i know you're thinking low temps are good but...

i installed too many mods at the same time (smarty, exhaust manifold, guage) to have a baseline...

cruising EGTs seem normal at 400-850 depending on slight inclines/declines and what not.

max EGTs under hard excelleration going up hill barely breach 1000.

idle is as low as 200 and rarely do i have to wait to shut her down before the temps drop immediatley to 350.

i run smarty on sw3 (stock 48RE) with default settings most of the time. the temps with the smarty removed go up a bit but not a lot.

my question is...

does this seem normal with my mods?? my 99 ramped up temps way quicker and higher than this truck. and i often had to sit and wait for safe temps to shut down.

my concern is...

am i going to clog the cat with these temps or get cylinder wash or deposits on injectors or anything? i know high temps can keep things cleaned out.

thanks, j

 

yes those are too low.
when you installed the pyro, did you ensure that the tip of the probe is in the center of the exhaust stream? if you are too deep and touching the other side of the manifold, or too shallow and up at the top, you will get low readings....

 

a new exhaust manifold will drop you about 200 degree's lower too

 

no, i didn't measure the probe. just stuck it in there. going by memory i'd guess it's in the right area. it was the standard non-adjustable probe that i got with guages from genos garage. i ordered the manifold from them at the same time.

i'll pull the probe out this weekend to see where it's at. i doubt it's touching the other side of the manifold..... if anything i guess too short. the boss on the manifold is pretty thick.

on another angle, i fiddled with the smarty for a bit today and when i run SWs with NO timing, things heat up considerably. SW2 with no timing gets the EGTs up to 1200 pretty easily. still nothing much over that though..... partly due to traffic congestion and i'm getting a trans build on the 11th so i'm trying not too be too hard on the truck to avoid messing up my plans.

can't wait for the trans but i wanna be sure i'm getting good EGT readings prior to romping on it too much.

j

 

200?? i was estimating about 100. if i use 200 to gauge normalcy it puts me back to normal temps?? any one agree?


j

 

Your gauge is a good 100-150* low on the idle end and about 300* low on the upper end. I bet you're hitting at least 1500* max with the Smarty cranked up.

IMO having the probe too low or too high isn't going to change the reading enough to cause the low temps you're seeing. I would call Dipricol and ask what they can do to help. Even if it's out of warranty maybe they can test it for you.

 

You won't see a 200* difference. Maybe 25-50*.

 

poo.... think i'll start by calling genos.

any chance my having the excess EGT wire looped up and tie wraped under the dash causing a volt drop from the probe?

j

 

The extra wire won't make a difference. They calibrate the gauge/probe based on that length of wire.

 

genos says i'm getting normal readings.

thanx for the input folks, j

 

Normal....for a POST-TURBO installation maybe!

 

i hear you.... not sure what i'm going to do about it yet.

j

 

While I agree they are a little low (on the upper end), they are not that low for a Smarty... His Smarty on SW#3 probably won't get over 1100* unless towing... I know I can't get mine over 1100* unless towing.. and I see about the same on cool down... very quick to 350*, in fact I shut down at 300* and hardly have to wait... If its just idling it will get down to 175-225 based on AC and ambient temp.

Maybe thats just the difference in the manifold, the intake horn, and muffler...

As far as the cat I removed mine for a couple reasons, but cooler temps and soot were the main ones.

Go back to stock programing and see what temps you can hit on a long WOT run... then post back.

 

The 04.5+ trucks do not idle at 175*. They also exceed 1100* on the street...with stock or any other aftermarket programming. Towing or not, a full throttle run (with a stock turbo) from 0-80mph will exceed 1100*.

Sounds like your Dipricol gauge has the same problem his does. Knowing how hot most trucks on here run, I personally wouldn't trust it.

I have the aftermarket manifold and a 5" exhaust with a straight flow-through muffler. Those things don't make that much of a difference.

 

My dads 06, with a pricol is the exact same... He should be able to hit 1100 pretty easily when accelerating hard... I find on mine that it gets to 1K pretty easy, then slower to above that... with my engine warm it takes a long time get get down to 175 on the idle, but it will do it... Like if I have been towing and leave it to idle while fueling on a cold day.. its below 200* by the time I get going again... So maybe is 185*, but its below 200*...
But unless I am towing I will not even come close to seeing 1200*.. thou I don't run WOT very often, and certainly to super fast speeds...

I have done some reading... The Smartys run very cool on lower numbers... especially my Jr on SW#1 with no extra fuel... My numbers are the same as everyone else I talk to with a Smarty Jr... so I am confident that I am reading correctly...

Like I said his is a little cool, but not 300-500 like you suggested... maybe 100-200* at most...