rotor housing question
 

well i'm having no luck finding good T2 rotor housings so i figure i would ask if it is possible to make N/A rotor housings work in a T2 application? the ports could be milled for the coolant and exhaust passages that is not a problem, neither is reaming out the diffuser but i am not sure if there is any other restrictions that would cause this not to work, also is there any significant difference between an S4 and S5 rotor housing to cause a problem as well?

if there is a way i may setup and start producing rotor housings for the T2 community since they are becoming more scarce every year where N/A seem to be the opposite, i can get my hands on a dozen N/A rotor housings easily enough but can't seem to touch a T2 housing wherever i look..


main reason i bring this up, most of us are on budgets, christmas months broke me. my truck's left front upper control arm buckled on my way home from work today and i have already spent $1500 on the FC so far this year so i am trying to find an alternative way to keep costs down than paying $300 each for rotor housings, of which i need 2 of to fix my problem.

^

THe housings will work fine assuming your not using the stock turbo/cooling system. The LIM on the TII has a water jacket housing that feeds coolant to the turbo via the TII rotor housing coolant holes.
If its an aftermarket turbo that runs on oil only, you'll be ok.

As for the S4/S5 housing question, I have no idea.

Have you tried finding FD housings? I have no idea how much they are used, but they're far superior to the TII housings and I have been told by a few people on here that they are interchangable with the FC block.

hope that helps some.

thanks help but hopefully someone who has actually made n/a rotor housings work in a T2 would show here so i can be sure that my thought will work.

FD housings are even harder to find and likely more expensive than T2 housings, most 13BRE are overhauled and resold or reused.

my plan was to take an n/a housing, make a template and drill and machine the n/a housings to have a port at one of the rotor housings for the turbo coolant feed line at the rear housing. there is also an exhaust port for either the twin scroll system or the EGR, i would have to look up what the port is for exactly but these are simple modifications to make and require simple machining. last would be to either get some T2 exhaust port steel inserts to complete the conversion or to grind out the n/a diffuser so it would be open flowing like a T2 exhaust port.

thanks for the input. :)

Hrm, FD housings superior? I'm posting here just so I can find this thread again :)

i know the FD irons were far superior because of the size of the ports but i don't know about the rotor housings (exhaust ports), you can port the stock 13B housings well enough to flow for most any street applications. i don't plan on making it into a 900HP drag car. ;)

Yes, you can use the N/a housings, I've done it many of times. Either replace the exhaust sleeve or cut the diffuser out.

I just did use N/A rotor housings in my T2. Started up the rebuild today. Drill out the diffuser, drill one coolant passage.... BAM! there you have it.

Make sure to make a small gasket out of gasket maker to seal the coolant passage and use hard drying gasket sealant on both sides of the gasket. Mine hasen't leaked yet. 3 heat cycles and a couple hours of the engine running.

Good luck!

i always do, i hate relying on the o-rings.. but i do plan on milling the stock seat for the o-rings so that it is as near as stock style as possible. i will probably offer single stock replacements and ported pairs of housings.

thanks for your replies, if anyone else has any other issues with the housing swap please post them.

https://www.rx7club.com/3rd-gen-archives-73/so-its-possible-use-2nd-gen-n-housings-our-fds-350315/

I = own you all :D

:worship: We're not worthy! We're not worthy! We're scum, we suck!

Good work Kev...Pat Pat

would it be better to try and use a set of S5 n/a rotor housings for my S4 T2 or should i stick with the S4 n/a rotor housings?


and thanks for the info Kevin.