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Old 09-16-2003, 06:29 PM   #1 (permalink)
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Tacoma on board air

Just finished it up today, here's a quick writeup on what i have and how it works, i didn't take any pictures of the installation, but i took some of when it was done. Overall i am very happy with the way it turned out, I completely deflated the two 35 12.5 15 MTR's all the way down to 0 PSI so the rim was touching the ground, and this OBA pumped both of them back up to 35PSI within 7 minutes. Tomorrow i will give it a real workout as i am going wheeling.

What i have is a York (actually a Mini York) out of an 82 VW something or another, it's pretty small, and the fittings are on the back instead of on the top like most yorks, I built a manifold out of 2 Brass 4 way fittings, and 1 3 way fitting, i also got a pressure switch from a local rice boy shop, that turns on at 80 and shuts off at 105. I installed a quick connector at the manifold incase i loose both of my tanks, My tanks also have quick connectors incase one blows, i can remove it from the system.

The tanks are 4 inch schedule 40 PVC (I know some of you are thinking "I wouldn't use PVC", but where I work all of the air is run through PVC and have never had a problem with it. and if it ever blows, i'll just replace it with steel tanks) the tanks are installed right under the rocker panel's on both sides, they sit above my sliders, and have quick connectors on both ends,

The last photo is of a nice set of air tools from Costco for $100. The system puts out enough pressure and volume that i can run the impact enough to remove and rotate two tires.

oh and here are some pictures.

http://www.sn4wd.com/gallery/Steves-On-Board-Air


Steve
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Last edited by NorcalVP; 01-18-2008 at 06:11 AM.
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Old 09-16-2003, 06:59 PM   #2 (permalink)
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Clean! That's what I need when my little ARB gives out.
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Old 09-16-2003, 07:07 PM   #3 (permalink)
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I bet if you put a much bigger filter on the intake it would fill up tires even faster. Outside air is low pressure, so it needs a big filter to flow a decent amount of air. That's why the suction hose is bigger ID than the discharge hose too.

That filter looks tiny.

Also, I don't think you mentioned that you had to relocate your battery to put it there too...

Anyway, glad to see you got it working.

Hey, it looks like you put in a Chevy master cyl too.


If anyone cares, here's one I built for a non-supercharged 3.4L:
http://home.4x4wire.com/erik/t100/oba.htm



The SC forced Steve to do his differently, and on my T100 I didn't need to move the batt since there is plenty of room.

Last edited by ErikB; 09-16-2003 at 07:09 PM.
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Old 09-16-2003, 08:07 PM   #4 (permalink)
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Quote:
Originally posted by ErikB




The SC forced Steve to do his differently, and on my T100 I didn't need to move the batt since there is plenty of room.
Where did you get that pulley for the alterator???
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Old 09-16-2003, 08:12 PM   #5 (permalink)
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Quote:
Originally posted by ErikB
I bet if you put a much bigger filter on the intake it would fill up tires even faster. Outside air is low pressure, so it needs a big filter to flow a decent amount of air. That's why the suction hose is bigger ID than the discharge hose too.

That filter looks tiny.

Also, I don't think you mentioned that you had to relocate your battery to put it there too...

Anyway, glad to see you got it working.

Hey, it looks like you put in a Chevy master cyl too.


If anyone cares, here's one I built for a non-supercharged 3.4L:
http://home.4x4wire.com/erik/t100/oba.htm



The SC forced Steve to do his differently, and on my T100 I didn't need to move the batt since there is plenty of room.



Yeah the filter was a last minute kinda thing, it was the only thing i had in my garage at the time, i am planing on getting a nice big one.

You are correct I had to Relocate my battery but that was done over a year ago, (tells you how long i have been trying to get that in...) but i had to relocate my batt, because it's on a taco, you have a t-100 and a much larger engine bay. (jealous) But the Supercharger did give me a mounting point for my idler pully, and a place to mount a drive pully.

The Chevy MC was put in about 6 months ago, and it really helped the braking, but i still dive to the right even under light braking. I think it's time to replace the calipers....


