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Discussion Starter #1 (Edited)
I got a new powermax on and I like it. It sounds good runs good. Obviously its a little laggy but what do you expect with stock injectors.

Here is my question though; Are my EGTs high???
When i cruise on the highway i see around 750-850 which I can handle but when I hook up to my mud truck (just an old blazer/18ft bumper pull) and switch to a tow tune I see 1,100+ pretty constant.
Is 1,100+ degrees to high on a regular basis while towing???
Would bigger injectors lower my EGT's at all???
I was surprised to see high numbers like that.
Would regearing my truck for the 37"s lower my temps at all???
Any ideas or things to try would be great.
 

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Did you get your tunes updated?
That helped my EGT's and lag.
I also got my FICM tuned from PHP which helped with lag and mpg,s.
 

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Who's tunes are you using? You need updated tunes for the new snail. Laggy is not a word I hear commonly associated with a powermax, it's not really a big turbo at all, pretty close to stock.

If anything, your 37's are what's causing your higher EGT's.

How much weight are you towing?

I would start with new tunes before anything else.
 

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x3 on updating tunes. Mine was VERY laggy with stock tunes (or my old custom tunes) and would fall out of it's efficiency range and start surging. Get the new tunes.
 

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I got my tunes from Matt at Gearhead.
His tunes are great, I use his SRL tune as my DD.
 

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Discussion Starter #6
I have new tunes.(IDP-tow,race,street, Gearhead-SRL+,8K tow, unlimited tow)
I have brand new tunes from Matt and Eric. I have three tunes from each written for the powermax. I have not towed with Matt's tune yet though. The hotter temp were in Eric's tow tune. I also told them about the bigger tires/stock gears and everything else. I've worked with these guys before on tunes. I also know with Matt's tune he tells you to set the revs per mile which I have done.

I will say running the SRL+ was not as laggy as the X-race tune. So I'll have to try towing with Matt's unlimited tow tune and check the temps.

If I was not in tow haul in the tow tune my truck would shift into over drive and it would get real laggy and high EGT temps unless I got it up to about 75. If it stayed in 4th gear though I didn't have any problems with temps(1,000 Degrees or so) just high revs/poor economy.

My guess on the trailer weight would be about 5K total. 18ft road warrior and a 77 k5 reg cab flat bed.
 

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I tow with Matts 8K tow tune and it is fine.
That is with a truck that weighs 12K and a 10K dump trailer, 22K GCVW.
 

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i had the same experience as you except stock 285 tires. With matts 8k tow tune and pulling prolly over 10k my egts would be around 1200-1300 going up a hill of course. I went threw several race tunes with matt and eric and couldnt get it from smoking. Mine would haz going up a hill empty. I took the turbo off and put my 03 back on. Much happier now

If you wanna keep the turbo maybe look into a batmowheel. I just put one on my 03
 

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Discussion Starter #9
i had the same experience as you except stock 285 tires. With matts 8k tow tune and pulling prolly over 10k my egts would be around 1200-1300 going up a hill of course. I went threw several race tunes with matt and eric and couldnt get it from smoking. Mine would haz going up a hill empty. I took the turbo off and put my 03 back on. Much happier now

If you wanna keep the turbo maybe look into a batmowheel. I just put one on my 03
Yeah thats kind of what I was thinking. Batmowheel might be worth a shot. I'll have to see how Matt's tow tune is. His SRL is allot better then the other tunes I have so we'll see what the verdict is when I tow my truck again.
 

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For my experience I share the same EGT findings as Buzzy. Temps were high and bumped 1200* on hills towing. I got the GOGO Stage 1 manifold installed with studs which helped the turbo lag TONS, EGTs are much easier to control hitting maybe 1000* on the hills. I still need to switch tuning around but it's all working good so far. I still haven't towed the boat with the new setup.
 

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Discussion Starter #11
For my experience I share the same EGT findings as Buzzy. Temps were high and bumped 1200* on hills towing. I got the GOGO Stage 1 manifold installed with studs which helped the turbo lag TONS, EGTs are much easier to control hitting maybe 1000* on the hills. I still need to switch tuning around but it's all working good so far. I still haven't towed the boat with the new setup.
Are you running stock injectors?
The manifolds helped out quiet a bit?
 

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I'm referring to the intake manifold modified by GOGO Diesel. Before the PowerMax the truck ran great no issues OEM lag with SCT custom tune. I dropped in the PowerMax with good results with no changes in tuning. There was still some lag but I would say it was just a tad better over stock. By far the biggest issue was the TQ lockup would bog down the PowerMax. So as I would head up a hill I would tap the brake pedal while accelerating to get the motor into a better RPM range. Adding the GOGO manifold helped this problem and added a TON of flow to the motor. It flat out hauls when on the pedal. At 50% pedal it will boost 25 PSI easily with EGTs easily controllable.

Yes, still using stock sticks with 175K+ on them.
 

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With the Ex loaded up with kids, dogs and luggage plus pulling 10k. 1100-1000 was a normal # to see while cruising with matt's 8k tow. I never saw over 1300 pulling some pretty hefty grades but I let it kick down on the big pulls and just watched my oil and coolant temps. The only time I see over 1300 is when I am running Looney or SRL+ and even then it takes some work to get the Insight to alarm at 1401.
I think your 37's are some of the problem, if you do lots of pulling think about a re-gear or downsize tires for pulling.
 

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definitely re-gear. It will not only help with your temps but will also help with your mpg and help with any lagging because of your tires. i regeared for my 37s and it was the best decision ive ever made.
 
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