Muddin_dude06

My friend got an '01 Ext. Cab Swb 4x4 with the HO 24v and 6sp. He already has a full turbo-back 5" straight MBRP exhaust and is ordering gauges tonight (I think) will he be able to use 150 HP injectors and not totally screw anything up? I figure with his truck he will be just fine with everything being its got the bigger clutch of the 6sp and will have gauges to monitor everything, has anyone ever run a similar setup, did any problems occur? Thanks for the help ya'll!

bnold

Keeping those injectors cool with a stock turbo may be a problem if he tows...

Beast2B

my HO clutch started slipping with just a Comp (above level 3x3) added after the exhaust and intake. stock turbo isn't big enough. he'll need some sort of boost fooler (Smarty, Comp, TST, etc) so the ECM won't shut the fueling down at ~22psi boost.

Ph4tty

I put in 150 hp injectors in my ho and had the same thing these guys mentioned- I threw a bunch of overboost codes and needed a new clutch. A smarty and and a sbc clutch later I was set.

AggieJustin

Here's another vote for a new clutch. My clutch gave it up with just the EZ on it. And without a boost fooler, you'll definitely be hot under a load. The HO likes the injectors, you'll just need to give it some help handling the heat.

Muddin_dude06

Oh wow I didn't even think aboout overboost codes, are there any inexpensive boost foolers? If not 150HP injectors what could the clutch handle? I know he wants the 150's so maybe he will step up at the same time and get a clutch... How long could he get by with using the stock clutch as long as he uses the throttle sensibly? Hmm, if he did get 150's how bad would it slip the clutch until he upgrades? I think he will most likely have a new clutch by the time 2007 is here anyway. He doesn't tow at all but can have a lead foot at times... This is all deffinately something I will mention to him.

AggieJustin

No use going for just a boost fooler alone, might as well spend a little extra and get at least a small box that does timing and fuel as well. Or get the larger box and don't tap the wire till he's ready.

If he drives sensibly, he might be able to make them work. Hohn did on his, but if he puts his foot to it, there are no guarantees on that clutch.

RJF

Forget the 150's and go with a Mach 1.6 or maybe a Mach 2 at most. Thats 85HP or 105HP over stock. 85HP is going to push EGT's up and also push the clutch to it's max. 105's will be too hot for the most part for the turbo and will slip the clutch. We have 65HP injectors in our HO and can easily hit 1300* pulling hills when towing, stock exhaust. Lay into the throttle just right and bog the engine a little and you can peg 1350* empty.

Beast2B

if the intention is to buy the good stuff and buy it once, then he will HAVE to drive sensibly until the clutch happens. Everyone wants the power now and to make clutch/tranny mods when they need to... if he has the bank to make all the changes within 6 months, go in any order. my suggestion is for gauges and clutch first, fueling box next (allows boost and rpm mods), injectors and turbo last.
or buy it in reverse and be prepared for codes and slipping clutch! he can make it work, but it sucks driving your truck at 50% power potential.

rebal

i would go with mach 1.6s in an HO it will make gobbs of safe power better MPGs but a clutch is in the future . i tow heavy and keeping EGTs in check is not a problem.+ 20-24 mpg is a huge deal now days

HOHN

I ran M4s for almost a year on a stock clutch-- with an EZ, then a smarty. It can be done.

But I NEVER once towed with the setup. I suspect it could be done if the Smarty was set to half-power (which is roughly the same as a stock HO) quite safely. Anything more than that could be costly.

I also still run the stock turbo, which is actually and advantage with the big sticks because you get into the boost so much earlier that the EGTs don't light off so scary fast. Obviously, you can't tow heavy or sustain high boost with the setup, though.

There are a couple ways you could use the M4s safely:
-- limit boost to 32psi with a blocked wg and stock turbo using your right foot.
-- Limit EGT to 1300 max for sustained run. For a couple seconds, you could push 1500.

jh