but this is not their area of expertise and they are getting slow response from STS.

Thanks in advance.

[Fastest H-Town Realtor]

Congrats on the turbo...Any "Tune inna box" is about enough to get you to a good shop to do a dyno-tune. Nothing more. Houston has at least 3 great LS-1/GM 6.0L tuners. Try one. The low speed issue may be the fact that it takes a turbo a few seconds to spool up. My opinion is that it takes the STS unit a little longer than a normal setup to spool because of the distance from header-turbo-intake. A search on that topic is a must read. The thrown light could be a multitude of simple items.My guess is that the MAF signal is out spec. The dyno-tune would fix the light and may add a few ponies down low.

[rocketw19]

i agree its slow at first due to turbo lag. gotta get the rpms going before the turbo kicks in.

[Justin Folkers]

Thanks for the information guys. I had planned on getting it dyno'd and was told they could tune the wastegate to get some more HP. At least the dyno figures will confirm that it is or isn't performing properly. Did you guys do anything to your tranny? I want to change the shift points using the handheld once I get it stabilized. It just seems to be very sluggish when shifting from 2nd to 3rd.

Very happy I found a group of H2 guys that know what they are talking about.

[Dan]

"Are you a pothead Folker?"

[Justin Folkers]

Funny man! Maybe....maybe not!

[HUMMERcustoms.com/TAZ]

If You mess with changing wastegate springs and a few other things then You will void warranty.

STS is trying to get a more flexible programer for the average install. We just did an STS in a 2004 H2 and We used the Predator and They sent Us one file But, We did not need it. The tuner made this rig run like crazy and We still have it a little rich to let the guy drive it and get turbo bearings broke in and as He drove it each day His spooling got faster and at lower RPM's He is spooling at around 2600 RPM now and We are going to put headers on it to build more and quicker spool and RPM lower. STS has a rig that spools at 1800rpm. The lag in the rig We installed is about 1/2 second. The problem is it needs to spool at lower rpm. That will happen when We put a long kneck set of headers to drop spoolup on down to around 1800 to 2100 rpm with a larger volume of exhaust.
It may not work for most but I would be confident to say it will.

We will have Our AWD dyno in around the end of the month or a little later in FEB. 06 and We can read 1000hp per axle and up to 185mph to 200mph. When We get Him back in We will do some testing and if it is helpful We will send it in to STS. The STS will take up to a week for the turbo bearings to run in and free up the wheel more each day.

I hope it helps but, it would not be a bad idea to put it on a AWD dyno and let them try some variation on the tune. We had Our customer to leave it with Us over the Weekend so We could drive it a little. That is how WE figured out the turbo would spool up faster as We drove it more. When He picked it up on Monday it was running real sweet and quite quick and will get better for Him.

Hope it helps some and We will be doing a Firebird soon and get a little more knowledge each time and will most likely add one to My 1999 Silverado once I run it on dyno and see what the things I have done shows.
We took on Magnuson also so that We can install and compare. We are expecting certain engines will respond better to one kit versus the other and will make the hp boost over the other.

Well hopes it helps and can visit more if You need a little more help.

TAZ

[Justin Folkers]

Wow! It sounds like your setup is doing much better than mine. I got three different programs from Rick at STS and tried each of them again this weekend and adjusted shift firmness, quickness, axle ratio, etc. Still am not getting JACK for performance off the line. My Predator Diablo programmer didn't come with a program that would run the Hummer though. You could start it and it was extremely rich and sounded like it had a radical cam. Do you have the tune file you used accessible to where you could email it to me? Or did you just modify the tune delivered with the Predator. The shop that installed mine said the previous H2 they did with the same kit came with an STS program already installed, but mine didn't. It is getting very frustrating at this point and the shop that did the work is related to the family. Stuck between a rock and a hard place.

[KenP]

Here's about 6 pages of stuff that may help you.

Of course, you could always have Taz fix you right up.

[Justin Folkers]

Wowzer that is a lot of information! The install looks the same as my rig and I had the bigger injectors installed. I really think I got a bad set of programs from STS. Hopefully the authorized dealer, that my guy got the kit from and who has the dyno, will be able to figure out what the problem is. I will definitely give you guys an update. Thanks again for all the help.

[B]

One of the sigle best mods you can do, especially with the turbo is a higher stall.
We did a Silverado SS with a TCI 3000 and it has a wicked launch.

[KenP]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by B:
One of the sigle best mods you can do, especially with the turbo is a higher stall.
We did a Silverado SS with a TCI 3000 and it has a wicked launch. </div></BLOCKQUOTE>Our old truck, while SC'd, had a 2800 stall and that baby would JUMP out of the hole. It was still mild on the street and we didn't seem to suffer offroad any. Until we blew up parts of the t-case...

[HUMMERcustoms.com/TAZ]

Hi Ken
We'll try and help Him all We can. We just played around with the tune that came in the predator. I do not know if Ours was newer than yours. We did not even Use the tune that got sent to Us. We would not be able to really tune with ours and also the tune We used most likely it would not work even though they are same rigs because Your heads could have someting as oddball as less bore on them and the one We are dealing with got bored and little more and polished. You cannot apply one tune to another to simply, You can but, I don not like. I went and got a wideband setup so I do not have to use a hand held. With the PC tuning You actually save Your tune and see if it improved if not You pull it back up and run the rig change. The first thing You can try is leaning it out a little more put do it with wideband sensor on a dyno. I have 2 other guys that tune more than I do. We just kept tinkering with it and ended up decent but was able to leave it more rich than We had hoped. A good thing.
The thing I would do if You did not want to add headers which will cause You to spool up allot quicker. But, the advice about the stall speed converter will give You the fast spool but, if You do not want to go into tranny all that I would make sure I put long neck headers on. I would go to a tuning program like HPTUNERS. They got the deal to do the tunes for Magnuson through superchips. Also You could give Allen at Nelson Performance.com a call tell Him Rick sent You as He use to provide the only tune for STS but they decided to go with an hand held so it would be more flexible by having several tunes. I'd tell Allen My problems. I would get more low end pull with long necks than the shorties. I have not looked hard But. We have been pulling a big order for a guy and dynatech is the only long neck We can still find. Have not really looked We just like the Dynatech. I heard one of the other regular header makers is going to go back into building the long neck. I think some are finding out that there are more than Hummers that need the long tube if they are wanting help with low end and right now dynatech seems to have the market to themselves. I run the complete header catback set up and I really like the setup I got. We changed things there also to help but, There only reason We are going to slowly work on speed as there is to be a fastest hummer challenge this summer so I will be running methanol injection with SC and ice buck. We will have possible different heads and nitrous for 2 short stages if it is needed to get up to where We may need to be. But, back to Your situation go back on the dyno and then add headers and do not worry about catback in Your situation as it will not help alot I have been told but, I disagree with. catback with it and then go back and run it again on dyno. You will see it on the dyno.
In fact if anyone wants to see a little more about how there rig is running is by the new G-Tech Pro SS model. It is like haveing a dynno. It will plug into Your computer and You will print out a graph of 1/4 mile 0 to 60 anything. G-tech Pro told Me it is the main unit being used by Nascar rather than buying the $10,000 autometer I think is how it is pronouced He told Me use it it will be within 1/3 of HP of a dyno if You run the test proparly by direction. Equal number of runs into wind and with the wind. But You can read about it most anywhere. BUt, get the one that prints the SS not the RS model.

TAZ