low power on 93

[JRussell3176]

Your max boost does seem a little low, but not way off. I think I only had around 22psi of max boost with the AFC tweaked and fuel screw against the lock collar. With that setup I was only hitting a max EGT of 1250*. Sounds very similar to your figures (I'm at 4500-5k feet).



Turning that fuel screw in another turn or two will really make the big difference in power... and EGT's. The single best mod I've done to reduce EGT's was the HTT Stage III hybrid compressor upgrade. I saw a max EGT reduction of 200* and was able to crank the fuel screw in another turn and still max out under 1400*. For comparisons sake, I saw no max EGT reduction at all when changing from a hacked stock exhaust to a full 4" turbo-back exhaust. Water/meth was good for about 100* drop (maybe even closer to 200*) AND insane power too!

 

[MMiller]

Reading your post over on the Pirate, I'm thinking you better get the pump timing checked too. Don't know if I missed it on here, but it sounds like it was advanced a bunch before.



Michael

 

[ARhine]

Reading your post over on the Pirate, I'm thinking you better get the pump timing checked too. Don't know if I missed it on here, but it sounds like it was advanced a bunch before.



Michael

I bought a dial indicator tool. Have been trying to round up an extra hand some weekend and borrow a valve spring compressor to check TDC.

 

[ARhine]

Just got off the phone with HT Turbo, said they could fix me up for $820 exchange. Sounds like alot of money to me, but I guess you gotta pay to play.

Upgrade to a 56mm compressor and 14 or 16mm exhuast housing.



Could do it for $450 just putting those parts on my turbo, but with 220K miles I think it could use a rebuild.



Got my dads 90 out lastnight. My truck is definately more spunky than it is. It has the 3. 07 gear ratio with a TF727 though and a heavy bale bed.

 

[JRussell3176]

Just got off the phone with HT Turbo, said they could fix me up for $820 exchange. Sounds like alot of money to me, but I guess you gotta pay to play.

Upgrade to a 56mm compressor and 14 or 16mm exhuast housing.



Could do it for $450 just putting those parts on my turbo, but with 220K miles I think it could use a rebuild.



Got my dads 90 out lastnight. My truck is definately more spunky than it is. It has the 3. 07 gear ratio with a TF727 though and a heavy bale bed.

For the same price you might want to go with the 60mm compressor wheel (Stage III or IV). I've found I have plenty of fuel for the Stage III 60mm with just turning up the pump (stock injectors).

 

[Greenleaf]

I picked up a new PDR HX-35 w/58mm wheel and was not that much. Besides that I was over fueling it and had the turbo modified by HTT with the 60/Stage III hi-flow which still isn't enough turbo if I play hard.



GL

 

[ARhine]

I don't know how far I want to go. I don't want a finicky rig I constantly have to tweak on. I need to be able to hop in it and pull my jeep on a 2000 mile round trip and not have to worry about it.

 

[JRussell3176]

I don't know how far I want to go. I don't want a finicky rig I constantly have to tweak on. I need to be able to hop in it and pull my jeep on a 2000 mile round trip and not have to worry about it.

If you're referring to the Stage III/IV 60mm wheel, that will make no difference in how finicky or hard to tune the truck is. IMHO I just don't see the point in upgrading to only a 58mm wheel when the 60mm is the same price. You should have plenty of fuel even with stock injectors for the 60mm wheel. The last thing you want to do is regret getting the smaller wheel if/when you still have high EGT's with it. :{ :-laf

 

[ARhine]

Ok.



Is this gonna put me into the "Pull cable Club"?

Gotta wonder what the stock clutch and the getrag will think of the extra power.

The guy at HTT talked about not wanting to run it to lean with the larger wheels?



BTW: What should I set my timing to. Through some searching it looks like 1. 4 or 1. 5mm? Several posts were saying you don't want to push the timing near as far on a rig that is used for towing.

 

[Greenleaf]

Bump it up to where it sounds right. If you go too far it will have a rattle to it at slow idle speed. Back it down to be safe. Towing puts an extra load on the engine with the duration of increased boost and timing advance. Hard on the cyliner head gasket.



Setting up timing will serve to lower the EGT a tad. If you go too far I think it may reverse the benefit(?)



Then again the pump will only turn so far becasue the head gets in the way of the top of the AFC.

 

[ARhine]

When I got mine it sounded like my dads 24v on a cold morning, you heard it all the time down the highway as well. I backed it off about 1/16" and it is much more tolerable now. Still hurts my ears a bit if I am under the hood and holding the rpms up some.



I just kinda set it by ear. It is rattlier than the old stock 90, but quieter than the 24v.

 

[ARhine]

Could I stick with my 18. 5 housing for now and just swap out a compressor wheel and see how I like it? So the 60mm wheel would be the way to go I guess?



Just that I have read allot of posts where those going from the 18. 5 to the 16 notice almost no difference?

 

[Greenleaf]

IMHO I don't think it would be worth it but you'd have to try one for yourself to judge.



I like the 21 best but do have the 18. 5 on the other truck. I ran a 16 for some time because I too was told it was the wave of the future. Now it's a door stop and a good one to boot

 

[ARhine]

did you mean 12 or 21cm? I thought nobody liked the 21s?

 

[dpuckett]

Yeah, I'm confused myself. I figured a 21 would be WAYY too laggy. But then again, Scott has one of the most overfuelled trucks here, so maybe that is why he runs the 21-high end flow. You got that with a 21 for sure.



I dont think he meant 12- it is too restrictive with stock injectors and 150% fuelling- not to mention what he has. BTDT. Of course, I didnt have the gate hooked up, but I'd still top 30psi in 2nd gear.



Daniel

 

[Greenleaf]

Twenty-One

Twenty-One

Twenty-One

Twenty-One

Twenty-One

Twenty-One

Twenty-One

 

[btoscano]

Did you ever fine a problem with your injection pump? For the past 2000 miles mine had been having wierd bouts of low power and finally gave up yesterday dumping fuel out the #2 injector line. I pulled the pump and will take it to the diesel shop and see what they say. They guessed springs over the phone.



Brian

 

[ARhine]

no, just don't drive the truck much anymore. Only leaves the shed when I need to pull the jeep to go offroading. Maybe 150 miles a month for the past 4 months.



Bothers me less that way! lol.

 

[btoscano]

I wish I could do that but I've got a Kubota I'd like to get out to my property and some furniture to move! I'm changing a front wheel bearing in my Jeep after work.



Brian