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  #21  
Old 9th April 2018, 09:26 PM
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David's8 David's8 is offline
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You didnt disappoint MJ! I was waiting for the nightly update

What are doing with the old engine and LPG gubbins then?
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  #22  
Old 9th April 2018, 09:37 PM
MikkiJayne MikkiJayne is offline
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The LPG is going back on the new engine although it'll run on petrol until its properly run-in.

The old engine is going in my A4 racecar. Since it only uses oil under 3000rpm, a track car is the perfect new home for it
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  #23  
Old 9th April 2018, 10:28 PM
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Thanks MJ, your write ups are fascinating and I love seeing how you renew these cars.
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  #24  
Old 10th April 2018, 08:17 AM
Audidothat Audidothat is offline
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Quote:
Originally Posted by tonupkid View Post
......you renew these cars.
MJ

Do you get so heavily involved with the D3 S8? Engine replacements etc......

Anyway wonderfully informing posts, I love following these threads.
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  #25  
Old 10th April 2018, 09:00 AM
MikkiJayne MikkiJayne is offline
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Exclusively D2s
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  #26  
Old 10th April 2018, 09:04 AM
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Quote:
Originally Posted by MikkiJayne View Post
Exclusively D2s
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  #27  
Old 10th April 2018, 11:26 AM
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I like those injector cups! I thought you were going to have to change the inlet manifold over!

Quote:
Originally Posted by MikkiJayne View Post
nice clean oil
That's an LPG trait.
I ran an old VB Commodore (basically a 1980 Carlton body wise, with Holden mechanicals) on LPG for years.
10,000km oil changes and it always came out a slightly darker clear brown from the new clear amber it went in.
LPG burns nice and clean!
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  #28  
Old 10th April 2018, 11:28 AM
ainarssems ainarssems is offline
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Interesting LPG injector adaptors, look very neat but my first thought was that it is likely to affect petrol injectors with a possibility that petrol could end up on adaptor walls and run down instead of properly evaporating and mixing with air. It's just a theory but could be possible that liquid petrol ends up on cylinder walls and wash down oil making high oil consumption on otherwise healthy engine. I guess it's unlikely as petrol should evaporate well due to engine temperature anyway. If it was direct injection petrol or diesel engine I would be more worried but still something to consider.
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  #29  
Old 10th April 2018, 12:15 PM
MikkiJayne MikkiJayne is offline
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Hmm that's food for thought. In that scenario, would you expect it to cause permanently high oil consumption, or only when running on petrol? If its doing it temporarily as a consequence of disrupting the injector spray pattern then I would expect it would not burn oil when running on LPG (on the basis that the LPG doesn't wash the bores).

Given that it uses oil regardless of which fuel it's on, but only at low rpm, I wonder if it has been washing the bores when running on petrol and disrupted proper ring seal? That would be bad as it'll do it to the same to the new engine

That said, dodgy rings doesn't really correlate with the old engine being able to hit vmax. Wouldn't it be low on compression in that case and so also be down on power?
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  #30  
Old 10th April 2018, 12:40 PM
ainarssems ainarssems is offline
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I don't know, it was just a theory as those LPG adaptors cought my eye. I guess it could be just oil rings that are worn and compression rings still fine.

Oil consumption only on low revs is interesting, isn't it usually the other way round that oil consumption goes up with revs?
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