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

10th AE twin turbo on 13b-t, NOT 13b-REW!

Old Apr 5, 2004 | 06:13 PM
  #26  
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if you pull this off, youll be running so high hp, I mean, it would be around 300, right? and that is all a RX-7 ned in my oppinion...things are quick-BRUM!! haha, but yea you'll burn everything in your local street-gangs =P
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Old Apr 5, 2004 | 06:27 PM
  #27  
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The problem with running a valve that closes off one turbo on the low end is that there is no way to get it spinning up to speed when the valve opens. This would cause a pretty severe problem when it came online as it would take time to get moving while the other turbo slowed down. You'd lose boost at the transition point. This was one reason why the 3rd gen system is so complicated. It has a pre-spin mode where some air is diverted to get the second turbo spinning. If you really want to try this system with 2 single turbos, just copy the way the 3rd gen system works as far as valves and vacuum lines goes. I bet you'll get frustrated long before you get it working though. You're my hero if you do make it work good though.
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Old Apr 5, 2004 | 06:41 PM
  #28  
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Originally posted by Hagakura
if you pull this off, youll be running so high hp, I mean, it would be around 300, right? and that is all a RX-7 ned in my oppinion...things are quick-BRUM!! haha, but yea you'll burn everything in your local street-gangs =P
300rwhp? thats all? I would hope to God that he'd get at somewhere around 400-450.

IMO, I think this is a crazy amibitious idea. The stock FC turbos are much too large for a twin turbo setup. You'll need the custom manifold and on top of that, think of the positioning of the downpipe. I don't want to think about it.

It would probably be much cheaper and FAR less hassle to just order the twin turbo setup from Knights Sports. I believe its around $3500-4000.

Kevin
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Old Apr 5, 2004 | 06:50 PM
  #29  
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To be honest I know next to nothing about turbos, so I'll ask, rather than suggest, what would happen if you were to use that custom twin turbo manifold, but have one turbo bigger than the other? Would this somehow allow the smaller turbo to spool faster (I'm assuming here), then later on spool up the larger? Like I said I know next to nothing about turbos.
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Old Apr 5, 2004 | 06:53 PM
  #30  
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Originally posted by Atticus
To be honest I know next to nothing about turbos, so I'll ask, rather than suggest, what would happen if you were to use that custom twin turbo manifold, but have one turbo bigger than the other? Would this somehow allow the smaller turbo to spool faster (I'm assuming here), then later on spool up the larger? Like I said I know next to nothing about turbos.
That is what the FD has, if I'm not mistaken. The first turbo spools really quickly too.
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Old Apr 5, 2004 | 07:02 PM
  #31  
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Originally posted by rotarygod
If you really want to try this system with 2 single turbos, just copy the way the 3rd gen system works as far as valves and vacuum lines goes.
The single biggest problem with that is going to be controlling it. The FD uses four separate vacuum solenoid-controlled valves to control the sequential operation (plus another for wastegate control) based on load and revs, and there's simply no aftermarket ECU that's going to be able to do that.

He should give up on sequential. Think simultaneous...
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Old Apr 5, 2004 | 07:11 PM
  #32  
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Originally posted by eViLRotor
That is what the FD has, if I'm not mistaken. The first turbo spools really quickly too.
Ha! Well then. Atleast I wasn't as wrong as I thought I'd be.
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Old Apr 5, 2004 | 07:16 PM
  #33  
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Originally posted by NZConvertible
The single biggest problem with that is going to be controlling it. The FD uses four separate vacuum solenoid-controlled valves to control the sequential operation (plus another for wastegate control) based on load and revs, and there's simply no aftermarket ECU that's going to be able to do that.

He should give up on sequential. Think simultaneous...
Yeah I was thinking the same thing. I would think anyone crazy enough to actually build all that in though would also be brave enough to make it work. I'll just stick to one turbo.
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Old Apr 6, 2004 | 04:46 PM
  #34  
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Yeah i don'tr think you'll be running the stock ecu on this so ditching the AMF is no problem so i wouldn't even think about using it when you can use a MAP sensor
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Old Apr 6, 2004 | 06:28 PM
  #35  
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Re: 10th AE twin turbo on 13b-t, NOT 13b-REW!

Originally posted by fusion-turbo
Hey guys, i am attemting a conversion of a normal 88' 13b-t motor (ported and rebuilt) to handle a twin turbo setup (using two of the stock turbos).Has anybody attempted something like this before?
Oh yeah it's been attempted before!
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