[HUMMERcustoms.com/TAZ]

I in know way mean for anyone to do to thier rig what I do to mine. I am just sharing my experience with tuners as I have been using them a long time especially Hypertech. With warning out of the way i will tell You that Hypertech people, a great group, I have visited with them several times as I live around 1 hour 30 minutes away from headquaters in Memphis. Tells You what they have to so they are protected agianst legal action over thier product. They are not going to tell You what I'm sharing as My experience. But, they are engineers and they understand exactly what I'm going to say here and most likely do it themselves. Colder air and engine temp prevents ping which is early ignition of fuel mixture. In My 99 Silverado since Feb. 1999 I have run 93 oct. setting on 87 oct. fuel and the performance is unreal compared to the 87 oct. setting. I get no ping as I run 160 degree t-stat and cold air intake. I also run dual electric fans but only for last 1 1/2 years. If I keep it as cool as I can running the higher setting works fine for Me. The most important thing to change is the t-stat to 160 degree. I have had a programer for My 2005 H2 for 2 months and have been experimenting with it and I have all the cooling i can get at this time and I have been running 93 setting with 87 oct. fuel and runs like a scawlded dog, cannot wait till I get Magnacharger on. I mentioned in another post the rating you see on pump is a minimum that fuel processor must meet if the state stops and draws a sample to see if they are cheating. My friend in Houston who is a chemical engineer for oil co. says that the pump is usually pumping higher oct. so that it last longer in transport system (read label on pump sticker oct. notice). Oct. degrades as it sets unused. He said most turn fuel over so quick that most of the time You are getting a lot higher oct. than pump says.
That said I will have 160 degree t-stat in this week from Lingenfelter as they are the only one who has it for 2005 H2. I talked to Hypertech and they will not have one as the 05 H2 Gm service people tells them it should not have 160. This was told to me this morning. If this is so why is Lingenfelter willing to sell one or do a complete SC install and then warranty it. This off the wall stuff you have to learn yourself or from someone else who likes going fast and surprising people with speed of 7000lb rig so much that they will try what ever they have to. You know who I'm talking about Ken. I may not have the full deal from Lingenfelter but i got a piece of the technology. If Magnacharger will not help enough of line My performance shop is already drawing up a plan to instal nitrous to be used early until around 2500 rpm when the charger will do the rest from there. I just can't help it I have to feel like I've got to make sure I can go fast but at least have a chance to go faster than the other guy.
Good luck with Your trials with programer.

TAZ (Rick)