Steve
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Old 09-16-2003, 09:11 PM   #6 (permalink)
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Originally posted by NorcalVP





Yeah the filter was a last minute kinda thing, it was the only thing i had in my garage at the time, i am planing on getting a nice big one.

You are correct I had to Relocate my battery but that was done over a year ago, (tells you how long i have been trying to get that in...) but i had to relocate my batt, because it's on a taco, you have a t-100 and a much larger engine bay. (jealous) But the Supercharger did give me a mounting point for my idler pully, and a place to mount a drive pully.

The Chevy MC was put in about 6 months ago, and it really helped the braking, but i still dive to the right even under light braking. I think it's time to replace the calipers....


Steve
Bet they're D52 calipers and 10.5 rotors huh? Probably never get that junk to work right. (No offense)
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Old 09-17-2003, 03:45 AM   #7 (permalink)
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Quote:
Originally posted by BOBBED97TACO


Where did you get that pulley for the alterator???
he got it from kilby and then had it sleeved and machined to fit.
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Old 09-17-2003, 06:29 AM   #8 (permalink)
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Looks good steve, where did you end up going with your battery?

Any way to narrow down the type of Volkswagon it came from? Or is it a pretty easy find?

Thanks
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Old 09-17-2003, 06:59 AM   #9 (permalink)
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Quote:
Originally posted by BOBBED97TACO


Where did you get that pulley for the alterator???
www.onboardair.com - modified to fit.


Steve- new calipers from NAPA are only $15/each. I haven't had any problems w/ mine at all besides the original sticky junkyard caliper (but what do you expect). My brakes work great. Dunno what Lars is talking about.

And speaking of pulley's, where is your is your drive pulley from and/or how did you do that?
I see you used a power steering idler pulley like I did, plus the bracket.

Robert- I think a full size York should fit just about as easily and is probably easier to find. Its mainly just taller, but there is plenty of room up top.

I can build more non-SC 3.4L York brackets.
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Old 09-17-2003, 08:42 AM   #10 (permalink)
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Hey Steve,
congrats on Varian Medical. I heard you got hired there from Dr. Singh. Hope all is well in the job world for you.

The on board air looks good.

KC
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Old 09-17-2003, 10:08 AM   #11 (permalink)
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Originally posted by ErikB



Steve- new calipers from NAPA are only $15/each. I haven't had any problems w/ mine at all besides the original sticky junkyard caliper (but what do you expect). My brakes work great. Dunno what Lars is talking about.

Well argueably they were on my Camaro which spent quite a bit of time at the track. Maybe on a rock crawler the brakes don't see as hard of use.

I'll have to keep the bracket offer in mind.
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Old 09-17-2003, 12:45 PM   #12 (permalink)
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Nice work guys........ BTW I added the links to the Toy FAQ.
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Old 09-17-2003, 10:59 PM   #13 (permalink)
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Bet they're D52 calipers and 10.5 rotors huh? Probably never get that junk to work right. (No offense)
I got new calipers about a year ago, but i think the one on the drivers side isn't working too well, i keep warping my passenger side rotor..... oh well hopefully i'll get it fixed soon....
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Old 09-17-2003, 11:02 PM   #14 (permalink)
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Originally posted by ROCKTACO
Looks good steve, where did you end up going with your battery?

Any way to narrow down the type of Volkswagon it came from? Or is it a pretty easy find?

Thanks
The battery is over on the passenger side inner fender where some people have their ABS block. luckily mine didn't come with ABS so i had a nice big opening.

The compressor was off of a corrado (I think) but it was mounted right in the front of the car. I did see one on a golf though. Look for the early 80's VW's most of the ones at PNP that had AC had yorks.

I'd imagine that you could fit a regular York, but I like this little one, i filled up all 4 tires today from 8PSI to 32PSI in 10 minutes. pretty good in my book.
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Old 09-17-2003, 11:03 PM   #15 (permalink)
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Hey Steve,
congrats on Varian Medical. I heard you got hired there from Dr. Singh. Hope all is well in the job world for you.

The on board air looks good.

KC


Thanks KC, I love it there, i've never had a job that i actually like going to work before. Plus i get to take stuff apart and put it back together, and every once in a while i get to make sparks!!!


Steve
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