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Author Topic: Valve timing and fuel economy  (Read 2095 times)

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JamesV6CDX

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Valve timing and fuel economy
« on: 10 August 2008, 20:37:05 »
Currently economy is low.

Checked cambelt setup, cams 1 and 2 were about half a tooth too retarded, and cams 1 and 4 a couple of mm too advanced.

Likely to make a difference, or not? Some say a lot, some say none - what's your opinion?
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Lazydocker

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Re: Valve timing and fuel economy
« Reply #1 on: 10 August 2008, 20:39:56 »
I reckon you'll notice a difference... You'll be able to drive far more smoothly with the timing spot on  :y :y :y
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tunnie

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Re: Valve timing and fuel economy
« Reply #2 on: 10 August 2008, 20:40:22 »
half a tooth? hardly make a differnce really. other factors affect mpg, tyre pressure, breathers, oil changes and so on...

can't see 1/2 tooth making a difference.  :-/
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STMO123

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Re: Valve timing and fuel economy
« Reply #3 on: 10 August 2008, 20:41:32 »
Economy not too good? On a 3 litre V6? Noooooo....... ;D
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JamesV6CDX

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Re: Valve timing and fuel economy
« Reply #4 on: 10 August 2008, 20:42:03 »
Quote
half a tooth? hardly make a differnce really. other factors affect mpg, tyre pressure, breathers, oil changes and so on...

can't see 1/2 tooth making a difference.  :-/

In which case - why isn't it OK to setup valve timing without the kit ;)

(You can easily get it within half a tooth by eye, but many would say that's a no no!)
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JamesV6CDX

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Re: Valve timing and fuel economy
« Reply #5 on: 10 August 2008, 20:42:35 »
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Economy not too good? On a 3 litre V6? Noooooo....... ;D

Lol you silly old man, I am comparing with other 3.0 V6's I have owned :P
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Taxi_Driver

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Re: Valve timing and fuel economy
« Reply #6 on: 10 August 2008, 20:42:59 »
Me thinks it maybe to do with James has a 3L.......and he's having fun with the 'loud' pedal  :y :D
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markey mark

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Re: Valve timing and fuel economy
« Reply #7 on: 10 August 2008, 20:43:04 »
the timing is more for perfornance james and will help economy if it is spot on bud ! :y
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STMO123

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Re: Valve timing and fuel economy
« Reply #8 on: 10 August 2008, 20:43:27 »
Quote
Quote
Economy not too good? On a 3 litre V6? Noooooo....... ;D

Lol you silly old man, I am comparing with other 3.0 V6's I have owned :P


So you're getting 18mpg instead of 19? ;D ;D ;D
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JamesV6CDX

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Re: Valve timing and fuel economy
« Reply #9 on: 10 August 2008, 20:43:44 »
Also tunnie - I'd have thought cambelt setup being correct would have had a lot more impact on efficiency than changing the oil...  :-/
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JamesV6CDX

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Re: Valve timing and fuel economy
« Reply #10 on: 10 August 2008, 20:44:29 »
Quote
Me thinks it maybe to do with James has a 3L.......and he's having fun with the 'loud' pedal  :y :D

Steady 70mph run give 25 mpg - we all know they will do over 30 in these conditions..  so something is amiss.
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TheBoy

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Re: Valve timing and fuel economy
« Reply #11 on: 10 August 2008, 20:45:05 »
Quote
Currently economy is low.

Checked cambelt setup, cams 1 and 2 were about half a tooth too retarded, and cams 1 and 4 a couple of mm too advanced.

Likely to make a difference, or not? Some say a lot, some say none - what's your opinion?
That doesn't make sense.
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STMO123

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Re: Valve timing and fuel economy
« Reply #12 on: 10 August 2008, 20:45:06 »
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Also tunnie - I'd have thought cambelt setup being correct would have had a lot more impact on efficiency than changing the oil...  :-/

I remember when Tunnie and James didn't know their borehole from their a***hole ;D ;D ;D
« Last Edit: 10 August 2008, 20:45:23 by STMO123 »
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JamesV6CDX

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Re: Valve timing and fuel economy
« Reply #13 on: 10 August 2008, 20:46:02 »
Quote
Quote
Currently economy is low.

Checked cambelt setup, cams 1 and 2 were about half a tooth too retarded, and cams 1 and 4 a couple of mm too advanced.

Likely to make a difference, or not? Some say a lot, some say none - what's your opinion?
That doesn't make sense.

What doesn't? I thought it was quite a clear question?  ::)
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TheBoy

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Re: Valve timing and fuel economy
« Reply #14 on: 10 August 2008, 20:46:39 »
Quote
Also tunnie - I'd have thought cambelt setup being correct would have had a lot more impact on efficiency than changing the oil...  :-/
Both can affect running, and both are part of the standard service schedule.
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Grumpy old man
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