Engine/Transmission (1998.5 - 2002) Mach 4s are wicked!

[16919]

Just a heads up, I found the M4's + Smarty really smokey, but I am also running 285's and twins. I had to drive around the smoke continuesly. By just running the M4's (delete the Smarty) they run almost smoke free. Just a grey haze when I get on it.



Jim

Was that on a particular setting or all of them? I am running the smarty on 2... mainly because WE were never given a flippin stock sw that would let you adjust for tire size... but I wont go down the smarty bashing road. Its a good product just horrible support on all those updates we never got... so I am left running it on 2.

 

[PRout]

including running stock ecm software? But keep the boost fooler of course. Thanks.

Thats helpful, thanks. . But I'd really like to know how it would run if there were no mods except boost fooler/wastegate elbow, 4 inch exhaust, good air intake, good clutch, good lift pump. - Thats all. .

Almost no electronics or programming, just simple & sweet.

 

[MCharlebois]

i ran with the box off almost all winter and the 4s have plenty of kick all buy themselves ... . with the stock turbo you will have instant responce ,i do not tow very heavy but i can tow with the box om 2x5 and still keep egt in check,about 1200 6k pound camper i would not hesitate to go big on injectors!!!

marcel



imo ... without a box you will not get all the power out of the 4s... with the drag comp HANG ON!!!!!!!!!!!

 

[NoSeeUm]

How would these injectors work on a STOCK H. O. engine? I assume they add 150 hp. What else would i "HAVE TO " have..... besides gauges of course. The only thing i've done to mine is remove the converter/muffler.

PM HOHN, he hangs out over on DTR these days.



I know he smoked his clutch not long after they were installed.



Jim

 

[NoSeeUm]

Was that on a particular setting or all of them? I am running the smarty on 2... mainly because WE were never given a flippin stock sw that would let you adjust for tire size... but I wont go down the smarty bashing road. Its a good product just horrible support on all those updates we never got... so I am left running it on 2.

It smoked on all fueling settings. The even numbers were worse. I forget the number, but except 1/2 power and mileage timing only did not smoke much.



Jim

 

[NoSeeUm]

Thats helpful, thanks. . But I'd really like to know how it would run if there were no mods except boost fooler/wastegate elbow, 4 inch exhaust, good air intake, good clutch, good lift pump. - Thats all. .



Almost no electronics or programming, just simple & sweet.

The upside is you will love them. I can almost say that with total certainty!



The downside is your EGT's will likely be an issue so you would need more air as well to make them 100% driveable under all engine conditions. Keep in mind you can never turn injectors off. #@$%!



The nice thing about the Smarty, is that it also does boost fooling.



You should PM HOHN as well.



Jim

 

[Excessive Force]

PM HOHN, he hangs out over on DTR these days.



I know he smoked his clutch not long after they were installed.



Jim

My clutch shouldn't be an issue... I've already replaced the stock clutch with a dual friction clutch from SBC.

 

[PRout]

Keep in mind you can never turn injectors off. #@$%!Jim

Exactly. . That's one of the reasons I went back down to the 275's was hopefully to add some efficiency (economy) while just driving normally, and have lower egt's while towing. Then have the timing box and adjustability of extra fuel with a fueling box for those times of more power wanted. Not sure I'm seeing a significant economy increase with the smaller injectors, although they do run relatively cool and have good drivability. The only drawback is the added electronics and tapping the VP44 wire reduces the odds of reliability. Also, not too thrilled about reprogramming the ecm anymore, so was weighing the pros & cons of eliminating the electronics and just upping the injectors instead. "Simplicity vs Drivability". The Mach 4's seem to be getting great reports. Just would like to hear some reports of how they perform without extra timing advance, fueling enhancements, etc. Seems they would naturally increase timing a bit on their own, but how do their egt's & economy/smoke compare is what I would like to know.

No clutch slippage problems here either. . :-laf

 

[BradPatterson]

With my setup on turbo and injectors only I could drive almost smoke free with no heat issues. I don't tow heavy and I'm at sealevel but with Smarty on 3 the truck has great power without having to watch the gauges as long as you stay on top of the turbo. I did notice an increase in fuel mileage on the first couple of tanks while on the hightway soon after the install, haven't really checked after that. Day to day driveing with the right combo of fuel and air in all honesty I'd say the increase wouldn't be noticeable as the truck is just too much fun, but everyone has their own style of driveing... ... ... ... ... ... ... . bp

 

[DIESELWRKS]

Mach 4's etc. etc.

