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Old 11-15-2006, 09:27 PM   #1
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Default Engine Blueprinting?

Hey there everyone?
Anyone hear of "engine blueprinting"? From what I understand, your engine is stripped down completely and, every part of the engine is balanced and tuned to operate in it'* most efficient manner.
If this is true, I was wondering if anyone knows an aprx. $$$ and if there'* a shop in the GTA (Greater Toronto Area) that can do it.
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Old 11-15-2006, 10:19 PM   #2
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Its not worth the money. These bottom ends can handle more than what 95% of the world can throw at them..

L67 bottom is proven into the 9s
L36 is proven into the 11s

-Jeremiah
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Old 11-15-2006, 11:25 PM   #3
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Not trying to be an azz but:
Quote:
Originally Posted by
L36 is proven into the 10s
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Old 11-16-2006, 12:00 AM   #4
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I was being on the conservative side
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Old 11-16-2006, 03:02 AM   #5
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Blueprinting is checking all tolerances.... You can do it yourself.

Balancing is balancing...

Neither are worth the money on a V6.
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Old 11-16-2006, 05:02 AM   #6
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the SI and SII 3800 CAN be improved upon just like the GN 3.8 (and the 4.1) is in high performance builds....especially when in search of reliability

this may be of some interest:
http://www.3800pro.com/forum/showthread.php?t=9384
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Old 11-16-2006, 10:33 AM   #7
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All you're doing is getting all of your parts the exact same weight. You get yourself a sensitive digital scale and you start by weighing all your connecting rods. Then you make all of the rods the same weight as the lightest one; by removing a tiny bit of material from each of the heavier rods a little at a time. Then when you get them all the exact same weight, you go and do the same for all the pistons. Then you balance the crank and flywheel to the nat'* A$$ too. After all that, you've got yourself a "balanced rotating assembley."
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Old 11-16-2006, 12:35 PM   #8
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I think that when you weigh and remove material from the rods you are sopose to figure out which end to remove material from.
I can't remember where but I saw an article where people were supporting rods on one end and weighing the other, both with the crank and piston end.
So you basically weigh each rod three different ways (no including checking it after you grind it).
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Old 11-16-2006, 01:35 PM   #9
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Blue printing is building the engine to exact design (blue print) specs, as close to +/- 0.0 tolerance as you can afford. This can be very expensive. How many pistons do you need to measure before you find 6 that are Y.YY inches? Next part, repeat.

Most "blue printed" engines are not truly blue printed; they are built so each piston is the same as the others etc...

Balancing is just what it sounds like. Crank, flexplate, harmonic damper as an assembly has the rotational axis and center of gravity matched. (0.5gram or less is what most shops shoot for.)

Connecting rods are weight matched as a whole and end to end. The end to end is the most important one; it gives them the same rotational center.

Pistons are weight matched with pins and rings.

Then heavy piston is matched to light rod etc...

Most factory engines are balanced adequately for ~6000 - 7000 rpm.
Balancing will make the engine feel smoother but is not needed unless you are going to spin it over 7000 rpm.

Blue printing will also make the engine feel smoother because each cylinder is producing the same amount of power.

Blue printing is generally not worth the expense until you reach the level where <0.001 second makes a difference in your pay check.
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Old 11-16-2006, 03:37 PM   #10
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Quote:
Originally Posted by Turbocharged400sbc
the SI and SII 3800 CAN be improved upon just like the GN 3.8 (and the 4.1) is in high performance builds....especially when in search of reliability

this may be of some interest:
http://www.3800pro.com/forum/showthread.php?t=9384
That'* some interesting and good info on the performance (or lack thereof) of the oil pumps in our engines.
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