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markd89
Samba Member
Joined: November 04, 2005
Posts: 675
Location: Los Angeles
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 Posted: Thu Oct 31, 2013 6:27 pm Post subject: |
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JonnyPhenomenon,
Cool bus!
Did you retain the original bellhousing transmission mount or are you just mounting the trans at the nosecone end?
If you have more pics, please post!
Mark
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78 TDI Sunroof Bus
Los Angeles |
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JonnyPhenomenon
Samba Member
Joined: November 03, 2009
Posts: 11
Location: Lewiston, Maine, USA, Earth
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| Posted: Mon Nov 04, 2013 8:04 am Post subject: |
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lets see if I can quickly clarify some things and answer some of your questions...
First, the engine is a 93 obd1 12v distributor vr6. not coil packs. the engine electronics/ECU, Fuse box, and coil are all mounted in the spare tire well.
the overheating issues have been solved by adding the secondary water pump, oil cooler, and lowering the highway rpms.
Note:
I never had overheating problems during city driving. I only had trouble at highway speeds. in fact, before I swapped the tranny and got the bigger tires when the engine would get too hot all I would have to do is slow down or stop and let it idle for a while and it would come right down in temps.
...Which is what reinforces my theory that the position of the radiator (laying flat underneath the center of the bus, without any ductwork) isnt ideal, and plays a role in the poor performance of the cooling system at highway speeds. At those speeds the bus is probably creating a large pocket of negative air pressure around itself which reduces the density of the air around the radiator and impedes cooling.
My bet is that with a little bit of ductwork all of the temp issues would be resolved. Too bad we dont have access to a wind tunnel...
I have toyed with the idea of taking some pressure readings from various places around the bus to see where the highest amount of air flow can be obtained. Now that I am reminded of it, Ill go buy a pressure/vac gauge from ebay right now, and add that to my weekend to do list.
(Markd89)
RE: tranny mount, I removed the bell housing bracketry to make room for the engine and cooling hoses. the front of the nose cone is all thats holding that end up, and I used the stock vr6 rear motor mount, and we fabbed up a mirror image of it for the front side of the engine.
anyway, thats all for now. Ive got to get to work. |
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markd89
Samba Member
Joined: November 04, 2005
Posts: 675
Location: Los Angeles
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| Posted: Mon Nov 04, 2013 8:29 am Post subject: |
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Very cool!
How many miles are on the setup now?
What are you getting for MPGs?
Mark
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78 TDI Sunroof Bus
Los Angeles |
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JonnyPhenomenon
Samba Member
Joined: November 03, 2009
Posts: 11
Location: Lewiston, Maine, USA, Earth
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| Posted: Mon Nov 04, 2013 11:06 am Post subject: |
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| markd89 wrote: |
Very cool!
How many miles are on the setup now?
What are you getting for MPGs?
Mark |
Ive put quite a few miles on it with this setup. maybe 7-10k? its basically my daily driver. Ive got working heat, heated seats, a bench middle back seat for the kids, and a stereo loud enough to drown them out. what more could a guy want? 
one thing of note, those old trannys dont hold up too well to all that extra power. I am in the process of building a new tranny for it, with peloquin limited slip diff and pro cut slider gears from Long Enterprises. just waiting on a new 3-4 shift fork to arrive and then I should have killler traction for the upcoming snow season |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23392
Location: Oklahoma City
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| Posted: Tue Nov 05, 2013 1:53 pm Post subject: |
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| levi20AE wrote: |
| A VR6 is about the only VW motor I haven't built and I always avoided them due to all the cooling issues. In a mk3 and mk4 those motors had extra coolers and still had overly high oil temps during city driving. They are also longer making them a pain when mounted in golfs and jettas. Maybe the length is not an issue in a bus but the additional cooling will be. I have always been a 1.8t guy myself and never saw the draw of 6 cylinders when you can just add boost and make better numbers with better fuel economy. |
Because the 1.8t was an absolutely miserable design in its first 4 years...reliability wise. It had heat issues, valve issues etc.....and again...just like the Vr6...it depends on which one you used. Lots of little difference. 4 valve...5 valve....different compression and bores. The Audi usnits had little toruble. The VW units had issues. Ray |
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vwwestyman
Samba Member
Joined: April 24, 2004
Posts: 5868
Location: Wamego, Kansas, USA
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| Posted: Tue Nov 05, 2013 2:35 pm Post subject: |
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| JonnyPhenomenon wrote: |
| markd89 wrote: |
Very cool!
How many miles are on the setup now?
What are you getting for MPGs?
Mark |
Ive put quite a few miles on it with this setup. maybe 7-10k? its basically my daily driver. Ive got working heat, heated seats, a bench middle back seat for the kids, and a stereo loud enough to drown them out. what more could a guy want?
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I'm interested in details in how you have your heater set up-where the core is, what you use for a fan, how you control it, etc.
Thanks! |
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levi20AE
Samba Member
Joined: June 24, 2005
Posts: 485
Location: Las Vegas, NV
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| Posted: Tue Nov 05, 2013 7:43 pm Post subject: |
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Are we talking about the same 1.8T???
| raygreenwood wrote: |
| Lots of little difference. 4 valve...5 valve.... |
???? They all had 20 valves, 5 per cylinder.
| raygreenwood wrote: |
| compression and bores. |
???? They all had the same bore and stroke in every motor, even the earlier external water pump blocks were the same. Compression was exactly the same for every 1.8T variant except the AWM, lowered from 9.5:1 to 9.3:1.
| raygreenwood wrote: |
| The Audi usnits had little toruble. The VW units had issues. Ray |
The early cars had oil sludging issues from bad owners never changing oil but they fixed that by using the larger oil filters that held almost a quart of oil. That was the same for the A4 and the Passat not a VW vs Audi problem.
There were small differences between turbos but most of the performance differences were the maps for timing and boost in the software.
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1973 Campmobile http://www.thesamba.com/vw/forum/viewtopic.php?t=524511&postdays=0&postorder=asc&start=0
20th AE VW GTI - 369hp 340tq @ 26 PSI
1982 Rabbit Pickup - German AAZ 1.9TD - daily with lots of MPGs |
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JonnyPhenomenon
Samba Member
Joined: November 03, 2009
Posts: 11
Location: Lewiston, Maine, USA, Earth
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| Posted: Wed Nov 06, 2013 6:46 am Post subject: |
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| vwwestyman wrote: |
I'm interested in details in how you have your heater set up-where the core is, what you use for a fan, how you control it, etc.
Thanks! |
hah! yeah, its pretty crude really, Ive just got two little oil cooler style radiators with little 12cm computer case fans connected to a switch on the dash. they are sitting on the floor in the front.
this is the only pic I can find of it.
it does a heck of a job heating up my ankles! 
actually, I have stuck a piece of cardboard in front of the drivers side one to deflect it upward so it heats more uniformly. This is all temporary, and I eventually will be building a proper heater box with blend flaps and whatnot that will be installed under the front cabin floor.
The VR6 engine has a little auxilliary water pump for the heating circuit which comes on when I flip the switch for the fans. this gets those little radiators hot enough to heat the whole bus in no time.
combine this with the heated seats I just installed, and the bus is cozy enough for t-shirts and shorts even on the coldest days. |
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Bansheelos
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Joined: February 27, 2012
Posts: 313
Location: NY/NJ
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