why is there so few option out there for twins for our trucks. the only things i can find are bd , industrial, ats, and source automotive. there has to be a cheaper option for a guy that wants twins. i can find a s400 for $600, but i cant figure out how the other 3ft of pipe is worth $2000. I also realize that i can fab it up myself, just alittle short on time.

 

i was wondering the same thing. and there dosnt really seem to be any twin setups that run 2 fairly small turbo's that would be good for towing and still able to have fun at the strip but then again i dont know much about turbo so yeah.

a decent amount of people here have fab there own kits a search might answer some questions.

 

I'm gonna take a guess here and say labour takes up a good chunk of the price, as well as some of the materials. For example, in my neck of the woods (as well as what I've seen online), 4" 90 degree bends will go for about $40 each. You will need 3 of these for your interstage pipe, as well as some straight pipe too. Now you need someone to cut, and weld them, then grind, smooth and powdercoat/paint them. Shop will charge around $80/hr for labour. Not too mention consumables. You will also need flanges (whether its V-band or T4, T06, HX35 back plate, etc) made, which is either CNC'd, plasma'd, or old fashioned drillpress and grinder. If you make a set, log your hours, then put that into a monetary figure. I gaurantee it won't be cheap.

I've heard estimates of 100hrs for a home set of twins. Obviously a shop will take less time if they've done them before, where they have jigs and measurements to make them, but still takes time, and its not all automated.

 

I did my own. I use a hx35 14 and a 416$ ht3b. They have been on fr a few years now. Fabulous results. I scaled 26160 two weeks ago and I pretty much out pull everything on the hills. I ussually hold boost to 40 and less on hills just so I dont pop a coupler off or explode one.

I ve been running 55- 60 psi since I put them on. I run a 3 inch intermediate cold pipe, three intercoolers, (one is the oem) and ddp4's and a 10 plate full forward.

 

I think Tate pretty much nailed it.
Also there are a lot of little things that add up in the kit like boots, clamps, lines, bungs, gaskets, studs, etc. Sure individually they dont seem like much but if you got to go buy them they would add up as well. Plus my two kits came with ATS manifolds. So in short if you have lots of time and the resources and equipment at hand you could build a set and save your self some money but you need to think if it takes 10 hours to install a pre built set how long it will take to build and install and source the parts.....I know I would have been down for weeks.

 

The hardest parts were doing the intermediate hot pipe even though its only 10 inches long, and the down pipe. Fitting a 5 inch dp in there was though. I have a notch cut out so it clears the trans/belhousing bolt, and then ovaled the pipe slightly. My intermediate hot pipe deals with several angles all at the same time, and there isnt a lot of room to reach back there when mocking up.

The other problem is turbo choice. I could make twin pipes al day long now, and sell them cheap, for my setup, not an s300, s400, not a super b, just an hx35 with a 14 housing and an ht3b......that would be the only choice.
I do custom turbo system for gas engines all day, (day job) and everyone is different. I do mostly the same cars, but everyone is still different.

People make choices that almost always effect something else.
"kits" are very hard to make and have go entirely smooth in the real world.

 

Even if you have the requisite skills, experience & parts - it'll take twice as long to build your own kit the first time... so unless you don't mind working for peanuts, it's cheaper in the long run to buy a kit if you consider your time valuable.

 

You might want to look at BD's regular twins...

2 fairly small turbos... check(both are S300 frames)
good for towing... check(targeted for the towing market)
fun at the strip... I would imagine so... quick spool, nice punch at the top end... but obviously not meant for huge(600+) power

 

i have the turbo on right now that i would like for the top, and im thinking a s400 on the bottom. I dont see why a guy cant use some pressure rated hose with 1 90 degree fitting instead of hard pipe. i can get the s400 for about $600. just some thoughts.

 

how would those bd street twins be compared to say a 62/71/14. plans were building the trans and a set of Mach 4's

 

There is a vendor out there on ebay, local to me, that uses pressure rated hose for his twin setups. They are silicone for the heat and oil resistance and then kevlar lined for strength and heat resistance. Not cheap!

Remember that there is a lot of heat, and up to 50 psi or so. You will want something rated for at least 500* at least 100 psi, and it needs to be at least 3" in size, and it needs to be reinforced so that it wont collapse when the top turbo lights first and causes a little suction as it pulls air through the bottom turbo.

 

If you are looking for twins, I think Keating Machine sells a pipe kit to put a HT3B as a secondary turbo on top of whatever for like $1600. Another $400 for the turbo and you have yourself a set of twins that can support 800rwhp. Kit includes all oil lines, fittings, etc.

 

I think alot of that price is to cover the original R&D.

 

When China starts making them the price could drop.

Jim

 

LMFAO!
Good one!