Cosmo intake manifolds?
Thread Starter
Full Member
Joined: Apr 2004
Posts: 59
Likes: 0
From: Phoenix, AZ
Cosmo intake manifolds?
Has anyone ever swapped out the FD lower and upper intake manifolds for the Cosmo RE ones (bigger ports). I understand that they could potentially yield more power and a different torque curve but have not seen or heard of anyone actually doing it.
Here ya go:
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.
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.
multipersonality disorder
Joined: Feb 2002
Posts: 5,656
Likes: 0
From: so. cal
i'll be able to answer that before too long.
i intended on using a cosmo in my fd, but ran short on funding, so i ported the runners to cosmo spec...now i can just bolt the manifolds on and it's abotu good to go-other than the little stuff.
i intended on using a cosmo in my fd, but ran short on funding, so i ported the runners to cosmo spec...now i can just bolt the manifolds on and it's abotu good to go-other than the little stuff.
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
Mar 15, 2022 12:04 PM
