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Index > Engine/Drivetrain > Thread: cosmo 13b tt in repu ?
Thread: cosmo 13b tt in repu ?
rxkevin


1st Gear
Posts: 45
posted November 12, 2005 09:35 PM

cosmo 13b tt in repu ?

I am seriously thinking about doing a cosmo twin turbo swap with the auto and stock ecu and I was just wondering if any one else has done this project before?
____________
1984 RX-7 with 1993 13b rew drive train, t-66, power fc.
1974 REPU dellorto, racing beat header, 3 spd auto

       
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wankelbro


Newbie
Posts: 9
posted May 23, 2006 07:14 AM

Twins for REPU

I am using a Turbo II 5 speed trany and microtech . Is not quite done but I can not wait

       
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Tom93R1


Redlining
Posts: 458
posted May 23, 2006 02:09 PM

I think you will have a hard time fitting the twins, there will not be much room for a downpipe without cutting into the shock tower.
____________


'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!

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wankelbro


Newbie
Posts: 9
posted May 23, 2006 02:24 PM

Twins

It fit perfect without cutting anything . I am using the downpipe form the twins . I really do not want to cut anything . Thank You

Norman

       
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Tom93R1


Redlining
Posts: 458
posted May 23, 2006 04:29 PM

Thats cool, I may have to think up something to do with my spare set of twins laying around then.
____________


'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!

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wankelbro


Newbie
Posts: 9
posted May 23, 2006 05:27 PM

Twins

give me a couple of months I will be happy to email you Pics ..

       
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RotaryRob


Revvin Up
Posts: 53
posted June 06, 2006 11:07 AM

Twins?

Hey Guys,

Just curious that you keep referring to your "twin" turbo'd engines. Are these Mazda units? Mazda never made any "twin" turbos that I know of. Please update me. All the turbo'd engines I know of from Mazda, such as the FD series Rx7, had DUAL turbochargers. One was small and spooled up quickly, while the other was bigger and provided boost at the higher revs. There were two of them, but they definitely weren't twins! Even the single turbocharger 'Turbo II' engine used that concept with a dual scroll compressor vane with different pitches and exhaust manifold valving that shifted the exhaust gases from the more accute angle to the lesser as the revs increased. Is there really a 'twin' unit from Japan or something that I don't know about?

____________
'77 RPU
'75 RPU (V-6)
'76 Courier
Rotary Sprite (3 - 2 project)
'85 IT 7
EP '85 Rx7 (in progress)
'85 GSLSE (4)
C6 Corvette Roadster

       
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tom93r1


Redlining
Posts: 458
posted June 06, 2006 11:19 AM

The turbos in the 3rd generation (FD) rx7 and cosmo cars are indeed "twin turbos". They are identical size to each other but they operate in a sequential manner by using a very complex vaccuum hose and solenoid operated control system. I guess you could be more technically correct if you called it a twin sequentially turbocharged system.

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xp882


Redlining
Posts: 294
posted June 06, 2006 09:49 PM

how you guys runing your front mount intercoolers? cutting holes?
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wankelbro


Newbie
Posts: 9
posted June 07, 2006 07:27 AM

Intercooler

I am running water to air intercooler .It makes it easier to install .

       
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admin


Administrator
Posts: 444
posted June 07, 2006 10:44 AM

Cut the fenders

It really hurt to do, but I cut the front inner fender...

I figured if some future owner ever wanted to go back to stock (?!) they could weld the holes back up.

It was better than cutting the hood... and less weight than using an air to water IC.
____________
I'm The Admin, thats why!

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xp882


Redlining
Posts: 294
posted June 07, 2006 08:04 PM

ouch... have picture of air water installed? i need to find somewhere to do the piping for my turbo
____________


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