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 1425 Posts Member #: 9199 Post Whore Lancashire |
13th Oct, 2013 at 11:16:18am
Getting to the point of having block bored to +20 but whats the best way to tell the engineering shop how much to take off the deck to give correct CR.
What the mind can conceive the mini can achieve
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 4629 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
13th Oct, 2013 at 11:43:16am
You need to do a dry build & measure the height of the piston in relation to the block face at TDC. Then you know how much to remove to leave you with 0.020"
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1425 Posts Member #: 9199 Post Whore Lancashire |
13th Oct, 2013 at 01:14:47pm
cheer phil, thought i'd ask before getting any work done.
On 13th Oct, 2013 Turbo Phil said:
You need to do a dry build & measure the height of the piston in relation to the block face at TDC. Then you know how much to remove to leave you with 0.020" Phil. What the mind can conceive the mini can achieve
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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
13th Oct, 2013 at 01:26:16pm
0.5mm deck hight I used on my last build Yes i moved to the darkside |
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1425 Posts Member #: 9199 Post Whore Lancashire |
13th Oct, 2013 at 08:19:40pm
that equates to 2cc, which i used to do my CR calculation for 8.6:1
On 13th Oct, 2013 Brett said:
0.5mm deck hight I used on my last build What the mind can conceive the mini can achieve
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
14th Oct, 2013 at 06:12:28pm
If you are using omega cast pistons +20s 10cc dish I would flash the block 0.020" leaving 0.020" deck height, .......... as those pistons sit 0.040" down the bore on @ 81.3mm stroke crank
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1425 Posts Member #: 9199 Post Whore Lancashire |
14th Oct, 2013 at 08:26:52pm
pistons arrived today, need to get the block done next month so can hopefully get the build started.
On 14th Oct, 2013 BENROSS said:
If you are using omega cast pistons +20s 10cc dish I would flash the block 0.020" leaving 0.020" deck height, .......... as those pistons sit 0.040" down the bore on @ 81.3mm stroke crank What the mind can conceive the mini can achieve
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4629 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
14th Oct, 2013 at 09:06:42pm
I wouldn't assume anything though. Do a dry build, measure & make sure.
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1425 Posts Member #: 9199 Post Whore Lancashire |
15th Oct, 2013 at 06:49:24am
"its better looking at it than for it"
On 14th Oct, 2013 Turbo Phil said:
I wouldn't assume anything though. Do a dry build, measure & make sure. Remember the old saying, "measure twice, cut once" Phil. What the mind can conceive the mini can achieve
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| Home > Technical Chat > Deck Height | |||||||
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need to decide where to get block bored now as well as crank ground.
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