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Author Somthing I've been wondering...
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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24th Nov 08 at 20:20   View User's Profile U2U Member Reply With Quote
... Since I had my exhaust fitted..

Why can't you get the normal 'noise' from a diesel that you can from a petrol?

I mean, Compare mine to Starlet 1.3 turbo and the noise will be completly different! So an explanation would be great [/stupid question]

[Edited on 24-11-2008 by Scatt]
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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24th Nov 08 at 20:22   View User's Profile U2U Member Reply With Quote
I'm kind of thinking down the - Induction - Compression - Power - Exhaust route...
SAL
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Registered: 19th Dec 05
Location: Radlett, Hertfordshire
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24th Nov 08 at 20:22   View Garage View User's Profile U2U Member Reply With Quote
all about the rate of gas release
daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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24th Nov 08 at 20:23   View Garage View User's Profile U2U Member Reply With Quote
i think its because of the diesel pump.
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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24th Nov 08 at 20:35   View User's Profile U2U Member Reply With Quote
Petrol uses spark plugs, diesel uses glow plugs?

Different combustion method and fuel, different noise and colour of smoke coming out
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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24th Nov 08 at 20:36   View User's Profile U2U Member Reply With Quote
Glow plugs are used to warm the combustion chamber up so it'll start easier.
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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24th Nov 08 at 20:48   View User's Profile U2U Member Reply With Quote
Edited to say,

I thought glow plugs were what heated up diesel to ignite, just found out it's air being compressed that heats up. Good link for anyone that's interested: http://www1.eere.energy.gov/vehiclesandfuels/pdfs/basics/jtb_diesel_engine.pdf

Sorry Scatt-man bee bup bup buddibup

[Edited on 24-11-2008 by alan-g-w]
Mike
Organiser: North West and North Wales
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Registered: 20th May 06
Location: nr. Skipton, North Yorkshire
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24th Nov 08 at 20:51   View Garage View User's Profile U2U Member Reply With Quote
compression
Kurt
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Registered: 23rd Oct 05
Location: Hi
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24th Nov 08 at 20:54   View User's Profile U2U Member Reply With Quote
Why dont diesels rev as high either?
dan-sport
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Registered: 9th Oct 07
Location: Bushbury, West Midlands
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24th Nov 08 at 20:56   View User's Profile U2U Member Reply With Quote
they don't rev high so they last longer
Jake
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Registered: 24th Jan 05
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24th Nov 08 at 21:00   View User's Profile U2U Member Reply With Quote
partly because the combustion process takes longer in a diesel than it does in a petrol engine so it limits the amount of revs
Matt L
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Registered: 17th Apr 06
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24th Nov 08 at 21:04   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Kurt
Why dont diesels rev as high either?


honda are/were working on that by making a tdi type r which has vtech
Scotty C
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Registered: 6th Nov 05
Location: Kidderminster Drives: 1.6 16v Sport
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24th Nov 08 at 21:05   View User's Profile U2U Member Reply With Quote
I just assumed as 99.9% of diesel engines produce most their power under 3k, so there is no point taking them to 7k...

[Edited on 24-11-2008 by Scatt]
Jake
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Registered: 24th Jan 05
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24th Nov 08 at 21:07   View User's Profile U2U Member Reply With Quote
yeh the compression in them is much higher, but because it takes much longer to burn the diesel, the engine cant rev as high

 
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