Another HX-35 q

[matthewh]

I'm sure I'm gonna catch siht for this, but one of my rigs came with an extra turbo, an HX-35W. Came from a '69 industrial motor. Assembly #3534919, Serial #c0544100. Good shape, needs the oil line, but shaft has no play.

My Q is, will this turbo offer any benefit on my '93 W350, 5spd, 4.10 gears? 95% is daily driven, but occasionally tow, and usually its heavy, 10-15k.
I've read these turbos can cause heat issues in the higher rpms, especially with more fuel.

Truck is stock, other than the piston lift pump upgrade, and plans for 4in exhaust and bhaf. Other than lag, truck runs and pulls good, just looking for quicker spooling between shifts.

Have no plans for pump tuning or springs or the such, I like my DD to be, dare I say, stock , I'll save that tweaking stuff for the project truck.

Thanks in advance,

[cmann250]

The HX35 would be perfect for you. It will spool quicker and if you leave the fueling stock, EGTs will never be an issue. I wish I had the the disipline you do

[ellis93]

The HX35 would be perfect for you. It will spool quicker and if you leave the fueling stock, EGTs will never be an issue. I wish I had the the disipline you do

He's mostly right,egts will suffer some with a 12cm housing. BTDT with mine,it'll raise temps by (on mine with stock fuel settings) 100° or so. Not really a big deal unless you love the higher side of the RPMs like I do you'll have to watch it,hell our trucks pull best when wound out with those low gears

[cmann250]

He's mostly right,egts will suffer some with a 12cm housing. BTDT with mine,it'll raise temps by (on mine with stock fuel settings) 100° or so. Not really a big deal unless you love the higher side of the RPMs like I do you'll have to watch it,hell our trucks pull best when wound out with those low gears

Does it push the EGTs beyond the 1250* that Cummins rated our engines for at 100% D.C.? A smaller exhaust housing (on the HX35 is this case) is one of my favorite things I've done to this truck. Tip into it barely and it starts to spool, so it feels

[ellis93]

He's mostly right,egts will suffer some with a 12cm housing. BTDT with mine,it'll raise temps by (on mine with stock fuel settings) 100° or so. Not really a big deal unless you love the higher side of the RPMs like I do you'll have to watch it,hell our trucks pull best when wound out with those low gears

Does it push the EGTs beyond the 1250* that Cummins rated our engines for at 100% D.C.? A smaller exhaust housing (on the HX35 is this case) is one of my favorite things I've done to this truck. Tip into it barely and it starts to spool, so it feels

I busted 1300 several times,made me anxious and I'm kinda particular about my truck

I was hauling to much weight.....as usual.....pulled a hill and didn't look till I was almost over

I will tell you this,I bout a set of Tim's cooler tubz right after that and it cooled it back off. I would guess ditching that factory intake plate neck helped

[RCCUMMINS89]

I am a big fan of the 12cm housings on the 1st gens.....

If you leave everything stock on our trucks and add an hx35 or a 12 housing on the stock turbo..... it runs almost exactly like the newer trucks.

[matthewh]

The HX35 would be perfect for you. It will spool quicker and if you leave the fueling stock, EGTs will never be an issue. I wish I had the the disipline you do

Yeah, its hard not to tweak it, especially seeing what other members trucks run, but I dont have alot of knowledge with the VE pumps, and last thing I want to do is mess something up, especially on the DD.

I'll give it a try and see how I like it. All else fails, i'll put the old lagmaster back on

[dunes450r]

The HX35 would be perfect for you. It will spool quicker and if you leave the fueling stock, EGTs will never be an issue. I wish I had the the disipline you do

He's mostly right,egts will suffer some with a 12cm housing. BTDT with mine,it'll raise temps by (on mine with stock fuel settings) 100° or so. Not really a big deal unless you love the higher side of the RPMs like I do you'll have to watch it,hell our trucks pull best when wound out with those low gears

every pickup is a little different, but a friend had a non-ic that he added an intercooler and hx35 too along with 2-3 turns on the screw, and he could pull 10k lbs full fuel with no egt issues.


an hx35 with IC sticks should not have any issues with heat at all IMO. always a good idea to watch your gauges, but non-ic sticks fuel quite a bit harder than IC's.

[matthewh]

So another Q, I assume with stock settings on the injection pump, I will never see 30-35psi from this turbo? If I understand correctly, more fuel means more boost, so at stock settings, I shouldnt be able to spool this to its limits? Just wondered, have been doing more reading, and wondered if I will even use the wastegate, if it is set up near 30psi

[RCCUMMINS89]

Completely stock, no. With a fuel pin and gov spring, still not. If you max the pump with stock factory injectors, fuel pin, and gov spring... that'll put you around 35 psi.

[Remps]

With my HX35 on the 1990 I can't hit 1100 degrees in an 1/8 mile run wot. Making 32 psi with 3 turns left on the fuel screw, grinded pin, full throttle travel. I towed 7K with it once, had no problem staying under 800 towing in third gear 22-2300 rpm at 60 mph on flat roads. Guestimated 210 rwhp.

[matthewh]

Completely stock, no. With a fuel pin and gov spring, still not. If you max the pump with stock factory injectors, fuel pin, and gov spring... that'll put you around 35 psi.

Well as long as I'm not going backwards in some form, i"ll be happy, main idea is faster spooling, seems to move out all right set as it is.

Thanks