If it helps your search efforts you can use a C/K-30 big block application with a 4.56 gear option for the heavy pitch 7-blade fan - doesn’t need to be just a diesel application.
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CK5
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Wes's Burb build/update/maintance
- Thread starter Wes Harden
- Start date
- Joined
- Mar 3, 2000
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- 9,123
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I have been using a flex a lite fan in mine since about 2007, that and the 4 core radiator.
Victim of shitty new parts
.
Last Sept on way home from UnBlazer Bash my Hayden extreme duty fan clutch gave up. Maybe 4 years old tops.
Grabbed a Duralast for expedience. Worked adequately during the winter. Not so much this spring with ac on.
Ordered amother Hayden 2797
Install. No change. Try a different fan,this time factory 5 blade. No change. 5 blade fan duralast clutch no change.
I am going nuts, thinking the big tires changed my rpm enough that I need a high flow water pump. Better electric condenser fan, 7 blade fan, idk what.
Well I spent $$ on a 12" Derale high out put pusher electric, and I got a OER 7 blade repop fan. Alreadyvhad a 6 blade Derale 19" fan.
OER seem to be 19.25" and @ 1/4" more pitch than the Derale. Original 5 blade is 2 9/16".
How I measured
So I put new 7 blade on newest Hayden clutch. Check rad and condenser for debris blockages, all good, but blow the dust out for good measure.
All back together test time.
On choke the fan holds a red rag to grill.
Off choke @900 rpm not so much.
Temp guage gets up to 1/4 where it runs normal. So far so good. Turn on max ac,temp starts climbing just like before.
I am standing over rad with my hand in air stream no force at all. Guage is up to half still no clutch engagement. Over half up to 5/8ths this is well over 215° at tstat, rad is to hot to touch.
Hayden clutch never engaged.
Dig out an old dirty oem clutch from my pile, swap it out. Truck is still hot. Fire it up turn max ac on, sitting at 1/4 on the guage just where I like it.
Sitting in cab typing this with max ac, actually getting chilly. We have some over xast and scattered T storms today. Not really a warm Havasu day shop thermometer is at 75.
So when someone here says they got a new whatever that dont mean shit. I had 2 new different brands and both were crap. Both being returned,and nasty reviews puplished.
.Last Sept on way home from UnBlazer Bash my Hayden extreme duty fan clutch gave up. Maybe 4 years old tops.
Grabbed a Duralast for expedience. Worked adequately during the winter. Not so much this spring with ac on.
Ordered amother Hayden 2797
Install. No change. Try a different fan,this time factory 5 blade. No change. 5 blade fan duralast clutch no change.
I am going nuts, thinking the big tires changed my rpm enough that I need a high flow water pump. Better electric condenser fan, 7 blade fan, idk what.
Well I spent $$ on a 12" Derale high out put pusher electric, and I got a OER 7 blade repop fan. Alreadyvhad a 6 blade Derale 19" fan.
OER seem to be 19.25" and @ 1/4" more pitch than the Derale. Original 5 blade is 2 9/16".
How I measured
So I put new 7 blade on newest Hayden clutch. Check rad and condenser for debris blockages, all good, but blow the dust out for good measure.
All back together test time.
On choke the fan holds a red rag to grill.
Off choke @900 rpm not so much.
Temp guage gets up to 1/4 where it runs normal. So far so good. Turn on max ac,temp starts climbing just like before.
I am standing over rad with my hand in air stream no force at all. Guage is up to half still no clutch engagement. Over half up to 5/8ths this is well over 215° at tstat, rad is to hot to touch.
Hayden clutch never engaged.
Dig out an old dirty oem clutch from my pile, swap it out. Truck is still hot. Fire it up turn max ac on, sitting at 1/4 on the guage just where I like it.
Sitting in cab typing this with max ac, actually getting chilly. We have some over xast and scattered T storms today. Not really a warm Havasu day shop thermometer is at 75.
So when someone here says they got a new whatever that dont mean shit. I had 2 new different brands and both were crap. Both being returned,and nasty reviews puplished.
Yep. New parts plain suckVictim of shitty new parts
Last Sept on way home from UnBlazer Bash my Hayden extreme duty fan clutch gave up. Maybe 4 years old tops.
Grabbed a Duralast for expedience. Worked adequately during the winter. Not so much this spring with ac on.
Ordered amother Hayden 2797
Install. No change. Try a different fan,this time factory 5 blade. No change. 5 blade fan duralast clutch no change.
