A little backstory:

I have a 88 NA parts car.
A 85 GSL SE with a dead motor.

The plan is to swap the 88`s NA motor into the 85 and then turbo it.


My question:
Emission and air pump delete on the 88`s motor. From what i can read, the 88`s NA motor is a 6 port. And it uses pressure from the emissions system to activate the valves.

So what is the proper way of doing this

Please keep in mind that the car will be driven NA for a while before the turbo setup.

Thanks!

 

all NA engines from 86-91 ( i dunno about 13b's found on sa22s) are 6 port. and you are correct, sorda. s4's (86-88) use exhaust backpressure (there is a little tube running from your catilytic con. back into the engine bay) to activate the aux actuators. s5's use pressure supplied by the air pump(although it doesnt work as well as if you do it yourself). the best way to do what you want tho is to either A) run an electric pump or B) rig your air pump to provide the pressure. both ways will be way better than the stock s4 system since they would be rpm based not load based and therefore check-able/set-able in neutral AND THEREFORE more consistent. there are literally METRIC TONS of info on this subject avail. on this forum as well as others and a pretty good writeup on both aforementioned methods can be found at www.rotaryresurrection.com

 

o, and i will say this first so that hopefully no one ese will flame you. ---USE THE SEARCH FUNCTION.--- i, myself have responded to probably three very similar questions in the last 6 months or so and i does get a little annoying (good thing i like to hear my own perverbial voice ). do a search for "aux port" or something like that or even do a search for threads ive posted in and i GARANTEE you results.

 

There is no space to keep the 5th and 6th port actuators if you boost the car, the lack of low end will be more then compensated for by the high compression and early spool. I wired mine open and it works fine. Go to Aaron Cake's website and read the write-up on boosting a 13B.

 

haha i completely forgot he was turboing it! in this case, if i were you i would just do as khan has suggested and wire them open, that way you wont be rigging up an aux port actuation system only to take it down in a few months (or whenever) when you turbo it.

also, i kno its a bit controversial, but you may wanna consider doing the version of the six port turbo that uses TII manis instead of NA manis. thats what i chose to do at least. of course this method has its downfalls too...heres a link to get you started on some ideas, if you need anything specifically answered id be glad to since this is something that isnt really covered as fully as other topics like complete TII swaps or aarons version of the 6 port turbo.

http://forum.teamfc3s.org/showthread.php?t=37694

just letting you in on some other options..

 

http://forum.teamfc3s.org/showthread.php?t=37694

 

So this really isn't about turbocharging the NA, it's about keeping the aux ports functional when swapped into a 1st gen....

Just check the FAQ. There are many options and all are covered in great detail.

 

JAPAN2LA once sold a intake manifold for a conversion from n/a to turbo. It looked really decent and was a bolt on (the manifold) without you having to do anything to it. There were pictures on this thread https://www.rx7club.com/showthread.p...light=MANIFOLD

but the pictures done gone 'way, bye, bye.

 

The pics... Not sure why they deleted them.. Anyway here they are..

I can do this on any S4 or S5 TII LIM Jspec or USDM. The USDM is $30.00 more exspensive as it take me an hour longer ( extra welding and machince work due to the EGR).

Anyway these get:
Media blasted
Aluminum Tig welded
port matched by hand
Flycut/resurfaced on a Brideport mill in a fixture

 

^^^^wow that thread has inspired me to rebuild and port the **** out of my origional 6 port. Do you still have the lim for sale japan2la?

john ny

 

Takes me about 2 days to build one up..

I will keep the price as it was before $230.00 plus paypal fees delivered. (your LIM required)

Or

if I provide the LIM (jspec type S4 or S5 only) its $270.00 plus paypal fees delivered.

I have done maybe 6 of these in the past for RX7club members and I have seen them re-sale the LIM for more than I charged to build it.. So I think the pricing is more than fair and the product comes out looking OEM!

 

That is reasonable. I will contact you after i rebuild my engine definately. Thanks.

john ny