Alright first I would like to say I was planning on using the search button but its really lagging for me right now, and I have to many questions to ask so here goes nothing -

1. Is there a difference between the S4 and S5 TII's? I notice the body difference but how bad is the weight/ HP difference?

2. I always thought that the TII engines had a *im a huge dumbass with this stuff*
Turbo II piece near the back part of the engine, near the front windshield. Why am I seeing some TII's without this?

3. As an aspiring buyer I am of course looking for a TII preferably an S5. However around my area I am having some trouble (ATM) and all I can seem to find are S4 N/A's and if I do find that rare S5 its not likely to be Turbo'd (as far as im concerned I think the only TII ive seen was an 88). How bad would it be to settle for a S5 N/A and just put a Turbo (not TII engine) in it? Better or Worse?

4. What are some things I can do to improve gas mileage, besides shifting at a lower RPM.

5. Any other usfull tips will help


P.S I know whenever you see me post its with a bunch of questions, im sorry for this but I am trying to learn as much as possible

 

You can find all the stuf you need to know in the faq and specifications thread located on the top of the thread list thats labeled sticky.

 

All? Not quite such as question 3 and I am pretty sure question 2

EDIT: I stand corrected... Still question 3 is kinda specific so if anyone wants to answer that one otherwise im gonna read just about everything possible in this FAQ

EDIT 2: To be honest a lot of this doesnt make to much sense to me . So if anyone could dumb it down for me (all the motor threads, regarding the way the engine looks, in the FAQ just take you to someone having a problem with their current one, or a swap. And also how well does an aftermarket turbo in an N/A work? Better or worse than if I just got a TII?

 

Putting a turbo engine in a n/a is very costly, youre better off waiting to find a turbo2 , its alot of work to convert it to turbo so plan on working on it alot, it will also cost you quite alot of money to do the complete turbo conversion the right way, I'm talking anywhere from $1500-3000 depending on where you get all the parts.

The only way it would be worth it is if you get an n/a that is very cheap that has a blown engine or something, but you still have alot of work ahead of you.

Look on http://www.craigslist.com in your local area for rx7s , if you want one that bad you will drive whatever distance it takes to get it.

You can also look on here for rx7s too. S4TII or S5TII , it doesnt matter both have lots of potential.

Im not sure about what youre saying about the stuff saying turboII , the top mount intercooler says something to the effect of turbo or something I'm not sure. The car will usually say turbo II in front of the doors on the fenders and on the back of the car on the right side of the back bumper.

 

Turboing an na isnt the way to go if youre new to rotary engines, surely the n/a turbo will make more power with less boost because its running higher compression but then you have to get a standalone ecu, upgrade to turbo2 drivetrain (n/a tranny cant handle much over 200hp), have to upgrade your entire fuel system, do some custom fabricating , and a few other things as well.

In the end it will cost you just as much if not more than a turbo2, but if money is not an object and you really enjoy working on cars then go for it but I am strongly suggesting you just get a TurboII if you want a turbo car.

Tuning is very critical on turbo n/a and turbo as well, one knock and your engine can be blown, so make sure you read up.

You know you can search the forum with the search button ? There are lots of threads about n/a turbo and stuff like that.

Aaron Cake has a writeup on his site about turboing n/a , hes a mod on this site and knows alot about it , if you want some good info on turboing n/a then read up on this link.

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

 

S4 stock Turbo II: 185 HP
S5 stock Turbo II: 200 HP
Weight difference is negligible really.

Stock numbers. Not a lot actually around that are close to that, most have a lot of mods that push those numbers up a little, or are stock systems not running as good as they used to, pushing them down a bit.

If you're new to rotaries I suggest an NA. You may encounter problems that you'll not be sure how to address with an entirely different engine. Also teaches you good habits, ie a lot of little maintenance and important things to consider, because an NA is a lot less fragile than a Turbo II. They're also cheaper and more plentiful.

In short, an NA to T2 is not a conversion that is easy and I, having looked into it on several occassions, would definitely not recommend it. Just be sure you want a T2 (or maybe an NA) and then specifically look for one of those. S4 NA's will be about 145 HP to 160 on an S5, just FYI.

Good luck! Btw, here's an excellent link to a site done by RETed I believe (one of the 2nd gen pros around here)

http://fc3spro.com/TECH/tech.html

 

S4 is 182hp.

Here's how I remember: S5 is 10% more than S4.

 

Alright guys tyvm for the help most the of links you gave I have looked into, after actually reading Aaron's N/A -> Turbo write-up it looks very time consuming and like a lot of work. I will just keep my eyes out for a TII

BTW my dad has a friend who races rotaries and his son has an FC (I would talk to them but they are always busy) so of course I will have one of them by my side when going to check one out, or when something goes wrong

Also to those who suggest getting an N/A first, I was going to do that but I realised that it wasn't worth upgrading later (because I know I'll want to) seeing as TII's are already hard to find, imagine once I have an N/A and want to sell it for a TII that'd be a hassle.

