Turbo on N/A engine

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Mar 10, 2009 | 07:52 PM

#26

ROTOdethMACHINE

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From: Atlanta

Quote:

Originally Posted by Aaron Cake

Nothing. It's just unnecessary for this application and slightly reduces efficiency. Sounds neat though.

See the FAQ for transmission swapping info.

The TII transmission bolts on but requires the complete TII drivetrain (see FAQ).

There's nothing really you can do to the NA transmission which is a worthwhile upgrade. All upgrades will cost much more then just going to a TII transmission.

2nd Gen RX-7s have 4 injectors; two primary, two secondary. Below about 3800 RPM and 2" of vacuum, it operates on the primary injectors only. When engine speed is higher then 3800RPM and less vacuum is being drawn then 2" (WOT, boost, etc.) then the primaries are ramped down a bit and the secondaries are bought in. The car is no being fuelled by 4 injectors. As fuel requirements increase, all injectors ramp up.

With a small and fast spooling turbo, you will want to bring in the secondaries sooner.

Alright then. gettin there, now i just gotta do the hard part. buy the ****** parts.

Mar 10, 2009 | 07:57 PM

#27

ROTOdethMACHINE

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From: Atlanta

Quote:

Originally Posted by Aaron Cake

Alright then. gettin there, now i just gotta do the hard part. buy the ****** parts.

Certainly. But you need to also install:
-TII flywheel, clutch, pressure plate
-TII slave cylinder
-TII starter
-TII driveshaft, differential, axels
-Adapt the wiring.

So the turbo clutch and pressure plate, and driveshaft, can i buy an aftermarket LSD?

Mar 11, 2009 | 10:01 AM

#28

Aaron Cake

Engine, Not Motor

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From: London, Ontario, Canada

Unless you are track driving the car, use the stock differential.

Mar 11, 2009 | 12:26 PM

#29

iceblue

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Joined: Feb 2005

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From: Scotland, USA

Quote:

Originally Posted by ROTOdethMACHINE

I keep hearing it's better to just get a TII and swap...

What problems would I encounter if did everything necessary on the NA engine

Aluminum flywheel, upgrade clutch and pressure plate, new manifolds, Rear end, wastegate, ECU, Apex Seals, FMI, Turbo Timer, Boost Controller, Axles and so on?

Many questions and advice have already been given to you by Aaron. Most all builders will agree the TII swap is easier and less costly as well not to mention it gives you a pre tuned system to work with. I prefer going with the method of custom manifolds bringing the turbo up in front of the UIM using a 3in exhaust all the way and 2.5in IC piping. The turbo should have a 1.0+ hotside and the turbine should match ur target operating range a 60trim is a good choice in most applications. Anything you do here is going to put the motor in the 300range.

Quote:

Originally Posted by ROTOdethMACHINE

From what i've been told by a friend the 6port engine if boosted gets better high end torque

TQ is irrelevant it will also always be less then HP above 5252 anyways.