hiroichi1515

iTrader: (17)

Hey, I am in serious need of advice. I have no idea if this will work. Some one told me that it would with small modifications, but I would like to get a good answer before I end up wasting my money. I am about to purchase s4 TII irons, front cover, and all other accessories, and a disassembled s4 Na motor. I am wondering if I could use the TII irons and front cover and still assemble the motor using the NA internals and housings. What modifications would I need to make to get the motor assembled? Also, if I am able to assemble the motor, do I use a the flywheel for the NA or the turbo, are they interchangeable? Everything is going to be from a 88 model.

Thanks in advance for all your help. I am making the purchase in about 8 hours so I welcome all advice.

Thanks again

Howru

iTrader: (25)

N/A and TII flywheels are different sizes. Whatever tranny you're using determines the flywheel (N/A tranny -> N/A flywheel).

Then the flywheel has to match the internals you use -- S4 stuff, use an S4 flywheel.

The N/A rotors can be used, but keep in mind they have a higher compression ratio than TII's (9.4 vs 8.5).

I'm pretty sure you can use N/A housings with the TII irons. You'll have to find a place to drill out the coolant passage for the stock turbo on the front rotor housing and swap the exhaust sleeves into the N/A housings. I hope someone pops in and can confirm this.

Good luck with the purchase.

yudaya

ive heard the same thing, but if you use na rotors (i could be off a bit) you have to use an NA front counter weight with na flywheel, you can use the na housings but they have exhaust baffles im not too positive what kinda effect they cause when using a turbo with them but you can just get your coolant source for your turbo like i was going to, the coolant hose to the throttle body can be used for the turbo and returned back to behind the water pump(basicly the collant throttle body bypass mod but putting a turbo in line instead of either blocking it off or running it straight to waterpump housing.

i also see your in texas , i do a small amount of porting, you can just have the na exhaust sleeve baffles cut out, its a bitch because of the material they are made off but if you dont have the resources to get t2 housing then you can do it that way.you should get a t2 oil pump though

nitronatefc

iTrader: (2)

Bear in mind there is no stock ecu to control a turbo motor with that high of a compression ratio. You will need an aftermarket EMS, and a good tuner. Tuning a high compression turbo rotary engine is risky in unskilled hands, unless your running very low boost. And if you want to run very low boost, just use a stock turbo engine and save yourself the cash.

2_3D_SC

I put a very similar combo together as the OP is considering:
S4 NA F&R Irons-Street port
S4 T Int. Iron-Stock port
S4 NA rotors
S4 NA Front Counter Weight
S5 T housings
S4 T LIM ported to match
S4 T UIM
S5 Hybrid Turbo-Ported WG
S4 T Flywheel
Stock ECU
550cc pri, inj.
680cc sec. inj.
S4 TMIC
Racing Beat Turbo-back Exhaust
LM1 WBO2
240RWHP @ 9psi

AFR has never gone above 11.3

I have 3-4k miles on this combo. Including track days.

This same set-up has been run by a friend of mine for a couple of years. This includes track days and Drift events.

I should mention that this is in the Midwest not Texas.

As Yudaya mentioned the exhaust sleeves in the NA housings are the biggest drawback when using NA housings.

I have read the archives on how to remove the sleeves, but could not get them out. Instead I used a drill press and a very sharp drill bit and drilled the roll pins enough to remove the sleeves, but not too much, that way I could still remove the roll pins from the sleeves.

hiroichi1515

iTrader: (17)

Thanks for the info. I just purchased the most of the setup today, and I managed to get a complete S4 motor although it was an automatic. About my setup, I was going for low boost, more than 9 - 10lbs. I am not trying to make a beast, just giving it a little more go, and trying to enjoy my 1st turbo car. Nitro you stated it would be cheaper just to use a turbo motor, but that is my problem. I have not been able to come across one so I was gonna do another 6 port turbo. I only got the idea to use the t2 irons is because some one told me that you can not correctly port the T2 intake to the NA block. If I could get around that I would have no need for the t2 irons. This is my setup until I can afford a stand alone ems.

-s4 t2 irons (no porting)
-s4 t2 oil pump
-s4 NA housing and internals
-s4 T2 lim & uim
-s4 T2 intercooler and piping, custom pipe with blitz bov
-s4 T2 turbocharger (wastegate ported)
-Bonez 2.5" downpipe and 2.5"piping to muffler
-S4 t2 fuel rails
-550cc inectors (Primary and secondary , until I find some650s or 720s for the secondary)
-FD Twin Turbo Fuel Pump (Brand New)
-FCD
-S4 T2 Ecu
-Greddy Emanage blue with map sensor
-Greddy Profec B Boost controller

My goal is between 230hp and 250hp. Once I am able to afford a microtech or haltech, I will think about getting a serious turbo and adding some real boost.

Also I know most of you if not all will say the emanage is a POS, but it is all I can do right now. I know with the downpipe i wont be able to keep boost down to the minimum so I want to use the emanage for some kind of insurance if any from the ecu.