Ok so i have been told that only a SE 13b front cover will make it possible to put a 2nd gen engine into a FB, however i am seeing here: https://www.rx7club.com/showthread.p...ale+13b+intake That a 12a front cover will work and all i need is the SE pan and pickup tube.... Is this true?

And my second question is about T2 exhaust manifolds.. I see the cast iron S5 manifolds out and about, but i hear they crack alot and are getting harder to come by.. I also see that there are stainless "custom" ones being sold as well... Which is the better set up to run.. I know they run hot, very hot, but is that too much for the stainless, or is there a flow issue with those- i know that with headers the tubes must be the same lenght, is that an issue with these as well?

What are your thoughts on the difference between the two, for or against? Why?


THANKS!

 

For question 1, it is true. A 12A cover will work fine. The advantage of using the SE cover is you can use an SE or S4 OMP which has the 4 OMP lines that are typically used on the EFI 13B engines.

BTW: I got my MS and PhD at OSU. Go Beavs!

 

I will be running a carb set up and premix, so does it matter at all then? Thanks!.....I think you would like the color of my catalina...lol

 

If you are running premix, then just go for the 12A cover. Then you just need the SE pan and pickup.

For the mounts, you have a few options:

- GSL-SE cross memeber
- 12A/13B mount from RB or Mazdatrix
- slot a 12A setup

There are some threads floating around for the different options. If you can track down some SE parts, I would install the GSL-SE fuel system (hardlines, tank, filter, and pump). Good way to make sure you have the capacity needed for the TII.

 

yeah i am upgrading to stainless lines, a new pump, and was thinking about the tank as well, as i am sure the sunding unit would be a bit nicer than my stock gsl's. Thanks!

 

Or a Respeed R&P kit.

 

So about the manifold question, i have not heard anything from anyone about it. I need to know which is the best buy and why it is..

Should i get a aftermarket one like this:
http://cgi.ebay.com/ebaymotors/86-92...item2c4e554651


Or a stock s5 manifold?

 

Cast iron manifolds are generally more durable than fabricated (tubular) ones, while the fabricated manifolds generally perform better (increased flow, lighter weight). Fabricated manifolds are also generally more expensive, since it takes a lot of hand work to make and finish them properly. I made mine, and it took many hours.

I wouldn't buy a fabricated manifold off eBay. Do a search and read the horror stories.

 

The tubular headers depend a lot on the material used and the quality of the welds. Keep in mind that our exhausts tend to see hotter temperatures than most piston engines and as such the product needs to be tailored to those needs.

The material and gauge used is important, my RE Header uses 1/8" (12 Gauge if I remember right) steel tubing which probably will not get burned out anytime soon, while maybe a stainless steel could use a slightly thinner tubing. Also how well the welds are done matters as well. My RE Header has nice MiG welds that have good fusion and a proper bead which means that the weld's integrity is going to be very good.

The Ebay Headers I would be very very cautious with, make sure you can get the specs of the material used and thicknesses so you can see if it is too thin or not.

Feel free to correct me if I am wrong here, just starting to study my exhaust design as I build it so I may have some misconceptions.

 

Cool, thanks guys!


anyone got any horror storys?

 

the s5 manifolds are really durable, and are much easier to find than the s4's, the s4's occasionally do crack.

the only trouble is that the s5 manifold only fits an s5 turbo.

 

so i cant put a s5 exhaust manifold on a s4 block? **** this is good to know, i was two sec from spending a bunch on a mani!

 

You can put an S5 exhaust manifold on any 13B. But the only turbo you can attach to it is a stock S5 unit. That's what j9fd3s was saying.

 

ah. k thanks for clearing that up!