Foggy Torquay 15th April ,Silverline !

[Captain Chaos]

ok, whats the next question?

for that prize i'm in!

[Jon Fuller]

Johnny blufin, your photo collection is more than a little worrying.

[BigBird1964]

Originally Posted by Captain Chaos

ok, whats the next question?

for that prize i'm in!

It would be too big for you, I'll get you one in a smaller size.

[timtap]

[SIZE="4"]Stiil Testing today, 100 mph run at midday with lots more tweaking to do !!!

[Matt]

Interestling, going max overbore on a bulldog makes it a 572 - well, interesting to me, anyway.

Originally Posted by Jon Fuller

They're 572ci (9.3 litre), 750hp

[Jon Fuller]

4.5 x 4.5 innit

[Matt]

Bullie is 4.375 stroke

[Jon Fuller]

oh, 4 3/8". so is it 4-3/8 x 4-1/4 (4.375 x 4.25)?

I think a 454 is 4.25" bore, and the 502 is 4.47" (from memory)

[Matt]

Errrr, no, not unless it's a 496.

Originally Posted by Jon Fuller

oh, 4 3/8". so is it 4-3/8 x 4-1/4 (4.375 x 4.25)?

[Jon Fuller]

Originally Posted by Matt

Errrr, no, not unless it's a 496.

What is the bore & stroke of the 540?

[Matt]

4.375 S x 4.44 B
And max overbore is 4.56"

[Jon Fuller]

Just found this: http://www.roadsters.com/bbc/#bore

which says a 572 is indeed 4.5 x 4.5

Looks like my 482EFI is 4.25 x 4.25

And a 454 is 4.25 bore. (by 4" stroke)

I was close, the stock 502 is 4.468, not 4.470. but what's 2 thou between friends.

[Matt]

I aint arguing with that. What I am saying is max overbore on a bulldog=572.

Look 2 down and 1 to the left on yer chart.

[Matt]

And GM's ZZ572 is also 4.375x4.56:

http://www.gmperformanceparts.com/En...8827&engCat=bb

[Matt]

I feel I should add I have no intention of reboring it though unless absolutely necessary. It's good to know there's a fair bit of spare meat in the cyls though.

[Jon Fuller]

What was the 496 comment about then? I'm confused now.

[Jon Fuller]

Originally Posted by Matt

Look 2 down and 1 to the left on yer chart.

tis a large webpage, with loads of complex charts, you'll need to be more precise.

You any good at navigating?

from what I can make out, a 496 is 4.00 x 4.440

[Matt]

4.375 x 4.25 gives you a 496

Originally Posted by Jon Fuller

What was the 496 comment about then?

[Matt]

2 down and 1 to the left of the 572 you were looking at gives you another 572, which is what the bulldog "could" overbore too, and is the spec of the GM 572
I'm great at navigating, you any good at following instructions?

Originally Posted by Jon Fuller

tis a large webpage, with loads of complex charts, you'll need to be more precise.

You any good at navigating?

from what I can make out, a 496 is 4.00 x 4.440

[Jon Fuller]

Originally Posted by Matt

I'm great at navigating, you any good at following instructions?

No.

have you answered yet, what is the B & S of the bulldog? (not a educated guess, the actual spec, as a GM 496 is not 4.375 S, it's 4.00)

And, is the 4.56 the limit on the GM wall thickness? I'm assuming the Bulldog tall deck motor is the GM bow-tie jobbie, mebbe it could go more. the 4.625 bore gives a piddly 588ci!