mjm4jc

I thought about turbocharging my SE, but don't have the money right now to install a full-blown aftermarket system. Currently I am using the stock S5 NA intake on my SE. I was looking for a thread for the TII intake install, but couldn't find any. There is an S5 turbo on a 12A thread and a bunch of TII engines swaps. I know that it's not rocket science to install the TII intake on the SE but there are some mods that have to be done. I was hoping to find a thread on this. Anyway, is it possible to do this swap without going stand-alone ECU? I could swap my TPS sensor over to the TII intake. I'm only running the two stock SE injectors. How far will they take me?

Starfox07

Well going from a 4 port intake (TII) to a 6 port engine (SE) is going to provide some issues.

bumpstart

ignoring the obviously custom plenum and TB flange in this example

you need to fill up the front casting holes in the manifold
have it faced off
then mark out the 6p template and die grind through


note the extra hole for a manifold bolt between primary runners
s4 and s5 NA will have this,, GSL-SE would require either it welded or tapped and blinded

PS
if building an engine for this ,, i will merge the aux and secondary inlet runners on the block slightly where this manifolds meets to clean up the airflow a little

renns

An adapter plate can be fabricated to assist in port-matching the 4-port intake to 6-port block.

https://www.rx7club.com/showpost.php...05&postcount=9

Directfreak

iTrader: (2)

Please don't take this the wrong way - I am actually
trying to help here. Ok, Here goes.

• You need Turbo ECU to run a Turbo engine.
• You need at least four injectors to do it right.
• You cannot bolt a TII intake onto a stock 6 port block. Ports wont line up.
• You cannot bolt a 6 port intake onto a stock TII block. Ports wont line up.

Whatever you think it's going to cost, double that number and multiply by three.

A Budget Turbo system will suck, you will break the engine, and then you will say "Rotary Engines suck" and "are unreliable".

You only have a few options to turbocharge your current 6 port GSL-SE.

1) Original Cartek Turbo kit (Like PJR’s beautiful setup)
(rare as hell, as they were made over 25 years ago)

2) Get 2nd Gen 6 port intake (for the additional two injectors)
a custom exhaust Manifold made to keep a turbocharger
away from the 6 port intake, And a Tuned AIC to control
the secondary injectors, or a stand alone ECU.

3) Remove the stock intake and get a blow-through carburator
setup.

If you HAVE TO do it this way, then
Check the 2nd Gen Section, alot of guys atempt to turbocharge
their 6 port engines, to varying degrees of success. Specifically
look up AaronCake's posts.

Personally I recommend that you don't attempt this kind
of Hybrid swap at all.

Just by your original post it seems that you have to do some
brushing up on Turbocharged Rotaries.

When you finally decide to do it right, You will see that an engine designed
and made for boost will run better than one that isnt.

Good Luck.

3rd and final 7

iTrader: (9)

Ive turbo'd a 6port, i got a GSL-SE with an 88 na swap thats including the iecu coil afm everything.

then i got the bright idea to throw a turbo on it heres what ive done

walbro 255 fuel pump
raising rate fuel pressure regulator
Tii imtake port matched to 6port
Tii rtek 2.1 (use to have rtek 1.5)
4 gslse fuel injectors
tii turbo
tubular turbo mani
turbo AFM



im still tuning under boost and im almost fully tuned while crusing and accelerating. it can be done if you take your time and do it right

Keith13b

iTrader: (6)

My first instinct is to agree with Directfreak; however, it can be done - just not a simple task. The easier route is to just do a TII swap. Plenty of info and it has been done time and time again. Honestly - this will be your cheapest route as the complete engine/tranny can be had for less than $1200 then just add the extra goodies. Once you break away from the traditional route by going on your own, things will break, you will F' up a manifold, etc. And the sound of $$ falling out of your bank account will be deafening! TRUST ME (US)!!!!!

But, doing it the hard way can be very rewarding if you are successful. If you have the time, patience, and $$, go the frankenstein route. Just take plenty of notes and photos, post your progress, and hopefully you can make a write up on how to do it.

If you want a challenging hobby go for it. If you want a fast FB - just do a correct swap. Pretty basic logic............my .02 cents. Good luck either way!

