fibreglass inlet manifold
02-09-2009, 05:39 PM
#7
I've found that life I needed.. It's HERE!!
when did u ever see anything in fibreglass that did not crack eventually ?
the heat/vibration would kill it very quickly imo
dunno about u but i would not want it going into my engine
the heat/vibration would kill it very quickly imo
dunno about u but i would not want it going into my engine
Trending Topics
02-09-2009, 05:53 PM
#8
PassionFord Post Whore!!
Thread Starter
ive only ever seen bonnet and boot lids in fibreglass tbh but thats a different kettle of fish. i dont think just high frequency vibrations like that from an engine would crack fibreglass, i recon done properly, and perhaps re-enforced with wire mesh where possible, there'd be no issues there.
02-09-2009, 07:25 PM
#11
I think that the continual flexing from the changes in pressure might be an issue, but cracks arent really the end of the world if you then just make another one, only way it would be a bad problem is if anything flaked off and jammed a valve open or similar.
02-09-2009, 07:29 PM
#12
PassionFord Post Whore!!
Thread Starter
cant see how anything could flake off tbh? think you might be right about the constant heat cycles but the only way to know would be to do one and see...
edit
missread that as heat not pressure. id imagine 5 or 6mm thick fibreglass over such small areas wouldnt flex THAT much would it?! on a n/a motor there wouldnt be any positive pressure trying to blow it to bits, just lower pressure trying to suck it in on itself.
would need doing just to see i supose...
edit
missread that as heat not pressure. id imagine 5 or 6mm thick fibreglass over such small areas wouldnt flex THAT much would it?! on a n/a motor there wouldnt be any positive pressure trying to blow it to bits, just lower pressure trying to suck it in on itself.
would need doing just to see i supose...
Last edited by xr-stu; 02-09-2009 at 07:31 PM.
02-09-2009, 07:40 PM
#14
PassionFord Post Whore!!
Thread Starter
yeah i missread.
still with a fibreglass manifold there could potentially be no weak points or stress points such as sharp corners or welds etc. and alluminium, or metal in general, would be much more suseptable to fatigue failures than a composite.
still with a fibreglass manifold there could potentially be no weak points or stress points such as sharp corners or welds etc. and alluminium, or metal in general, would be much more suseptable to fatigue failures than a composite.
02-09-2009, 07:48 PM
#18
His driveshafts were gun drilled too, proper engineering porn for the whole thing!
02-09-2009, 07:50 PM
#20
I've found that life I needed.. It's HERE!!
Join Date: Sep 2006
Location: Hertfordshire
Posts: 1,217
Likes: 0
Received 0 Likes
on
0 Posts
02-09-2009, 07:56 PM
#24
Advanced PassionFord User
That particular one was made when C/F was very expensive about 10 years ago and was made from the same material as the person making it used when doing F1 car tubs, IIRC it would retail at about 9 grand at the time if you were to buy one, so a bit over the top, but it was a no compromise build.
His driveshafts were gun drilled too, proper engineering porn for the whole thing!
His driveshafts were gun drilled too, proper engineering porn for the whole thing!
can you please explain "gun drilled "
Thanks
02-09-2009, 08:09 PM
#30
Because when it twists (which shafts do in use) fractures often work out from the centre, this way the stresses effect it less, Im afraid I am not a metalurgist though, so cant give you the exact details of how and why, I just know that is what happens.
02-09-2009, 11:26 PM
#33
I've found that life I needed.. It's HERE!!
you may well get away with a fibreglass intake scoop but not the actual manifold its self (which i think u mean't?)
how does fibre glass react to fuel btw? but there must be a reason why all manifolds are alloy or plastic i am guessing reliability.
the fibreglass would be a handy way of making a mould for a alloy copy though and maybe to experiment with designs
now we want you to try it for us
how does fibre glass react to fuel btw? but there must be a reason why all manifolds are alloy or plastic i am guessing reliability.
the fibreglass would be a handy way of making a mould for a alloy copy though and maybe to experiment with designs
now we want you to try it for us
03-09-2009, 01:08 PM
#34
PassionFord Post Whore!!
Thread Starter
the reaction to fuel was something i hadnt thought of actually, im sure theres a resin you could get thatd be ok though, same as some plastics can stand petrol some cant...
i might give it a go just to see what happens.
i might give it a go just to see what happens.
03-09-2009, 01:20 PM
#35
Too many posts.. I need a life!!
ive never seen a fiberglass inlet there must be a reason y i think particles will come off and beak up slowly and ud never even now till it was to late but u seem determind this will work so try it and let us know how it goes and i dont think fiberglass is stronge rthan carbon or they would make things out of it
03-09-2009, 01:24 PM
#37
I've found that life I needed.. It's HERE!!
Martin schanke used carbon inlet on rallycross cars, but they crack sometimes.
It`s also some Cosworth engine in Norway whit a copy of mis inlet, in carbon, like ex Hafsengens car
It`s also some Cosworth engine in Norway whit a copy of mis inlet, in carbon, like ex Hafsengens car
03-09-2009, 01:30 PM
#39
PassionFord Post Whore!!
Thread Starter
i didnt say fibreglass is stronger, just easier to work with than carbon fibre.
tbh i just think the cracking and bits breaking off thing wouldnt be as much of a problem as some people might think, fibreglass is strong stuff, flexible and doesnt suffer from fatigue like metals do. fair enough, IF it cracked then thered be an issue, obviously, but i think itd take alot to crack one. back fire yeah, thatd probably do it. how often does that happen though when the engines already setup and timing is right?
tbh i just think the cracking and bits breaking off thing wouldnt be as much of a problem as some people might think, fibreglass is strong stuff, flexible and doesnt suffer from fatigue like metals do. fair enough, IF it cracked then thered be an issue, obviously, but i think itd take alot to crack one. back fire yeah, thatd probably do it. how often does that happen though when the engines already setup and timing is right?