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The Story Of A Cummins Suburban (Lots Of Pics)
- Thread starter mosesburb
- Start date
good info, thanks!
No gratuitous truck pictures? 
Nice work (as always).
Nice work (as always).
pretty cool Nick, good info to know and like the way you document your experiement results.
Mine has the HX35W on it now, so I'm hoping I won't have any EGT issues to watch, but I am putting in an EGT gauge just as well!
Mine has the HX35W on it now, so I'm hoping I won't have any EGT issues to watch, but I am putting in an EGT gauge just as well!
So just what EGTs were you running? And what are they now with the new turbo?
DEMON44
Low-Tech Redneck
What fuel mods are done to it now?
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Nice work Nick! The rig is looking better than ever but now I know why the gas sucking big block 8100 pulled way ahead of you on the steep grades in 2012 when we slabbed it from The Hole in The Rock trail in UT rolling into the high country in CO
It was that dern little turbo all along. I thought you were just lagging behind taking pictures
Thanks!!
Don't say that. People will actually believe I know what I'm talking about
good info, thanks!
Thanks
No gratuitous truck pictures?
Nice work (as always).
Thanks!! There are truck PARTS in the pictures...
The pyro is a must have--even on a stocker in my opinion. Your HX35 probably has the 12cm^3 housing on the exhaust side. It can be a restriction which can raise EGTs, but I doubt you'll have a problem (at first, LOL)
I could set the needle on 1150* and it would act like I had a string attaching it to the throttle. Now it will pull at 1000-1050*, but at a higher ground speed.
None since I turned the max power screw once upon a time. I wanted to see if more air/bigger turbo was going to help or not before I did anything. It could use some low boost fueling, but really it runs so well as it is I'm not too antsy to do anything to it right now.
Nice work Nick! The rig is looking better than ever but now I know why the gas sucking big block 8100 pulled way ahead of you on the steep grades in 2012 when we slabbed it from The Hole in The Rock trail in UT rolling into the high country in CO
It was that dern little turbo all along. I thought you were just lagging behind taking pictures
Thanks. I don't recall lagging far behind on that trip, but if you say so
.
DEMON44
Low-Tech Redneck
That's preturbo EGTs right? Your plenty good. You can sustain 1250* for periods of time. You have a charge air cooler in it right? I can't remember now.
Low boost fueling adjustment won't affect overall fueling at all. Just harder fueling under the curve. It's easy on your VE. The set screw in the aneroid diaphragm back it off a couple turns loosens spring tension on the AFC gets your fuel a little quicker.
Low boost fueling adjustment won't affect overall fueling at all. Just harder fueling under the curve. It's easy on your VE. The set screw in the aneroid diaphragm back it off a couple turns loosens spring tension on the AFC gets your fuel a little quicker.
DEMON44
Low-Tech Redneck
Why I'm asking is because a near stock engine shouldn't even be dreaming of EGT issues. Should be able to stand on the throttle and hold the thing at full load rated speed all day long and not even thing about looking at the EGTs
Pre-turbo. Yes on the CAC. 1150* was what I found on the early non-I/C motors. The p-pumps and later were 1250*. Not arguing, just relating what I found back in the days of research.
I know it won't affect total fueling, just not really feeling like messing with it at the moment.
That's what I thought, but it sure doesn't seem to be the case with this one. The new turbo helped a bunch though. Maybe a PO of the motor did something very covertly?? The pump appears to be original and I broke most of the screws loose for the first time since I've had it.
What he said. 1150* is not a problem. Over 1300 sustained is when you should start to worry.
Regardless, the bigger turbo is a nice upgrade.
DEMON44
Low-Tech Redneck
Right the non-ic head is different. Those you worry about cracking the head. Not melting pistons.
DEMON44
Low-Tech Redneck
You would never know if the fuel pin had been turned unless you took it apart and looked at it. Fuel pin is eccentric turning it to the skinny side forward is same as pushing Ppump plate forward.
I've had it apart and it was in the stock location. It was kind of bound/gummed up when I pulled it apart. These pumps are very user friendly.
DEMON44
Low-Tech Redneck
For sure simplicity for the win.
That's perplexing still.
Pressurized your intake for leaks? Isolated the CAC?
That's perplexing still.
Pressurized your intake for leaks? Isolated the CAC?
Nope and nope. Find no blatant external evidence of anything though. No rubbing or rub through. No visible "jets" in the dust that normally covers everything.
DEMON44
Low-Tech Redneck
It'd be something to checkout still. You'd never be able to tell if the cooler is Swiss cheese visually. Unless you burst a side tank weld.
True.
DEMON44
Low-Tech Redneck
I'm coming down to phx 3rd week of nov for my brothers wedding. I could probably slip my tester kit in my bag for you if you wanted to use it. Maybe just mail it back when ever.
