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Forum: Heating & Cooling TECH Yesterday, 05:12 AM
Replies: 20
Views: 645
Posted By dataway
I love it! I have a dozen of those things...

I love it!
I have a dozen of those things lying around. Some with excellent heat sinks capable of dissipating over 100 watts. All of CPU or GPU cooling units.

Right now I'm building an electric...
Forum: THE LOBBY Yesterday, 05:04 AM
Replies: 132
Views: 11,414
Posted By dataway
Day Two ... Trusses going up ... ran out of...

Day Two ... Trusses going up ... ran out of battery towards the end. They worked till 7pm.

https://www.youtube.com/watch?v=yebqtzx6-Aw
Forum: THE LOBBY 09-18-2024, 05:05 AM
Replies: 132
Views: 11,414
Posted By dataway
5 minute time lapse of the first day of the shop...

5 minute time lapse of the first day of the shop building construction is posted at:

https://www.youtube.com/watch?v=W6zC-4Y27N0

So far, sorta so good. Had some difference in opinion with the...
Forum: THE LOBBY 09-18-2024, 05:02 AM
Replies: 16
Views: 691
Posted By dataway
Excellent input folks. I'm seeing performance...

Excellent input folks.
I'm seeing performance of the systems kind of all over the place no matter what type of system is used. Makes me wonder if some vehicles designs are more suited for AC than...
Forum: Heating & Cooling TECH 09-18-2024, 04:43 AM
Replies: 20
Views: 645
Posted By dataway
Silver, yep that looks like a decent setup....

Silver, yep that looks like a decent setup. Single larger fan worked well in simulation ... and I see it's got a more conventional fan design with plenty of room for air to pass between the blades at...
Forum: Pontiac - Street 09-17-2024, 04:45 AM
Replies: 6
Views: 188
Posted By dataway
Midnight, I print a LOT of stuff. To replicate...

Midnight,
I print a LOT of stuff. To replicate a metal part like that with 3D printing probably would not work. 3D printing is not good a producing thin section parts under that kind of localized...
Forum: Heating & Cooling TECH 09-16-2024, 04:30 AM
Replies: 20
Views: 645
Posted By dataway
For those that are still interested in this...

For those that are still interested in this tedious subject matter.

For myself, I have come to a conclusion.
By FAR the the biggest factor for the volume of air flow is just what you would think...
Forum: Heating & Cooling TECH 09-16-2024, 03:56 AM
Replies: 20
Views: 645
Posted By dataway
Envoy, Here is a back of the napkin simulation. ...

Envoy, Here is a back of the napkin simulation.

Total flow is 29,344 CFM, so yes an improvement over the other dual fan setups but not a big improvement. In this graphic the flow "pipes" color is...
Forum: Heating & Cooling TECH 09-16-2024, 01:40 AM
Replies: 20
Views: 645
Posted By dataway
Envoy ... do you know the diameter of the...

Envoy ... do you know the diameter of the fan/openings?

Looks like the shroud depth is about 2.5-3" ?

My guess is the shape of that shroud makes a big difference. I'll work up a study of that,...
Forum: Heating & Cooling TECH 09-15-2024, 04:33 AM
Replies: 20
Views: 645
Posted By dataway
Here is something very interesting. A dual...

Here is something very interesting.
A dual electric fan setup with a 2" deep shroud actually flows worse than the same setup with a 3/4" deep shroud.

The 2" deep shroud gives the air just...
Forum: Pontiac - Street 09-15-2024, 02:41 AM
Replies: 28
Views: 1,071
Posted By dataway
Not sure how much you can tell from the design of...

Not sure how much you can tell from the design of those two parts. Electronics changed a LOT over the years, components got smaller, doesn't mean they got worse. Circuit traces may get smaller...
Forum: Pontiac - Street 09-14-2024, 02:58 AM
Replies: 44
Views: 1,224
Posted By dataway
Can you post a picture of the radiator/fan setup?...

Can you post a picture of the radiator/fan setup?

Hopefully you are not using one of those dual electric fan setups with the shroud about 1" deep. They only use about half the radiator.
Forum: Heating & Cooling TECH 09-13-2024, 08:05 PM
Replies: 20
Views: 645
Posted By dataway
Ran the simulation a couple more times using a...

