Do I need to put a pyrometer on my 2003 2500HD D/A if I run a Hypertech III on stage 3 setting ? HP setting is +96 and only 163FT LBS of torque. This seems like a pretty mild upgrade compared to some of these mods I see in hear. I really don't want to butcher my LT by adding a bunch of guages. The Max I will probably do with this vehicle is pull a 5400lbs camp trailer through the mountains in Idaho. Can I get any help on this one...........................Thanks

I would recommend adding gauges for any power upgrade. And even if you add guages, you might not want to tow in stage 3 with a stock tranny (Hypertech will also tell you this).


I pull a 7K boat with Edge level 1 (40 HP, ~150FT lbs) and I've seen 1200 EGT going up a steep hill. And from what I've heard Edge manages EGTs much better than Hypertech.

If you're running stock intake and exhaust you definitely don't want to tow with the HPIII on the 90HP setting. And since the HPIII doesn't integrate with a pyro you are on your own to back down the throttle when the EGT's rise. I would definitely get a pyro.

I had that tuner on my 03 before the quad, it is pretty mild, going up a pretty steep grade that required 10 psi just to maintain speed, flooring it up the hillin top gear would not get over 1100 degrees before the truck would hit the speed limiter, unloaded I found it impossible to get over 1100, the quad is a different story...haha, this is also with a max elevation of about 700 feet, I have no idea what idahos is, but the higher you go the higher your EGTs climb. I wish I had a pyro when I was running through the desert mountains of east texas and arizona.

i just finshed mine, I felt the same way about additional gauges, so chose this location.


http://www.dieselplace.com/forum/uploads/ZA8_Pyro.jpg

http://dieselplace.com/forum/smileys/Big%20Smile.gifThanks for all the info and ideas....I called Hypertech and they said what happens when your EGTs get to high under load, it will give you a check engine light. At this time you are suppose to let out of the throttle and give the truck time to recover(cool down). You should then take the Hypertech box down the the next lower setting and try that. If you get the same result, you should put it on the lowest setting. That is why they created the three settings to accommodate for variance in altitudes, loads, and driving conditions. They said they do all of their testing on a dyno at sea level without a loadhttp://dieselplace.com/forum/smileys/Ermm.gif. I ran into a couple of old-timers up in the Sawtooth mountains (altitude around 9000+)with 2500HD D/As pulling monster 10K+ trailers that were using the hypertech, and they loved them. After seeing that I will play it a little cautious by starting out with the 50HP setting with 94FTLBs torque setting (Stage #1) and work up from there. Does anybody know the max EGT temp which triggers the check engine light??? I would hate for it to be too late after I finally seen one........Thanks again for everyones help...Terry

Wickedsprint sounds like you are saying the Quad has much higher egts than the Hypertech. I plan to get a programer but leave it in the lowest setting to tow my 12K 5ver. Would the Hypertech give me lower egts than the quad on the lowest settings?

gman915,


Where is the oem pyrometer that Hypertech is refering to that triggers the check engine light? Most likely on the turbo, is my guess.


It is my understanding that you would be better off monitoring egt with a pyro installed in the exhaust gas stream, then you can back off, before the turbo gets hot enough to trigger a check engine light.

yes because the hypertech is a no-guts chip anyway.....bout the only thing its good for is removin the speed limiter

GMAN wrote: "I called Hypertech and they said what happens when your EGTs get to high under load, it will give you a check engine light. At this time you are suppose to let out of the throttle and give the truck time to recover(cool down)."


Thats a pretty poor answer from Hypertech. Don't believe them for one minute! I don't believe you will get any warning if your EGT's are too high (I would certainly not wait for the SES light to come on -- its too late at that point). If EGT's are too high for an extended period of time, you will damage the motorhttp://www.dieselplace.com/forum/smileys/Cry.gif. That is the reason the Juice/Attitude combo has an integrated pyro / fueling table. EGT's get too high, fueling is backed off. Like Fred G says above, you are on your own to control the EGT's. You need an EGT meter when towing large loads with these boxes. Be careful!!Edited by: OC_DMAX

Hey I wouldn't use Hypertech anymore. Friend of mine that works for a GM dealer said that they are suing hypertech for a mil. cause they boost the injector pump pressure too much. Just my 2 cents.

1250 is the beginning of the red line on my pre-turbo EGT gauge. I can get it there easily on the 60 HP setting in 5th gear on the long hills. I slow down a little and force a down shift to 4th. It doesn't take long to cool it down. Later! Frank

The hypertech definitely has "guts" on the 96 hp setting, just not quite as much as the quad on the 110, the quad 110 runs abut 100-200 degrees hotter for any given rpm at WOT, cruising they are obviously pretty much the same. The hypertech was ALOT more driveable with the 6 speed than the newest quad tune...it surges at about 1500 and in the first two useable gears even at like 5-10 percent throttle to the point that it upsets my ability to drive without giving my passenger whiplash, so I just shortshift it below about 1200 until I get to 4th. Even with the quad 110 I am doing 100 mph before I get over 1200 degrees, ahh the joys of having a light truck at roughly sea level..LOL

yes because the hypertech is a no-guts chip anyway.....bout the only thing its good for is removin the speed limiter





The hypertech does NOT remove the speed limiter, you have it confused with the superchips.