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| SteveNMaine |
 Dec 2 2024, 08:17 AM
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#1
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Newbie  Group: Members Posts: 7 Joined: 12-August 24 From: Maine Member No.: 28,288 Region Association: None  |
I am trying to work out compression ratio of my 2056 build. In calculating head volume my understanding from the forum is that stock 2.0 heads have 57mm and the valve pockets on the pistons I am going to use is 3mm. Do I add these together to use 60mm in my calculations for head volume?
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| technicalninja |
Dec 3 2024, 05:42 PM
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#2
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Advanced Member Group: Members Posts: 2,030 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
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@porschetub The .028 on the top of the piston is negative deck height, correct?
Did you use a fire ring? If so, how thick? If not, .028 is 4 thousands CLOSER than anything I've ever run across or built. I have built a tight bore, cast piston water pumper at .033-.034. It worked fine but I was nervous about lack of clearance. .028 sets a new "low" for me... @emerygt350 OMG are you right! You take off too much on a water pumper there are only two ways to save it. Thicker head gasket (if someone makes it!!!) Replace block (and do ALL of the block machine work again!!!). I do my WP builds WITHOUT decking the block. Get everything perfect before pulling it back down for the decking. I also let the machine shop know that if they take more than I ask for they will get to purchase and machine another block for me! I'll also pay DOUBLE for the extra precision! |
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Posts in this topic
SteveNMaine 2056 Build Dec 2 2024, 08:17 AM
Geezer914 Yes, anything that adds volume. Dec 2 2024, 09:25 AM technicalninja You should measure the valve depressions, head CCs... Dec 2 2024, 09:50 AM rfinegan IM doing this too..
This may help
https://www.yout... Dec 2 2024, 12:31 PM technicalninja Another tip is to reduce the surface tension of th... Dec 2 2024, 12:56 PM barefoot My understanding is that 2L heads are 60 cc and 1,... Dec 2 2024, 06:40 PM Jack Standz
I am trying to work out compression ratio of my 2... Dec 2 2024, 10:41 PM emerygt350 I used my kids crayon clay and compared it to oil,... Dec 3 2024, 06:25 AM 930cabman
I am trying to work out compression ratio of my 2... Dec 3 2024, 10:59 AM technicalninja
[quote name='SteveNMaine' post='3179889' date='De... Dec 3 2024, 12:16 PM porschetub Did all that when I did my last build for a custom... Dec 3 2024, 04:15 PM emerygt350 Well spent time. And on a type 4 it's some pre... Dec 3 2024, 04:55 PM Jack Standz
[quote name='SteveNMaine' post='3179889' date='D... Dec 4 2024, 02:17 PM
technicalninja Jack, I am the TECHNICALninja...
I earned that na... Dec 4 2024, 04:27 PM |
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