ok i just got my engine today, compretion test looks kind of good (its a jdm BTW) now on the intercooler it says rotary engine with intercooler, the ecu says fc35 on it, well painted on the fan painted on says 13Bt i thought that 13BTII sayed 13BTII on the intercooler?? im i not wright>?

 

the japanese intercooler reads Rotary Engine with Intercooler, the american intercooler reads. Turbo II Intercooled.

an fc3s is an 86-91 rx7.

it is a 13bt, 13btt is the FD twin turbo motor.

 

single turbo so that would make it a 13BTII then ok thanks

 

You don't call it a 13BTII...

Common termonology for it is the "13BT" engine. The "II" is only because it is the second turbo car Mazda made in the RX7 lineup.

 

i C thanks

 

will a S4 T2 AFM work on my 88-91 i belive its s5 engine not shure tho fc3s ??

 

If it is a S5 engine and a S5 fc than you need a S5 AFM

 

how do i know for shure what year it is i looked realy quick for ## on the block and could not find any they must be under dirt

 

Look at the injectors. If the injector is purple and has a high square plug it's a S5, if it is purple and has a high oval plug than it is a S5

 

low square tan is a 86-8713BT, high square offset purple is 88 13BT, and high oval center purple is 89-91 13BT

 

I meant if high square it's a S4

 

nice thanks

 

i would be scared that the fuel would eat away at my engine! i heare that ppl who race with those types of fuel in go carts and some Jr. dragssters they have to drain the oil and flush out the engine to prevent it from getting eaten away, from what i here the rotary engine fragile, when it comes to sertine types of chimicals so i woulder her it would do runing those types of fules??