rx-7fc

what parts do i need to put an intake mainfold off a s5 to my s4 and i did do a search

niner

In my opinion, it is not worth the trouble. The 89+ manifold has the VDI system, the 86-88 does not.
The other parts do not match up and is not worth the trouble to change out the manifolds, w/out swapping engines.

Agent_D

iTrader: (2)

its not really that hard, ill post a link to it in just a few mins when i find it, plus its good for at least 12hp if it works good

niner

I stand corrected if you show the documentation.

InitialD FC

iTrader: (1)

I dont have any documentation, but I know for a fact that the series 5 intakes manifolds are larger, if you put the two side by side, you will see, i dont know the exact measurement though... Its a middle ground between the series 4 and the series 6, which are alot harder to install, instead of a direct bolt up.

niner

^yeah, I am not sure on what controls the VDI system, but I do not think that it is a direct bolt up
I would like to be proven wrong though...

billzrx7

its not a direct bolt up, port matching and some other hinderences have to hapapen. dont quite remember what all goes into it tho.

FPrep2ndGenRX7

http://homepage.mac.com/carldavis/main/main.html

niner - Here is your proff. This guy got to 161HP at the rear tires after his swap. Definetly worth it.

RX-7Impreza

yes definitely worth it. the airpump activates the vdi and most people take those off anyways so they end up wiring open their vdi to get more top end. even with it wired you still have more low end. this is the main hp difference between s5 and s4. apart from the HC lightweight rotors

Justin

Wankel7

I am not sure...but I have seen posts saying if you do the swap the fuel rail will be in the way.

James

FPrep2ndGenRX7

Check out the link I posted above. It says you need to use the series 5 fuel rails and there is some additional grinding required.

SureShot

VDI actuator uses vacuum - 6-port actuators use air pump pressure.

niner

righto, i was wrong