RE: asp 160 twin vs asp 120  
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RE: asp 160 twin vs asp 120 - 5/25/2005 6:19:25 AM   
William Robison



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From: Mary Esther, Florida, FL, USA
Status: offline 		Rupurt:

As nearly as I can make out, the ASP 160 when bought under the Magnum name from Hobby People does not include the plug leads or wrenches. For the price difference to the OS 160 twin you can buy a whole bunch of plug leads and tools, still having a lot left over.

Bill.

PS: I too would like to see an ASP/Magnum flat four. wr.

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RE: asp 160 twin vs asp 120 - 5/25/2005 6:28:51 AM   
Rupurt



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From: Cape TownN/A, SOUTH AFRICA
Status: offline 		I think I will order the engine on friday, its quite exiting, it will also be my first four stroke. Will I need to pump the fuel, if so will a perry pump work.

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RE: asp 160 twin vs asp 120 - 5/25/2005 6:46:25 AM   
William Robison



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From: Mary Esther, Florida, FL, USA
Status: offline 		Rupurt:

I would not have suggested a twin for a first 4s engine, there are more things to check and a different feel for adjusting them than on a 2s engine. One cylinder at a time is enough when learning. Just be careful and remember "RTFM!" (Read the freaking manual)

Unless you put the tank a long way from the engine muffler pressure will work fine. If you decide to go for a pump anyway use the VP-30, the engine is a little too smooth running for the VP-20 to be reliable.

The engine might even run fine without muffler pressure, it has good fuel draw.

Bill.

PS: Kevin, how did you come up with "Rupurt" as a user name? wr.

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RE: asp 160 twin vs asp 120 - 5/25/2005 6:59:55 AM   
Rupurt



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Status: offline 		From the little white bear, but i think it is supposed to be rupert but i would imagine that name is taken.

I think a have a fair understanding of engines so i don't think i will have to much trouble, it is a ringed engine so i should be alright running it rich, while it is breaking in I can get a feel for it(i will do this on a test stand).

I dont plan on running it with mufflers. the perry pump ,as far as i know uses pulses from the crankcase to pump how does this work with the four stroke as the crankcase pressure needs to be relieved.

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RE: asp 160 twin vs asp 120 - 5/25/2005 7:03:45 AM   
Rupurt



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From: Cape TownN/A, SOUTH AFRICA
Status: offline 		Oh yeah i sure the F stands for freaking.

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RE: asp 160 twin vs asp 120 - 5/25/2005 7:10:00 AM   
Rupurt



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Status: offline 		"Rupert The Bear
Less well-known on American shores than he is at home in England, this hairy denizen of Nutwood Forest has been delighting children since 1920, when he debuted in the Daily Express newspaper. The first annual appeared the following year; a second appeared under the title of The Monster Rupert Annual in 1931. This series ran every year until 1950, competing for much of that time with The Daily Express Rupert Annual, which debuted in 1936."


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RE: asp 160 twin vs asp 120 - 5/25/2005 7:22:48 AM   
William Robison



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Status: offline 		Sir:

quote:

ORIGINAL: Rupurt
Oh yeah i sure the F stands for freaking.

On RCU "F" always stands for "Freaking." I'll admit, if we were on the flight line it just might possibly be a different word.

Haw.

The VP-30 pump is driven by the crank case pressure pulses, yes. But it doesn't take much of a pulse, so the case vent line is run to a tee with the short end going to the pump, and a longer than usual atmosphere vent hose gives enough restriction to work the pump while still venting the case.

Interesting about Rupert the bear. I had never heard of him. I was quite familiar with "Punch and Judy" though, my dad subscribed to "Punch" magazine for years. It permanently warped my mind as well as my sense of humor. Haw again.

Bill.


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RE: asp 160 twin vs asp 120 - 5/25/2005 7:32:34 AM   
Rupurt



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Status: offline 		Thanks for the advice bill i will post an update when I have news

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RE: asp 160 twin vs asp 120 - 5/25/2005 2:13:54 PM   
Rupurt



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Status: offline 		News already! I have made up my mind and ordered the engine, hopefully it will be here next week. I will try it in the plane before buying a pump.

Being a four stroke wouldn't it benefit performance to put some kind of scoop on the carb for a higher manifold pressure, like suzuki use on their bikes (SRAD, Suzuki Ram Air Direct, I think).

I read some of a Punch magazine a few years ago but didn't understand it, to young I think. Probably should try again.

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RE: asp 160 twin vs asp 120 - 5/25/2005 4:21:16 PM   
William Robison



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Status: offline 		Rupurt:

Ram air? More trouble than it's worth. It aggravates the tendency to go lean with increasing air speed - the intake air pressure rises but the fuel pressure does not. Just be sure the carb has fresh air to it.

Bill.

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RE: asp 160 twin vs asp 120 - 5/25/2005 4:26:48 PM   
Rupurt



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Status: offline 		OK didn't think about that.

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RE: asp 160 twin vs asp 120 - 5/25/2005 5:29:30 PM   
William Robison



Posts: 20269
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From: Mary Esther, Florida, FL, USA
Status: offline 		Rupurt:

One thing that can help a lot is adding about one inch of pipe to the carb intake side. here's a thread about stacks on mainly Saito, but the same principles apply. Go down to post #22 for an installation shown on one of my Magnum two stroke engines - that's the way your 160 twin will have to be done.

Bill.

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RE: asp 160 twin vs asp 120 - 5/25/2005 10:48:08 PM   
Rupurt



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Status: offline 		Bill a two stroke is a whole new world when it comes to any kind off charged induction system, I am almost prepared to say that a standard 2 stroke will not benefit at all from any kind of charged system.

Pls don't take this as an arrogant statement but it is what I believe from my understanding of 2strokes.

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RE: asp 160 twin vs asp 120 - 5/25/2005 11:15:30 PM   
Rupurt



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From: Cape TownN/A, SOUTH AFRICA
Status: offline 		Captin is the kavan engine an ornament or are there plans for it? are the continently tappet covers standard?

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RE: asp 160 twin vs asp 120 - 5/25/2005 11:17:07 PM   
William Robison