I am going nuts, thinking the big tires changed my rpm enough that I need a high flow water pump. Better electric condenser fan, 7 blade fan, idk what.
Well I spent $$ on a 12" Derale high out put pusher electric, and I got a OER 7 blade repop fan. Alreadyvhad a 6 blade Derale 19" fan.
OER seem to be 19.25" and @ 1/4" more pitch than the Derale. Original 5 blade is 2 9/16".
How I measured
View attachment 503639View attachment 503640
So I put new 7 blade on newest Hayden clutch. Check rad and condenser for debris blockages, all good, but blow the dust out for good measure.
All back together test time.
On choke the fan holds a red rag to grill.
View attachment 503646
Off choke @900 rpm not so much.
Temp guage gets up to 1/4 where it runs normal. So far so good. Turn on max ac,temp starts climbing just like before.
I am standing over rad with my hand in air stream no force at all. Guage is up to half still no clutch engagement. Over half up to 5/8ths this is well over 215° at tstat, rad is to hot to touch.
Hayden clutch never engaged.
Dig out an old dirty oem clutch from my pile, swap it out. Truck is still hot. Fire it up turn max ac on, sitting at 1/4 on the guage just where I like it.
Sitting in cab typing this with max ac, actually getting chilly. We have some over xast and scattered T storms today. Not really a warm Havasu day shop thermometer is at 75.
So when someone here says they got a new whatever that dont mean shit. I had 2 new different brands and both were crap. Both being returned,and nasty reviews puplished.
Anymore I figure if an old part is still working, I'm not going to replace it just for the sake of a new part. In the past I would do that figuring I'd have a more reliable part with it being new. Now I figure it's just as much of a crap shoot.
The current clutch is a Gm part,I can not name it's history ir which truck it is from.
I did try a thrid clutch,a non thermal from my pile,it was nfg as well.
Yeah thinking the parts situation is only gonba get worse. Going full hoader now.
I did try a thrid clutch,a non thermal from my pile,it was nfg as well.
Yeah thinking the parts situation is only gonba get worse. Going full hoader now.
Check my avatar
Yeah you have me beat, I had been actively avoiding collecting, for lack of room. land in Yucca is cheap, and containers aren't to expensive either.............. slippery slope
Been thinking about my fan clutch failure owh from not BB24, quite a bit. I have come to the assumption that flexing allowed the fan to hit the shroud and damage the clutch.
I was gonna just carry an extra clutch for this year, but last year the clutch failure also caused my ac clutch coil to melt, going to add a thermal limiter to the circuit anyway.
This morning I ordered Winstar fan set up and some of the wiring I'll need to se it up.
I was gonna just carry an extra clutch for this year, but last year the clutch failure also caused my ac clutch coil to melt, going to add a thermal limiter to the circuit anyway.
This morning I ordered Winstar fan set up and some of the wiring I'll need to se it up.
The windstar fans became very famous because too many people had your problem when flexing on a trail, plus they do flow a lot more ait when on the trail than a mechanical fan.
It's like how people switch to hydraulic clutch to avoid the problems while flexing
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I was using an edel carb, so probably no help there, however I never had issues with the carb at any speed or load range, but i eventually went with sniper efi.
after adding an electric fuel pump the same q jet has been running well, for several 10s of thousands of miles. I have been "adjusting" jets and needles a bit lately purely for experimentation. Will probably go back to original with softer power piston spring.
Time for BB25 prep trash.
First up is relocate the front axle. Have ORD off set shim.
Guess I am doing an inch.
Also the new ORD upper shock mounts since Im in the area.
First up is relocate the front axle. Have ORD off set shim.
Guess I am doing an inch.
Also the new ORD upper shock mounts since Im in the area.
Your fenders will thank you
Got some burb time yesterday little more today.
Off set plates done ORD shock mounts going in.
Looks like I'll need the ORD F3 shock, current have 24 3/8"
Off set plates done ORD shock mounts going in.
Looks like I'll need the ORD F3 shock, current have 24 3/8"
I did have to order shocks the old ones were @ 1" short at full droop. 
drilled an 11/16" hole to compensate for axle movement.
drilled an 11/16" hole to compensate for axle movement.
How does that front driveshaft feel about the droop?
Doesn't look too happy
it's now connected no splines showing. At ride height there was 3/4" slip showing, wanted a little more so move axle forward.
Yes but it will not droop on it's own to match the yoke, I think you cv is maxed out
