Yes. Stock block height
A12/A12A Deck Height: 189.1mm
A14/A15 Deck Height: A12 height 204.1mm

Just make sure the block you use you measure the height to make sure somebody has not already decked it as that could throw the maths out on what you need.

That is why I will go for 0.3mm above deck :) And stock gasket.
What is the stock A14 gasket bore?

Can also install a block guard after decking the block so much but this is to expensive :(

Quote:Definitely not. For best power, the piston-to-head clearance (Quench) should be less than .030 inch, which means using an extra-thin gasket (like the GX gasket).

Another option of offset grind on the crank that can get me 0.5mm?
But that ads to cost and ruins crank regrind space :(

"Some racers use an 70mm A12 crank in an A14 block, with 133mm (stock) A14 rods and stock piston pin height race piston. They would then deck the A14 block down to make the pistons at deck height."

Well that means it has been decked 3.5mm from stock deck height :)

I can go with 3.2mm and then have the piston +0.3mm above the deck and a chamfer on the piston crown.
Does the piston stand proud of the deck in stock A14?
This is for budget A14 race engine. Stock lightened polished rods.
I rather drop deck height to get higher CR than skim the head and then have to make deep valve relieves :(

Thanks for the input so far guys :)

A15 crank all the way! pjz can set you up with one

On race engines in the USA, I have seen racers deck several mm off of the A14 block. 3 to 3.5mm. I would not recommend it unless it is your only option.

Some racers use an 70mm A12 crank in an A14 block, with 133mm (stock) A14 rods and stock piston pin height race piston. They would then deck the A14 block down to make the pistons at deck height.

Other racers would instead use 136mm rods (or longer rods with shorter custom pistons) and not deck the block. I used the 137-138mm rods with shorter pistons, leaving the block height near stock (just decked to clean it up).

If you deck the block several mm you have to shorten the head bolts, and you have to deepen the dowel locators to locate the head. Again, I would not recommend it unless you have no better option.

Peter

29 mm pistons are not very good for an A14 engine, because you would have to use custom rods.

On the other hand, with the custom rods, the rod/stroke ratio improves and it will be add 1/3 of 1 HP, so definitely worth spending a few hundreds of dollars.

Thanks. But why do you say 29mm pistons are not good for an A14?
1.73 rod stroke ratio is good for 29mm piston.