boost install

[Begle1]

or it might only be 1200* at the manifold, which you can run all day long (according to various sources who quote Cummins literature).

Nice...

[swampthang]

oh ok that is a good reason lol my truck is still a non ic so i really need to get a read on the temps i have turned up the fuel ALOT and the boost is up there also so i know it is pushing some heat i will be sure to get the in manifold probe

JC

[swampthang]

just ordered the thermo coupler from isspro i got the adjustable short one i figured that is the one that would fit in the intake manifold the best ??



JC

[SChandler]

Begle1, after reading my post and your reply, I would like to clarify the "sources" I am quoting. I am quoting only what I have seen on forums for max sustained temps as discussed here and elsewhere. I have no special knowledge that would let me say that 1200 is safe all day long, that is just what everyone else seems to think, including those who have access to Cummins info. I don't run more than 1250 sustained (pre-turbo) and that seems to work for me, although I don't do it very often. Your mileage may vary. Swampthang, I have no idea on short versus long probes, I used whichever probe came with my gauge when I ordered it .

[Begle1]

Begle1, after reading my post and your reply, I would like to clarify the "sources" I am quoting. I am quoting only what I have seen on forums for max sustained temps as discussed here and elsewhere.

I figured you might have been sidelong referencing this thread.

I've always heard 1250, and I've seen a Cummins spec sheet somewhere saying that 1250 is the safe max temp. And I've ran for hours at a time at 3000 RPM and 1100-1250 degrees.

I think that 1250 is a safe number, altough it does start smelling funny after half an hour at it.

But there are apparently Cummins sources that say 1050 is the max sustained temperature, which is scary...

[SChandler]

Your thread on this forum is one of the threads I was thinking of when I wrote that reply. I got lazy and didn't site my sources . Sorry about that. I have also seen the 1250 number on the ever popular dodgeram.org website (http://dodgeram.org/tech/dsl/Facts/92specs.html), as well as on (if my memory serves me correctly) TDR, DTR, and CF forums. I read too many forums to keep all of what I got where straight in my head. On the dodgeram.org site, they quote max temps for post-turbo pyro readings as 950* at rated power and 810* at torque peak, but 1250* max for both with an exhaust manifold mounted probe. Interesting isn't it?

[SChandler]

I was on CF earlier reading the tech articles and found one by Paccool where he recorded his own experience with pre- and post-turbo pyro readings. The article is here: http://www.cumminsforum.com/forum/89-93-tech-articles/25484-egts-pre-post-turbo.html. He reported a 350* difference at the high end of the temperature range.

[dpuckett]

I had a nonIC 91, and going up the same hill in the same weather conditions, netted a 400+ deg difference. I could push it hard up the hill, and never top 950. Put the probe in the manifold, and had to back out of it at 1400. Boost was about 3-4psi lower at 1400 than I'd had at the 950 post turbo.

Point is, if you have a hopped up engine like swampthang does (or soon will), put the probe in the manifold.

DP