I am currently working on my 6 port turbo conversion project and I was wondering which would be better...

Keep the 6 port sleeves, put pineapple racing inserts in, and wire them open.

or

Remove the sleeves and actuator rods

Since it will be turbo'd, which would be better for flow?

 

What are your plans for your fc?

 

Get rid of them. You don't want them. I also asked that question. I thought i would be good to keep them in because it would direct the air flow and fuel in to the engine. But supposely it won't work.

 

this depends
sleeves would be better for your low end, but worse for your top end
and vice versa

we need aaroncake in here

he'll tell you whats up

 

I'm not saying not to get him but I believe he has already answered that question for me.

Put it like this If you going to do the 6 port turbo and used sleeves you are going to have to use the actual n/a manifold and not the T2 6 port moded manifold.

That means doing everything that aaron cake did in his 6 port build. It would be easier to use the Lower T2 moded 6 port manifold so you don't have to do all that modification.

Also why would you want something in the intake knowing that your force air into the engine. If you don't believe I have a big talk with a bunch of guys over it.

2nd Page and I was wrong about aaron cake saying that.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/s5-6-port-turbo-question-697598/page2/

 

also,and its just my opinion,if 6 port worked for turbos they would have made the t2 with them...i say take them out

 

the actuators for the 5th & 6th ports are in the way of the turbo so the sleeves have to go.

Ramses666

 

^^ that is a true story... haha didn't think of that. (What azdk said)

 

I think i'll take em out but i was just curious if somebody had a compelling reason to leave them in.

 

No prob if you have any more questions. I bet anyone on the forum is willing tell help.

 

Remove them and all related hardware. I've done a good bit of testing leaving them functional, removing them, and with sleeves. Removing is the best solution.

 

If you're using the t2 LIM tkae out the sleeves. They'll just be in the way. If you're still using the N/A LIM then hook up som remote actuator and an rpm swith to open them. It's nice to be able to start uphill without having to ride the clutch!(speaking form experience!)

 

Oh ya I should've mentioned that, i'm using the stock NA intake manifolds, LIM and everything. So this will make turbo placement...tricky.

 

The real question is, how big is your turbo?

With a smallish turbo, the loss in low end under high throttles will be nonexistent. You certainly WILL notice it under low throttle but a lot of people don't seem to have issues with this. (I find it dreadfully annoying).

If you have a larger turbo which may exhibit some "lag", then the ideal situation is to try and preserve as much low end velocity as possible which means keeping the system working. Obviously this means a lot of custom work which most people aren't prepared to do.

The next engine I build for myself will be for my Cosmo and will be a 6 port turbo with fully functional ports running a GT30R.

So basically, it depends.

From a fabrication point of view, it's easiest to wire them open or remove the sleeves. If you are using the TII lower intake, this is your only choice.

 

How do you plan on operating the ports, Aaron? I always thought it would be cool to have them open when ever the turbo puts out positive pressure.

 

Yeah now i think aaron you should make the t2 lower manifold with the 6 port mods but the tricky part is make the 6 port actuators and I would buy that.

 

Same way they are opened stock, via exhaust backpressure.

Alternately, via a small servo controlled by the ECU.

I will probably go with the 2nd option since it will allow me to tune the RPM/pressure when the ports open to best suite the characteristics of the turbo and car.

It would require designing a completely different casting and remote mounting the actuators. I could certainly produce them but in such low quantities they would be over $1000 each.

If you want to run the aux ports, either use the NA upper intake or make an adapter to connect the TII upper to the NA lower.

Either way it means you need to make an exhaust manifold to move the turbo out of the way of all that hardware and remote mount the actuators.

 

Ok so I removed my 6 port sleeves, actuator rods and mounting hardware because during initial test fitting of the turbo, the mounting studs interfered with the compressor housing. Then when I re-installed the LIM and test fitted the turbo again, the compressor wasn't even close to the actuator studs, so i don't know why my first test fit was so far off.

Anyways I finished my turbo spacer and now the turbo is happily situated between the LIM and the shock tower with no frame cutting required. The only downside to this location is that the downpipe will have to be angled at nearly 90 degrees to clear the firewall.