I know the intake ports on the RE are longer than the REW, but does this have any implications on setting timing?

Im running the stock powerFC 004 timing map (with 5 degrees of extra retardation past 2500 RPM and .2 bar boost for added safety).

Would it be safe to put the timing back to the powerFC stock 004 timing map?

 

Whats an RE engine...?

I know the 13B-REW engine, thats easy. Mazda used them in the JC Cosmo & FD RX-7

Mazda named their engines differently but Ive never heard of a 13B-RE

Do you mean the 13B-RESI engine that was installed into the Series-3 RX-7 from 84-85

 

there seems to be a discrepancy in nomenclature. i think i remember DMRH clearing it up a while back. Mazda's brochures and internal documents have the FD and JC engines both listed as 13B-REWs if i recall what DMRH said (and showed). anyway, to us ...

RE = JC Cosmo
REW = FD Rx-7

this is what i think he's basing his question on.

 

For most setups there is a wide safety margin in the leading map supplied by Apex'i. However, the trailing timing is a bit too advanced by many people's standards. Your best bet is to start with the Apex'i basemap and retard the trailing timing (add trailing split) for any row over about N15. I recommend about 4 degrees of additional trailing split (retard/decrease the IGT value by 4 in each cell). See this thread: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/how-make-your-untuned-pfc-basemap-safer-idle-better-no-datalogit-needed-841706/

As for the RE vs the REW's porting, it's not going to make a big difference IMO unless you are already have an aggressive tune. I've run similar timing maps between series 5 FC's and series 6 FD's and the larger FD ports didn't seem to matter much.

 

G'day matey. Your post prompted me to call DMRH here in Sydney & ask him the question.

He explianed to me that I was correct with Mazda calling the Cosmo plus RX-7 engines a 13B-REW. Then said its only the "uneducated" Americans that didn't know any better & hate being proved wrong for the reason it gets mis-represented.

He wanted me to ask if the 20B-REW should also have its official name mis-represented by calling it a 3 rotor matching the name on the top of the manifold like the 13B-REW Cosmo engine has a 13B-RE on its manifold.

Worth noting is he went on to explain that he has given up on this forum when some ****** admin guy decided he couldn't have a link to his own Cosmo site after 6 years of membership with the DMRH site in his signature section.

 

Considering the 2 rotor cosmo motor has a NAMEPLATE on the top of the manifold with the letters 13B-RE inscribed upon it, one can be sure that the motor is NAMED a 13B-RE.

This isn't to say that Mazda never referred to it as the REW.

However, it does mean that you are incorrect in saying that Mazda never called it the 13B-RE, and that you are also incorrect in saying that it is solely uneducated Americans that name it the 13B-RE.

OR... maybe those sneaky Americans got into the Factory and changed all the nameplates to read 13B-RE instead of REW....