2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

questions about engine manegement/Twin turbo

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Old Aug 16, 2003 | 06:40 PM
  #26  
Perry Gehenna's Avatar
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From: Australia, Victoria
0RX705 runs a twin TD06 turbo setup, i think the kit is a greddy one.
http://www.teamfc3s.org/forum/member...iew&car_id=191

Rank Rotary/Mazworks here in australia had a 13B twin T28 setup being made for a Datsun 1600 Ute iirc, it looked really well made..i think they have pics somewhere on their website

a TT setup always appealled to me for the very reasons mentioned. boost from 5000rpm onwards is useless in a day to day driving situation in my opinion. i liked my 300zx's ability to just get up and boogy really quickly with its two smaller turbos compressing air simultaneously
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Old Aug 16, 2003 | 08:26 PM
  #27  
NZConvertible's Avatar
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From: Auckland, New Zealand
Originally posted by Evil Aviator
IMO a twin-turbo 13BT is a waste of time, money, engine space, and weight.
I disagree of course, but each to his own. I really don't think this is going to take that much more time than a big single conversion, and money I'll get to next. Engine space and weight I don't hink are a big deal. I know it fits coz I've seen it. It just takes a little thinking to arrange it all. The weight increase is going to be a small fraction of the car's total weight, and a big single is also going to weigh a lot more than the stocker too.
A modern ballbearing turbo is going to spool up very fast.
Ya see, that's where it gets expensive. My take on twin-turbo projects has always been to use turbos readily availble cheaply from a wrecker. As an example, the Skyline GTS-t (not GT-R) uses a ball-bearing, ceramic turbine wheel turbo that makes 160kW (215hp) stock, and due to their popularity here would be easy enough to get for well under half the price of the turbo you suggest. I'm sure there are similar alternatives in the US.

You make a good point about the cost of custom work in the US, but after seeing some of the cars on this forum, I find it very hard to believe there aren't people around who can either afford to pay someone to do it or do most of the custom work themselves.

I'm not necessarily saying this is the best way to upgrade, but it is a viable alternative to slapping on big slow-spooling turbo. For a street car it has huge advantages that (if you're so inclined) outweigh the project's difficulties.
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Old Aug 16, 2003 | 10:04 PM
  #28  
$150FC's Avatar
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From: Birmingham, AL
The twin turbo 13BT is going to need two smaller turbos (twin HT18's are too big for the quick spooling requirements), a custom exhaust manifold ($1,000 to $1,800), and the "monster" specs I was referring to included the twin intercoolers and two throttle bodies on a custom intake manifold. The cost would be even higher with new aftermarket turbos with external wastegates.
Come on. Twin intercoolers, twin throttle bodies, custom manifolds. If you do that, let's face it, you're an idiot. There is no reason. Is there any twin turbo car on the market (hell, has one ever been made) with one intercooler for each turbo, and one throttle body for each turbo? I don't think we should even consider that as part of the computation. One simple y-pipe would take care of the problem entirely.

As for the custom parts prices, I stand corrected. LIke I said, I don't realy know the prices for stuff like that.

If HT18s are too big, then grab a couple smaller mitsu turbos, or early volvo turbos. The point, I think, was to /not/ have external wastegates or other cost-adding measures.

Not sure about the fitment issues, but couldn't you make a spacer and slap on an FD manifold/twins setup? In theory, I know it'd work, but then we'd have a longer manifold and more spool, etc.

anyway the girlfriend is leaving and i must leave her apt then, heh. will continue later.
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Old Jan 10, 2004 | 07:49 PM
  #29  
rxcyprus7's Avatar
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From: cyprus
some guy was selling a cosmo twin turbo set up for $380. I know its sequential but for the money in this example,If it could bolt on with little fabrication, It'd save a hell of a lot of many to worry about finish setting it up. Whadda you guys think?
http://www.teamfc3s.org/forum/showth...eadid=1420113b
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Old Jan 11, 2004 | 03:22 AM
  #30  
MainstreaM's Avatar
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From: Chattanooga TN
After reading this post I have come to a realization. I have two merkur t3s(.60 ar turbine,.62 on comp. set at 7 psi). Also laying around from my starion manifold is enough scrap steel to make an exhaust manifold. The old intercooler from my starion. Plus tons of exhaust pipe for ic pipes and exhaust. Cant forget the wrx BOV. And i have about 400 dollars in all of this counting what has been used for my starion. My rx is an 87 NA. So with a safc and some fuel upgrades whats stopping me. Might have to start on this when warmer weather comes.
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