Ran the simulation a couple more times using a positive 1 psi over atmospheric pressure at the front of the radiator. Flow vectors were the same ... just faster.

Added some sensors to get volume...
Forum: Heating & Cooling TECH 09-13-2024, 06:39 PM
Replies: 20
Views: 645
Posted By dataway
AG, thanks for that info, I was just guessing at...

AG, thanks for that info, I was just guessing at what pressure in front of the radiator might be at highway speeds.

I'll bump up the pressure to about 1 psi above static and see what it looks...
Forum: Heating & Cooling TECH 09-13-2024, 06:31 AM
Replies: 20
Views: 645
Posted By dataway
OEM Fan flow vs Dual Electric Fan Flow

After reading a recent topic on engine overheating I thought I'd simulate the air flow through radiator and fan openings.

Case 1: OEM 19" fan opening and approximation of an OEM fan shroud. Shroud...
Forum: Heating & Cooling TECH 09-12-2024, 03:58 AM
Replies: 6
Views: 282
Posted By dataway
It's the curse of owning a 68. Yes, tons of...

It's the curse of owning a 68. Yes, tons of re-pop companies don't seem to grasp all the 1968 ONLY parts.
The dash had major changes from 68 to 69, very few things from a 69 dash will fit a 68. Even...
Forum: Heating & Cooling TECH 09-10-2024, 04:37 AM
Replies: 6
Views: 282
Posted By dataway
Come on PY'ers ... don't make me take the cover...

Come on PY'ers ... don't make me take the cover off my car and crawl under the dash and take pictures :)
Forum: Heating & Cooling TECH 09-09-2024, 04:43 AM
Replies: 6
Views: 282
Posted By dataway
I wonder if there are different part numbers for...

I wonder if there are different part numbers for options like tilt wheel, column shift etc. ?

The piece on the right in the photo looks familiar (I have a 68 with AC, auto trans) the one on the...
Forum: 70-72 GTO Tempest & LeMans TECH 09-07-2024, 01:27 AM
Replies: 2
Views: 303
Posted By dataway
I used the SPI also and loved it.

I used the SPI also and loved it.
Forum: Heating & Cooling TECH 09-07-2024, 01:23 AM
Replies: 46
Views: 1,425
Posted By dataway
Excellent info, thank you sir. I have a 68...

Excellent info, thank you sir.

I have a 68 GM AC service manual here somewhere (supplement to the 68 service manual) Never looked through it very well, assume it has some good info.
Forum: Heating & Cooling TECH 09-06-2024, 03:07 AM
Replies: 27
Views: 855
Posted By dataway
The factories made the shrouds a large "funnel"...

The factories made the shrouds a large "funnel" shape for a reason, and they kept the fan a considerable distance from the radiator for a reason. Air does not like to turn sharp corners.
And at...
Forum: THE LOBBY 09-06-2024, 02:31 AM
Replies: 29
Views: 1,094
Posted By dataway
Longs, I used a sort of similar setup on some of...

Longs, I used a sort of similar setup on some of my bending equipment. I bolted 3/8" plates to the concrete floor and then the equipment bolted to the plates. I could unbolt the equipment, move it...
Forum: Heating & Cooling TECH 09-06-2024, 02:25 AM
Replies: 46
Views: 1,425
Posted By dataway
burd, no, a PY member has set me up with a supply...

burd, no, a PY member has set me up with a supply of R12, appreciate the offer.
Forum: Heating & Cooling TECH 09-05-2024, 02:37 AM
Replies: 46
Views: 1,425
Posted By dataway
While I'm at it ... has anyone here "rebuilt" an...

While I'm at it ... has anyone here "rebuilt" an A6 ? I put that in quotes because I'm not sure what it means on an A6? Just seals? Are there other wear parts? Do the pistons/cylinders wear out? The...
Forum: THE LOBBY 09-05-2024, 02:31 AM
Replies: 29
Views: 1,094
Posted By dataway
Yep I was going to opt for the 3/4 threaded rod...

Yep I was going to opt for the 3/4 threaded rod and epoxy too. In my last shop I had a Hossfeld Bender bolted to the floor (solid 4" slab) with expanding type anchors. The Hossfeld has an extension...
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