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4.0 piston bowl size
Posted: Mon Feb 05, 2007 11:49 am
by ihatesissycars
Hi all,
Any ideas on how to measure the bowl size on some 4.0 pistons?
I need to find out what c/r they are.
Can i simply measure the depth of them and compare to another set to get a rough idea?
Posted: Mon Feb 05, 2007 12:04 pm
by russell_ram
4.0 are 23cc, 4.6 are 32cc.
They look 'similar', but obviuosly the 4.6 ones are deeper. I have both at home, I'll measure bowl depth later if I remember.
Russ
Posted: Mon Feb 05, 2007 12:15 pm
by ihatesissycars
Thanks russel i'd really appreciate it if you could!
Posted: Mon Feb 05, 2007 7:14 pm
by russell_ram
4.6 piston bowl is 5.80mm deep.
4.0 bowl depth is 3.35mm.
Difference is obvious when they are side by side. Straight edge and a steel rule will be accurate enough to tell them apart.
Sorry, I should have said that they are both the measurements for high comp (9.35) pistons.
Russ
Posted: Tue Feb 06, 2007 8:14 pm
by ihatesissycars
Cheers for the help Russell, i need to check whether the 4.0 pistons i have are high or low comp, I think to be honest i may be buying some new ones as a couple of the bores in my new block do have a wee bit a of wear so it's make sense to rebore it i suppose.