kborro01

iTrader: (3)

Esentially what is different internally to a 1990 American S5 T2 2 and a JDM T2. Or for that matter a non Turbo Block vs a American and JDM Block. here's a what if,
What if..not to be confused with "watch this ****" If I had a JDM engine to that needed new rotor housings or Irons, could I use an american T2 housing or irons...a non turbo housing. I'm under the impression that the blocks are the same. The only differance between a Turbo and non turbo engine is the rotors used. One has High compression and one has low compression. But are the seals and such the same.
I want to rebuild my JDM engine, but I don't know where to find JDM parts and I certainly don't want to buy another JDM engine just to strip for parts.

RETed

Too lazy to search?

Basically you answered your own question...
The internals are all the same.

Differences between US-spec versus J-spec are emissions / wiring harness related.


-Ted

kborro01

iTrader: (3)

Not to lazy to search. Just getting conflicting information. All the parts are the same? Well that's great news. I' just wondering why the parts have different part numbers is all. Seem they would have made their inventory easier to manage if all the same parts had the same part number. For example from the mazda parts catalog
ASPEC NT Front Rotor Housing - N350-10-B10
ASPEC Turbo Front Rotor Housing - N318-10-B10A
ASPEC NT Rear Rotor Housing - N350-10-B50A
ASPEC Turbo Rear Housing - N318-10-B50C

Even Mazdatrix lists different part numbers for these parts. So I can only surmise, from, what little research I've done, is that I can't take Non Turbo parts and use them in lieu of Turbo parts as some of the Experts here would lead me to believe.

87 t-66

iTrader: (133)

the part numbers are different because there is a difference between NA/T and F/R housing. notice the descriptions before the part numbers

kborro01

iTrader: (3)

That was my original question. I have a JDM engine to that needs rebuilding (front rotor has no compression). Can I use Non turbo housings in lieu of Turbo housings? I get that ASPEC and JDM turbo short blocks are the same. That was only part of the question.
I bought the car from a place called Protomotor sports in San Beradino. I what making Clacking sounds during the test drive and they told me it was just the ujoints going bad. Sounds about the same. I drove the car for about a month and a half and it started running on half power. I put the car on block until I could get the engine pulled. Finally got that done on saturday and did the compression check and good back rotor compression, no front rotor compression. I called my good friends where I bought it and they said...hmmm, that sucks. Needless to say, I won't be a customer for life. I may explore some legal options, especially when they gave me a definitive, it's just the U-joints. If they had said it might be the ujoints, but it could be predetonation, I probably wouldn't have bought the car.
So now I'm looking at a rebuild.

RETed

Japan never got a non-turbo version of the engine.
The non-turbo 13B in the US for FC's are 6-ports - almost identical to 1984 - 1985 GSL-SE models.
The 6-port intake and irons are not the same versus the 4-port turbo stuffs.

Basically, the side irons - both the front and the rear - are not the same.
The center iron can be swapped between the two, but the center iron on a non-turbo engine has the EGR attached to it - easily blocked off if you don't need it.

ROTOR HOUSINGS are different between turbo versus non-turbo due to exhaust port insert sleeves.
These can be swapped if needed too.


-Ted