oadamo
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| posted on 23/8/10 at 12:11 PM |
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steel vs aluminum inlet manifold
ive seen a lot of custom manifolds made from aluminum on turbo motors but what is the real benifits vs steel. i no theres the weight factor but i
would of thought you could use a thin gauge steel vs 3-4mm aluminum and the weight would be about the same. but then theres the heat factor ?? is
there any real problem.
is there anyone on here running a steel inlet are you seeing any problems.
adam
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Howlor
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| posted on 23/8/10 at 12:40 PM |
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Alot of OE engines run a plastic manifold so I would have thought that heat was no issue.
Steve
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02GF74
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| posted on 23/8/10 at 01:02 PM |
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only reason I can think of is that maybe corrosion (read rust), if using mild steel, may be an issue.
air contains moisture (read water) so given enough time, will corrode the surface.
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coozer
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| posted on 23/8/10 at 01:07 PM |
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I would say its just much easier for the home builder to fab up something out of steel. Not every one has a tig for welding ali...
1972 V8 Jago
1980 Z750
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omega0684
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| posted on 23/8/10 at 01:43 PM |
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have you ever tried porting steel! 
Cast ali and then port to match inlets for more efficient breathability i say
I love Pinto's, even if i did get mine from P&O!
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Bluemoon
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| posted on 23/8/10 at 03:12 PM |
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quote:
Originally posted by omega0684
have you ever tried porting steel!
Cast ali and then port to match inlets for more efficient breathability i say
True but you would fabricate it nothing to stop you matching up the ports by design, all be it more difficult.
The ones I have seen (ali or steel) are just pipes welded to a plates..
Casting a ali inlet at home is not that DIY an approach (it could be done but would be a lot of efffort, you would have to make your own forge! but
you would also need a mill to finish it off!).
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tonym
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| posted on 23/8/10 at 03:53 PM |
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Icing up can be a problem with steel.
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trikerneil
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| posted on 23/8/10 at 06:26 PM |
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quote:
Originally posted by tonym
Icing up can be a problem with steel.
Any idea why?
I'm halfway through a steel inlet manifold build myself
Neil
ACE Cafe - Just say No.
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Bluemoon
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| posted on 24/8/10 at 12:28 PM |
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quote:
Originally posted by trikerneil
quote:
Originally posted by tonym
Icing up can be a problem with steel.
Any idea why?
I'm halfway through a steel inlet manifold build myself
Neil
Ali is a much better conductor (i.e. it will be heated by the head I guess). If you had a problem I suppose you could wrap some 8mm micro bore pipe
into the cooling system to warm them up a bit maybe with a valve so you can set the amount of extra heat (in fact a electric fiesta heater valve would
be perfect, you could have a switch on the dash)?
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lotusmadandy
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| posted on 24/8/10 at 02:29 PM |
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I have been running a steel inlet for 2 years now with zx9r carbs and have no corrosion heat or icing problems.
Andy
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rusty nuts
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| posted on 24/8/10 at 06:19 PM |
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I made my inlet manifold from a piece of 12 mm ally plate and off cuts that I already had . Cutting to shape was easy using a woodworking coping saw
and plenty of cutting fluid
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FASTdan
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| posted on 25/8/10 at 09:04 AM |
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I have experienced massive icing on stainless steel inlet (pinto on ZX9's). Mid winter, there was literally a frost coating the headers - quite
unbelievable to see.
Whereas as has been mentioned alu soaks up heat far better and retains it for much longer.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Bluemoon
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| posted on 25/8/10 at 12:43 PM |
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quote:
Originally posted by FASTdan
I have experienced massive icing on stainless steel inlet (pinto on ZX9's).
... And stainless steel is a worse conductor than steel so icing would be worse still.
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