Mike D

Anyone running Mach 4's with a stock turbo and no fueling box?

What kind of boost are you seeing and what are your EGTs like when empty WOT?

Just curious,

AggieJustin

I know that HOHN was running them like that. Let me see if I can find an old post where he talked about it.

EDIT: Here it is... https://www.dieseltruckresource.com/...ad.php?t=72033

Mike D

Looks like me and Hohn are it.

I'll post my findings for those interested in getting some bigger sticks.

I have some 4.5 in the truck. At WOT I'm seeing about 38-39 lbs of boost (stock turbo HX35/12) and about 850-875 degrees post turbo temp, I'm going to move the pyro pre-turbo soon. Cruising down the hwy. I'm at 550 deg. at 65 mph. From my understanding post turbo temps messure roughly 300 deg less than pre. with little boost, I personally think it's about the same just cruising down the highway maybe only 100 degrees different, but as the boost comes up the difference in temps grows.

From a stand still with zero boost matted, smoke is a problem... After say 20 lbs of boost it pretty clear behind me.

I guess it will get interesting once I decide to add a fueling box.

I'll be keeping a close eye on the turbo threads.

HOHN

I've added some electronics. No more stock ECM

Mike D

Beta bragger!!! I have pretty much the same setup as you if you run on Smarty level 9...

Justin, Have you had a chance to dyno yet? I'm going to try to dyno this weekend.

HOHN

No dyno. All it would do is show how badly outclassed my stock clutch is. Besides, my turbo's done ~ 32psi, and it will go up to 38psi.

I need a clutch before I can dyno. It holds just fine in daily driving (for today, anyway) but that could change tomorrow (I think it's starting to already)

getblown5.9

yea i found out my stock turbo is biting the dust...during my oil change last night i jsut happened to grab the shaft...only to find a bit of play in it...42 psi will do that tho. banks big head wastegate doesnt open even at 40+ psi

Mike D

Over the weekend I got a chance to put the truck on the rollers.

My previous dyno numbers were 244/582, that was with MAD/Catcher ecm and RV275's injectors.

This weekend the only thing that changed was adding Don's Mach 4s. The numbers were 360/840. So I gained roughly 115 HP and 260 Trq.

With a nice turbo I'll crack 400 hp w/out a fueling box.

Don M

Thats awesome Mike! With a HTB2 or similar, 410 HP would be cake.

Don~

Mike D

Thanks Don. After seeing a couple of my fellow NC Chapter members ( The PapaSmurfs) gain 60hp with a HTB2 turbo swap, I agree.

HOHN

Heck, Bob did 401 with a little DZ.

With a bigger turbine size and more lag, you could probably get near 420.

I'd rather have a quick-spooling 410, though.

12valve

hey whats the price on thos mach 4's?

and where are they cheapest? website???

on a 215 - 12 valve with 370's and an HTB2 /12
how much would the power increase be?
never dynoed! 105 mph in 1/4

thanks fellas

Eskimo

I bet that's a nice kick in the pants Mike!

12valve, no Mach4's for us properly valved folk, but I'll let you know how DDP4's work in less than a month..

Ph4tty

Prices and distributers can be found here:
http://www.f1diesel.com/injectors12.html
http://www.f1diesel.com/contacts.html

HOHN

I think that once you get Lenny's sticks in, you won't be injector shopping for a long time. Good injectors, is the word that I hear.

jh