Originally Posted by jspecracer7

The 2 hardest things to do are: Throttle cable and TPS. Everything else is pretty much cake.

You'll need these parts:

1. Cosmo 13B LIM
2. Cosmo 13B UIM
3. Cosmo 20B throttle body
4. Cosmo 13B aluminum elbow
5. Cosmo 13B LIM/Engine gasket
6. Cosmo 13B LIM/UIM gasket
7. Cosmo 13B UIM/throttle body gasket

You'll need to port match your 13B-rew engine to the cosmo 13b intake runner size since they're quite different....that is unless you want to makes LESS HP

Reasons for the 20B throttle body?

1. 13B-rew throttle body bolts up to the cosmo intake...but isn't shaped the same. The cosmo has a small lip on the bottom(appx. 2 to 3mm) that will allow air to bypass the throttle body and allows air to seep thru.

2. Cosmo 20B is 2mm bigger than stock FD.

3. Cosmo 13B UIM does not have a idle control valve built in like the 13B-rew UIM. The 20B throttle body has one.

4. Cosmo 20B is about 1 to 2 cm longer than the stock FD throttle body. Since the cosmo 13B UIM is shorter than the FD UIM, the 20B throttle body being longer allows the throttle body elbow to clear the oil filler neck.

Basically in a nutshell, you'll need to figure out your fuel needs and how to run your throttle body cable.

You'll need to redo intercooler piping since when I did mine....absolutely NOTHING matched up.

You'll need to swap pins 2 and 4 on the stock FD TPS plug. The FD is a 0 volts to 5 volts TPS. The Cosmo 20B is a 5 volts to 0 volts. Swap pins 2 and 4 and you now have a cosmo 20B with a 0 to 5 volts TPS.

I tried to mix and match FD and cosmo parts...and nothing worked out right. If you do this...just use the Cosmo stuff. Trying to make an FD throttle body work on a cosmo 13B UIM was a PITA for me. I didn't have the time or the resources to make an adapter like Michel did. My conversion was the "poor man's" conversion. In hindsight....knowing what I know now...I could probably do the conversion in about the same time it takes to remove the stock FD intake manifolds.

Also, Please don't PM me guys. Post your questions on this thread so I can answer them all at once and not individually.

Originally Posted by dDuB

Really? Even though the ports on the cosmo UIM are bigger?

Originally Posted by RacerX_IU

you guys dont really have much of a clue. the throttle body fits on the fd uim perfectly and as for a size difference its a millimeter or two max!!

Originally Posted by RacerX_IU

yeah the size difference is smaller by like 3-5 sheets of paper

Originally Posted by RacerX_IU

you guys dont really have much of a clue. the throttle body fits on the fd uim perfectly and as for a size difference its a millimeter or two max!!

Originally Posted by ORX705

here ya go

Originally Posted by RacerX_IU

i have been referring to the 13b cosmo TB, so maybe that makes a difference. And yes there bottom doesnt line up all the way and thats what gasket sealer is for...lol That is what ppl are using with the FD tb on the cosmo uim.

Originally Posted by jspecracer7

UPDATE UPDATE UPDATE UPDATE

I took my 20B TB and a spare FD TB I had lying around(yes I have random FD **** laying in every crack of my house) and removed the Throttle body throttle plates.

The SECONDARY plates are IDENTICAL in size. I even swapped them from FD to Cosmo and back.

The PRIMARIES are IDENTICAL in size. I even swapped these around just to see if they would work.

The cosmo TB plates LOOK smaller but are actually the SAME size as FD.

Now anybody in the states with a FD TB and a cosmo 20B TB want to remove the plates and tell me I'm wrong?

Originally Posted by jspecracer7

yep, big surprise for me too. But go ahead and confirm my findings