currdog

Well i just got in my jspec engine from japan2la for my 85 rx7. Well the engine has alot of differnences from my old one. First it dosent have the under oil filter oil cooler...it has the lines running for a front mount oil cooler. The distributor is way different than mine, this one looks to be a points distributor with only two wires and a single two wire plug with one vac port. also it has some smaller holes in the housings under where the main exhaust ports are. does anyone know what this engine came out of or are these just some common differences between usdm and jspec??

thanx

flight_of_pain

I don't have any knowledge of the jdm options, but if that was a usdm motor I would say it is a 79-80.

your distributor will swap onto this motor, and upgrading to a front mount oil cooler is a good idea anyway

13x

check the spark plug holes if doesn't have "eye brows" like your series 3, then yes I would agree 79 - 80, but 80 didn't have points dizzy in the US only 79 did. It also sounds like they were running the oil cooler up front like a SA or GSL-SE, sounds like a better way to go

currdog

ya no eyebrows on the spark plug holes.

mazdaverx713b

iTrader: (91)

post pics of the engine for full clarification

currdog

dont have a camera at the moment..sry

currdog

this engine doesent have a spot for a oil pressure sending unit either....

DivinDriver

iTrader: (15)

Sounds like 79 SA in all respects, so far.

Without pictures, it's all guesswork, though.

No camera on your cellphone?

currdog

not at the moment my droid got destroyed so im using a brick phone lol

currdog

what can i do with the two little exhaust holes under the main exhaust ports?? my racing beat header that was on my 85 engine dosent have a spot for those?? what are those anyways

t_g_farrell

iTrader: (1)

small holes near exhaust ports == thermal reactor

no eyebrows == SA

front mount oil cooler == SA

points dizzy == 79 SA

So its a 79 SA almost certainly.

DivinDriver

iTrader: (15)

Just let your header serve as a blockoff plate for 'em... they're there to support the air injection system, which fed thru the bottom of the thermal reactor. Header flange blocks them nicely.

currdog

do i need to use something to make sure that they dont leak???

DivinDriver

iTrader: (15)

Use the regular exhaust manifold gasket. Works dandy dry, no goop needed.

currdog

cool

13x

yuppers, with the header flange your good, with the s2 and s3 exhaust manis you end up with an exhaust leak.

currdog

is the sa engine any better or worse as far as performance and reliability goes than the 85 engine that was in my car??

Jeff20B

iTrader: (13)

The SA engine has heavy rotors and a small oil pump compared to your '85.

currdog

how much of a impact is that gonna make?? will the oil pump off my 85 work on this engine?