Why put a fd intake on a fc?
my fc broke
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From: rohnert park,CA/ bay area
there have been debates but no power gains proven. its mostley if your going front mount. maybe for looks, maybe for the elbow, i think it looks better than just a regular FC UIM
my fc broke
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From: rohnert park,CA/ bay area
Rotorless
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From: Waihawa. Oahu. Hawaii
the debate between the manifolds is from the intake runners being more straight and longer, which gives a larger velocity
the reason i am doing this though, is to mount on an FD/20B TB...which , if you have ever seen those TB side to side with a FC TB, the FD/20B is about 2x the size..
that has a LOT more air flow...
the reason i am doing this though, is to mount on an FD/20B TB...which , if you have ever seen those TB side to side with a FC TB, the FD/20B is about 2x the size..
that has a LOT more air flow...
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From: n
Seondary throttle plates are the same size (50mm?), but the primary throttle plate is larger on the FD (45mm versus 50mm?).
I find this mod a royal pain in the ***, and I haven't seen proof it makes more power.
In theory, the shorter FC runners are better for top end power, but the longer FD runners are better for low end power.
-Ted
I find this mod a royal pain in the ***, and I haven't seen proof it makes more power.
In theory, the shorter FC runners are better for top end power, but the longer FD runners are better for low end power.
-Ted
I'm a boost creep...
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From: Auckland, New Zealand
Originally posted by frestylereaction
the debate between the manifolds is from the intake runners being more straight and longer, which gives a larger velocity.
the debate between the manifolds is from the intake runners being more straight and longer, which gives a larger velocity.
Originally posted by RETed
Seondary throttle plates are the same size (50mm?), but the primary throttle plate is larger on the FD (45mm versus 50mm?).
Seondary throttle plates are the same size (50mm?), but the primary throttle plate is larger on the FD (45mm versus 50mm?).
Last edited by NZConvertible; Feb 14, 2004 at 01:23 AM.
Originally posted by NZConvertible
...That's a ~15% increase in total cross-sectional area.
...That's a ~15% increase in total cross-sectional area.
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From: n
Originally posted by NZConvertible
Other way around. 45mm primary (same as FC), 50mm secondaries (FC's are 45mm). That's a ~15% increase in total cross-sectional area.
Other way around. 45mm primary (same as FC), 50mm secondaries (FC's are 45mm). That's a ~15% increase in total cross-sectional area.
Thanx for the correction!
-Ted
Originally posted by silverrotor
Amazing how when numbers are displayed like this, you realize there Is a significant difference b'n both TB's. This coupled with the axing of the AFM (should you go with a standalone EMS) suggests another reason as to why this Is a desireable mod. Despite the narrower runners found In the FD Intake tract. Hence, the pros and cons.
Amazing how when numbers are displayed like this, you realize there Is a significant difference b'n both TB's. This coupled with the axing of the AFM (should you go with a standalone EMS) suggests another reason as to why this Is a desireable mod. Despite the narrower runners found In the FD Intake tract. Hence, the pros and cons.
There would have to be before numbers and after numbers with no difference in tunning... would be the only way to resolve this issue... if someone is willing to donate a FD UIM with TB and TPS free of charge.. I would be glad to do this for the FC comunity
I agree... but there is a basic problem with this.
Really to do a reasonable comparison, you have to port match the FD upper to the FC lower, since no-one would really run it un matched... but then you've essentially ported teh FD upper, so the only way to be fair is to port the FC parts as well.
You would need two entirely different setups, an FC/FC ported setup with an FD/FC ported setup and it would be a (fairly) major deal to swap out both the UIM and LIM... that doesn't even count the fact that the TB inlet would be different between the two.
I totally agree that a true comparison needs to be done... but when you really consider the logistics of what it takens to make a reasonable comparison, it's quite involved.
FWIW, I intend to do this... just don't have the money right now.
-Chris
Really to do a reasonable comparison, you have to port match the FD upper to the FC lower, since no-one would really run it un matched... but then you've essentially ported teh FD upper, so the only way to be fair is to port the FC parts as well.
You would need two entirely different setups, an FC/FC ported setup with an FD/FC ported setup and it would be a (fairly) major deal to swap out both the UIM and LIM... that doesn't even count the fact that the TB inlet would be different between the two.
I totally agree that a true comparison needs to be done... but when you really consider the logistics of what it takens to make a reasonable comparison, it's quite involved.
FWIW, I intend to do this... just don't have the money right now.
-Chris
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