i dont need the 1000hp but 400 isnt were i want to be either if i add a hrvp44 and a s400 bottom turbo and a built tranny do you guys think i will be above 500hp?

 

No need for HRVP. Even an HO truck can do that.

The Jammer isn't wastegated, if memory serves-- you'll want to include a gate in any twins setup.

I'd think that with free-breathing twins, you could do 500 even with an HO pump and M4s. If not, even a tiny hit of nitrous would put you there.

jmo

 

For 500 rwhp, a K-31, bth-3b, S400 or GT 42+ primary turbo will do that. You could do that with a single GT40 series turbo or big S300? You're running an auto truck right? You have an SO pump. Run mach 4's, easy 500 rwhp, with the right set-up. You tow? If you do go with twins, if not go with a bigger single

 

thanks guys! were can i get a good deal on one of those turbos mike i dont want to spend 1900 bucks on a turbo because it says htt or industrial injection

 

You can get a ht3b, bht3b, or a s400 from a truck junkyard for cheap.

 

I can find the BTH-3b or the S400 for under $700, freshly rebuilt at my local turbo turbo shop. Do the work yourself, save some $$$. Its actually pretty easy to put a twin system together. Its the little parts that drive you crazy looking for them. If you know what you need and where to go to get them, you'll save time and $$$. Hopefully this help, some.

 

can anyone give me a make shift list of everything needed to do twins and were i can get

 

any one at all

 

source automotive

 

NAPA, cummins, you're local turbocharger shop. semi-truck part shops. Any quality hydralic hose shop. The hard to find pieces will take some research to find where find. For me its 5in elbows, off your turbine housing. There enough info on this site to put together a decent list of parts. Hopefully this helps.

 

I would make an attempt to fab that elbow from formed 16ga sheetmetal. A cast elbow would be nice, but there's not a huge market to justify the tooling of a casting like this.

Maybe I should go into business making fancy cast parts that have very little market? hahaha

Forget that, let's hydroform them! Tooling cost, what's that?

 

wow theres alot more to building twins then i thought

 

sourceautomotive.biz and http://store.racing-solutions.org/turboflanges.html

 

Hohn , your insight on turbos and twins [ compounds ] seem very knowledgeable how many different Turbos and compound setups have you yourself ran or built ? And in your real world hands on experience with turbos would or has a gt 45 turbo of the same size as a bw 171702 s400 made more power on any back to back test that you know of ?? Is it true that ball bearing turbos must be water cooled to live as long as non ball bearing turbos ? Thanks for all your help

 

Twins sets built: Zero (see my sig)

I don't know of any back to back testing of the S400 vs GT45.

I *can* answer your question on the BB cooling, though. The answer is that "it depends."

Most of the Garrett BBs use a greatly restricted oil feed. Since oil flow is so low, they must be water-cooled. Some of the larger Garretts don't need water cooling because of higher oil flows.

The Turbonetics BB approach doesn't need water cooling-- it still floats the CHRA in an oil bath, sorta. The oil flow is the same as a stock turbo. As a result, it has enough cooling to not need water cooling. All this oil also causes drag, and is why a Garrett BB has a lot less viscous friction on the shaft than a T-netics does.

In return for the greater lag of the T-netics design, you get better shaft harmonic damping and more thrust capacity .

jh