Fuel pin and governor spring question
 

Hello everybody! Im new to the cummins world, just got my first one, an 89 w250. I live in the mtns and do alot of towing. My truck gets very hot coming over step passes. My question is, if i add more power(Denny T stage II pin and 3200 governor spring) should it pull better with lower EGTs or will the Egts get hotter with the more fuel?

More fuel = more heat.

Governor spring is a good idea. With the higher rpm, you have a chance to move more air; in a lower gear with (i.e. less engine load).

IMO, a bigger turbo would be most helpful. I'd probably pickup a cheap used HX35 and swap over a larger exhaust housing.

Intercooler will help some too.

I was just reading you sig. how do you like your 5x12s?? I have stock injectors right now after a bad exper. with ddps.. but I want alittle more power than the stock ones..:c:

I have the 5x12s because they practically fell in my lap. I haven't tuned everything out yet, but I'll probably need a bigger turbo at that point.

Non-IC injectors can flow a lot of fuel... more than stock IC ones. Enough to max out an HX35 I'm told. Just a matter of turning the fuel screw. However, more fuel = more power = more heat.

In your case, you need more, colder air before you add more fuel. More timing helps. A straight-thru muffler or no muffler will knock down your EGTs a bit also.

How does the bhaf mod compare to a spectre filter? Also is see a couple new hx35's on ebay for around $300. Are they any good?

---AutoMerged DoublePost---

Mine is a non-intercooled aswell, and you said itll max out the hx35?

I have a hx35 with the mods, Hamilton cam, fuel pin 4 inch ex and m&h timing spacer..and water inj. do the 5x12s flow about the same as the non intercooled ones??I flow good cool air and egts are not a prob. now.. its just that this engine with stock intercooler injectors is a turd compared to the non intercooled head and injectors I had before..:c:

---AutoMerged DoublePost---

the hx35s on e bay for 300 is chink crap...buy a old hx35 port it mod. it and rebuild it with genuine holset parts and your golden..:c:

I got my '02 hx35 with boost elbow for free. Drilled a 3/4" hole in the divider. Spools great! Shouldn't cost more than $150-200 or so.

Another option is to get a larger compressor side for the H1C. The exhaust side is relatively open and good for towing.

My bhaf is just a wix filter, no airbox, and a ABS plumbing adapter on the stock rubber intake hose. I prop it up in the fenderwell with an empty gallon oil jug.

that's what I did with my hx35..:c:

Here's some injector sizes in order from small to large:
stock intercooled: 6x.009 = .000380 sq.in.
stock non-intercooled: 4x.013 = .000531 sq.in.
'marine 370': = 5x.012 =.000565 sq.in.
Lucas POD: = 4x.015 = .000707 sq.in.

ya I found that last night also and it helped me... thanks!!! I wish I wouldn't have went with the stock intercooled.. they are a joke as far as power goes compared to the non intercooled ones!! Im def. getting rid of them..:c: