mine is 1990 uk car twin turbo does this have pre cat of just the normal cats

no pre cats on JDM cars, not sure about UK cars.

I thought it was USDM cars only, to meet certain smog criteria in some states?

just did a quick google for you.

 

UK cars have one pre cat on passenger side only.

am reading the cat on one side was only from 94 uk cars but some were else says all years

Easiest way to solve this is to crawl under your car and have a look. It's the only way to know for sure.

just waitimg to get my car back will have look

I thought it was all UK/EU spec cars regardless of year - not sure about JDM cars though.....

 

Richard:detective:

I thought it was all UK/EU spec cars regardless of year - not sure about JDM cars though.....

 

Richard:detective:

 

Yep, this was my understanding also. Its definatly not just 94 cars, I've not seen a UK car without them (except those fitted with aftermarket downpipes)

so its only on side to ?

UK/Euro cars fitted with pre-cats on the passenger side:

 

http://nissan4u.com/parts/300zx/el_z32/1990_1/type_1/exhaust_and_cooling/catalyst_converter/

 

Outlet-exhaust 14449-30P00 with CONV ASSY from '90, January — '92, April and 14449-40P05 '92, April — '94, September

 

The catalyst is small unit installed into the lower part of the cast iron elbow.

 

-Andrew

Odd question to reply with, but why?

Odd question to reply with, but why?

 

I think its a decat question Steve...and ile answer the second half for him. Iff you want to fit 3 hole decats on a zed from S2 or UK onwards it will have the single precat on i think the pass side aswell as normal cats.This precat if i remember right forms the actual turbo elbo so must be changed for a S1 normal elbo for a "full" decat. Ime sure there will be someone along to correct me if ime wrong but i think ime right on this one remembing my last S2 i had.

I think its a decat question Steve...and ile answer the second half for him. Iff you want to fit 3 hole decats on a zed from S2 or UK onwards it will have the single precat on i think the pass side aswell as normal cats.This precat if i remember right forms the actual turbo elbo so must be changed for a S1 normal elbo for a "full" decat. Ime sure there will be someone along to correct me if ime wrong but i think ime right on this one remembing my last S2 i had.

 

Yep, thats right. Just fit a non-precat elbow (from an Import) or fit aftermarket split wastegate elbow/downpipes.

Yeah, that's why I asked. There's ways round it.

Yeah, that's why I asked. There's ways round it.

 

I remember reading once that soaking the catalyst in oil then digging it out..the oil soaking as you go stops the bearing destroying dust floating into the tub cartridge.Hey presto a hollow and somewhat normal ellbo:cool3:

there's a guide on 3zc on gutting the pre cat

there's a guide on 3zc on gutting the pre cat

 

Here is the TT.net guide:

 

http://www.ttzd.com/tech/precatstech.html

 

-Andrew

Be easier to swap it out for a Jspec elbow, bet you could get one for free. If you've brought full straight through test pipes you will get the divorced downpipes with it.