# Some fab on my evo

**URL:** <https://forums.speedlife.net/t/some-fab-on-my-evo/237233>\
**Category:** Shift518 Automotive\
**Created:** [June 7, 2008, 8:30pm UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233 "2008-06-07T20:30:57Z")\
**Posts on this page:** 8\
**Page:** 2

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**Author:** ![bennyfizzle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bennyfizzle/32/6291_2.png) [@bennyfizzle](https://forums.speedlife.net/u/bennyfizzle)\
**Post date:** [June 9, 2008, 10:19am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/21 "2008-06-09T10:19:06Z")

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> [@Mk4 30R](#):
>
> blueprinting an engine is just that, you follow the exact blueprint the factory has for the engine. you follow the factory spec for ring gaps, bearing tolerances etc.
> 
> my engine in my car is stock bore spec, but the c/r is lower and the 1st and 2nd rings(compression rings) areon the big end of the tolerances by a few thousandths of an inch, but still within the allowed tolerances

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

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**Author:** ![imported\_Jesse](https://avatars.discourse-cdn.com/v4/letter/i/e9bcb4/32.png) [@imported\_Jesse](https://forums.speedlife.net/u/imported_Jesse)\
**Post date:** [June 9, 2008, 10:51am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/22 "2008-06-09T10:51:45Z")

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my car has 100k on it and runs 30psi everyday, its getting tired :tong

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**Author:** ![votblindub](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/votblindub/32/6280_2.png) [@votblindub](https://forums.speedlife.net/u/votblindub)\
**Post date:** [June 9, 2008, 10:52am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/23 "2008-06-09T10:52:24Z")

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> [@BENNYFIZZLE](#):
>
> 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

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?

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**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\
**Post date:** [June 9, 2008, 10:54am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/24 "2008-06-09T10:54:28Z")

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> [@Jesse](#):
>
> my car has 100k on it and runs 30psi everyday, its getting tired :tong

time for a built 2 liter.

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**Author:** ![Mk4\_30R\_Ban](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mk4_30r_ban/32/6347_2.png) [@Mk4\_30R\_Ban](https://forums.speedlife.net/u/Mk4_30R_Ban)\
**Post date:** [June 9, 2008, 10:55am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/25 "2008-06-09T10:55:42Z")

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> [@BENNYFIZZLE](#):
>
> 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

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.

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**Author:** ![votblindub](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/votblindub/32/6280_2.png) [@votblindub](https://forums.speedlife.net/u/votblindub)\
**Post date:** [June 9, 2008, 11:00am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/26 "2008-06-09T11:00:33Z")

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> [@Mk4 30R](#):
>
> 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?

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**Author:** ![bennyfizzle](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bennyfizzle/32/6291_2.png) [@bennyfizzle](https://forums.speedlife.net/u/bennyfizzle)\
**Post date:** [June 9, 2008, 11:29am UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/27 "2008-06-09T11:29:22Z")

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> [@Mk4 30R](#):
>
> 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.

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?

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**Author:** ![imported\_hybrdthry91](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_hybrdthry91/32/6315_2.png) [@imported\_hybrdthry91](https://forums.speedlife.net/u/imported_hybrdthry91)\
**Post date:** [June 9, 2008, 7:48pm UTC](https://forums.speedlife.net/t/some-fab-on-my-evo/237233/28 "2008-06-09T19:48:23Z")

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> [@Mk4 30R](#):
>
> 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.

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.

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