JacksAvon
|
| posted on 27/10/14 at 06:09 PM |
|
|
Solid engine mounts
Dear collective brain......
I have used solid engine mounts (steel) on previous formula cars.
Has anyone any experience of using them on 7 type race cars please.
Regards
Jack
|
|
|
|
|
tegwin
|
| posted on 27/10/14 at 06:25 PM |
|
|
This is going to depend heavily on what engine you intend to use.... BEC boys are usually solid mounted as per a bike... but a vibrating car engine
isn't really the best of things to be mounted solidly... I think a chap on here tried it with a big engine and couldn't touch the
gearstick due to the vibrations...
------------------------------------------------------------------------------------------------------------------------
Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
|
|
|
loggyboy
|
| posted on 27/10/14 at 06:44 PM |
|
|
Even the properly mounted BECs use polybushes IMO.
Would shake your typical 7 chassis to pieces, unless you want to add more weight reinforcing the chassis, which would likely negate any performance
gained from solid mountings.
if you are going big power, 2 engine, one gearbox and an engine brace at high level should suffice.
Mistral Motorsport
|
|
|
theprisioner
|
| posted on 28/10/14 at 09:30 AM |
|
|
I have both, that is a Westfield Megabusa and a Sylva J15/Sigma.
The J15 kit came with more or less solid mounts and it was a nightmare when I first drove it, I thought the chassis was going to disintegrate and me
with it. Apparently fitted with a road cam'd Ford Sigma engine and solid mounts is the worst combination possible. I had to retrofit flexible
engine mounts.
On the Westfield BEC the mounts are solid. This is relatively normal for a BEC track car. However if I were using it on the road I would probably fit
mounts. The transfer of vibration is considerable but as the frequency 12K max revs (lower mass flywheel) appears to makes the problem less urgent,
also I am usually wearing a helmet. I suspect if I tuned the Hayabusa like I did the Sigma the problem may get far worse. Tuned engines tend to
vibrate more I am told.
Hope this helps
[Edited on 28/10/14 by theprisioner]
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
|
|
|
JacksAvon
|
| posted on 28/10/14 at 04:15 PM |
|
|
Thanks for the input chaps.
Rubber mounts for me then
|
|
|
