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 1346 Posts Member #: 2340 Post Whore Dublin Ireland |
25th Aug, 2008 at 04:40:26pm
Ok lads I had a head gasket fail on one of my race engines I would very much appreciate you opinion as to why this gasket failed the spec of the engine is N/A 1380cc running 13.8:1 static compression ratio with 310 deg cam the engine is a 5 port with Mega jolt and runing top spec race fule 110 octane. the engine came straight from dyno and completed 15 mins of race time befour complete failure in a spectacular fashion,
On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers. ______________________________________________________ |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
25th Aug, 2008 at 06:50:04pm
I would say thats detonation On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
25th Aug, 2008 at 06:51:04pm
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=198067 On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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 4559 Posts Member #: 786 Post Whore Bermingum |
25th Aug, 2008 at 07:09:52pm
Hi,
VEMs Authorised Installer / Re-seller. K head kits now available!
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1346 Posts Member #: 2340 Post Whore Dublin Ireland |
25th Aug, 2008 at 07:13:30pm
Yes this car has two mini rads one at each side of the car the heater hole is blocked off and a 1" hole drilled in the side of the head something like the dry deck setup except for it runs trough a full mini rad and back to the water pump
On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers. ______________________________________________________ |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
25th Aug, 2008 at 08:07:05pm
this is a good read
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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 2909 Posts Member #: 83 Post Whore Glasgow, Scotland |
25th Aug, 2008 at 11:12:52pm
id say pre-ignition they way its blasted right thro the gasket, had a similar mode of failure when i shot for some very silly boost, cylinder temperatures rose massively but the pistons remained undamaged. usually wiht detonation there is signs of errotion on teh pistons jstu above teh 1st ring. assumign this is a race engien with strong pistons and a sloppy fit in the bore, pre-ignition is unlikely to melt them or make them expand enough to sieze in teh bore, next weakest link is the gasket.
Edited by evolotion on 25th Aug, 2008. turbo 16v k-series 11.9@118.9 :)
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1346 Posts Member #: 2340 Post Whore Dublin Ireland |
25th Aug, 2008 at 11:26:46pm
Thanks lads We pulled the pistons and striped the head no signs of any det apart from the Gasket My taught is I may go for a Bi Metal gasket with FSR rings It looks like the motor is runing just fine we have had this on the rolling road at full load for over 1 min at 7000 rpm with no signs of det we are only runing 21 deg total advance and that is 5 deg back from full power which was reched at 26 deg when we droped the ignition back to 21 we lost a small amount of power but back to 21 and we where on the money at 130hp from this 1380. the only posable reason we have found for this failure is that the Bk450 seems to over hand the 73.5mm bore by a small amount has any else noticed this on the builds or had I an falty gasket,
On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers. ______________________________________________________ |
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
26th Aug, 2008 at 08:09:39am
On 25th Aug, 2008 PaulH said:
....the only posable reason we have found for this failure is that the Bk450 seems to over hand the 73.5mm bore by a small amount has any else noticed this on the builds or had I an falty gasket,... I'm building 1360 (73.0mm) and the BK450 is VERY close to the bores uncompressed and that is with offset bores that I specified the offset specifically to match the gasket. Photos here http://www.turbominis.co.uk/forums/index.php?p=vt&tid=234047 There will be manufacturing tolerances on these gaskets too. I expect mine will only just miss overlapping when it is compressed. Schrödinger's cat - so which one am I ??? |
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 1849 Posts Member #: 672 The oversills police Oslo, Norway |
26th Aug, 2008 at 08:18:26am
there are indeed manufacturing tolerances, I checked the distance between 2-3 on 4 or 5 of these (all new) and it varied with 0.8 mm! |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
26th Aug, 2008 at 10:39:54am
Use an AF460 instead On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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326 Posts Member #: 1323 Senior Member |
27th Aug, 2008 at 12:31:50am
On 25th Aug, 2008 PaulH said:
Thanks lads We pulled the pistons and striped the head no signs of any det apart from the Gasket My taught is I may go for a Bi Metal gasket with FSR rings It looks like the motor is runing just fine we have had this on the rolling road at full load for over 1 min at 7000 rpm with no signs of det we are only runing 21 deg total advance and that is 5 deg back from full power which was reched at 26 deg when we droped the ignition back to 21 we lost a small amount of power but back to 21 and we where on the money at 130hp from this 1380. the only posable reason we have found for this failure is that the Bk450 seems to over hand the 73.5mm bore by a small amount has any else noticed this on the builds or had I an falty gasket, thanks, Paul. Excuse my ignorance , what are FSR rings ? |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
27th Aug, 2008 at 10:57:51pm
Ferriday Sealing Rings
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
28th Aug, 2008 at 12:12:03am
detonation caused by..... too high a compression and too much advance mixture incorrect .............
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