Bronze Lifter Bores
#2
Junior Member
APPRENTICE
Join Date: Mar 2003
Posts: 24
Bronze lifter bores....
Hello, Bronze lifter bores are always a good idea in an "all-out" racing engine. The benefits include: truing the lifter bores to proper alignment and angle, reduced friction, the option of larger O.D. lifters and repairability of the lifter bore in the event of lifter failure. This can be performed by most reputable machine shops but it can be expensive. This is a smart procedure if you want to protect the investment of the cylinder block/engine but it is not absolutely necessary. Most racing engine companys do this now to protect the buyers investment anyway, because of increased horsepower and limitations on valvetrain it is more cost effective to spend the added time to install the bushings at the time the engine is assembled from new.
#3
Senior Member
MASTER BUILDER
Join Date: Jan 2008
Posts: 146
i think its also a machining work to fix a older wore motor that you want to keep, you can also sleeve a block thats is past the limitsof regular use to "save" a old friend"-lol but it is costly , great for vintage engines
#4
Senior Member
EXPERT BUILDER
Join Date: Nov 2003
Location: NORTHEAST
Posts: 290
Re: Bronze Lifter Bores
Originally Posted by FAT622
When do you have to use bronze lifter bores? i have a merlin 111 10.2 deck BBC with dart big m heads. the cam has 833 thou lift and 900lb open
We have 2 SBC with 871's on them and aluminum blocks with .904 lifters and no bushings and we run 1250 over the nose and 460at the seat and no wear issues using the aluminum lifter bores.