I just got off the phone with Paul from High Tech Turbo. After I told him what I was doing to the truck and how much power I expected to make (450/950) we decided on the HTB2 w/12 cm housing. This turbo is good to around 475 hp. I am running a DRAG COMP and DD-3's. What do you think? will I be seeing EGT's over 1400? with box on 5x5? should I go with a 14cm? Thanks -=Neil

 

What wheel did you get?

Wouldn't hurt to have a little more air if you can handle a little more lag.

Get rid of those DD3 and get some EDM 4 or 5 and you will be over 500!!

 

I have a feeling the 12cm2 housing is too small for 450 Hp.. EGT control will be an issue. If it were me I would opt with the 14. Spooling won't be an issue with the fueling upgrades on your list....

What are your temps like with the stock 12cm2 HX35??? You will have more flow on the compressor side, but the 12cm2 side is still 12cm2. Maybe I don't understand the specs properly...

 

I think with the htb, you are going to be over 450... with the Comp, and DDIII's
Bryan

 

The HTB2 is a 62 wheel. I can hit 1450 and go further with my setup now and that's with an HX35 w/14cm housing. I may call Paul on Monday and upgrade to a 14cm housing just to give me a little more cooling. Paul seemed to think the 12cm would be ok. It''s the same price for the 14cm , might as well do it. I'll call HTT on Monday as there closed now. Thanks

 

12 is too small.

Go 14.

 

Thanks, btt

 

I'm assuming you're not a drag racer or puller. If so, you'll be very happy with the turbo you've ordered. Spoolup and drivability are other factors which should be considered besides max egt control. I also don't think the 12 cm housing of the HTB2 can be comared to Holsets of the same size. It does a much better job of egt control than a PDR HX40 w/16 cm housing, for example, and spool better than your 35/14.

 

Bart, Thanks for the reply. That is the kind of hard info I need. So I shouldn't have a problem keeping egt's in check with the 12?

 

I'm running DD3s, Drag Comp, Snow water/meth, and the HTB2 on an ETH, for over a year now. On a hot day pulling up high altitude passes EGTs will get up around 1450* if I'm pushing it real hard (without water/meth), but IMO are easily controlled. If I'm running at lower altitudes or on cooler days, there's not any EGT problems.

Had I known how good this turbo is, I'd have never tried water/meth, which I use for towing.

The HTB2 gave at least a 40 hp gain over my hybrid 35/14 Holset, with absolutely no loss in low rpm boost. Drive pressures are no worse than 1 to 1 up to 45 psi boost, and it pulled 45 psi on the Silver State Motorsports dynojet last November in Vegas. To my shock, I was the top dog on the dyno that day. HP was 542 using water/meth and windshield washer fluid. This was also done using the stock air box, with no other modifications other than a K&N and the rubber air horn removed.

 

Thanks Bart,
I feel better about the purchase now that I have heard some real world results, from a truck just like mine. 542hp, thats an insane HP number! How much does the water/meth inj give you on the dyno? I was hoping for around 450hp, as I dont have water/meth inj. -=Neil

 

This is the exact setup I want to run on my rig also. Im about to order my comp box, but injectors are coming later. I too can not decide what turbo to run with around 500hp, but now I have gotten a better idea of what I'm looking for.

 

Isn't that something ... technology advance in turbos is great. I've got a low to mid 400hp levels (depending on the dyno) & am @ 1400 on the dyno. I can get 1400 on a 4th gear pull too. That's with a 16cm housing too. That's whats so hard to swallow about the HTT 12cm housing, when you think of Holset 12cm. Definately a horse of a different wheelbase.

You're going to have to keep us informed on this thread Neil. Great stuff here.

 

will do....

 

There's something that everyone needs to understand. The settings you dyno at aren't necessarily going to be the settings you tow at. I don't tow with the Comp set at 5/5. Usually I use 1/1 or turn the box off. You might be able to tow at 5/5 at lower elevations using the HTB2, but here in the mountains I can't do it unless using water/meth. What ultimately holds you back will be engine temps after reaching 400 to 450 hp, anyway.

If you decide to water/meth with an ETH you ought to plan on having your engine o-ringed. I have no idea how much water/meth is worth in terms of horse power on my rig. At the time of the 542 dyno run I was running Snow's stage 2 system set to come in at 20 psi boost, with max at 32 psi. The pump was set at 250 psi and I was using 1 .625 jet with -30* windshield washer fluid. Horse Power guys use 2 .625 jets and 50/50 mix, but I don't know at what pump psi.

Bottom line is you'll like the HTB2, IMO. It's not necessarily for horse power junkies, but you'll be impressed with how much better than a HX35 or HX40 it is for every day use and occasional hot rodding. It's also pretty stout, and doesn't blow up on 3rd gens using the TST box with the old aggressive programming.

Good luck.

Bart