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Old December 30th, 2009, 03:42 AM   #26
bigguy
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Default Re: rotary engine

subie due to less heat and less issues with starting.
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Old December 30th, 2009, 04:11 AM   #27
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Default Re: rotary engine

Subie seems the way everyone is going, kind of like an updated aircooled. They also have places that now sells parts to make the swap even easier. I think the biggest issue with the subie is the oil sump is really low. So you either need to be really careful when driving or make/purchase a shortened sump.
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Old December 30th, 2009, 05:18 AM   #28
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Default Re: rotary engine

I'm doing a Subbie 2.2- using a Porsche 914 5 speed. Setting the engine in the back seat. Tube frame.
Got parts, just haven't started yet.
Using the Kennedy adapter plate.
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Old December 30th, 2009, 05:20 AM   #29
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Default Re: rotary engine

Subaru hands down, over a rotary.
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Old December 30th, 2009, 05:25 AM   #30
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Default Re: rotary engine

It sounds like you are making yours mid-engine. If you are going to do all of the work to make it mid engine why wouldnt you use the Subaru trans?
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Old December 30th, 2009, 05:29 AM   #31
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Default Re: rotary engine

how much boost can you even run on a rotary vs. a subie???

i never realised there were heat problems with a rotary, why??? just the cooling aspect in a vw or what?
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Old December 30th, 2009, 05:43 AM   #32
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Default Re: rotary engine

Depends on the Subaru engine and the rotary. According to Outfront it says 10 lbs on t3/t4 turbo and a stock block DOHC OR SOHC. However if you go to the Subaru sites there are guys running far more boost then that. I think a rotary engine will take lots of boost in stock form and even more with upgraded apex seals. Rotarys run very hot and therefore you have to have a good radiator and oil cooler set up. The subaru engine is also a bit more reliable and "refined" then a rotary. The answer to why the rotary runs hot is....I have no idea I just know that it does, I would think it would be due to the strange engine design.
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Old December 30th, 2009, 09:19 AM   #33
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Default Re: rotary engine

Quote:
Originally Posted by eros8201 View Post
Subie seems the way everyone is going, kind of like an updated aircooled. They also have places that now sells parts to make the swap even easier. I think the biggest issue with the subie is the oil sump is really low. So you either need to be really careful when driving or make/purchase a shortened sump.
That's usually not that much of a problem since most conversions I've read through used a bus transaxle which basically requires doing a trans raise to fit into a type 1 chassis.

Subie to vw swap just makes more sense because you are trading one 4 cyl horizontally opposed boxer engine for another. It's a shame in a lot of ways that the wasserboxer wasn't more successful. Subaru basically took the idea and ran with it. I've never really looked into the 6 cyl subies.
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Old December 30th, 2009, 09:35 AM   #34
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Default Re: rotary engine

My (wifes) 3.0H Subie (Outback LL Bean Edition) fucking MOVES!!! It hits 90 with no problem and feels like your doing 45.

IF I ever put water in a bug it would be a Subie, no question! But I would try to figure out how to put a 6 in it and not the little 4. If your going through the problem make it worth it!
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Old December 30th, 2009, 09:56 AM   #35
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Default Re: rotary engine

Quote:
Originally Posted by Scott76 View Post
IF I ever put water in a bug it would be a Subie, no question! But I would try to figure out how to put a 6 in it and not the little 4. If your going through the problem make it worth it!
MIGHT be able to shorten the pan, then run longer trailing arms.
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Old December 30th, 2009, 11:15 AM   #36
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Default Re: rotary engine

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Originally Posted by eros8201 View Post
The answer to why the rotary runs hot is.
Slightly strange engine design. But the truth to it is 6 firing points to one revolution. oil to make the apex seals seal and in general it loves fuel.There is also the fact that the engine has no real quench time for the combustion chambers like a conventional 4 stroke. add all that in a package that is the size of a 5 gallon pail and you have all the issues.
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Old December 30th, 2009, 12:02 PM   #37
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Default Re: rotary engine

i know a guy with a subie 6 in his vanagon, pulls his two harleys aroudn at 80 with no problems, only issue he had is he needed a new muffler and it was kind of hard to find one for it with that set up. really cleanly done too
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Old January 3rd, 2010, 01:22 PM   #38
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Default Re: rotary engine

With the different Subies- the 2.2 has been bullet proof in airplane applications that run at a sustained rpm. The 2.5 has more ponies but weighs in more too and has had a few problems but, still very reliable. A friend has the 6 cylinder in his plane. Again more horses but a lot more weight.

For the street- I think the 2.2 with just a few mods makes a cheap, real good horsepower and reliable option. Again just my 2 cents from what I have seen from these motors first hand.
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Old January 3rd, 2010, 01:33 PM   #39
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Default Re: rotary engine

Rotaries lack torque, which is what gets you moving.
They only make "power" by turning lots of rpm.

An Eaton blower and intercooler with EFI might give reasonable performance.
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