Okay my I like my m 4's like I said before with TST3 off and just on smarty I only really get bad smoke on levels 5,7,9 I had to relearn to drive the truck and the clutch to control smoke on take off. it wasnt as bad with 32 and 33 inch tires but now 35 its more. if I run smarty 5,7,9 and anything higher than 5 on the tst I get a bad shudder or surge this was worse when I went to the mach 4's vice the 100 hp injectors before I think this is due to more timing now. my FE clutch I can slip it very easy when Im on smarty 5,7,9 but it wont slip at all on smarty 2,3,4, and TST on 7,8,9, I think this is due to the power/torque curve of the smarty and how it hits. I dont have a egt issue yet with the mach'4 I found them to run alittle cooler than my 100 jammers I had prior I usually see at 70 mph around 700 deg wot maybe 10-1100 if I hit hills and high elev. I live at 500 elevation so there isnt a air issue. I think the HTT 62/14 and Mach 4's make a great combo hope this helps you









2002 HO 6-SPD LB 4X4 QC HTT 62/14 SB-FE SMARTY TST PM3 MACH 4'S, RINGED AND STUDS, AFE/2 "SILVERLINE D/PRICOL PYRO,BOOST,FUEL FASS 150, VULCAN 1/2 DRAW-STRAW, VULCAN 3/8 FUEL LINE AND FITTINGS, DSS-TRAC-BAR STEER-BOX, RIDE RITE AIR BAGS,17'' KMC BLACK HOSS, 315/70/17 MICKTHOM MTZ'S 6" RCD LONG ARM LIFT AND DE-BADGED FOR FUEL MILEAGE. :-laf

 

[PRout]

Yes, it helps a lot - Thanks for all of the input/comparisons. They have always sounded like good inj's, especially when you hear of stories of someone going straight to 4's from the DD2's and thinking the 4's are just as drivable with more smoothness and 75 more HP. (just one example).

I guess the only way to find out is try them yourself and see if they fit your driving style & wants.

Since I'm less of a "racer" type and want the truck to appear as close to stock as possible, and just want a good running, reliable truck that will haul anything thrown at it without having to baby it up the hills (thats the main concern about using big injectors), want a good rig for exploring ghost towns & hidden lakes in the sierras, metal detecting in the boonies (like Death Valley), I think about that "Pump wire" being tapped and putting more stress on the VP. With 4's, it should be loafing but would still have the inherent timing increase of the big injectors, without being overly rattly & lopey.

Might have to try some one of these days, but will definitely hang on to these RV275's & mild edge box because they are a great running combo, just can use a little more punch from the fueling box sometimes.

Now, Bob4x4 is talking m2's & a ttpm box make a good combo. . ahhhh geez! The problem is he's usually right.

But 4's only (with the quick spool of the HX35) might make for a "sweet" running rig that gets decent mileage as well. And have a happy VP44. That's ALWAYS a good thing. .

Then when "the man" looks at it at one of these random inspection points that are starting to pop up, it will look & sound nice & stock with no power boxes glaring at them, and the stock airbox is working fine with the PSM cold air mod with the black hose which appears stock also.

"Geez officer, not sure why it runs so well. . must be that high quality "BioWillie" fuel I put in the tank back there in Texas??"

Actually, so far the current setup has a lot of flexibility. Should keep it that way, but sometimes you just want to see for yourself how well a product works.

 

[cArNiVaLwOrKeR]

Would the SBC Co OFE handle the Mach 4's?

I am almost ready to pull the trigger on some...

 

[OPoole]

With your set up adding the Mach 4s you should have 460-470hp. The SBC con ofe is safely rated at 450hp. You should be just fine.

 

[cArNiVaLwOrKeR]

Just got home from Craig Johnson's Big Power Diesel in Palmdale Ca. with Mach 4's imstalled, wow, what a difference, I even got better mileage as well, 18. 6 Freeway not going over 72-73 MPH,



Did anyone here experience Better or Worse mileage after install???



JoeLee

 

[cArNiVaLwOrKeR]

I think the truck cruises way better @ 68MPH no faster no slower.



LVL3X5 or 1X1 or 5X5.



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