Finding piston to deck height?
Thread Starter
Joined: Jun 2014
Posts: 1,241
Likes: 47
From: Noblesville, IN
Finding piston to deck height? Hello,
I'm planning a new build with some AFR heads and Wiseco pistons, and I was trying to calculate my CR at various head cc's so I could figure out how much I'd want to mill.
However one important part is obviously the piston to deck height.
Is there any way to calculate this without already having the short block assembled?
I'm planning a new build with some AFR heads and Wiseco pistons, and I was trying to calculate my CR at various head cc's so I could figure out how much I'd want to mill.
However one important part is obviously the piston to deck height.
Is there any way to calculate this without already having the short block assembled?
Can't really calculate it as there are many variations especially in a used block.
You can either wait until the shortblock is together and go from there. Or if you want a specific number then tell the machine shop doing the work to set yours up at that value by either milling the piston crown or the deck accordingly.
You can either wait until the shortblock is together and go from there. Or if you want a specific number then tell the machine shop doing the work to set yours up at that value by either milling the piston crown or the deck accordingly.
Teching In
Joined: Jun 2015
Posts: 8
Likes: 0
Hello,
Yep, there's a way. I've done it using the compression calculator pro/engine toolbox app in my phone or ipad. It has a deck height calculator. According to the engine data (it includes the data for the most popular ones) it allows you to find the distance from the block deck to the rod's small-end center.
Then subtract the piston's compression deck height from the included data sheet. Voilá! deck-height. Then using the compression calculator you can experiment with as many combinations you want by varying gasket compressed thickness, chamber cc's, etc.
I've found it accurate enough, however your best bet is mock the crank and rod in the block and take your measurements. As someone posted in this thread, there are variances depending on the block's past mainly.
At least the app will help you decide on the parts to use and the approximate amount of machining dollars you'll have to spend.
Cheers!
Yep, there's a way. I've done it using the compression calculator pro/engine toolbox app in my phone or ipad. It has a deck height calculator. According to the engine data (it includes the data for the most popular ones) it allows you to find the distance from the block deck to the rod's small-end center.
Then subtract the piston's compression deck height from the included data sheet. Voilá! deck-height. Then using the compression calculator you can experiment with as many combinations you want by varying gasket compressed thickness, chamber cc's, etc.
I've found it accurate enough, however your best bet is mock the crank and rod in the block and take your measurements. As someone posted in this thread, there are variances depending on the block's past mainly.
At least the app will help you decide on the parts to use and the approximate amount of machining dollars you'll have to spend.
Cheers!
Can anyone explain what '0 deck' and 'standard deck height' mean?
Standard deck height means the deck of the block has not been touched and is at it came from the factory.
