hi i am very new to rotory engines. i have been working on my dsm for about the past two years and finally got a loan to get a new toy since mine is always down. so i bought a 1988 rx7 covertible. the question i am getting at is i got alot of spare turbo and intercooler parts, and was wondering if the stock 14b turbo from a dsm would work on my rx7 with some modifications.

thanks chad

 

No. The turbo is way too small.

Also, see the FAQ as this question is asked 10 times a day.

 

the motor is called a 13b not a 14b. and when you turbo the stock n/a you have to watch for high compression. but you might be like Aaron cake and when you turbo the n/a it might not blow up but that also depends on many miles the engine has to.

 

no no no sorry for not clearing everything up. the turbo oon a stock dsm is called a 14b. what i was asking was that could i put one of the turbo from my parts car on the fc with a turbo manifold. and all the other turbo goodies.

 

ahaha. that was good.

clough: i dont think its a question of can you put the 14b on the rx-7, its a question of should you. see, there are plenty of write ups of different methods to turbo a non turbo rx-7; swap everything from a TII (turboed rx-7), port match the manifolds and swap just the majority of the turbo components on to your na motor, or aaron cake style, keep the 6 ports, and improvise ont eh TII equipment. and then of course, you could always find a way to put on your dsm parts, but as you can see, it would be more expensive, and not beneficial compared to the alternative. read up on the NA- turbos, good luck!

 

You could get a 1g dsm auto trans turbo. Then you'd have a 13b on a 13b.

As for you question, no. I think you want to go the other way around. Put the TII turbo and the dsm. The 14b is almost half the size of the TII turbo.

 

lack of knowledge pwns you.



DSM turbo=14b

RX7 engine=13b



BC

 

That's interesting. I've done loads of searching on this website, google searching, and many other rx7 specific websites and found very little to absolutely nothing as far as writeups or any hints as to how to properly turbo the NA FC engine. I hope I'm looking in the wrong areas, because I know that somewhere out here is some info on turning a NA into a forced induction monster.

I did, however, find aaroncake.net very informative

 

I simply don't find that possible. See attached screenshot. There are also a load of NA turbo links in the 2nd gen FAQ on this website, there are multiple topics in the Archives, both Rotary Resurrection and ReTED have TII swap writeups on their websites, it's the most talked about topic here, etc. etc.

 

most of the google links that I found were useless. They showed how to swap engines... etc.

However, I just happened to find your na turbo writeup in the archives (from 2002) and found that overwhelmingly helpful.

One thing I didn't find though. When you put that together, did you do anything with the ignition timing? I saw the aftermarket ignition box on the radiator fan shroud, but was that to retard ignition timing, or only for enhanced spark?

 

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

 

Very helpful Hailers. Thank you!

One more question! What's the reason for swapping to the TII front cover? Is it because the turbo's oil return line dumps there?

 

Yes. Turbo oil return line. It can be done other ways but to me a used turboii front cover is just so much easier and straight fwd.

I'm talking just series four cars. You'd want to buy a used series four front cover, not a series five front cover because of the omp differences.

 

I had originally planned to use the CDI box to retart igition timing, but the prospect of having to buy two more boxes for the trailing coils (as well as the Crane retard box and sensor) kind of killed that idea. Right now I just use it for a better leading spark.

Some find it easier to swap the front cover, some find it easier to pull the oil pan and weld in a bung. I'm of the opinion that since the pan has to come off to pull the front cover, you may as well just modify the pan (and replace both engine mounts while you're at it, as well as fix the leaking pan gasket).

 

thanks alot for all the posts i seriously look it to it. how much is a tII motor go for now-a-days.

 

....or tap the front cover....

 

Ah haaa... very interesting! That's what I was thinking, Mandrake. I just didn't come outright and say it.

Thanks for all your awesome help guys. Aaron, I've asked the ignition question a number of times on different forums, and found no answer. I figured that because the car has 3 separate coils that I'd have to buy 3 separate ignition boxes for them. I suppose that all you have to do is add the proper amount of fuel at the right octane and you won't have to retard the spark to prevent pre-ignition.


If done right, the oil pan doesn't have to come off if you want to remove the front cover. It will seal perfectly fine if you can make a properly-made paper gasket to fit the bottom and use silicone in the corners where the pan meets the block and front cover. Unless your oil pan is already leaking.... in which case it should be removed. I've done this on enough fords by now that it's a mastered art

 

Pulling the front cover without replacing the oil pan gasket is not "right". I don't know about you, but I don't like oil leaks. The 2nd gen oil pan is always a nighmare to seal and stuff like this doesn't help.