Thinking about the idea of a Twin Turbo Kit and wanted to know what everyone recommends.

 

Most kits that are still available seem to be just a single setup. But there are shops that can custom fab a twin set for ya. Jsut do a search on here. I think that INCON and CAS was the only twin kits available but they arent anymore. Not 100% but thats what i have gathered from research in here on them.

 

I'm doing a DIY...

The hardest part will be the headers... I'm going to start with a off the shelf set of mid length headers and go from there.... Look at the Incon pictures for where the turbos need to reside in the chasis... The rest is just working with mandrel pipe bends... steel for the exhaust and aluminum for the turbos intake and intercooler pipes.

The first thing I recomend doing even if you buy a kit is learning about sizing a turbocharger. How to read a compressor map... All about turbine housing a/r etc......

 

What about Total Performance (also known as Turbolocity)? Anyone heard about these guys work with LS1's, or actually own a kit from them? I know the Mustangs they do are awesome. There is a Bolt-On LS1 twin kit they make, but it seems they changed there web-site for the moment http://www.turbolocity.org or http://www.nothingbutperformance.com There pricing was around $6K with intercooler.

 

I'd need to see the specs... It is'nt that high of a price but I don't know what the components are to make any judgement..

 

good luck. seems a custom kit is the only thing you could do.

 

Yeah thats what I was thinking.......

 

Like I told you the other night, QMP is moving toward a TT kit soon... Already made Rob an updated logo for them.

 

Also, Some people will tell you to fab your own, but I know you would rather have something already fab'ed... So your choice right now is a turbo shop (there are none other than Bill Anderson around us) or QMP (get in line, several cars a head of you) or a used Incon kit (again, good luck)

 

I know of one company that will do it. it is$$$$$$$ and it takes some time.

 

I have fabed alot of my own stuff.

Honestly I'd be happy with a premade header and with a T4 flange on it that is positoned to allow a turbo with To4e compressor to clear.. Everything else I can get form turbo vendors... Everything... Braided SS oil feed line for a garret CHRA etc.. Braided ss oil drain line... These shops make a bundle on these kits.

In the DSM scene we talk turbo wheels, housings, intake pipes, intercooler pipes, BOV's, intecoolers etc... like people here talk strokers, cams, intake manifolds etc....

Making your own system is'nt rocket science... The hard part for most people would be the header due to a lack of welding experience and minimal R&D to figure out just where, what angle and what rotation of the flange... If a tubular header were made by someone I swear anyone who has done an serious mechanical work on the car before can do it... From there it is just bolting up the headers, turbo, vaccum and oil lines. Then connecting pipe bends with silicone coupler and clamps... As my project progresses I'll make a DIY webpage...

Kit form or not the power output of the kit will depend entirely on the ECU programming and engine specs like compression ratio and cams... You could have the best kit in the world and without enough catback flow it will choke.... Not enough fuel? well by by valves, pistons or rods..

I made my own IC piping, IC mount and got components from many different suppliers. I just made sure I got the best I could afford that worked together and everything else on the engine and chasis ready for the increased power.

Someone in the town heard what turbo I was running, bought a kit FMIC with pipes, turbo with install kit... etc... near zero DIY and blew his engine the first day.... Not enough fuel + big turbo = Piston in oil pan and half a rod on the road.

Exhuast on any TT V8

Most people should run 3" duals, maybe an H pipe... with turbos an Xpipe does nothing a H pipe does'nt. Just balance the pressure...

With a bigger turbo and higher boost levels upsize to 4"

Use magnaflows.. On the 4" use the round diesel muffler and crisscross them outback like the glasspack duals.. It's just a bigger version of the gas stuff.... Any muffler sounds completely different with a turbo car since the turbine alters the exhaust sound and flow as compared to a magnaflow true dual non turbo engine... Like how NT hondas sound like weed wackers compaired to a GSX with the same muffler... You want a zero restriction muffler on a turbo...

Alot of kits leave alot of peripheral parts and info out completely... No catch can crankcase breather kit... Etc... Alot of little tidbits are left out.. Honestly I think the incon kit looked like ***... The exhuast manifolds were ok but all that hose instead of hard intercooler pipes really sucked...

None of the fabrication of the hard parts it rocket science... It's pretty easy.... The hard part is picking the right turbos and setting up the engine, exhaust and fuel system to make use of all that new airflow...

Also get a cam... Figure out how much boost you want to run, your comp ratio, power band (stall or stick) and call comp's hotline or your favorite... Cams matter big time... The right cam for the setup really helps...

 

Damn, thats alot of typing you just did.

 

I type fast...

Maybe I'll sell some modified mid length headers, CAI's for the turbo inlets. Ic pipes turbine housing to catback piping etc...

Or just start doing cars around here...

 

I believe Nasty Performance has some turbo headers they sell for the LS1 they are a sponsor here give them a ring.

 

Thanks for all the info guys! I have alot of thinking to do.............

 

Brian, just a word of caution and to add to your thought processes... a TT setup is just the beginning to a FI vehicle... for reliability you're going to probably spend 10-15k in additional mods, and parts... and that's including safety equipment for nhra tracks.. If you're looking just to add some boost for a streetable car, then maybe a little less... Also, FI is a passion so if you get frustrated with your car easily I'd take that into consideration as well. lol... Expect your 4l60e to die right away, so I'd suggest a built tranny... and your vig converter you have sitting on the shelf... Anyway, we can talk a little more one evening if you're around... Been trying to convert thorney to a TT z06

l8r

 

this is right, FI is a paint in the butt if your impatient like me

 

Thats what happened to me. i got feed up after 2 years and gobs and gobs of money!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
It aint easy, but man is it good!

 

Yeah It will defently be expensive! Guess I'll start saving now

Damn Rob, Thorney is actually thinking about a TT Z06 !!!!

 

"Guess I'll start saving now"
Id start building an engine now...

If the engine has'nt been built specifically for turbocharging I dont see the point. Just get a supercharger if you are running low boost... The low psi you can run on a stock bottom end can be provided relatively efficiently by a supercharger.

A well designed turbo system can produce two to three fold that boost at a higher efficiency.. You just need an engine that can handle it. Strong rods, strong crank, reduced compression and the right camshaft at the minimum..

Which is why I'm starting with an engine first before I even get the car..

1. Turbos.
2. Engine
3. Transmission to handle atleast 25% more power than I'll make.. Expensive.
4. Then I'll look for an already caged rolling chasis or a base model 6 cylinder..
5. Fab9 style rear end with beefy brace and custom linkages.