i posted this on the on a diff thread but hope fully i get replyed on this


i recently bought my 4th rx7, i decided to buy the car because it came with 2 motor. i recently blew the motor on my other rx7 so i got it. i was told one of the motors was a 93 (is still has the tII intake) and the other one a 91. the one that was said was a 93 has a singel turbo not the tt. i just wanted to ask if thers a way to tell what year the motors really are.
and if the 2nd gen intake interchange with the 3rd gen

i would also like to ask, the car was set up with the v mount radiator. so i want some opinions, is it better having the radiator set up as a v mount or the stock way?

its an 87 gxl if it matters,

thanks in advance

Abner

 

the intakes are not easily interchangeable. you were likely lied to about the '93 engine. take pictures of the engines...most members here can easily tell from a picture.

 

V mounts are great when done right. Post pics and we'll let you know.

 

ok ill try and post piks asap

one is a bare blok and the other one is on the car but ill get piks when i can
i was thinking on the vmount but not shure how to set it up like angel of radiator and ic

 

Assuming the motors haven't been ported the REW has larger factory ports then the 13bt, the water pump housing are different as well, I believe the REW water pump is a reverse rotation unit.

 

where are the pictures?

 

this is the pic i got of the bare blok ill get more detailed ones later this are the only ones i got in my fone


this is the one on the car you can c the watter pump, so hopefully some one can help
ill get more detailed pics when i get home

 

TII engine, because of the stock location of the driverside bracket on the middle iron.

 

Looks like a s4 Turbo II engine judging by the thermostat neck.

 

the first picture looks like an s5 89-92 (usa) the oil filler neck is vertical and does not tilt. the 86-88 oil filler neck make a 45 degree angle bringing it closer to the fron housing. correct me if i'm wrong thats the way i've told kegs apart.

also the intakes are different since s4 has 4 ports and s5 has 6 ports.

as far as telling from turbo to non turbo i don't know. but i want to.

 

not sure if your info is totally correct... i have an 86 base and my oil filter neck is vertical.

and both series have 4 port (turbo) and 6 port (n/a) engines.

 

Oil filler necks are angled on turbo engines and straight on non-turbos in FCs regardless of series or domestic market. However, like the thermostat neck, they are interchangeable, making them not a reliable way to tell what engine it is.

 

founs a lil difrence that can b really helpfull


it u notice were the lil circles are on the rotor housing, this is the motor on the car btw

and heres a pic of the block

the lil circles on the rotor housing are locates lower on the bare block
this might be another way to tell

but i'm not shure

here are more piks




motor in car

 

Both engines are 87-88.

 

The motor out of the car has at the very least an s5 center iron since theres no EGR and I don't think I see a block off plate, but then again the picture I'm referencing is tiny. I'm squinting and its still hard to tell.

 

how did you tell what year they wer??

n the guy i got it from said he has worked on em well might just have a stok rebuilt. but will it not having a blok of plate hurt anything?

 

and also y is it if there both 87-88, y are the lil circle located in different places? well at least a lil higher? jw im trying to learn something here lol

 

the little circles mean absolutely nothing, just casting mold identification. s4 usdm turbo engines don't have EGR on the center plate, it's on the lower intake.

both motors have S4 water pump housings(aluminum thermostat housing) as well as s4 rotor housings(no knock sensor holes above trailing). S4 turbo was only in the states from 87-88. the motor in the car has an USDM upper intake manifold. they also have S4 turbo front covers...

you have 2 S4 Turbo engines. likely USDM. a LOT of misinformation is getting posted in this thread...

 

Good info! Whats the difference between a JDM UIM and a USDM UIM?

 

the extra threaded bungs on the runners for the #2 rotor, as well as that extra barb sticking out near the BACV. also the brake booster barb is near the throttle body as opposed to being located on the LIM for a J-spec S4.(due to the brake booster being on the other side of the car for right hand drive..)

 

thanks for the info man its reall7y nice to know what i really got now so thanks alot

i should of dome my reasech before i bought them but its coo i still for a deal i think lol