![]() |
![]() |
#326 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
|
Re: 41DegreesSouth Build Thread
I can't remember, was there any particular reason you went with electric fans over a mechanical with a clutch and a shroud? One way to test the air trapping issue in that hose would be this. Build a pipe out of steel with the ends and use a hose on either end to hook to the engine and radiator. Put a drain valve in the top of the highest point of the pipe. Crack the drain after filling it and see if air comes out. I know it wil be more work and a pain now that the truck is driving. I've had air get trapped in some builds and it can be a pain actually figuring out why it was there and why it wouldn't work it's way out.
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
![]() |
![]() |
![]() |
#327 |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
|
Re: 41DegreesSouth Build Thread
I use an old trick that my father-in-law showed me, I drill a small 1/8" hole in the thermostat, then when you are filling the radiator/block with water/anti-freeze, the air will come out of the block, seems to work, I drill every thermostat I install....
|
![]() |
![]() |
![]() |
#328 | ||
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Quote:
![]() Quote:
I talked to the local engine rebuilder yesterday. He wondered about the shroud being restrictive. One easy check is remove the electric fan shroud, chuck on a stock fan, and see what happens. A relatively easy check so I'll start there. If I can find the original fan I took off nine years ago! I also want to do a block flush as well. Anyone done a rust/scale flush before? What chemical did you use?
__________________
1972 K2500 Long Box 400/350 |
||
![]() |
![]() |
![]() |
#329 |
Registered User
Join Date: Mar 2009
Location: rotorua/new zealand
Posts: 161
|
Re: 41DegreesSouth Build Thread
haven't been on here for awhile an just caught up with your progress. looks most excellent and congratulations on your first big trip. good luck with the fan problem - I used a stock fan and shroud and have never had any issues. we were down your way last weekend for the cruise martinbourough deal an also went to the wheels with attitude car show at dannevirke.
keep up the good work mark
__________________
1969 stepside-305/4spd/12 bolt posi http://67-72chevytrucks.com/vboard/s...d.php?t=477157 1968 pontiac lemans convertible-350/pwrglde/10 bolt 1934 oldsmobile sedan-350/350/12 bolt posi 1930 model a pickup-350/350/jag ind 1928 model a roadster-283/350/9" |
![]() |
![]() |
![]() |
#330 |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Thanks Mark! Certainly nice to be driving it after all this time! I didn't make it down to Cruise Martinborough. Not sure a redneck in a 4X4 was their target vehicle
![]() Meanwhile, at OCD Engineering, I wanted to do something about these fans/surging motor temps. Couldn't find the original fan so swaping back to that wasn't an option. Ended up ringing SPAL to discuss my set up. Biased or not, they said for my vehicle/motor combo they would recommend a minimum 3000cfm, and the two 12's that I had were topped out round 2200cfm. They do a 13 1/2" fan with a increased blade pitch and uprated motor that would give me around 4500cfm for the pair. Much as I wasn't spending any more money (!) I bought a pair of motors/fans and shipped them down. Time was of the essence because I had another trip planned. I wanted to open it up as much as possible so drew up a sguare to round shroud pattern, and had it laser cut. Laser is so cool, they even etched the fold lines for me! Not up to CO standards but ok for my first square/round attempt. Top and bottom sloped 5mm 'back', sides vertical, and fan center is slightly left/right of opening center because combined blade diameter is more than radiator width (pic 4-5).
__________________
1972 K2500 Long Box 400/350 |
![]() |
![]() |
![]() |
#331 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
|
Re: 41DegreesSouth Build Thread
That is just plane ole Awesome!
__________________
Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
![]() |
![]() |
![]() |
#332 |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Thanks Swamp!
Yes, I should have TIGed it! But like I said, time was against me, and it took long enough anyways! So I went from two 12" diameter holes, to a 14" X 28" opening, with the fans further back from the radiator face, and potentially doubled fan capacity. It seems to have taken at least 15* out of the running temps. We left for another 600 mile trip the day after I got them installed, and the hottest I saw was around 195*-200*. Still haven't had a load/trailer on, but I'm heading in the right direction. There is a space below the fans about 3 1/2" X 28" that i could open up and put rubber flaps on so that would be the final step I guess. I still need to 'finish' the shroud anyway, I just rattle canned the top face and chucked it in! Still need to tidy up the welds and paint it properly... Apparently I didn't take any shot's of the fans installed before I put it in the truck. Sorry for the rubbish shots.
__________________
1972 K2500 Long Box 400/350 |
![]() |
![]() |
![]() |
#333 |
Chevy Enthusiast
Join Date: Jul 2009
Location: Canyon Lake Texas
Posts: 2,024
|
Re: 41DegreesSouth Build Thread
Awesome, THAT is how you build a fan shroud! Great work!
