Jump to content
HybridZ

VW Bay Window Bus - Subaru Powered


Recommended Posts

  • Administrators

Made a little progress today. I was running 50/50 anti-freeze which is about a 20% penalty in heat transfer. I purged the system and refilled with distilled water and a 12oz bottle of Red Line Water Wetter. Took it for a drive up Mt. Hood and my temps are around 15 deg. cooler.

 

I live on twisty hilly mountain roads and on the way back I drove it like a wannabe race car for about 5 miles, loading it heavily on the hills and coming out of low speed turns. The hottest it got was 203. Not sure what it would creep up to if I dropped a fan, but those numbers are livable for a summer day.

 

This means I may end up running a summer and winter coolant, but I may end up finding a fair compromise over time.

 

If I can get about 20 to 25% more airflow through the radiator I think I’d have this nailed for anything I’d want to do with it.

Link to post
Share on other sites
  • Replies 117
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

Video as promised. Sounds a lot like an air-cooled V-dub       It’s idling fast in the video – about 1600 RPM. I’m still sorting out the E-Throttle, which doubles as my fast idle control.

Posted Images

The most diplomatic way to explain the way I feel about Jake is to say that I’m not his number one fan.

To each his own, I can see how someone could arrive there.

 

Most workable solution from the water cooled bay guys are two honda civic radiators in series one on each side using the original cooling vents.

 

Belly mount has been very good as well if you have the ground clearance.

 

Not really telling you anything you don't know already probably, but the people on thesamba.com have already skinned this cat.

Link to post
Share on other sites
  • Administrators

I looked at the Evans stuff a while back and seem to remember higher boiling points, better surface tension, etc, but I may have overlooked the heat transfer properties. I'll take another gander.

 

I've got an idea that I think will meet my needs/wants. Going to do some experimenting with a Magnehelic first to see if its plausible or delusional.

Link to post
Share on other sites

I looked at the Evans stuff a while back and seem to remember higher boiling points, better surface tension, etc, but I may have overlooked the heat transfer properties. I'll take another gander.

 

I've got an idea that I think will meet my needs/wants. Going to do some experimenting with a Magnehelic first to see if its plausible or delusional.

 

Are you taking measurements on the air side or coolant side or both?  I would be really interested in any air pressure/air flow measurements you might take

Link to post
Share on other sites

Had to rush that post because my son needed me.

 

I was asking if you were taking measurements of air pressure or coolant pressure. I have read that some Subi swaps have insufficient coolant system pressure to prevent boiling prior to the radiator.

 

I would be interested in the pressure drop across the radiator if you are willing to share.

 

I am an test engineer at a big windtunnel facility by trade. I have been wanting to break out a differential pressure gauge to measure air pressure in the engine bay for some time now. I have to stuff an intercooler and AC condenser back there when I get my diesel conversion finished.

Link to post
Share on other sites

Saw a VW Bus with an EJ22 swap at a car show today. His solution to the radiator mounting problem: mount it on the roof!

 

Nice job Ron!

 

Make a Spitfire-Style Radiator Box and flow-through ducting.... Maybe one of those F5000 Style Ducts on the roof... Yeah, I can see that... yeeeeaaahhh....

Link to post
Share on other sites
  • Administrators
I have read that some Subi swaps have insufficient coolant system pressure to prevent boiling prior to the radiator.

 

I would like to hear more about that. I believe I’m getting a good bleed and a good seal. Curious though, can you point me where you are seeing this, please?

 

 

I would be interested in the pressure drop across the radiator if you are willing to share.

 

Will do.

Link to post
Share on other sites

Make a Spitfire-Style Radiator Box and flow-through ducting.... Maybe one of those F5000 Style Ducts on the roof... Yeah, I can see that... yeeeeaaahhh....

 

I believe his ducting was a Coleman Grill cover... :lol:

 

Wish I took a photo! Here's one I found:

 

Bayline-59-800x533.jpg

 

Taken from: http://www.speedhunters.com/2014/08/getting-nostalgic-norcal-bayline-gathering/#chapter-legends-rarities

Link to post
Share on other sites

Just as an aside, that race-taxi has about 205 more HP than my 62 did, but it's 1500kg, and my bus was only 2315# plus my 175 (ahem, "at the time")!

 

Try that with worn center post bushing ... Suddenly 15:30@89.990 mph never sounded so death defying!

 

I should have been able to pull 12's with that engine...but snapping axles, and jacking stink bug actions with 5.60-15 tires really limited it... Though a crowd pleaser was busing the wheels loose into JC Penny $19 each Bias-Ply Retread Boiling Rolling Burnouts at the top of second gear about 30 mph through 3rd when the boost came on.

 

As I aged, I found a 175hp Turbo 2-Liter was a nice ride and ran slightly faster in the 1/4...

 

Now this shows up....

 

You BAStard!

 

Well, there is the '66 I guess!

 

Or...hey, what you think I can get out of 657ccs of turbocharged Suzuki Fury?

 

post-380-0-52560200-1407604095_thumb.jpg

Edited by Tony D
Link to post
Share on other sites

I would like to hear more about that. I believe I’m getting a good bleed and a good seal. Curious though, can you point me where you are seeing this, please?

 

 

 

Will do.

Take a look at this guys build. Discussion on temps is half way down page 18 or 19.

 

http://www.thesamba.com/vw/forum/viewtopic.php?t=562094&postdays=0&postorder=asc&start=360

Link to post
Share on other sites
  • Administrators
Now this shows up....

 

You BAStard!

 

 

     I finally got Tony to curse me. Mission accomplished! :mrgreen:

 

Or...hey, what you think I can get out of 657ccs of turbocharged Suzuki Fury?

 

 

     The Fury looks way cool. Engine size a little on the little side. Is there room for something meatier? Maybe the Chevy Cruze 1.4 Turbo motor? Or even a Suby?

 

 

Take a look at this guys build. Discussion on temps is half way down page 18 or 19.

 

 

    Oh heavens. Looks like his issue was trapped air in the heater core & plumbing. I’m not running a heater (yet) and have absolutely no issues getting mine burped. Still, after he figured that out, he’s idling at a higher temp than I am running down the road at 60. I just got back this morning from an 80 mile round trip on the freeway with about a 400lb payload and never broke 200 degrees (oil temp was around 220). His idle temps are higher than that… with his fan on.

 

     Mine does nothing evil or inconsistent. It’s very stable and predictable. It’s never come close to actually getting *hot*. The thing that I’m wanting to address is having more margin for failure, i.e. I’d like to rely less on the fans and more on natural airflow.

 

Link to post
Share on other sites
  • Administrators

Got around to doing some testing with a Mag.

 

MagnehelicTest-Magnehelic_zps7cda51da.jp

 

MagnehelicTest-HighPressurePort_zps11ce4

 

MagnehelicTest-LowPressurePort_zps94b3b3

 

 

 

And the results are… nearly zero pressure differential at 40 & 50mph. Got a tenth of an inch or so of water column at 60mph (fans were off). I was expecting to see a small differential, but I wasn’t expecting to see practically nothing. Frankly I’m amazed at how well it’s doing on just fans and a quality radiator.

 

I tied a streamer to the upper intake vent to make sure airflow was from the top and downward and not the opposite. Went for another drive (fans off) and the streamer confirmed the correct airflow direction.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...