I thought blueprinting was the opposite for some reason, meaning I thought that you open up tolerances when ‘blueprinting’ :rofl
Makes more sense your way though, for sure. :rofl
my car has 100k on it and runs 30psi everyday, its getting tired :tong
yea, now im confused. cuz u told me it was loosening tolerances, the other day. so, blow by is caused by oil escaping around the cylinders?
time for a built 2 liter.
a blueprint is a design you follow correct, like when building a house. if you were building your engine and you “blueprint” the engine, you would be following a preset design.
do basically, rebuilding the motor with aftermarket bits following OEM specs?
right but then why do they always say ‘oh i had this motor balanced and blueprinted’
wouldnt they HAVE to ‘blueprint’ it if it was being rebuilt with all new bearings and the like, otherwise it’d fuck shit up amirite?
thats sorta the idea.
blueprinting means you use exact number there is no wide range of tolerance. where a service manual normally gives you a range of clearances you only use one size clearance when blueprinting a motor. it can be tight, it can be loose, but it must be consistant across the entire motor no deviating. its to your own spec depending on the motor being built and its purpose, what materials etc. blueprinting may not be practical for every motor because of the time it takes which means money to the customer, but it is definitely not meant for only short lived motors. just because you are blueprinting a motor it doesn’t mean you must use the tightest of clearances, but instead the tightest of tolerances to the specs you have outlined for the build.
an example of a blueprinted motor is a factory b series Honda engine. they use, i believe, 7 different sized bearings to get an exact clearance across the board on each journal rather than using one or two sizes and having them be “close” to each other. my block was blueprinted by laskey racing 3 years ago, and its still running strong, 3 turbo setups, 6k miles later(not much considering there are people out there with over 50k on their shortblocks). linghenfelter blueprints their motors, just a couple examples of top engine builders in the industry, domestic and import.
leakdown of 10-15% is normal? i would be pulling my motor apart if i saw these numbers. swift you better watch out with your <1% leakdown, your motor is doomed.<—by far one of the most abused motors in the area taking it like a champ still showing less than 1 percent across the board. also note the motor wasn’t build tight by any means as this is a forced induction street car. ah nevermind that motor was doomed once swift got his hands on it anyway lol.
oh and Brett call me at the shop tomorrow, might have a offer you can’t refuse on something if you’re still willing.