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The 100-Six Forum

healy bn4 piston count

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bob mabeck Robert Manbeck
Parkerford, PA, USA   USA
Which piston is #1...FRONT OR REAR?

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Craig Clifton Avatar
Martinez, CA, USA   USA
Front.

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
In reply to # 205005 by bob mabeck Which piston is #1...FRONT OR REAR?

Dido.....Front

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Attachments:
'57 Domed Race Pistons.jpg    44.1 KB
'57 Domed Race Pistons.jpg

petnatcar Avatar
petnatcar Silver Member Peter Carbone
Watertown, NY, USA   USA
Those look beautiful Robert.
What's the compression?

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
In reply to # 205047 by petnatcar Those look beautiful Robert.
What's the compression?

12.5:1 and 1.65:1 rocker ratio and .573 lift.


Attachments:
'57 Saenz Race Rods & Pistons.jpg    49.5 KB
'57 Saenz Race Rods & Pistons.jpg

Roller Rockers - Beehive Springs.jpg    64.1 KB
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petnatcar Avatar
petnatcar Silver Member Peter Carbone
Watertown, NY, USA   USA
What are you burning for fuel?

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
Randy Forbes Avatar
Parrish, FL, USA   USA
1957 Austin-Healey 100-Six
1999 BMW M Coupe "Blue Car"
1999 BMW M Roadster "Black Car"
2001 BMW M Roadster "Gray Car"
Dougie, what do you think you'll get for hp__ballpark?

This of course, assumes matched combustion chambers, cleaned up (but not hogged out) ports, balanced rotating/reciprocating assembly, every other detail to specs (aka, blueprinted, an often misused term winking smiley ) and your 3 x 2" SUs & headers.

Just curious.



Edited 1 time(s). Last edit at 2018-09-09 04:42 PM by Randy Forbes.

Dougie Avatar
Dougie Doug Escriva
Portland, OR, USA   USA
Hi Randy -

This motor was built with a linear power band in mind producing approximaytely 260 hp and torque at 5800-6000 rpm. The cam was designed specifically for the 2" SU HD8's as I didn't want a "Weber" cam which has a much different flow capacity. As referenced, everthing balance head-to-toe. We had a test-n-tune trackday on Friday and I improved lap times with every outing. This was at my home track (PIR) Portland, OR and I know it pretty well, T #7 is a sweeping right-hander that closes up fast at the apex and is tough in a heavy car. I take it in 3rd and let the big six's torque carry me though. With this new motor, just as I past the apex and rotated the car towards the exit, I mashed the pedal. Looking in the rear view mirror, I could see 2 black tire strips as the wheels broke loose and the quaife limited split did it's job for 15 yards unitl I hit 4th gear down the back straight. This was a much different anything we've had in the past. In addition to the power output, we've designed this motor with longevity in mind, incorporating a "side oiling" system that feeds the main oil gallery and the vitals first with oil from the cooler.

Sorry for Hijacking the thread.....



Edited 2 time(s). Last edit at 2018-09-09 09:14 PM by Dougie.


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front oil entry.jpg    31.6 KB
front oil entry.jpg

side oil entry.jpg    33.4 KB
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side oiling (1).jpg    37.6 KB
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Randy Forbes Avatar
Parrish, FL, USA   USA
1957 Austin-Healey 100-Six
1999 BMW M Coupe "Blue Car"
1999 BMW M Roadster "Black Car"
2001 BMW M Roadster "Gray Car"
Nice, I would be striving for longevity too!

What an interesting concept with the "side oiler" (borrowing Ford's terminology) so the return from the oil cooler feeds into the "branch" of the "T" theoretically giving an even split?

Good job Dougie! Glad you're enjoying the results too!

/hijack

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