 

So where in GA you from ? I know another guy in Georgia that drifts his FC in Barnesville at the drift track there.

 

Im in Woodstock, O wow I didnt notice you are from GA :P. Hey if you see any cars in sale for GA send me a PM S5 TII preferably

P.S. By races I mean drags And I think he drags an FD.

P.S.S I see a 88 AE for 2500 but its auto... Whats the auto- 5spd swap cost? For the parts at least? I just bumped up a really old thread but hey why not ask twice :P

 

Im not sure how much it would cost, you would need to swap the pedal from yours to one with a clutch which would prolly be a pain.

Most of the cost would come from the cost of the transmission $150-300 , Clutch slave $40 new, new stock clutch $150, used flywheel $30, new throwout bearing $40 , clutch pedal assembly $25 used, new rear counterweight $50

So in all youre looking at roughly $585-635+ just to do the swap , thats just a rough estimate. If you get prices on everything cheap you could do it for as little as $300 or less, but youll have to do all the work yourself.

I can look out for a turbo2 for you, I wouldnt rule out a s4TII just because theyre lower hp and all doesnt mean a thing, theyre only lower hp because they run lower boost and lower compression, surely the turbo setup on the s5 has more potential but both cars stock vs stock are pretty much even.

 

So with minimal tunning I could run a S4 TII as well or better than an S5?

 

Yes you can definitely run as well or better, theres really no limit on what you can do to your car if you have the money to do it.

A member J-Rat on here is running stock ported S4 T2 engine and is running 490whp and running 11.1 in the 1/4 mile, so what do you think ? His is not minimally tuned though, he is running quite alot of mods.

Minimally tuned you can get 200 hp easily in an S4T2, all you really need is a catback exhaust, fuel cut defender, and boost controller and a few other things mentioned on the link below and youll pretty much be there. Im not sure if youll need an upgraded BOV running more boost or if youll need anything else, stock boost on s4 5.5 psi, so you could be running 7-8 psi with those mods and 200hp.

http://fc3spro.com/TECH/FM2W/power.htm

 

Yeah. And you'll have an easier time finding an inexpensive s4 tII. Like the others have been saying, there's not too much of a difference, and either will be a hell of a fun drive. Also, you can add boost in the s4 tII and run similar to an s5.

Personally, though, I think that the rotary is a hard enough switch when you're changing from a piston engine that you may want to stick with an s5 n/a just for the simplicity of it. You may thank yourself for it later. You can always sell the car and switch to a tII once you have some rotary experience.

 

I definitely agree with you on that, rotary engines are alot of fun but turbo2 motors are much more fragile than n/a motors to owners who are new to them.

If you do decide to buy turbo2 you need to make sure you read up alot on it before you do any mods and things like that.

I have a friend who had a t2 and blew his engine from making a stupid decision of tuning all the low rpms on his safc (fuel controller) all the way down on the initial installation , he was like "its running good waters coming out the exhaust", and his engine blew up within 6 months with not very high mileage on the rebuilt motor (15,000 or less).

Basically what Im saying is having an rx7 is like having a kid in a way , because yuo need to take very good care of it and take pride in taking care of it , if you dont take care of it properly youll end up with a blown engine and on turbo rotary there are more ways you can blow it than on a na.

 

"You can always sell the car and switch to a tII once you have some rotary experience."

With the rarity of any TII in my area, im gonna say that is doubtful I don't see the point in saving a hassle and skipping a step, I skip steps when I run up stairs taking the other one is just tiring and not worth the time :P:

 

I saw a turbo2 1988 that was clean and fixed up in atlanta go for $2000 and thats it so you can definitely find one you just have to stay on top of things and make sure you keep looking and youre the first one there when you do find one with cash in hand, because if you dont have cash in hand and someone else comes along it can be gone when you come back even in the same day or the same hour for that matter.

I'll keep a lookout for you though, but you might have to wait awhile before one turns up especially one turning up thats a good price and clean.
Florida usually has some turbo2s for sale if youre willing to make the drive.

 

Not quite correct... I made 437 out of my stockport, then went to a streetport and got to 490. I am definitely NOT on a stockport anymore..

 

well even at stock port 437hp at the wheels is quite alot of power for stock port, given 15% hp loss through drivetrain would mean you are making 514 hp at the flywheel, which is alot of power for stock ports.


With the streeported motor you had 490whp which using the same formula comes out to 576 hp at the flywheel approximately.

Doing calculations the streetport gave you about 12% more hp over the stock ports compared to the last dyno.

So you are making almost as much power to the wheels right now as you were making to the flywheel last dyno before the port.

 

Yeah, but I ran out of turbo....

 

Yeah u need to upgrade that now, I guess it didnt have much more power to put out if it maxed out with only another 62 more hp.

I'll look forward to seeing what turbo you are putting on next.

 

Well, turbos and flow are more complicated then that.