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Old 08-30-2012, 10:17 AM   #1306
bk brkr baker
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While not nearly exotic as most of the posted motors, here is a cut-away R-1 Yamaha that was on display at the Indy Moto GP.
The intake tract looks pretty well optimized.
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Old 08-30-2012, 01:01 PM   #1307
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This:



is a spare engine for this:



The engine is apparently a Mini Cooper block with a BMW DOHC motorcycle head adapted to it. They ran 156 MPH (!!!) at Speed Week at Bonneville last week.

In-car video of the run here: http://www.youtube.com/watch?v=AMEkQFfQqns
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Old 08-30-2012, 02:59 PM   #1308
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ill throw my hat in here.....













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Old 08-30-2012, 03:44 PM   #1309
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A Chevy 409 with Webers and MORE Webers?
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Old 08-30-2012, 03:52 PM   #1310
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A Chevy 409 with Webers and MORE Webers?
its American engine philosophy.... more is good but WAY more is better

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Old 08-31-2012, 09:38 AM   #1311
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Best Carburetor known to MAN!!!

Awesome.

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Old 08-31-2012, 10:18 AM   #1312
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Best Carburetor known to MAN!!!

Awesome.

I'm really intrigued by the apparent set-up: 4 Webers "on-line" and 4 on "stand-by"? I guess he could un-cap the 4 on top to run at Bonneville or something?
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Old 08-31-2012, 10:45 AM   #1313
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I'm really intrigued by the apparent set-up: 4 Webers "on-line" and 4 on "stand-by"? I guess he could un-cap the 4 on top to run at Bonneville or something?
two sets of carbs likely for two different fuels depending on if he's getting to bonneville or running on bonneville?
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Old 08-31-2012, 10:48 AM   #1314
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Quote:
Originally Posted by Hughlysses View Post
I'm really intrigued by the apparent set-up: 4 Webers "on-line" and 4 on "stand-by"? I guess he could un-cap the 4 on top to run at Bonneville or something?
. there is only 4. and they are all fed?
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Old 08-31-2012, 01:26 PM   #1315
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. there is only 4. and they are all fed?
Au contraire; there are 8 as shown in this other photo from above:



There are 4 separate Webbers in a row with the barrels oriented vertically sitting on top of the manifold (with their inlets capped off) and four more mounted horizontally (2 on either side of the manifold). Very curious.
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Old 08-31-2012, 01:52 PM   #1316
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Quote:
Originally Posted by Hughlysses View Post
Au contraire; there are 8 as shown in this other photo from above:



There are 4 separate Webbers in a row with the barrels oriented vertically sitting on top of the manifold (with their inlets capped off) and four more mounted horizontally (2 on either side of the manifold). Very curious.
That's just nuts. When you consider the difficulties of getting 8 carbs synchronized and balanced and jetted properly, this isn't practical. Especially because there are 3 sets of linkages to deal with. A pair of Holley Dominators will flow more air than that contraption and will be no problem to set up.

If chrome stacks are wanted, a Hilborn setup that's been converted to electronic injection would work fine.
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Old 08-31-2012, 03:10 PM   #1317
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Quote:
Originally Posted by Hughlysses View Post
Au contraire; there are 8 as shown in this other photo from above:



There are 4 separate Webbers in a row with the barrels oriented vertically sitting on top of the manifold (with their inlets capped off) and four more mounted horizontally (2 on either side of the manifold). Very curious.
think of the second set as secondaries on a holley. there are four carbs. you wick it and the secondaries open.
it isn't fucking rocket science.
there are four webbers. end of story.
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Old 08-31-2012, 04:05 PM   #1318
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Quote:
Originally Posted by ttpete View Post
That's just nuts. When you consider the difficulties of getting 8 carbs synchronized and balanced and jetted properly, this isn't practical. Especially because there are 3 sets of linkages to deal with. A pair of Holley Dominators will flow more air than that contraption and will be no problem to set up.

If chrome stacks are wanted, a Hilborn setup that's been converted to electronic injection would work fine.

The builder is obviously a half a bubble off plumb. He started with a 409

Actually the whole car is really interesting. I like it.
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Old 08-31-2012, 04:43 PM   #1319
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Originally Posted by DJGypsy View Post
two sets of carbs likely for two different fuels depending on if he's getting to bonneville or running on bonneville?
Look again. There is a single fuel line from the mechanical fuel pump up the front of the engine, and under the carbs. Feeds the top carbs and at the front of the carbs it goes to a Tee fitting that then feeds the side carbs.
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Old 09-02-2012, 12:47 PM   #1320
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This is the companies website who built the manifold. Lots of interesting things to see.

http://www.piercemanifolds.com/
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