Hi guys I saw on a web site that there is a rotary

13b-rew engine and a 13b-re engine could anyone tell me what the difference is?



Is one of them from a Cosmo?

if i'm not mistaken, the 13b-re is from the cosmo.



the 13b-rew is from the 3rd gen rx-7

I thought it was the other way around.

re have different intake runners, manifold set up, and ecu set up



all the rotors, rotor housing are the same for the 20b, 13b-rew, and 13b-re



so for those who have a 20b engine its ok to use 13b-rew housings.

The 13b-REW is in the 3rd gen fo sho

yea you guys are right

13b-REW in 3rg gen

13b-RE in the Cosmo



the cosmo has a funky looking upper intake runner like a hand with its finger spread out. the 13b-rew runner are a better design. in fact some people are porting thier t-bodies

to get 7-10% more flow go to rxforyour7.com for more info

https://www.nopistons.com/forums/pub...DIR#>/ohmy.png the ports in the RE are much larger stock than the REW...someone had his ported rew next to a re . the re was not much smaller stock than the rew ported to hell....the exhaust inserts are smaller on the re tho..also the 13b-re was from an auto.. they share a very similar twin turbo set up.. and the re makes around 230 hp at 6psi and the rew 255 at 12psi. ..the RE is a better buy if you want to go totally custom on your ride...the good thing about the RE is if you go single turbo you can use a 3gens turbo manifold or a second gens....Im hip deep in doing a 13b-re swap into my fc.

The RE has WAY larger intake runners than the REW, as well as larger intake ports, but has smaller exhaust ports.

The thing I don't get is, doesn't the "W" in 13B-REW stand for the twin turbo arrangement in which case a cosmo motor would be an REW one aswell...