360 stroker, cylinder wall thickness
Hi!
I'm new to this forum, and start with a small block engine question.
I'm building a 4" stroke LA 360 (408).
Unfortunately, the -71 360 block I managed to find here in Sweden was quite rusty.
It had to be bored to 4.060" to clear up.
I have read all about the early 360 having extra thick cylinder walls, but also that it all might be a myth.
The general advise people always get is to have the block sonic tested regardless of what year the casting is.
So... I did that, and got the numbers, but what is really considered safe?
See the attached picture ( I hope it's possible to read)
Minimum major thrust wall thickness is 0.165"
What do you experts say? Good or bad for a 408 stroker (actually 413) with aftermarket heads, about 10:1 compression, flat tappet cam, RPM dual plane intake... I aim for close to 500 hp.
/Magnus
Hi!
I'm new to this forum, and start with a small block engine question.
I'm building a 4" stroke LA 360 (408).
Unfortunately, the -71 360 block I managed to find here in Sweden was quite rusty.
It had to be bored to 4.060" to clear up.
I have read all about the early 360 having extra thick cylinder walls, but also that it all might be a myth.
The general advise people always get is to have the block sonic tested regardless of what year the casting is.
So... I did that, and got the numbers, but what is really considered safe?
See the attached picture ( I hope it's possible to read)
Minimum major thrust wall thickness is 0.165"
What do you experts say? Good or bad for a 408 stroker (actually 413) with aftermarket heads, about 10:1 compression, flat tappet cam, RPM dual plane intake... I aim for close to 500 hp.
/Magnus
