HOHN

Bigmack-- in your case, you won't see any improvement in spoolup going bigger than a Mach 4-- it might actually get worse.

If you are stuck with the 64/14 turbo, then you have to use a Mach 4 or maybe even smaller.

But if at all possible, not ONLY should you go with a smaller housing, but a smaller turbo in general-- a 62mm like the Super Stock 62. You're gonna hate the lag and smoke of a huge single and huge injectors with an auto trans. Now, keep in mind that the aftermarket tranny upgrades are going to tighten up your tranny (which is good); but the tighter trans will only make your lag and smoke worse.

Bottom line-- you need a smaller turbo for that auto trans. If HTT can't hook you up, you could probably sell it used for about what you paid, since the HTT turbos are pretty highly regarded.

I can't emphasize enough the importance of spoolup to making a truck fun and useful. You'll notice that I'm STILL running the stock turbo, which is WAY too small for the amount of fuel I'm running-- about 75hp too small!

When I upgrade, it's going to be a conservative upgrade to a 62mm turbo, because that spoolup is just so important.

JMO

bigmack2500

So I need to go to a 62/12 and that would be the ideal turbo and with that I can run bigger sticks, like the mach 5's or 6's.

bigmack2500

What about the trucks that are running that 64 mm and the 66 sled puller turbos
how do they compensate for the lag do they fix it with NOS or Meth injection.

dieselfan

they run big stixs and fueling boxs.

dieselfan

hes saying go with a 62 for spool up reasons and since you have an auto, but i doubt you could run that big of stixs with a 62 comfortably .

you should stay with the 64, unless you are disappointed now. you will be happier with more fuel.

here is Mike D sig
look at this setup 64/12 with 4.5's puttin down 507/1042

99 2500 CTD SB/QC 4x4 Auto SLT Trans with IE Billet input/output built by TRE Diesel "Timinva", Goerend race VB, SMARTY, TST COMP. PM3, F1 Mach 4.5, 64/12 Killer B2, Thuren Trackbar, AFE, 4" exhaust, Isspro Egt, FP, Boost, Tunes provided by Eclipse 8053, Zapco Amps and JL Audio.
NC DTR Chapter #18 Member

Dyno 507/1042 (Corrected) with Killer B2, Non-Comp. TST and Smarty #3

13.025@102.71 MPH 1/8 mile 8.28@83 mph Dec. 10th 2006 with regular TST #9 and Smarty #3!

bigmack2500

Ok comp on 5x5 and smarty on #9cachter not enough, I'm trying to find a way to make my turbo work well, and not have to change it out. I'll try anything and
I'm aware of the domino effect if u do this u have to upgrade that.

dieselfan

look at the sig i posted its a similar setup except you have an edge instead of a TST. it 500+hp thats what you wanted huh? reread the post.

HOHN

No, what I'm saying is that you should run a 62mm turbo and that mach 5s or 6s won't spool the turbo any faster than mach 4s.

However, if you're happy with your 64mm turbo (and many guys are), then you could definiely run a bigger injector like a Mach 6. Do NOT expect a Mach6 to spool the turbo faster than a Mach 4! It won't happen!

As for those guys running the Sledpuller 66 turbos and such-- Yes, the run huge injectors and fueling boxes, but they STILL have lag to deal with. And because the do run the big sticks, the lag is much smokier than with smaller injectors.

So how do they deal with lag? The live with it and rev the engine higher. There are some guys who say a turbo spools "not bad" if it's spooled by 2000 rpm. To me, that's way too laggy.

JMO

bigmack2500

If more fuel will fix the problem then I guess I'm going with more fuel. someone had said that to much fuel could hurt me though in an early reply.

HOHN

That's the thing: more fuel won't fix the problem-- it will just make the problem tougher to live with.

bigmack2500

So the lag I'm going to have to live with but if I go with a Mach 5 or 6 once the turbo is spooled up there shouldn't be a problem running these injectors, other that my EGT's going up. The EGT's can be fixed with some drugs hinting the domino effect.

dieselfan

you should be fine b/c of your location and the HUMUDITY.
4.5's would be the conservtive choice.
6's would keep you from buying injectors again.

bsp

I really like my sps62/m4 smarty combo. It can be smokey on#5,7,9 if you aren't careful,(lugging the motor). Like Hohn says, with a tight auto and my taller 3:54's, it's a different way of driving than when stock. Towing on #3 is pretty clean, however, I'm at sea level so not much help there. Overall I think this combo is great, and on the big highway this is one nice cruising turbo.

bigmack2500

I probably going with the mach 5's they say the 6's are for twins

Tate

The 6's are only 20 hp more, and IIRC, they are of a newer, cleaner design than the 5's. If' you're gonna go for 5's, jump to 6's.