Well I got these housings for cheap, no chromeflaking, perfectly straight and no crack at the sparkplugs.

I want to use them for my 12A blowthrough set-up, will it work, help a noob out

 

Quick answer, no.

12a plates with 13b 1st gen housings yes.

 

But how bout' them 12A rotors ?

 

You need 13B rotors with 13B housings.

 

13b engine rotor housings 80mm wide
12a engine rotor housings 70mm wide
12a rotors 70mm wide

quick answer no

BUT

A guy here machines 12a irons he makes the oring groove on them so you can use 13b housings.

 

Are you sure?







































Just ******' with you guys.
Cheap-*** mod of the day =



Had some fun with the Bridgeport CNC mill today


Ha ha I thought the o-ring grooves was a dead give-away.
I'll go sit in my corner now

 

get some 2nd gen plates and GSLSE oil pan. use the 12a or SE front cover and youre good to go.

youll need a 13b rotating assembly though.

 

you have access to a CNC machine?????????????

I hate you Kim....

(envy, pure envy)

 

Yo Those Are Not "fd" Housings. Bro- Those Are 84-85 13b Housings Patna And You Cant Make Them Fit On A 12a Because The Only Thing U Can Use From A 12a For This Is The Plates Only. Other Than That Its Still A 13b

 

That's very disturbing. Good luck with it.

 

How come that be disturbing, insight please

Kim

 

Well, thats interesting.... haha

 

Holy ****, that's impressive. I'd like to see how it all comes together (if I can, I've never heard of doing that before), what is the benefit of the FD housings?

 

XD wait so you decided to machine the 13B housing down to 12A specs so you can have replacement housings?

Okay then I am gonna start laughing with amusement and be watching you to see how your crazy plan works out! ^.^ Brilliant! pure evil genius material here!

 

i'll be watching for updates on this, too. i'm particularly interested in apex seal life (exhaust port support makes me uneasy).

good luck with it though.


EDIT: actually, i take that back. i guess i've probably done some of my streetport 12A exhaust that wide ...

i still want to see updates when you put it together.

 

Ha, I knew this would stir things up a bit.

Primary reason is: I had a hard time finding 12A housings that had no chrome flakeing, I am cheap like noone else, new 12A housings are wicked expensive overhere.

Secondary: Hey I saved an otherless scrap FD housing from the junkyard, these housings had some chromeflaking to begin with, but it does'nt matter since that part was ground away anyways.

I will update this thread when possible, got most parts right now to finish the build, but i'm also helping a friend out, building an endwall for his shop.
Have patience, grasshoppers

 

Interestingly insane idea. Good luck with it.

 

Why not just build a 13B instead?

 

I had heard the 12A housings were becoming more difficult to find in good condition. Would this be worth pursuing for anyone without access to sweet sweet machinery ? Or is only a good deal for you, you lucky lucky bastard

 

Since when do FD engines have the water seal grooves in the rotor housings?
They look like 70's or GSL-SE rotor housings to me..........


Never mind......my fault for not reading the whole thing!

 

Cam at Pettit racing used to do this for race cars that required 12As. The exhaust ports are also much wider unported than 12A ports, like a freebie port, and I think the spark plug timing might be different.

 

Well, I could, I have all the parts for it, even a set of MFR P-port housings, so fun is just laying around my shop waiting to be plugged into a car

The thing is that when I've set my mind on something, It usually gets done sooner or later, usually later ha ha. Some time ago I saw a 12A blowthrough that Robert RotaryShack made, I'll admit that it tickled my interest to try the whole turbo thing.
I've allways been an N/A guy since my 86' GXL, homemade peripheral port 13B racecar[another thing I just had to try out, got two mfr housings that i copied timing off) to my S4 6-port FB.
Then one day I saw the light when I tried OC94Rx7's beautiful FD, boost is addictive like a drug, Roberts red turbomachine sealed the deal for me.

 

regrinding 13b housings to the same width as a 12a ones has been around a while now in Australia without any problems...i'll try to get some more info

 

ok,weird,really weird.

But very interesting none the less.

Would like to see how it ends.You my friend,have ***** of ,umm haha Rotorhousings.

Karis

 

whats wrong with a 12a alex?! lol

kim, great idea..