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Vee Dub Nut's 74 Bay Transporter (& Subaru EJ25 Swap)
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Vee Dub Nut
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Joined: April 25, 2004
Posts: 1046
Location: NW Georgia
Vee Dub Nut is offline 

PostPosted: Tue Nov 19, 2019 10:29 am    Post subject: Re: Vee Dub Nut's 74 Bay Transporter (& Subaru EJ25 Swap) Reply with quote

panel wrote:
What's next for this thing.......power windows Laughing . I love this thing and your updates!


Thanks Panel! No power windows in the works Laughing

Been testing the heater the past few days. Yesterday it seemed to work pretty well, but I never had to back off the valve to knock any heat out of the air. Made me think that maybe output was a little lower than I expected/hoped. So last night I jacked it up and made an adjustment to the cable at the control valve to make 100% sure I was getting it full open. When driving it in again today I was plenty warm, and eventually ended up throttling the valve back to knock some heat out of the air. I also haven't run the fan any higher than low speed, as even at low speed it moves plenty enough air. With where the cable is set right now, I can effectively control the action on the control valve from ~50% to 100% full open. I'll try to improve this in the future to get a better/full range on the valve, but I wanted to make sure I could get it all the way open to test overall capacity, so I really over adjusted it (I have some dead-band on the control now at full open).

I will say that Skills description of "central air" type feeling of warm with a rear mounted heater is pretty accurate. Its comfortable, but not particularly hot in any one area. You don't get that warm air blast feeling like you might in a modern car. If I drop my hand down between the front seats with the heater running, I can certainly feel warm air. It actually feels deceptively cool to some extent, but considering my hand is a good 2-2.5 feet away from the heater outlet, there is plenty of cold air mixing before I can feel it at my hands. If I stretch and reach further back, you can certainly feel more heat as you get near the heater itself. I would like to stick a thermocouple or something there and actually read duct discharge temperature while driving around just to see what it is. Regardless of that actual number though, the heater seems to do just fine making the Bus very comfortable to drive in.

Interestingly, now that I have warm air in the Bus while driving, I can now feel where the drafts and leaks are in the Bus. Never could tell before Laughing Need to probably refresh the seals on the fresh air flapper up front I think, as I'm getting a steady small flow of cold air out of the dash vents even with the lever "closed".

All and all I'll call this a success. If I make any other adjustments to the setup, I'll be sure to post up here!
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle (1500sp, 1776dp, 1915NA, 1915T fuel injected, 2276NA, 2276T fuel injected, 2084NA, T4 conversion coming soon!)

74 Transporter (2.0 T4, SOHC EJ25) - Build Thread: https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

See all my VW pics on Instagram @ vee_dub_nut

Clatter wrote:
The only cheap part of an aircooled VW sits behind the wheel..
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danfromsyr
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Joined: March 01, 2004
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Location: Syracuse, NY
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PostPosted: Tue Nov 19, 2019 10:40 am    Post subject: Re: Vee Dub Nut's 74 Bay Transporter (& Subaru EJ25 Swap) Reply with quote

that's not really any different than my Astro van operates with it's rear heater.
there's alot of air volume and glass back there.
and if I mix the front heater it's only blows how @ 90-100-red on the temp knob. Astro coolant is ~205*

IMO if your engine coolant temps are @ or below 180*f you're not going to get splendid heat no matter. back in the old days of old cars (with poor/inefficient cooling systems, we'd change the T-stat for winter/summer temps.
but that shouldn't be necessary in these modern car systems.

we don't hear any of these complaints in the vanagon forum re; heater performance on swapped vans, and they have the same long runs to the front..
though the actual core and flow path differences have alot to factor as well.
but it's not because it's a long run and the waterpump can't push it.

my 1980 1.8T swapped vanagon I'll have to open a window because I've never hooked a cable to my coolant valve.. it's either open or closed. but that's some different apples and I don't run @ 180*f
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Vee Dub Nut
Samba Member


Joined: April 25, 2004
Posts: 1046
Location: NW Georgia
Vee Dub Nut is offline 

PostPosted: Tue Nov 19, 2019 11:07 am    Post subject: Re: Vee Dub Nut's 74 Bay Transporter (& Subaru EJ25 Swap) Reply with quote

danfromsyr wrote:
that's not really any different than my Astro van operates with it's rear heater.
there's alot of air volume and glass back there.
and if I mix the front heater it's only blows how @ 90-100-red on the temp knob. Astro coolant is ~205*

IMO if your engine coolant temps are @ or below 180*f you're not going to get splendid heat no matter. back in the old days of old cars (with poor/inefficient cooling systems, we'd change the T-stat for winter/summer temps.
but that shouldn't be necessary in these modern car systems.

we don't hear any of these complaints in the vanagon forum re; heater performance on swapped vans, and they have the same long runs to the front..
though the actual core and flow path differences have alot to factor as well.
but it's not because it's a long run and the waterpump can't push it.

my 1980 1.8T swapped vanagon I'll have to open a window because I've never hooked a cable to my coolant valve.. it's either open or closed. but that's some different apples and I don't run @ 180*f


My coolant is certainly sitting right at 180F with the cold weather. That's just where the stock t-stat regulates too given ample cooling from the radiator (regardless of outside temp). So perhaps that is a factor to some extent, but not one I intend to mess with. I'm a big proponent of using the factory subi tstat, as aftermarket ones don't work well on these engines. I also certainly don't want to get into changing tstats with seasonal changes. Just hypothetically speaking, if the coolant temp was running +20F higher around 200F instead of 180F, I would expect to see a pretty similar increase in actual output temperature at the heater too (not 1:1, but quite a large jump).

