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| Home > General Chat > 73.5mm Thick head gasket | |||||||
 1434 Posts Member #: 8466 Post Whore Mansfield |
2nd Mar, 2014 at 11:32:04pm
Anybody had any experience with Cometic style head gaskets to lower compression ratios. I'm hoping to lower my CR slightly to allow a little more boost. I'm currently using a AF460 gasket due to the the alloy head. I've noticed a 120thou gasket is available for 1275cc, but what about 1380cc. A 60thou compressed gasket would be perfect. Class C 3rd Place Avon 2011 14.18 @101mph |
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 5417 Posts Member #: 6181 Double hard bastard brookwood woking |
2nd Mar, 2014 at 11:51:31pm
I have one fitted but not run it yet mate. I have started posting on Instagram also my name on there is turbomk1golf
On 1st Nov, 2007 Ben H said:
There is no such thing as 'insignificant weight saving', it all adds up. |
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1434 Posts Member #: 8466 Post Whore Mansfield |
3rd Mar, 2014 at 07:32:56am
Is yours the 120thou version for 73.5mm?
Class C 3rd Place Avon 2011 14.18 @101mph |
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 1755 Posts Member #: 8852 Post Whore leicestershire |
3rd Mar, 2014 at 09:36:56am
I know cometic used to be good, I'd hazard a guess people stopped using them due to the price over a bk450 13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat! |
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Site Admin  9404 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
3rd Mar, 2014 at 01:21:15pm
why do you need to use an af460 on an alloy head? I'm using a bk450, with an alloy head and 28psi boost, no issues. Team www.sheepspeed.com Racing
On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials |
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1434 Posts Member #: 8466 Post Whore Mansfield |
3rd Mar, 2014 at 07:02:58pm
I was told by Specialist components to only use the AF460, due to the fire rings on the BK450. To be fair I did use the BK450 on my Webcon alloy head. Edited by alaskanow0 on 3rd Mar, 2014. Class C 3rd Place Avon 2011 14.18 @101mph |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
3rd Mar, 2014 at 07:12:22pm
the fire ring are a slightly larger diameter on the 460 so theres less chance of the piston clipping the gasket than with the 450. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 1767 Posts Member #: 9165 Previously josh4444 Australia, brisbane |
4th Mar, 2014 at 08:48:18am
what i dont understand is why the minis dont have dowels or something to locate the head and block...
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