Intake runner diameter FE3 build.
 

I'm doing something completely silly. Putting a FE DOHC FE3 motor out of a Kia Sportage adding a turbo and putting it in a 1990 B2200 pickup to be used as a daily driver farm truck.

Fiddling with the intake manifold got to mess with it to get rid of the air shrouded injectors and was thinking of using the full Kia bottom half of the manifold and flanging it to a 1.6l miata manifold. got to figur out how much room I got to the hood but there is allot more than a Miata. I was kind of shocked how small the runner diameters are on the Kia manifold about 35mm, NB2 BP manifold is ~42mm by comparison. and they are even smaller than the 1.6l Miata manifold. Wonder if that is small enough to choke the top end some? kind of surprising for a 2.0l motor.

People usually make runner diameters bigger. what happens if you go smaller? how much difference?

I'm thinking for this project I don't really need to squeeze everything out of it so Ill just make it work just curious.

I don't know maths, but i've seen people adapt SR20 intake manifolds to that. I'd do it just because the aftermarket ones look cool.

Also: Get a B2600i trans/trans crossmember/rear end to put in that thing. The B2200 stuff isn't going to be super happy, and you seem to shred enough transmissions in your Miata. ;)

If the runner diameter is smaller I would imagine you would have an increase in low end torque but less power up top. This could be advantageous on a farm truck where maybe low end torque is preferred.

Here's the solomiata hybrid B6/Kia FE3 intake manifold. This fit under the Miata hood with some of the bracing notched and a relatively high engine height. It made 280ftlbs/300whp with a 60AR/50trim T4, 48AR Stage III T3 turbo, 1.6 Miata TB, internal WG, 3" exhaust, MiataLINK ecu. I do think the tiny plenum was hurting top end, as torque fell off pretty bad over 6k.

http://fe3miata.com/site/wp-content/...e-mani01-1.jpg
http://fe3miata.com/site/wp-content/...e-mani02-1.jpg
http://fe3miata.com/site/wp-content/...e-mani03-1.jpg
http://fe3miata.com/site/wp-content/...e-mani04-1.jpg
http://fe3miata.com/site/wp-content/...old-hood01.jpg

I have a Miata 6 speed transmission slight modifications to the bellhousing will make it bolt up. there are already two holes in the bellhousing that arnt used on a BP block that line up and some other features line up with the alignment pins. Bit of welding and some new holes it will work. I have a tail stock from a Silvia SR20 6 speed. bolts to the Miata transmission and shift mechanism works. it has the trans mount on it that puts it in the same location as a B2200 transmission and the shifter is a couple inches further forward and is taller which puts it in a nice place in the truck. the one picture shows the 6 speed bell housing fit up and it has an input shaft in it as well.

6 speed truck.

Well that's fun. But what happens when you want to make power? :P

I spin tires. it will be a daily driver on likely all seasons. stock 5 speed I believe will be useless grenade even with all seasons but the 6 speed I think should do it. And it will have sweet gear ratios for daily driving.

I can get behind that. Can you please document transmission things well? :)

This sounds like a really fun farm truck!