Hey guys, ive seen this mod on a few cars and i have pruchased an FD manifold thinking it was straight forward, to my suprise it isnt. Either i have to make an adapter for the bottom intake manifold or an adapter for the top. Ive seen this done a a few cars and i would love to know what the easiest solution to this is.

Hope to hear from anybody on this, thanks.

 

You'd need to make one of these, . That's the FEED model of it, it goes from S5 LIM to S6 (FD) UIM. Also, unless you have an S5 TPS (electric) you won't be able to use the FD TB/TPS unless you provide a way for the S4 mechanical TPS to fit. It's a chore to say the least. The reason for using the S5 LIM is because it's a little closer to the S6 jazz, making an adaptor for the top to bottom or bottom to top would be the same thing. Judging from your sig ('87T) you've got a bit of work ahead if you really want it to work.

 

Claudio, not trying to be a dick, but u should have tried searching. Its been asked before a few times.

 

Thanks for your replies guys, as a matter of fact im aware of that adapter you show there "barcode", ive browsed through the JDM rotary sites for a while, i also have a video from RE Amemiya with that White Super G FC they built. It HAS at least an UIM from an FD, but since the video is on my PC the quality is a little low and i cant make out if the LIM is from the FC motor or the FD motor.

Also, i should mention that i am using a Haltech on this car so the TPS i have for the FD manifold will work just fine.

Anyway, ill do a search on here for more info, thanks again.

 

You do not have to use an adapter, you can modify the manifold to fit. Also try searching over on www.teamfc3s.org it has been discussed at length there.

 

Yup, all you need to do is port match the manifolds to line up... I did this and it works fantastic... The FD TPS is soooooooo much better

 

Can you tell me the direct link/URL in there? Also, the ports dont line up, the screws dont line up either.

The screws on the 13BT motor arent in the same locations as the ones on the 13B-REW, care to explain how you pulled it off? Also, the ports are WAY bigger and not in the same place.

Let me know,

 

search for it.

You have to do some port matching, and the S5 and S6 studs are close, you just drill new holes.

 

http://www.teamfc3s.org/forum/showth...ghlight=fd+uim

There's the link, lots of good info. The search button is your friend...

 

Ok, that helped a lot, i saw that the easiest way of adapting the upper intake manifold is by grinding (or widening) the holes on the FD unit so that it lands on the lower FC manifold. The hole for the center long screw is your main reference for placement. That is no biggie, and since the lower FC manifold has bigger primary runners i guess i have some port matching to do to maximize flow.

I will try to post pics on the process when i can. The other option i see is using side housings from a cosmo or REW engine. But that raises the stakes a bit. I have access to those engines here, but they are expensive and/or who has them in good condition dont like to part with the parts.

Thanks all for your help.

 

i did the swap and im still using the stock ecu

heres how you wire it if you have a s4

fd tps with tab up

prong 1 is ground=black and brown
prong 2 is (narrow)signal= green/red
prong 3 is 5 volts= brown/white
**** 4 is (full range) signal= leave unplugged because you dont have full range (s5 does)

 

So i guess the FD LIM does not match the S4/S5 engines?

EDIT: Nevermind, i found my answer on the other forum.

 

So Calio, you sure the factory S4 ECU will be content with the signal from the FD TPS wired like that?

Let me know,

 

i actually have a s5 ecu, but yours should work you just dont have full range signal to hook up, if you have a s-afc you can tell by the throttle % to be 100% sure, it should work

 

Thanks, I will try it when i do the installation.

Later,

 

Well, i just got my self a Haltech E6K and will be removing the factory ECU pretty soon, and will resolve to bolt the FD UIM onto the FC LIM and work my way from there. In the long run my goal is to get a Cosmo 13B-RE engine and build that up for max performance. Ill will post the pics of the manifold mod when i have it done.

Thanks for all your comments, if i have time i will try to fire up the engine with the factory ECU and the FD UIM to see if it runs.

 

Ok, i just got my self a 2nd Gen intake manifold gasket and placed it ontop of the FD UIM to see how much matching i have to do, and its disappointing at worst, there is A LOT of port matching to do, and the nut holes on the FD UIM have to be opened too close to the runners, and im affraid they wont fit. I could get smaller sized nuts.

This mod is becoming more trouble than its worth, anybody here do it with success and can share the process?

 

As has been posted many times, you can't match the FD UIM to the S4 LIM. You must use an S5 LIM and then port-match the two halves. This is why you should thoroughly research this type of mod before you start spending money. Unless you're planning on making a lot of power, the relatively small gains won't warrant all the hassle.

 

If you can give me the links for all these post i would VERY MUCH appreciate it. But since im already working on my car, im learning as i go.

After thorough verification of all 3 types of manifolds, series 4, 5 and 6, i have seen what has to be done, you where right on the fact that both the s4 and s5 manifolds vary a bit, i hadnt noticed, to get the S5-LIM and S6-UIM to line up you need to use the long screw as your guide, the outter most screw holes on the S6 man. have to be drilled a bit inward so they can line up, the inner 2 screw holes on the s6 man. have to also be drilled inward and towards the main runners, and the main runners have to be machined inward to line up with the S5-LIM, and it worries me a little because it comes pretty darn close to the edge of the manifold it self and i wouldnt want to damage it.



Anyway, im hopefull that i can pull it off, if not, i will start the car with the S5 manifold installed so i can get it running first, then ill finish off the manifold mod.

 

Actually both the s4 and s5 TPS are electic. I dont know why you would think the s4 isnt, I dont even think there is such a thing as a mechanical TPS. The difference between teh s4 and s5 TPS is that s4 one is only open and closed throttle, but the s5 one is also full motion of the throttle. Also I dont think you can even use the s5 tps on the FD manifold because it probably wont bolt up. You have to use the FD TPS and modify and do some wire spicing.

 

Probably the best thread on fitting the FD UIM is this one from Blue TII, but unfortunately all the pic links are broken. The text is pretty informative though, and if you PM him he might send you the pics.

 

Thanks, i just PM'd him, hope he contacts me, if anybody has his email addy, please let him know about this.

 

Yes, i understand your point, i also spent a while looking for information, here and on the other rx-7 forums, guess i didnt use the proper search criteria .

Any way, i have a lot of s4/s5 manifolds lying around, so i bought the FD manifold to work with. I have the Haltech now, TO4E turbo, FMIC, bigger injectors, and will be bolting it all together, my power goals with a stock motor a over the 300hp mark. Then when i have some more money ill build a proper and more powerful motor for 400+ daily driver. I used to have all that installed, but for reasons too stupid to name i blew up my motor, went broke, sold all the go fast parts, now i want power again, im sick of the stock s4 ECU. :P

Thanks for all your feedback with this.

 

U should easily make it over the 300 mark claudio.