Engine/Transmission (1998.5 - 2002) How big of injectors

[Todd F]

I have an 02 HO. I am looking to add as much HP as my stock turbo will feed effectively. Basically I am totally confused now. I had a Comp box but sold it because most people say injectors and just fueling boxes work better. Do I go with a Catcher and small Machs or go with just straight Don Ms. What about a TST or Blue Chip. If it was your truck what would you add.

I tow fairly light loads so that isnt much of an issue. Gauges, clutch and fuel upgrades are being dealt with also

 

[Supermod56]

I have the Catcher/Don's 1. 6 combo, it's AWESOME!!! Sold the fueling box, all it did was make it smoke more, although the Catcher does that pretty good on the bottom end.

Tom

 

[rubberneck]

Ive run dd2's, dd3's, supermentals, Mach4s, and now mach4. 5s. My original DD3's are very nice and i still have them in the garage. The 2s are pretty good, but not as smooth as my 3's. The mentals i had were junk, terrible idle, more smoke, egt's and no noticeable power increase over the 3's. I sold them after 1000 miles. My favorite by far is this new set of 4. 5's. Extremely smooth and nice power delivery all the way through the powerband. It is amazing to me how much a nice set of injectors can change not only the amount of power the truck has, but how well it runs in general. My truck is smoother with the Machs, than with the stock injectors. Now i have not had the stock turbo on this set, but from the way they run, i think it would be a real nice set up on an HO to run them with no box. I think you would have to be mindfull of the pyrometer if towing a good load, but i think they would do a very fine job. With the comp on 5x5 however, no way you could handle near all the fuel. I can get over 1600 pretty quick even with a full size B1. One of my all time favorite towing set ups on my truck was the first set up which was DD3's (100hp) plus and edge EZ, and stock turbo. I would love to try that set up with a 100hp Mach injector. For towing heavy, i do not like heavy fueling boxes like the comp, tst, etc. I Think you would be very happy with the mach 4s and just a boost fooler with nothing else. If you wanted to kick it up a hair more, you could try a catcher or an EZ. The way i see it, if you go big on the injector now, you would be all set up for later on if you decide to upgrade turbos then you could run a heavy box like a tst, blue chips or comp.

 

[Jetpilot]

If you are going to stay with your stock turbo and don't want to watch the egt gauge go with some Mach 1. 6's and an EZ or Catcher. If you will keep an eye on egt's go with the Mach 2. 5's. Some guys are running larger injectors but really OEm turbo will not keep up with the fuel causing smoke and heat. The excessive heat in the 24v tends to cause cracking of the heads... ...



Doug

 

[kelly4463]

I run dd3, comp ,35/40 turbo ,I tow on 1x1, killer combo for towing, but i have a 6sp, If it gets warm i drop down a gear. From what i here don's stick's are top notch and top doller. Next summer Mach 4 will be on my to do list

 

[rubberneck]

The excessive heat in the 24v tends to cause cracking of the heads... ...



Doug

Great, I have definitely seen my share of heat Where do these things tend to crack? I would assume if the head was cracked, there would be a driveablility issue or? I ask, because i saw something interesting on the number 6 fuel crossover tube when installing this last set of injectors. Truck runs great however.

 

[Jetpilot]

The heads tend to crack around the valve seats..... The cracking itself isn't a big deal, cummins allows for some cracking on recon heads. But due to the amount of heat we shock our engines with the cracking can become excessive. Normally there are not any outward symptoms, the cracking is found when a head is removed. Although the cracking can cause a valve seat to come loose and that pretty much makes for a bad day.



Doug

 

[Todd F]

So up to 2. 5s and a Catcher will work OK with the stock turbo. Wouldnt a box be better then a catcher for adjustability reasons. I dont want to be doing things 2 or 3 times. Thats why you people are here... LOL. Down the road a turbo uprade will more than likely be in the plans but not now.

 

[R-N-R]

The heads tend to crack around the valve seats..... The cracking itself isn't a big deal, cummins allows for some cracking on recon heads. But due to the amount of heat we shock our engines with the cracking can become excessive. Normally there are not any outward symptoms, the cracking is found when a head is removed. Although the cracking can cause a valve seat to come loose and that pretty much makes for a bad day.



Doug

I will testify to that! A valve seat in the cylinder can wreak havok on the cylinder wall, piston, head, and if it gets far enough, the turbo itself. Proturbo99 pulled 1/2 a seat out of my turbo, fortunately before it did any damage. The crunched up pieces of valve seat from the #1 cylinder made their way into the #4 cylinder destroying that piston there as well. I can't say that cracking caused my valve seat to break, but it is the most likely cause.