Directfreak

iTrader: (2)

http://web.archive.org/web/200502050..._manifolds.htm

MeCalledEvan

iTrader: (2)

This may be of help if you've got the 88 na motor.

http://www.aaroncake.net/rx-7/naturbo.htm

mjm4jc

This is what I love about his forum----learning in community. Seeking advice is humbling, yet rewarding. I think after reading all the posts, I will not press forward with my original intentions. I think the TII engine, ECU, and tranny swap is the best option. I'm sure I can handle this, since I have already put an S5 intake and tranny on my SE with no problems.

Directfreak-----I was mad at you at first for crushing my spirts (ha,ha), but all kidding aside, I appreciate your wisdom. I do think that just installing the intake is not as bad as it seems, and I can pull it off. But it's probably not worth the headache.

Thanks to everyone,

Mike

mjm4jc

Ok guys, if you had a choice between the S4 or S5 TII swap, which one would it be? I know there's not much difference, but perhaps one is a better choice for reasons unknown to me----------clearance issues because of different intakes?

Doesn't the S4 TII only have one TPS, whereas the S5 has two?

81WideMariah

iTrader: (8)

go with the S4..... it is infinitely easier to wire up... and the only major benefit of the S5 engine is the lack of a flapper in the turbo manifold.... which can be removed from the S4 or swap to an S5 manifold.

Directfreak

iTrader: (2)

Only if using the stock Mazda ECU. If he goes stand alone, then
there no real differences. Especially if he runs pre-mix.

S4 Turbo engine has low compression rotors, and they are very heavy. Safe for high boost, sluggish off boost, and really crappy fuel economy. As you stated, the stock S5 Turbocharger is much more superior to the S4 one.

Also, I believe the S5 engines had more "meat" around the dowel pin areas, similar to the REW motors, making them more likely to survive. Many High HP combos are S5 engines with S4 Rotors, for mucho boosto.

S4 TII Tranny is easier to mount because it's flat cradle, as opposed the "V" style of the S5.

MTheoryInc

iTrader: (3)

-Port match t2 intake for se block.
-Use t2 turbo and manifold. (grind big chunk off se block to fit manifold and port wastegate)
-Run stock se computer as is with MAF on the turbo comp inlet.
-Use the Haltech F5 Additional Injector Controller for the secondary injectors on the t2 intake. (I think rx7.com still has them and no laptop needed)
-Run RB 2.5 inch downpipe, use midpipe and muffler that you like.
-Use stock top mount I.C. and remount it in front of your rad.
-Dont use a boost controller.
-Lock distributor or track down a 12a turbo one.
-Get a fuel pump like this http://www.msdfuelinjection.com/fuel/2225_big.jpg
and run it in parallel with your stock pump.

This setup if done with care can be reliable and make @ or over 200 rwhp with parts listed.

mjm4jc

In light of these difference that you mention, if it were "YOUR" choice, which would you choose? Keep in mind that I probably would someday change from stock ECU to standalone and big, aftermarket turbo. I do not use an OMP. I would imagine the to simplify things, if I go with the S5 TII, I could use the TII S4 tranny. I don't think there is anything different internally, is there?

Keith13b

iTrader: (6)

I "read" that the S4 tranny is easier to mount....but I have no first hand experience.

To answer your question - in the grand scheme of things, it doesn't really matter about S4 or S5. S4 has lower compression rotors and an easier to mout tranny. S5 has things like the alluminum water pump housing and thicker areas around the dowel pins. Your biggest concern should be which motor has better compression (i.e nicer housings) and what fits your budget.

Directfreak

iTrader: (2)

AFAIK, The S4 and S5 trannies are the same internally. Even the S5 Transmission can be used, it's just a little more work than the S4. The S4 one is just practically a bolt in, (As long as you change the shifter section of the Tranny to the FB one) - All I had to do was oval out the mounting holes a little wider.

I am not going to even pretend that I know about using the stock ECU on the engine. I do know that the S5 ECU is much more "intelligent" and monitors the OMP for use, making it very difficult to remove in its entirety. Any problems, and it goes into "limp" mode.

Most people who have tried to use the stock S5 ECU eventually give up and go stand alone.

However, theres a few people here, like Steve84GSTII who have successfully done a full S5 Swap, along with the stock ECU with emissions and everything. He has a beautiful widebody setup that is just amazing.

I would do a search in his name, and check the archives, as I I am pretty sure the wiring pin outs for a TII swap have been posted.

Good Luck.

arghx

iTrader: (3)

with an s5 ECU the limp mode can be eliminated even with the cheaper s5 Rtek chips

http://www.digitaltuning.com/index.p...age=1&ecu=S5T2