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Old 10-26-2012, 10:48 PM   #16 (permalink)
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Quote:
Originally Posted by nw_guy4_fun View Post
Dewey used to use them on the all bore 107" when Grock was involved and it worked well but that said today I would pass. Difficult to integrate with the Delphi plus the TB is too small, our motors grew up and an IR setup needs a much more throttle area to equal the airflow of a shared runner setup. IME I found on the motors I built they needed 1:1 or higher TB size in mm per cu/in. I used up to 1.6 but that was a 8000 rpm motor (2 liter Ford SOHC Dual Weber 48DCOE)

Those guys at Star Racing did two front heads for a reason, real estate plus the ability to package better and not interfere with the rider in a street situation. Plus this configuration gives the ability to wave pulse tune by changing manifold lengths. What I don't understand why they didn't go rearward, air likes a straight path ya know, similar to the XR750 configuration.
Halloo. And I wonder if anybody makes a head in a similar configuration for the EVO/TC. Run exhaust out the port-side of the motor. Still, looks stout, even though it still runs up so high, torque looks to be around 70 at about 3 to 3 and a half...wonder what the vibration is like in that region?

C.......
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Old 11-21-2012, 08:11 PM   #17 (permalink)
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cool

That's a serious build by George and his gang, ..

there's a test run video on youtube I think, ..

Curtis
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Old 11-21-2012, 08:46 PM   #18 (permalink)
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Quote:
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That's a serious build by George and his gang, ..

there's a test run video on youtube I think, ..

Curtis
The CBoggs, on vtwinforum? Welcome!!!!!!
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Old 11-22-2012, 03:56 AM   #19 (permalink)
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Welcome Curtis!!
Maybe share some insight into our V-Twin world.
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Old 11-23-2012, 08:22 PM   #20 (permalink)
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claydbal is reading this now saying WTF is this?
Ya would have to run a ecm even carbed to map timing. Anyone know about what they used?
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Old 11-23-2012, 09:18 PM   #21 (permalink)
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I was told that the s&s efi unit handles IR setups quite well, but have no first hand knowledge. The Star team might part with that information though. good to see you back.
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Old 11-24-2012, 09:47 AM   #22 (permalink)
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Seeing how the rear head has a reversed push rod configuration I wounder how they set
up the rear push rods to open the correct valve. It would seem that just crossing the push rods would create side loading on the lifter and throw the geometry completely off. It would seem the best way (and most expensive) would be to just have a cam made for the rear (front) head. Wonder how they did it?
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Old 11-24-2012, 11:10 AM   #23 (permalink)
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A custom cam with moved lobes? Swapped the positions on the cam?
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Old 11-24-2012, 11:12 AM   #24 (permalink)
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For those that don't already know, Mr. Curtis Boggs, is a legend in the high performance industry. His accolades are great and numbered. He has been instrumental in the success of many programs and continues to do so. The man, simply put, has forgotten more than most will ever know.
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