 

[Jetpilot]

Ok here ya go... .



I like the Comp box due to having the adjustability but its too much fuel for your stock turbo unless you are willing to watch the egts. There are many combinations that will work and everyone has their favorite. But for adjustability the Comp is great. You really need to decide how much HP you want and then build the truck to that. Let us know you goals and then we can give good advice and save you some $$.



Doug

 

[Todd F]

I like saving money... hahaha. How much pressure can the head take before you need to stud and Oring it. It is very hard to say how much HP I want but I am thinking 350 to 400 down the road

 

[rubberneck]

Comp box and mild injectors should get you to 350 -400 no problem. I too like the adjustability of the comp box. I have not tried a catcher, so i can not comment on its performance, but i do not like the idea that i can not turn it off. Like has been said, if you dont mind watching the pyro, you could probably go a little bigger than "advised" until you upgrade the hairdryer.

 

[Todd F]

rubberneck dont say that. I just sold a Drag Comp because I was told the HOs dont like timing boxes that well. I figured I would go with the Blue Chip or TST and injectors

 

[BradyWilliams]

All I can say is Hot Rod VP44 and a Super Phat Shaft 64. Great products for 2nd gen.

 

[Supermod56]

The Catcher really helps the drivability, turbo spool-up is better, great set-up for towing, a lot of guys say it's what they should of done from the factory in the first place. I thought about getting stupid with it, but it has enough power now where I can hardly drive it in the rain, don't even want to try it in the snow!!!

Tom

 

[rubberneck]

rubberneck dont say that. I just sold a Drag Comp because I was told the HOs dont like timing boxes that well. I figured I would go with the Blue Chip or TST and injectors

LOL sorry man, just stating the facts. I ran an EZ and TST stack for quite a while. The TST comp box I had made good horsepower, but it was brutal horsepower very on/off. when it was on it was on hard, but it also shut off hard. This could have been because it was the competition version, I never tried a standart PM3, so i cant tell you. Didn't like the way the truck acted with it, so i sold it and bought the comp. As far as the HO not liking timing boxes, they sure wake the truck up. That comment may be related to the fact that headgaskets become a concern when you really crank up the power. Like I said, when i tow, I shut the comp off completely, I like the way the truck sounds/pulls with just the injectors. I do not think you "need" the timing when towing. Many will disagree with me on this, but I did not see the supposed egt reduction the timing offers while towing. When running empty, I run the comp full tilt, and love it. Bottom line is I cant come close to using everything the truck has when towing, cause even if EGT's are kept down, water temps start to edge up on a long hard pull. Now, i really need to step up to twins, cause even with the full size B1, EGT gets hot quick with the new injectors. Cam first, then twins, then water meth, then... it never ends

 

[SnoKing]

The Catcher really helps the drivability, turbo spool-up is better, great set-up for towing, a lot of guys say it's what they should of done from the factory in the first place. I thought about getting stupid with it, but it has enough power now where I can hardly drive it in the rain, don't even want to try it in the snow!!!

Tom

"don't even want to try it in the snow!!!" I think I have made that point several times. I can punch the button on my (EZ mode) Comp in the ice and snow and detune things a bit. SNOKING

 

[DWeiler]

Brett---I'm waiting for my Vp44 to take a dump cause i want that "hotrodVP"but with my luck it will last for a long time before it craps out for the "hotrod" one. Can"t really justify spending the cash replacing a perfectly good pump with an even better one ,i keep telling myself it will be worth it but by wallet is "hangin" on for dear life. With my sig(Catcher,B1-2,mach1. 5etc) and the HRVP things should only get better. If it dies your the one that will be called. -----DW

 

[Todd F]

I think I am leaning towards the Catcher and DD2s or DD3s. Will my EGTs be out of control with a set-up like this

 

[Tiger Rag]

I was going to start my own thread until I saw this one which is very similar to what I was going to start.



I'm looking into injectors. Right now I have an Edge Comp tapped, 4" exhaust, gauges, and a true flow foam filter for the stock air box. The truck is an 01. 5 with a 6 speed and 4. 10 rear end. One of my buddies here in town is about to switch out his Bosch RV 275 injectors to something bigger and I was thinking his old injectors would be pretty decent with the Comp and stock turbo. I can get a decent deal on the injectors. What do you guys think? Anybody running something similar? Will I be sorry I didn't cough up a couple extra $ and buy bigger injectors while I'm changing them out or should I do this for now, then upgrade turbo and injectors again down the road?



Thanks for the help, Matt