13b Cosmo
Senior Member
Joined: Jan 2003
Posts: 267
From: Perth, Western Australia
I think (but not sure) you have to use the cosmo lower inlet as well.
The other difference is that the cosmo motor has substantially larger intake ports on the plates- another 5mm or so larger on the bottom of the port, so if you use the lower cosmo intake as well you should port your FD plates to match.
The other difference is that the cosmo motor has substantially larger intake ports on the plates- another 5mm or so larger on the bottom of the port, so if you use the lower cosmo intake as well you should port your FD plates to match.
Senior Member
Joined: May 2002
Posts: 4,928
From: Okinawa, Japan
I'm assembling parts right now to put a 13B cosmo onto my FD. For optimum performance you'll need:
1) the 13B cosmo lower intake manifold gasket(so if you port your motor, port match it to the gasket)
2) 13B Cosmo lower intake manifold
3) 13B cosmo upper to lower intake manifold gasket
4) 13B cosmo upper intake manifold
5) 20B cosmo throttle body
6) throttle body elbow of your choice
7) 13B Cosmo fuel rail(or fabricate your own)
8) block off the ACV on the outside of the 13B cosmo lower intake manifold
You can use the FD throttle body, HOWEVER if you go this route, you will need to get rid of your idle control valve. The reason you want the 20B throttle body is 1) It's bigger. 2) It already has an idle control valve on it.
You will need to relocate your air temp sensor to the throttle body elbow(or you could tap the cosmo intake manifold) and you will need to take off your FD TPS and bolt it up to the 20B cosmo throttle body.
Not the hardest project in the world. I think the hardest thing will be to get the throttle cable to work.
1) the 13B cosmo lower intake manifold gasket(so if you port your motor, port match it to the gasket)
2) 13B Cosmo lower intake manifold
3) 13B cosmo upper to lower intake manifold gasket
4) 13B cosmo upper intake manifold
5) 20B cosmo throttle body
6) throttle body elbow of your choice
7) 13B Cosmo fuel rail(or fabricate your own)
8) block off the ACV on the outside of the 13B cosmo lower intake manifold
You can use the FD throttle body, HOWEVER if you go this route, you will need to get rid of your idle control valve. The reason you want the 20B throttle body is 1) It's bigger. 2) It already has an idle control valve on it.
You will need to relocate your air temp sensor to the throttle body elbow(or you could tap the cosmo intake manifold) and you will need to take off your FD TPS and bolt it up to the 20B cosmo throttle body.
Not the hardest project in the world. I think the hardest thing will be to get the throttle cable to work.
