Just curioius how hard it is or if it is even possible to mate a 13B-REW or RE intake manifold to a 13BT? I found pictures of Soul Assassin's FC on FC3s.org



anyone else done this?

 

there is an adapter made to attach the FD upper manifold to S4 TII lower manifold, its been done a few times. I believe you have to change your throttle body too. you'll get mixed responses on whether it does much, if anything at all. personally i dont think its worth the money/hassle since no one has proven it provides any gain.

 

theres a guy i know who's got the fd upper intake manifold on his 470hp 89 t2 car.

 

to be honest, the main reason I want to do it is for the looks. the TII mani is oogly

 

do you know where i could pick up this adapter?

 

anyone else?

 

There are three ways to go about it, two very difficult and one fairly easy.

To properly port match the fd uim to the fc lim is very labor intensive and requires some welding skills with aluminum and porting tools to shift the ports over in each of the manifolds.
I did it one way and BlueTII did his the alternative way. He too can vouch how much work it was. Search under his name if you want. I assure you most have not done it this way but Ian and I are not the only two who have.

The easy way is to just buy an adapter plate. There is/was someone on this forum making them. This is definately not the ideal method though. I had done it this way originally and thought (incorrectly) the drastic angular shift in the ports would not make that much of a difference. The dyno proved me wrong after I did it the crrect way.

You could be a hack and just match the mounting holes and port match one of the manifolds. Many hacks have done it this way and it will definately hamper performance. Looks cool though.
There is/was a write up on how to do it this way on teamfc3s.com.

 

BTW, my fc lim and fd uim conversion are for sale.
Both are professionally polished, and have been PROPERLY portmatched and ported/polished. Has all the block-off plates too.

Check out the pics in my sig.

 

Is it for s4 or s5?

 

S5 lim and S6 uim.

Will fit either S4 or S5 cars.

 

Huh, never noticed how Soul Assassin ran his intercooler piping before...

Anyway, I hate to say it but if you search for "FD intake" you will get a load of info. This has been extensively covered in the past in great and painful detail.

 

it is really not that difficult but their are a few things u will need to do if it is an s4 u need an adaptor plate and can not port match the manifold the are to different if its an s5 you do not need a adaptor jus grid and match but its a lot of grinding. there are so other things you will need to consider 1) the omp you wil have to make a custom adaptor and cable setup to make it work properly unless you block it off and premix 2) you can no longer use the stock top mount u will need to run a v mount or fmic 3) if it is an s5 and you chose not to make an adapter you will need to shorten the oil fill tube also you will ned to do somthing with the fuel rail idk exactly wut b/c i did it with the s4 LIM 4) you will also have to enlongate the holes on the FD UIM for both s4 and s5. the s4 you will need to do a lot more grinding (is not difficult) most people will not want to do this b/c of the larger holes but it does not look bad at all. any way im sure there are a couple things i left out but like aaron said you can find a lot of good info by seaching i will also recommend you finding BLUE TII's thread the pix arnt there any more but is is extremly helpful. oh and btw the tII uim is really ugly the fd look so much hotter
-James

 

what do you want for them?

 

There is absolutley NO WAY to simply grind enough material to get the ports to match up. Simply impossible. I andBlue TII know this. There is not enough material on any of the manifolds, S4/S5 im or the fd uim.
With the mop lines, you can simply swap out them out for the right ones.
The oil filler neck does not need to be shortened. It can simly be swapped out for an FD filler neck mount and use the stock TII upper filler neck.

 

Heres one of the MANY links about this...

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/fd-adaptor-plate-yay-562824/

 

I make the fd to S5 lower intake adaptor. https://www.rx7club.com/showthread.p...ghlight=fc3s91
Thanks Robert

 

isnt there an adapter that will fit a S5 TII throttle body onto the FD UIM? I couldve sworn I seen one that way. Or do you have to use the FD throttle body if using the FD upper intake??

 

Dude, you forgot about the 4th method!! Just do a 13b-REW swap!!

 

Everyone I know uses the fd throttlebody .

 

with the TD the FD is bigger and also more efficient because it by factory doesnt have the 2nd set of secondary plates and also they are more smooth (like kinda like pre ported, where as the S4 has those jagged edges).

If your a S5 you can use the FD TPS as long as you splice it from what i remember. S4 users will have to splice and use the 1/3 throttle reading and NOT the full sweep so out of the 4 pins 1 will not be used. Thats just from my research.

 

I had the Feed adapter for my first setup in my turbo vert. The adapters will cost you power. I have dynoed the results between the adapter and a proper port job.
Icemark was right.

I cannot compare the benefits of the Fd uim with a proper port job over the regular FC uim. I never had a baseline test between the two like I did with adapter and then the proper porting. If I had to guess, the benefits, if any, are negligable.

You may as well stick with the fc uim....or buy my manifolds already done

 

this may be a silly question but do I use the FD throttle position sensor? and wil that plug into my S4 T2 harness? or will I have to cut and splice?

 

you will have to cut and splic leaving the full range signal disconnected b/c s4 tps is not ful range is not difficult i also spliced in the fd air intake temp sensor and bac

 

how do I leave the full range signal disconnected?