blakep82
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| posted on 31/8/08 at 06:19 PM |
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smoothing intake manifold
just been welding my manifold up (thanks Jason at short track  )
is there anything i can use on the insides of the tubes to smear round to smooth out the airflow (round tube, and the intake ports on the head
aren't round, you get the idea)
would need to be something soft that won't ruin the engine and valves if it fell in, and petrol resistant.
or an i worrying about nothing, will it not make much difference if there's a few bumps in there?
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Lars
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| posted on 31/8/08 at 06:30 PM |
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I used chemical metal.
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blakep82
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| posted on 31/8/08 at 06:36 PM |
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i thought of using that, wasn't sure if it would cause a problem if bits broke off and fell in?
bent valves etc?
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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mark chandler
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| posted on 31/8/08 at 06:46 PM |
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Epoxy resin, its even used inside cylinder heads to build up ports.
Just make sure whatever you use is petrol resistant and has a good key so it grips well/cannot fall out.
Regards Mark
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Lars
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| posted on 31/8/08 at 06:52 PM |
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well, I hope it wont fall off.
I have so far only driven around 80mi to SVA and back, and the manifold is still as designed.
It is petrol resistant and can handle the temps.
You can smooth it nicely with some sandpaper as well.
I would have thought that if it affected by heat/petrol it would slowly wear away rather than break off.
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blakep82
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| posted on 31/8/08 at 07:26 PM |
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i'll certainly be looking at epoxy resin and chemical metal tomorrow then 
lars, i was thinking perhaps vibation might take its toll, butr if the surface is keyed it should be fairly secure
the inside of mine's not too bad, but i did manage to blow a hole in one of the tubes right at the last bit  annoyed to say the least.
managed to build the weld up on the outside to fill the hole so not all lost, but its left a bit of a hole inside
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Lars
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| posted on 31/8/08 at 07:39 PM |
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I attached round 2" pipe onto a zetec manifold plate. THis meant that I actually used a fair bit of chemical metal. So I am not sure that even
if it broke loose that it would actually make it to the valves.
(In the worst case I fit my spare engine.)
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blakep82
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| posted on 3/9/08 at 06:33 PM |
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is chemical metal the same as epoxy resin?
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Cheffy
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| posted on 29/10/08 at 04:47 PM |
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Hi,
Hope I'm not hijacking the post, but on the same subject.....
Is there any reason that silicon cannot be used to seal holes in the TB's?
I am fitting GSXR 600 TB's to the ST170 manifold. I am going to mount the injectors in the manifold and therefore need to block the old injector
holes in the TB's. A 1p piece fits in the hole perfectly, so what is to stop me fixing the 1p in place with silicon. Also, the holes in the TB
sides where I have removed the secondry butterflies need filling. I propose to fit cut down cap heads into the holes from the outside and again fix
with silicon. This way there is no danger of anything breaking away and being drawn into the engine.
Is there any reason I cannot do it this way?
TIA,
Mart.
Farts are like Rock'n'Roll. You love your own but you hate everybody else's. Lemmy, Motorhead.
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blakep82
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| posted on 29/10/08 at 04:59 PM |
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lol no hijacking going on my manifold's done
if using silicone to fill an area the size of a 1p, i think the vacume created might pull the silicone out.
small peice of metal to cover the hole with a small overlap, then cover with 'chemical metal' maybe a better option?
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IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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DarrenW
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| posted on 29/10/08 at 05:04 PM |
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I usedJB weld to build up the inside of a manifold ive worked on before, this smoothed out well. i wouldnt use silicon. I joined my carbs to manifold
using silicon hose and it went mushy. i also know you shouldnt use silicon anywhere near a fuel tank so will probs be bad news in the manifold.
Doesnt silicon take out lambda sensors too in FI systems?
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Cheffy
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| posted on 29/10/08 at 09:36 PM |
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Cheers Guys, JB Weld it is then.
I just wondered about silicon because when I was racing karts about 20 years ago (blimey, am I that old!) we used to use silicon to seal the head
gaskets on the Villiers engines.
Blake82, sorry, I wasn't very clear. There's a lip inside the injector hole and a 1p sits inside the hole and rests on the lip perfectly.
I was going to fix the 1p in place with silicon rather than fill the entire hole with silicon.
Cheers,
Martin.
Farts are like Rock'n'Roll. You love your own but you hate everybody else's. Lemmy, Motorhead.
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Cheffy
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| posted on 29/10/08 at 10:35 PM |
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[img][/img]
Farts are like Rock'n'Roll. You love your own but you hate everybody else's. Lemmy, Motorhead.
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