is it an Aero-head?

ozmoses · 11-14-2012, 07:36 AM

http://msn.foxsports.com/other/story...us-team-111412

Rob Farmer · 11-14-2012, 09:23 AM

Now this is an aero head

bpeckm · 11-14-2012, 10:26 AM

Always fascinated that the power take-off (gearbox) is at the nose end of the engine that we all know so well..... but there are a lot of ultralights out there powered by R100 engines... makes sense, when you think about it!

woodly1069 · 11-14-2012, 01:09 PM

Love it!

Rob Farmer · 11-14-2012, 01:37 PM

Quote:

Originally Posted by bpeckm

Always fascinated that the power take-off (gearbox) is at the nose end of the engine that we all know so well..... but there are a lot of ultralights out there powered by R100 engines... makes sense, when you think about it!

The power take offs on the rear of the engine in the video (look at the oil filler) The heads are on back to front.

Airhead Wrangler · 11-14-2012, 01:41 PM

Quote:

Originally Posted by bpeckm

Always fascinated that the power take-off (gearbox) is at the nose end of the engine that we all know so well.....

The one above appears to be at first glance due to the headers coming off the engine, but look closely. You can see the oil filler and timing plug on the same side of the cylinder as the headers !?!? They must've done some big time modification on that engine. That means they're using a left side head on the right side and vise versa. It also means they must've ground a custom cam to make that work. Yikes. Crazy shit.

Airhead Wrangler · 11-14-2012, 01:43 PM

Quote:

Originally Posted by Rob Farmer

The power take offs on the rear of the engine in the video (look at the oil filler) The heads are on back to front.

Damn. Rob beat me to the punch by 4 minutes.

bmweuro · 11-14-2012, 02:21 PM

Look at which end the exhaust is coming out of the head.

Jon-Lars · 11-14-2012, 04:53 PM

Quote:

Originally Posted by bmweuro

Look at which end the exhaust is coming out of the head.

???

bmweuro · 11-14-2012, 10:22 PM

Quote:

Originally Posted by Jon-Lars

???

It's coming out of the intake side.

Airhead Wrangler · 11-15-2012, 06:07 AM

Quote:

Originally Posted by bmweuro

It's coming out of the intake side.

Chris, what's your take on how they did this? They must be using a left head on the right side and vise versa, but they would've had to grind a custom cam to make this work, right?

bmweuro · 11-15-2012, 09:27 AM

Quote:

Originally Posted by Airhead Wrangler

Chris, what's your take on how they did this? They must be using a left head on the right side and vise versa, but they would've had to grind a custom cam to make this work, right?

I wanted to do the same thing to a motor for my chopper build so I found the company that makes a new 308 cam for the 79 motors and yes they flipped the pistons and heads left to right.

Rob Farmer · 11-15-2012, 09:58 AM

Theres an article here on Aero conversions. Nothing about reversing the heads though http://www.esatclear.ie/~xair/conversion.htm

US_Marshall · 11-15-2012, 12:31 PM

As long as the cam profile is the same for intake and exhaust, you should be able to just put the cam timing 180 out.

Airhead Wrangler · 11-15-2012, 12:38 PM

Quote:

Originally Posted by US_Marshall

As long as the cam profile is the same for intake and exhaust, you should be able to just put the cam timing 180 out.

MMM, no. You'd still have your intake openning for the exhaust stroke and your exhaust openning for the intake stroke. Putting it 180 degrees out won't change the sequence. That engine won't run.

11-14-2012, 07:36 AM	#1
ozmoses ^OP Ride On Joined: Jul 2009 Location: USA Oddometer: 1,048	is it an Aero-head? http://msn.foxsports.com/other/story...us-team-111412 __________________ Opinions are like internet connections- everybody has one.

11-14-2012, 10:26 AM	#3
bpeckm Grin! Joined: Apr 2008 Location: Road Island Oddometer: 4,429	Always fascinated that the power take-off (gearbox) is at the nose end of the engine that we all know so well..... but there are a lot of ultralights out there powered by R100 engines... makes sense, when you think about it! __________________ XS650 becomes a Vermont Backroader R60/6 gets caffeinated Portsmouth RI

11-14-2012, 01:09 PM	#4
woodly1069 Beastly Adventurer Joined: Jun 2008 Location: Louisville, KY...really too far from the hills! Oddometer: 1,091	Love it! __________________ If you can't fix it with a hammer, you've got an electrical problem!

11-14-2012, 02:21 PM	#8
bmweuro Mad Scientist Joined: Nov 2003 Location: Chico, California Oddometer: 2,952	Look at which end the exhaust is coming out of the head. __________________ BOXER Metal BMW Biker Scum BMW Mad Scientist! VBMWMO #7770, BMW MOA #48694 & Airhead BMW Club #600

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11-14-2012, 09:23 AM	#2
Rob Farmer Beastly Adventurer Joined: Aug 2002 Location: Loughborough, Leicestershire. England Oddometer: 3,733	Now this is an aero head

11-15-2012, 09:58 AM	#13
Rob Farmer Beastly Adventurer Joined: Aug 2002 Location: Loughborough, Leicestershire. England Oddometer: 3,733	Theres an article here on Aero conversions. Nothing about reversing the heads though http://www.esatclear.ie/~xair/conversion.htm

11-15-2012, 12:31 PM	#14
US_Marshall Adventurer Joined: Jul 2012 Location: Ct Oddometer: 44	As long as the cam profile is the same for intake and exhaust, you should be able to just put the cam timing 180 out.