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28 Posts Member #: 1503 Member Long Island, New York, USA |
17th Aug, 2010 at 12:02:39am
I'am running an Vmax Eaton 45 SC at about 11 pounds boost on my 1380cc. Since I had about 10.5 : 1 compression I was told to install a decomp plate with my standard head gasket, which I did. It appears I just blew the head gasket with only about 20 hours on the engine. What is the best head gasket for this application, and who sells it ??
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 1666 Posts Member #: 252 Post Whore Sunny suffolk |
17th Aug, 2010 at 12:15:55am
Can only suggest you dont use a decompression plate and aim to lower compression with larger combustion chambers or bigger dished pistons or a combination of both. With true sufaces on head and block the payen bk450 head gasket is fine. Other option is low boost high compression? -MINI CLUBMAN 1380 TURBO- |
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493 Posts Member #: 3894 Senior Member sallys gap. garden of Ireland |
17th Aug, 2010 at 12:22:05am
BK450 for me, Failing that the AF470, pretty much the same just has an additional O-ring for the oil-feed.
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493 Posts Member #: 3894 Senior Member sallys gap. garden of Ireland |
17th Aug, 2010 at 12:25:46am
On 17th Aug, 2010 T3Tone said:
Can only suggest you dont use a decompression plate and aim to lower compression with larger combustion chambers or bigger dished pistons or a combination of both. With true sufaces on head and block the payen bk450 head gasket is fine. Other option is low boost high compression? Agreed, beaten to it. If he has built already, then head work is the answer. But wallet is the decider. |
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 4641 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
17th Aug, 2010 at 08:59:37am
For the cost of a decompression plate & an extra gasket you could have the chambers worked. |
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50 Posts Member #: 9008 Advanced Member Lancashire |
17th Aug, 2010 at 09:17:25am
Check out Cometic Gaskets, I use them on a much bigger blown motor, they are bullet proof. I was really pleased to find they make them for A series and put one sraight on my mini. |
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 834 Posts Member #: 2017 Post Whore Warwick. |
17th Aug, 2010 at 10:11:16am
wouldnt quite say they were bullet proof, 1380rich on here managed to blow the gasket, the fail between the 2 cylinders then proceded to melt his block rendering it scrap David. |
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Site Admin  15302 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
17th Aug, 2010 at 10:36:50am
I would recommend having the chambers on the head worked for a permanent solution.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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 159 Posts Member #: 1997 Advanced Member Lichfield |
17th Aug, 2010 at 11:46:02am
On 17th Aug, 2010 imaginearat said:
Check out Cometic Gaskets, I use them on a much bigger blown motor, they are bullet proof. I was really pleased to find they make them for A series and put one sraight on my mini. neil slark recommended one for our mini, and thats what we have now, but you must have the block and head surface ground smooth, not just milled flat. |
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28 Posts Member #: 1503 Member Long Island, New York, USA |
17th Aug, 2010 at 01:44:33pm
Thanks All,
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50 Posts Member #: 9008 Advanced Member Lancashire |
17th Aug, 2010 at 10:50:39pm
On 17th Aug, 2010 mini93 said:
wouldnt quite say they were bullet proof, 1380rich on here managed to blow the gasket, the fail between the 2 cylinders then proceded to melt his block rendering it scrap OK point taken but I think that any other gasket would of probably failed sooner |
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 1596 Posts Member #: 8027 Post Whore Thrapston, Kettering, Northants NN14 |
18th Aug, 2010 at 01:43:39am
i too would recomend ditching the decomp plate. i have heard nothing but bad about them... have benross or turbophil work your head, itl be alot more benificial as the chamber shaper could be imroved aswell. On 17th Feb, 2011 apbellamy said:
I popped my first one out the other day... |
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834 Posts Member #: 2017 Post Whore Warwick. |
18th Aug, 2010 at 09:40:12am
yeah, pretty sure your also right there. some times things will happen no matter what you have, just about limiting the possibilitys :)
On 17th Aug, 2010 imaginearat said:
On 17th Aug, 2010 mini93 said:
wouldnt quite say they were bullet proof, 1380rich on here managed to blow the gasket, the fail between the 2 cylinders then proceded to melt his block rendering it scrap OK point taken but I think that any other gasket would of probably failed sooner David. |
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 300 Posts Member #: 1746 Senior Member Kent |
18th Aug, 2010 at 12:10:21pm
On 17th Aug, 2010 minimized said:
Thanks All, I think I'll just install a Cometic Head Gasket and see how that works out for now. I only have 3 more Auto X's this year and will hope that holds out. Just to be clear if you are using a decompression plate you WILL need two headgaskets, one for either side of teh decompression plate. Iv got a decompression plate fitted to my engine using a BK450 on both sides of the decompression plate and iv not had any headgasket problems...
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50 Posts Member #: 9008 Advanced Member Lancashire |
18th Aug, 2010 at 10:59:45pm
Look on the bright side you'll pay a lot less than we do over here! We pay VAT, Import Duty and delivery half way around the world for Cometics |
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2497 Posts Member #: 1954 Post Whore Luton Bedfordshire |
19th Aug, 2010 at 01:55:36am
Check his location may be cheaper buying a new head unless he is over on holiday On 18th Aug, 2010 Rick.SPI said:
i too would recomend ditching the decomp plate. i have heard nothing but bad about them... have benross or turbophil work your head, itl be alot more benificial as the chamber shaper could be imroved aswell. Own the day
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