How far are the fans sticking out or the shroud? You could try shimming them out so they're half in/ half out and just to see if that helps any.
__________________
Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress) |
![]() |
![]() |
![]() |
#334 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,929
|
Re: 41DegreesSouth Build Thread
Please put your tray in the upright position, buckle up and prepare for take off!
![]() ![]()
__________________
Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
![]() |
![]() |
![]() |
#335 | |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Quote:
! Should do the trick huh?!
__________________
1972 K2500 Long Box 400/350 |
|
![]() |
![]() |
![]() |
#336 |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Following on with the OCD theme.... I haven't posted any pictures of another little project that sucked far to much time as I was trying to get the truck going in December.
I wanted a sun visor shelf, but hadn't seen anything like I wanted commercially available. So me and Princess made a hardboard pattern, transferred it to sheet steel, then made final tweaks to the pattern. We then cut a final copy. I ended up using 3/64" plate in case anyone's head ends up making contact with it, but I think 1/16" would be better. Either way I put a small brace in the middle and it's more than stable/strong enough. Got some Heep sun visors that mounted on a 'flat' plane (but still need further mods!) Had a friend come and glue some vinyl onto it and I'm really happy with how it came out. It's pop riveted on around the top of the window frame, just inside the window rubber, a small bracket left and right side, and the already mentioned middle brace.
__________________
1972 K2500 Long Box 400/350 |
![]() |
![]() |
![]() |
#337 |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
It's tucked up nice and high, level with the top edge of the window frame/door opening. Bit of extra storage space, and provision for gauges as well. On that front I had drilled a small hole top and bottom of the A pillar to make it easier to run wires. I hacked up a 'custom' gauge cluster (did you know that 2" medium NB pipe has just the right ID for gauges?!) that hold a clock and my O2 sensor gauge.
__________________
1972 K2500 Long Box 400/350 |
![]() |
![]() |
![]() |
#338 |
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Looks the part huh? Overall I'm pretty happy. It's out of the way, I didn't want gauges under the dash, and the sunglasses and wallet etc are easy to grab.
Scratch that twitch!!
__________________
1972 K2500 Long Box 400/350 Last edited by Billhilly; 03-19-2016 at 05:15 AM. |
![]() |
![]() |
![]() |
#339 |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,929
|
Re: 41DegreesSouth Build Thread
We had a 73 GMC motorhome that had a overhead shelf just like that very handy! Very impressive build sir glad to see some bugs on the windshield.
__________________
Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
![]() |
![]() |
![]() |
#340 |
6>8 Plugless........
![]() Join Date: Sep 2007
Location: Prairie City, Ia
Posts: 17,140
|
Re: 41DegreesSouth Build Thread
I personally think your shroud turned out awesome! I have people tell me all the time that a fan should be half in/half out of a shroud or the fan won't pull air correctly. Some semi's have the fan buried in the shroud and they cool great. On my wife's excursion it's like that and it's never even thought of getting to the top of normal let a lone hot. Either way, it definitely sounds like you're making good progress as your temps did drop. That head liner visor is nice! I had one in a 89 F250 but the design was crap. I can't remember who produced it, but it had to have stiffeners installed to keep it from vibrating it's self off the roof.
![]()
__________________
Ryan 1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread 1972 GMC Sierra Grande Longhorn 4x4 1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed 1972 C10 Suburban Custom Deluxe 1969 Chevy milk truck 1971 Camaro RS 5.3 BTR STG3 Cam Super T10 1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project Tired of spark plugs? Check this out. |
![]() |
![]() |
![]() |
#341 | ||
Registered User
Join Date: May 2001
Location: Wairarapa, New Zealand.
Posts: 782
|
Re: 41DegreesSouth Build Thread
Quote:
Quote:
A lot of time into that shelf, I told Princess we were going to sell them to the Ameerrican's!
__________________
1972 K2500 Long Box 400/350 |
||
![]() |
![]() |
![]() |
#342 | |
Registered User
Join Date: May 2011
Location: Syracuse, Utah
Posts: 1,929
|
Re: 41DegreesSouth Build Thread
Quote:
![]()
__________________
Brett ![]() 67 Camaro SS Build:http://67-72chevytrucks.com/vboard/s...d.php?t=751594 72 Cheyenne/10 Super 115" Fleetside (Waiting it's turn.) 72 Cheyenne/K30 Super 133" DRW SOLD Build:http://67-72chevytrucks.com/vboard/s...d.php?t=645614 YouTube: https://www.youtube.com/@6dee7-7dee2 |
|
![]() |
![]() |
![]() |
Bookmarks |
|
|