SALAD
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| posted on 1/5/12 at 09:58 PM |
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Engine mounting
I made a bit of progress today and I now have the engine in the car, sat ready for the engine mounts to be made.
The engine sits very close to square in the engine bay and almost level left/right, front/rear. The prop has a nice bit of angle to it
horizontally.
Initially I had a complete floor covering the entire bottom of the chassis and I have now cut out a hole for the sump.
The gearbox still has flooring underneath it and it is touching but if the floor was not there the grearbox wouldn't sit any lower as the mount
is where it needs to be.
So, will there be much vibration / problems having the floor touching the gearbox?
Also, related to vibration and movement, the gear stick mounting at the tail end of the box is pretty close to the top tunnel rails and my fuel and
brake lines.....how close is too close?!
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adithorp
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| posted on 1/5/12 at 10:45 PM |
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If the bellhousing is resting/touching the floor then I'd expect it to act like a sounding board/drum and amplify any noise quite badly.
The rear of the gearbox can move quite a bit on standard rear mountings when going on and off power. How close is it? You realy don't want it
hitting either brake or fuel lines. Can you re-route them a bit?
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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SALAD
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| posted on 1/5/12 at 10:51 PM |
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The bellhousing isn't touching the floor, just the bottom of the gearbox.
There is about 5mm between the end of the box and the lines.....I will put a picture up tomorrow but I can't really re-route them.
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SALAD
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| posted on 2/5/12 at 06:06 PM |
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Didn't manage to go and get pictures today but is 5mm clearance OK?
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adithorp
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| posted on 2/5/12 at 06:47 PM |
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5mm might be enough but I'd want more. Fuel and brake line failure is too serious to risk IMO.
Whether it's the bellhousing (my misunderstanding) or the box itself it'll still transfer and amplify a lot of noise I'd expect.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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SALAD
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| posted on 2/5/12 at 06:55 PM |
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OK, I could cut some more flooring out from under the gearbox......was tring to have as flat a floor/underside as possible! 
I'm not sure how I could get more clearance on the pipes. Other people must be running their pipes along the top tunnel rail and have a type 9
gearbox sat close to them.......??
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SALAD
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| posted on 2/5/12 at 07:18 PM |
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laptoprob
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| posted on 3/5/12 at 07:03 AM |
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I have the same setup in my Avon.
IMO the pipes will only stand a chance of being ok if you use a very good mount like eBay - The UK's Online Marketplace or
you will get sufficient movement to burst one.
I used to use a std type 9 rubber mount and on track the gearbox moved a good 10mm either way.
I now use a Caterham type 9 mount which is holding it very steady.
To be fair like Adi says i wouldnt risk it for the sake of re-routing it lower down where movement is minimal.
As for vibration due to the gearbox touching.....i would tend to think it will make for a horrible driving experiance
Just lower the box a little and let it pop through the floor.
[Edited on 3/5/12 by laptoprob]
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SALAD
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| posted on 3/5/12 at 09:13 PM |
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I have now chopped out more of the floor in the engine bay and underneath the gearbox so the engine and box both sit lower and I am now clear of the
pipes.
So if there is excessive movement the tail of the box will hit the chassis / tunnel and not the pipes. That is unless the gear lever extension that I
don't have yet is tall enough to cause a problem again....
The sump sits about an inch below the chassis rail now.
I will have to attach the gearbox mount to the plates in the tunnel from the underside as opposed to the mount sitting on top of the plates, possibly
with a spacer inbetween the two.
Will this be OK?
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laptoprob
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| posted on 4/5/12 at 06:15 AM |
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quote:
Originally posted by SALAD
I have now chopped out more of the floor in the engine bay and underneath the gearbox so the engine and box both sit lower and I am now clear of the
pipes.
So if there is excessive movement the tail of the box will hit the chassis / tunnel and not the pipes. That is unless the gear lever extension that I
don't have yet is tall enough to cause a problem again....
The sump sits about an inch below the chassis rail now.
I will have to attach the gearbox mount to the plates in the tunnel from the underside as opposed to the mount sitting on top of the plates, possibly
with a spacer inbetween the two.
Will this be OK?
If i get a moment later i will take a pic of how mine is mounted.
Mine too is bolted from underneath as are most. To bolt from the top would mean that you must have a car with a very deep tunnel!
Ive just had a quick look at your pics and reckon your engine looks very high in the chassis.
Have you tried to body/bonnet on yet?
[Edited on 4/5/12 by laptoprob]
[Edited on 4/5/12 by laptoprob]
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SALAD
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| posted on 4/5/12 at 08:23 AM |
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The engine is lower than that, now I have chopped more floor out. Should be OK for the bodywork I think.
If you did have a picture of how yours is mounted it might put my mind at ease and I will stop being so indecisive and get on with finishing the car!
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laptoprob
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| posted on 4/5/12 at 03:13 PM |
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U2U me your email mate please.
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