How loud is a bike engine, without exhaust system, while i am waiting for my manifold, i thought i could get the engine set up and see if i can start
it, what do you fellas think.
Brad
wow very very very loud
I started my old pinto with out exhaust system, and that popped and farted like hell, just wondered if a bike engine is as bad.
yeah its loud saying that its doable...
see this 
Rescued attachment FirstStart in chasis.JPG
if you have the bike manifold then sometimes this can be fitted upside down, or at least a short tube to take some heat a few inches from your engine bay.
http://www.youtube.com/watch?v=OpXwzbZ95hY
I reckon that my silencer reduces the noise by 35dB. At idle, the exhaust noise is 87 dB. Without the silencer that would make it 123 dB. Without
the manifold, when I first started my engine. It was LOUD
I built my car in my 80 year old neighbours garrage at the bottom of her garden. When I started my car for the first time, she jumped clear out of
her arm chair in her sitting room.
quote:
Originally posted by JoelP
if you have the bike manifold then sometimes this can be fitted upside down, or at least a short tube to take some heat a few inches from your engine bay.
love it i was just looking for my picture like that, but it seems lost in the ether
here's another one, V12!
http://www.youtube.com/watch?v=iXdqhDmZipE
WOW! That's the only engine I've seen where you can check the firing order visually!
I'd say it'd be pretty loud....
My V4 is loud enough even with the silencers on and it's got twin STM cans so theoretically twice the silencing of a single can system....
Still- it'd be rude not to fire it up just to see what it sounds like 
quote:
Originally posted by JoelP
love it
My V6 had fannymoulds fitted but was still a bit loud!
I've ran the pinto and the v6 with no manifolds, sound nice. Look down the exhaust outlet, on mine you can see into the cylinder pure flames
[Edited on 20/4/07 by Mr Whippy]
Mind you dont singe your eyebrows !!!
I ran mine without a silencer and it was 'kin loud!
Be very careful if you try it i did mine without manifold for first trial
turned it over several times no joy tried and tried decided to change plugs to see if it would work,knelt behind dash for throttle pushing start
button and it fired popped head from behind dash and was greeted with a pile off flames excess petrol was all over body
major brown trousers time really lucky hose pipe at the ready still scortch marks on inside of body but so close to losing the lot i felt 