timucin

3969858....427T......68-84...4-bolt

this is tall deck;

what is the maximum bore we can take from this block?
what is the maximum stroke?

thnx for help;

timucin

i know this sounds stupid but sorry;

what is the standart bore on this block?
i am trying to understand how much will be .125 more

thnx

tripps

Std bore should be 4.250 !!! tripps

timucin

4,375 max bore
4,375 max stroke

right?

so 525 cu.in maimum i can get from this engine

am i correct?

paradigm shift

Bore maximum size really depends on how the block sonic tests. You can go 4.5" on stroke with a little work on clearance for the rods.

timucin

do i have to be very well experienced to do that? or simple work?
thnx

paradigm shift

You don't have to be an expert but you need to know what your doing or you can weaken or worse ruin a good block. The blockk has some clearance notches now you just need more room. If it is a 427 truck engine block it is not clearanced enough for even a 4.25 stroke. Actually 4.0 stroke may need some grinding. You just don't want to grind any more than you have to. Before blocks became more available and priced better the 427 tall block was a popular block. It does not have the strength that a Dart or Merlin or a GM Bowtie block has. I am sure there is a web site that has some how to tips better than I could explain. Maybe someone else knows or I will check and see what I can find.

Check this site. Good information in the tech section. Look at article #34 on blocks.

http://www.rehermorrison.com/

timucin

thnx too much

timucin

cool site, also scholl stuff may be i should go to course like that cause i am not planning to give -up hi-hp engines and there is noone around here to help me...

paradigm shift

There are other sites with information like this also but nothing like hands on knowledge. Course might even pay for itself in the long run. I think it would be fun, wish I had the time.