[s-cars] Re: Pines

[QSHIPQ at aol.com]

James:
You watch the footage of Service working over an Audisport car, you can easily understand the clocking logic.  In the middle of the night in the outback of South Africa, changing a turbo could be done by braile, and I dare say, even by a wrench challenged individual (Rally thing... codrivers point to drivers now;).

Not too worry I have been watching your progress on your site James, you have some cool toys!  Espcecially watching where that red hose on the second wastegate is going to go, then where you will dump the other side.

Specific to your car, I will say that I have big concerns over what appears to be less than 1/2 in clearance between turbo and frame rail.  The problem I have with this is two fold.  First, I don't care if you weld the engine to a bridge beam, it's gonna flex over.  Second, IF you get failure on a motor mount (BTDT, solid mounts either work or fail, usually this is a respective order thing), you will most likely do bad things to the right side of the motor. 

That's a whole lot of turbo sir.  Driving it at 2.1 liters will be a challenge for you (understatement inserted)

Cheers!

SJ 


In a message dated 10/20/2004 9:28:28 AM Eastern Daylight Time, James Bufkin <jbufkin at austin.rr.com> writes:

>Things to note:  This is a Lehmann manifold.  The top of the 930 wastegate 
>is about 1/2" from the bottom of the hood.  The wastegate is perfectly 
>plumb.  The Turbo flange is perfectly plumb so the turbo aligns to the axis 
>of the car.  The #3 cylinder, Wastegate and hotside housing align.  This 
>makes the downpipe flanges perpendicular to the axis of the car.  I think 
>this is typical german symmetry and thinking.  This setup provides alot of 
>room for the downpipe which has to snake above the subframe and below the 
>steering rod to clear the skidplate.   It also provides alot of ventilation 
>to remove hot air from the aft of the downpipe.  This will be extremely 
>useful for long stints.  I've seen video of S1s taking jumps at dusk with a 
>bright red glow coming from the enginebay and illuminating the ground under 
>the car.  The turbo is glowing so hot it looks like a red light in the 
>engine.
>
>This also means an S1 style airbox affixed to the front of the turbo is 
>ideal for airflow.   To use this manifold, the engine has to have solid 
>motor mounts cause the clearances are too close for hydraulic mounts.  Also 
>the fender has to be removed.  The turbo comes in and out through the front 
>headlight opening.
>
>James "Running a 2.144L motor and lovin it" Bufkin :-)
>
>
>James E. Bufkin, P.E.
>Bufkin Design and Engineering, inc.
>2309 West 8th Street
>Austin, Texas 78703
>512-236-8070
>fax 512-480-5927 
>
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