piston to bore clearance question
06-23-2011, 09:21 AM
#1
11 Second Truck Club
Thread Starter
iTrader: (2)
Join Date: Jan 2002
Location: Missouri
Posts: 1,412
Likes: 0
Received 0 Likes
on
0 Posts
piston to bore clearance question I am thinking about boring an iron 5.3 block to LS1 size and using stock used LS1 pistons. The factory spec for piston to bore on a LS1 is .0007-.00212 (which seems awful tight) Looking for opinions on where to set the clearance for a quiet, reliable, no oil using, 100,000 mile daily driver motor. If you split the range in half it comes up to .0014.....would that be a decent number to shoot for?
06-24-2011, 07:50 AM
#3
TECH Fanatic
iTrader: (8)
Join Date: Nov 2009
Location: phx the cactus patch
Posts: 1,095
Likes: 0
Received 13 Likes
on
13 Posts
I agree , go with as small a ptb as will allow pistons to slide up n down in the bores . The reason they have been able to decrease the space between pistons and bores is because of the increased amount of silicon in the pistons . At 16% , the pistons don't expand near as much as regular cast pistons that have only 8 or 9 % silicon .
