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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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| porschetub |
Dec 3 2024, 04:15 PM
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#2
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Advanced Member Group: Members Posts: 4,742 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
Did all that when I did my last build for a customer,was using NOS raised dome high compression pistons and barrels from a 411 FI ,had some research to do and a respected builder on the Samba helped there and tested for volume over and over and got 8.8 to 1 which was suitable for this motor ,had to play with base shims to achieve this however .
On my engine stand this turned out to be a strong motor and buyer happy,its a lot of time but differance between a strong motor and average one.  |
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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 emerygt350 Well spent time. And on a type 4 it's some pre... Dec 3 2024, 04:55 PM technicalninja @porschetub The .028 on the top of the piston is... Dec 3 2024, 05:42 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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