i was just wondering why people switch to FD intake manifolds? what benifits do you get out of it?

-Neil

 

I have heard everything from 30hp to not any noticable gain. I have never seen a before/after dyno done.

Daniel

 

Looks cool!

 

Aren't the ports larger? Which would allow more air creating that '30 extra hp'

 

Primary runners are smaller and longer than any TII manifold! More velocity for low end.

2ndary runners are same size as '89+ TII (~1mm larger than '87-88 TII).

It has a very straight intake path so it can be completely ported and polished w/ only an extension on your die grinder. This means it can have larger (and polished) runners w/ fairly little work.

The TB is larger than any TII.

 

Wow, that's it in a nutshell, ey?

 

I've thought about going to a 3rd gen intake also once I go to a FMIC. Anyone have any dyno sheets to show some sort of gain?

 

The primary throttle is the same (45mm) but the two secondary throttles are bigger (50mm vs. 45mm).

This is not the sort of mod that's worth contemplating unless you have serious upgrades planned (the stock UIM is fine for mild mods so the benifit is minimal) and have the time to put into the conversion. You also need to find solutions for the incompatible TPS and (for S4's) the lack of OMP linkage. Neither are huge problems but you do need to consider them.

 

So would it be worth comtemplating if I was gettin a rebuild with streetport, FMIC, and a T04? And how have people solved the TPS problem?

 

for a street car with basic mods? well...it's prettier...

 

So would it be worth comtemplating if I was gettin a rebuild with streetport, FMIC, and a T04? And how have people solved the TPS problem?

Since you will have to run a Haltech (or similar stand alone ECU) w/ the above mods-

the TPS would be a minor issue.

What it boils down to is how much do you enjoy fabricating items for your car? I love it, and this was the perfect opportunity to tinker.

If you are thinking from a HP perspective, there are SOOO many little mods that you can do to raise HP that no one bothers w/ because they aren't bolt on or its easier to just raise boost a little more.

Put this mod in the above catagory- it CAN give you more HP if done right and it can decrease your HP if done wrong.

 

I asked soleass awhile back and he said it was worth 25rhwp, ported ofcourse...

 

I asked soleass awhile back and he said it was worth 25rhwp, ported ofcourse...

 

i have herd that you need a s5 lim for it to fit a 3rd gen uim. the 3rd gen uim will not fit the s4 lim??? anybody know anything about this.

 

I know its true. And the S5 LIM can be finicky about wanting to be bolted to the FD UIM too.

 

for looks
for (some small?) HP gains
for more space under manifold (easier to work on fuel rails

 

Yup, just like Blue TII said... TB is larger

I did the FD thing bacause the S5 TPS's are F'n garbage....

 

Maybe I missed it(I did read it all) but will the FD intake bolt to a TII block? If not, what do you need to do to make it work?

 

You have to use the fc lower manifold still.
All you really need is and fd lower oil filler tube on the min side. You can get the fd tb to work with the s5 ecu I believe. I'm using a haltech e6x for mine. You either have to match the runners by proting and ovalize the mounting holes; the runners end up pretty thin if you do it that way, or there is an adapter plate availabe to make it easier. Check out this link.
http://www.teamfc3s.org/forum/showth...5&pagenumber=1

 

s5 and fd tps's are the same, its just a matter of slicing the wires

 

So the s5 tps bracket would mount to the fd intake?

 

no you splice the fd tps into the s5 harness

 

They are not the same TPS.

 

Why not a RE Cosmo Intake Manifold

 

check it out http://store.yahoo.com/rotorworks/feedfc-exchkit.html