Can I run a stock turbo with Mach 4's? And if I can, can I tow say 10,000 pounds once in a while? Maybe once to twice a year without smoking the motor? Barring that I am careful. Careful in what way? And yes I know guages are first as well.

 

Way to much injector for a stock turbo IMO. It would probably run good without a load, but I could see it heating up really fast under a heavy load ie..10,00 pounds. Are you running a programer, fueling box, tst...?

 

From what I have learned on this site, it doesnt sound like a great idea. EGTs would be a real issue.

 

Yes, you can tow with Mach 4s and a stock turbo. Is it a good idea?

That depends. Do you like hitting screaming high EGTs at 25mph knowing that you'd going to have to crawl up to speed the rest of the way with your eyes on the pyro instead of the road?

If you drive and accelerate very moderately, then absolutely you can tow with Mach 4s. How can I say this with such confidence?

It's simple. The stock turbo will cool 245hp worth of fuel. That's the original design spec of the engine. All injectors do is increase the flow rate POTENTIAL. (well, there's other things like rate of discharge and effective timing and such, that are minor).

So if you only use 245hp when you have 350 or more, then it's not significantly different than having a bone stock truck with perfectly safe EGT.

Here's the easy way to tow with Mach 4s and a stock turbo:
1) Block the wastegate
2) Limit BOOST to 30psi.

Assuming no boost leaks and no lugging the engine, there's simply no way to get the truck into dangerous EGTs without exceeding 30psi of boost when the stock turbo has the wastegate blocked.

Lots of guys towing big 5h wheels are running that turbo to 36psi or so with smaller injectors and doing it with borderline safe EGTs.


The sanity check in all this is that you MUST have a lot of discipline to do it, and you may get frustrated and slowly crawling up a hill at 60% pedal, knowng that the last bit of pedal is off-limits. You can hit 30psi pretty easily when towing.

Justin

 

If your careful,yes you can,you should have a boost elbow and a fooler(edge EZ or smarty)have the turbo set to hit 30psi + under heavy load.Stock wastegating ,it will get too hot real fast.My buddy ran that setup,no problem with comp on level 1.You have to watch the EGTS on the hills.A stock turbo on a 2000 will cool 300rwhp easily,esp if the extra power comes from injectors,not working the duty cycle of the pump.

 

With DD2s and an EZ, I can hit 1450 degF pre-turbo EGT at 34 PSIG boost easily with my stock HX35W-12 turbo when towing our 5th wheel. Therefore, a pyrometer is an absolute necessity in order to monitor and control EGTs when towing. The guys at Diesel Dynamics said that the stock turbo was pretty well maxed out at 320 to 330 RWHP for towing - in retrospect, that was pretty close as I'm toasty at 347 RWHP and 762 lb-ft. So, yes, I drive by the pyrometer when towing.

Rusty

 

I wouldn't recommend it..... If you are headed west into Ohio then you you can get away with it but if going East into the hills you are going to be HOT. Mach 4's really need something like a 62mm turbo to keep the egt's down. If you decided to give it a try keep the rpm's up, don't lig the engine. Also as mentioned you will need some sort of boost fooler, install it and a boost elbow.

 

Wow, thanks for all the info. I guess injectors and a turbo go hand in hand. I was trying to upgrade one step at a time. No wonder the BOMBing bug hurts so bad! Ouch...

 

i tow over 25,000lbs with mach 6's and a smarty on 9 with a sps 62. so i would think you could do it with 4's and a stocker. being as how ive done it with jammer 4's and a edge comp

 

RJohnson is making 600+ with 4's, TST comp, and Smarty (AND yes a few other things...) if that tells you anything. Thoes are some pretty agressive sitcks there. I have 2's and EGT's are not an issue when loaded heavy. BUT i do not have anything else fueling wise. My clutch wont hold it. PERIOD! My intake is an AFE Stage II with a cowl hole and my exhaust and turbo are stock. UNLESS you got one heck of a deal on those sticks....i would look at a Smarty or something else....OR see if someone with 2's wants to upgrade to 4's if you have them already....and no im not ready! haha..... My 2's put my boost at about 32 PSI WOT heavy load on a hill (I do have an elbow installed from Edge EZ). Just seeing what she could do!

Another hint...dont start with aggressive engine fueling mods first when starting to Bomb. Sure they are more fun.....who doesn’t like 100+ extra horses......but man.....you need to get the air in and out first....then look to get the fuel to the VP-44. Then start with some modules and such....once you get that figured out...then go to the big injectors.....

 

I towed 8,000 lbs with Mach 4's and a KSB-1(bigger than HX-35)... on level ground from Dallas to Houston. Had to drive by the Pyro cause EGT's got hot.
I don't think you would like it!

RJ

 

i have edge jammer stage 4's and edge comp but it was off. i just towed this weekend i was able to go as fast as i wanted up little short grades in the foot hills and the egts got to around 1100 but that was also a 18foot flatbed trailer with a 70 k5 blazer on it not too much of a load

 

should have turned your comp on low. gives timing and helps egt's

 

How about everyday driving with the Mach 4's? Pennsylvania has lots of hills! If that wouldnt work still, what would I have to do as a minimum to allow them in the signature? Thanks.

 

You could run them for everyday driving in PA (no towing)..... You will also need some type of boost fooler or box, I would go with an Edge EZ.

DOug