Why are the UIM/LIM so thick?
#1
I live in an igloo
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Why are the UIM/LIM so thick?
oooo, questions tonight.
Just curious but why has mazda made them out of cast iron it seems? I mean wouldn't it be better if they would have just fabricated it out of a real thin piping to reduce weight and give better airflow?
Are they thick becuase it protects the AF mixture from heat? or are they thick to prevent corrosion?
just curious.
Just curious but why has mazda made them out of cast iron it seems? I mean wouldn't it be better if they would have just fabricated it out of a real thin piping to reduce weight and give better airflow?
Are they thick becuase it protects the AF mixture from heat? or are they thick to prevent corrosion?
just curious.
#2
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They are cast out of aluminum. I believe the reason for casting them so thick is because the casting process is relatively simple, and isn't very perfect at all. Having them thick leaves room for imperfections...?
#3
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What I was thinking of doing was to fabricate my own manifold thats got a better airflow and is made out of some exhaust piping. That and some flanges on both ends that just bolt on to the block and the TB. Right now its just all thoughts and dreams, but if I think about it enough I'll do it.
thats not what this thread is about though, im just trying to understand the benefits of making the manifolds out of casted aluminum. So far I can see that its an easier fabrication process.
thats not what this thread is about though, im just trying to understand the benefits of making the manifolds out of casted aluminum. So far I can see that its an easier fabrication process.
#4
...94% correct.
Casting is cheap. Super cheap. Steel manifolds would require more on-hand labor. Cast material also handles heat and rapid temperature changes a lot easier. Heavy duty parts will also last longer. Did I mention it's cheap?
#6
Former Moderator. RIP Icemark.
Originally Posted by BlaCkPlaGUE
But in terms of performance between the two (suceptable to heat, or stress, or anything) its pretty much the same?
BTW: GM uses Plastic for intake runners on some of their lower reving V6 and V8 cars, but I wouldn't expect it too hold up as well on a rotary engine.
#7
Originally Posted by Icemark
The aluminum shrugs off the heat much much better than steel and is slightly weaker (when comparing density), but is about 1000% easier to fabricate (including any process work needed for mating parts or assembly).
BTW: GM uses Plastic for intake runners on some of their lower reving V6 and V8 cars, but I wouldn't expect it too hold up as well on a rotary engine.
BTW: GM uses Plastic for intake runners on some of their lower reving V6 and V8 cars, but I wouldn't expect it too hold up as well on a rotary engine.
Its a great idea for non-boosted cars, it shrugs off more heat than aluminum, and is much lighter too.
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#8
Former Moderator. RIP Icemark.
Originally Posted by BDoty311
Ford uses plastic aswell, I've seen it on Mustang GTs, ZX2s, and Focuses. My dads WS6 even has plastic intake runners.
#9
I don't know if this has anything to do with it, but when the FC was being designed, each team had to shave a certain amount of weight off of the parts they were in charge of in order to lighten the car as much as possible. Of course aluminum is lighter than steel, and it may have been made that way in order to shave weight.
-Joe
-Joe
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Originally Posted by Lodivigo
Doesn't the RX-8 use a plastic intake manifold?
The path many 350Z owners are now taking to upgrade the plenum is by going with the one company that makes their model out of metal
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