It would be interesting to me to see actual coolant temp AND flow through the heater core lines under a range of conditions. Not something I intend to mess with, but I do think there are some influences from the t-stat action and engine speed that plays into how much water volume/flow you actually get in the heater loop.

Also, from looking though some of the vanagon info, it seemed to me that how most folks are plumbing in their heaters with are a little different than using the "normal" heater core inlet/outlet on the subi engine. Not sure what impact that might also have too.
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle (1500sp, 1776dp, 1915NA, 1915T fuel injected, 2276NA, 2276T fuel injected, 2084NA, T4 conversion coming soon!)

74 Transporter (2.0 T4, SOHC EJ25) - Build Thread: https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

See all my VW pics on Instagram @ vee_dub_nut

Clatter wrote:
The only cheap part of an aircooled VW sits behind the wheel..
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Vee Dub Nut
Samba Member


Joined: April 25, 2004
Posts: 1046
Location: NW Georgia
Vee Dub Nut is offline 

PostPosted: Thu Feb 06, 2020 10:54 am    Post subject: Re: Vee Dub Nut's 74 Bay Transporter (& Subaru EJ25 Swap) Reply with quote

Figured I'd better pop in here and give an update on this thread. Haven't really done a whole lot to the Bus except drive it (that's how its supposed to be!). I've got something like >6k miles on the swap since it was "finished". Been "done" for a touch over a year (~Nov 2018 I think?). Clearly not a daily drive, but we get out and drive it every chance we get. Tons of smiles and miles so far.

Heater Update: The heater continues to work brilliantly! I've been meaning to get another thermocouple setup mounted and take some temps while cruising down the road. Pretty confident that actual discharge temps are quite a bit warmer when driving around with some load on the engine, than what I initially measured in the garage with just it idling. It will flat cook you right out of the thing. I only ever use the fan on low speed, as it moves PLENTY enough air. I've been out a few times in wet ~30ish degree weather in just a t-shirt comfortable as can be.

Sliding door: I FINALLY tore into my sliding door and went through all the latches, rollers, and slider mechanism. It had always been finicky, but one of those things that never seemed to get to the top of my list. Since its been running so well and I haven't had to do anything else to it, the slider finally crept up to the point where I took one Saturday afternoon to attack it. Pretty simple process, just time consuming. Slider works like brand new again though.

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Link


Front Seats: I've also started in on another small project for the Bus. I'm a pretty tall guy (6'5"), and the stock front seats have always been only marginally comfortable to me. The biggest issue being, once I get the base of the seat far enough back to give me some leg room and make it somewhat easy to get in/out with my right foot & leg past the column, the backrest of the seat ends up being far too vertical for comfort. For this reason (as well as me always keeping the idea of wheel tubs in mind for "someday"), I've kept an eye out for a used set of 914 seats that I could swap in. 914 seats are probably about the thinnest factory style seat your going to find, and being of that mid 70's vintage, still look the part with some basket weave vinyl. My hope has been that the thin backrest would allow me to slide the seat back just a touch more and give me a better backrest feel without feeling like I'm sitting straight up. I managed to pick up a set locally from an old Porsche shop. They need to be re-covered, but the were priced OK, and I could pick them up without having to deal with shipping. I'm just now messing around with how they will fit. Below are a few pics that show the differences in the seat thickness. My plan is to mount them at the same elevation level as the current seat. That ends up putting the seat ~2" higher than the current wheel tub height, so *IF* I decide to go ahead and tub this thing someday, I've got room for them to come up without pushing me up any higher. For now I'll just likely build up some brackets to keep the seat in the same elevation as stock. I'll keep yall posted how this comes together

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Random photo dump: Beyond all that, here are just some other random photos from the past few months.

First up from my deck rebuilding adventure. What do you do when you forgot to order some 16' 2x10's after you've already had the bulk order for the rest of the material delivered to your house? You use the Bus of course! I've got a truck, but its short 6' box was no match for the 16' timbers. The Bus however handled it like a champ. Before the project was finished, I hauled several loads of boards back and forth from the big box store to home, as well as half a dozen 16' wire hog panels for my deck railing. This thing is handier than a swiss army knife!

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Lastly, a sight for sore eyes after a LONG day at work. Drove it in one day a few weeks ago since the weather was going to be extra nice. Thought it would make for a great ride home. Things went sideways at work when I had an engine failure on the dyno, which then kept me there late getting a replacement instrumented and swapped on to not interrupt the next days testing. After pulling into work almost 14hrs earlier, it was sure nice to see the Bus waiting for me in the dark empty parking lot. Still had a nice drive home Cool

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All for now!
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle (1500sp, 1776dp, 1915NA, 1915T fuel injected, 2276NA, 2276T fuel injected, 2084NA, T4 conversion coming soon!)

74 Transporter (2.0 T4, SOHC EJ25) - Build Thread: https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0

See all my VW pics on Instagram @ vee_dub_nut

Clatter wrote:
The only cheap part of an aircooled VW sits behind the wheel..
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View user's profile Send private message Instagram Gallery Classifieds Feedback
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