External oil cooler vs internal rad one....

[GM Guy]

would be concerned about mpgs if I was shopping for a d-max fan, but with the kennedy clutch, apparently kenny isnt. It does sound like he is kinda getting the ol girls lined out. hopefully they will behave. I just couldnt stand to know kenny got a damn ford automatic.

 

[Acesneights1]

If only they made an Excursion with a handshaker....
The fans that handgrenaded that I referred to were Flex fans made by flexolite. They are fiberglass IIRC or some variation of it. Pretty ugly when one comes apart but the material used for the Dmax fan is much stronger although I supposed the possiblity still exists but heck even a steel one could come apart. Nope, I just have two trucks sitting side by side right now, one with Dmax fan and one with 9 blade steel and the steel sounds like it pulls more air. I literally got out of one and into the other and can hear the difference. I'm certain of it. I have the black Dmax fan(9 or 10 blade, forgot to count it). Thought I posted a pic somewhere in this thread. I look back and see. I had the same result with the HEATH Dmax fan vs the factory 9 blade. All I know is when that Hayden kicked in with the steel fan the temp dropped FAST in my 93 but I was NOT towing. I can't tow with that truck so I'll never know what effects towing would have on it.

Gonna make that restrictor today me thnks. Depends if the Shop up the street is open as I need to borrow a big NPT tap.

 

[handcannon]

Gonna make that restrictor today me thnks. Depends if the Shop up the street is open as I need to borrow a big NPT tap.

I figured you'd make your own. Be interesting to see what difference, if any, it makes for you. Is it going into the 93? I had no way of knowing what did what as I did the balanced flow pump, the Heath fan clutch, and the restrictor all at the same time.

Don

 

[Acesneights1]

Nope going on the 98. The 93 has single therm setup, restrictor not needed. Just finished. Lots of pics to post later. Going for a test drive now to Cabelas to dump the camper(gittin ripe...:sick: ). Getting nice and hot out. Good day for a test drive...

 

[buddy]

I think its too hard to really compare from one truck to another with different configurations and scenarios. Got to put both fans on the same truck. It would be interesting to see what idle temps are like on the 93 with the DMax fan. I realize its not as hot here, but even when its in the 90s I still have a hard time getting mine even up to tstat temp, and it definately wont from just idling. It sits around 170F at idle, even with 195 t-stat.

 

[Acesneights1]

Well here are some pics from the restrictor. fast forward, working on the 98 Burb with dual stats. Pretty easy fab. I do notice a difference. I only broke 210 once and I know why. I was climbing the hill by my house and the truck hit 210 and the Kennedy fan kicked in but I leveled off and turned onto my street and it was down hill with 30 mph speed limit so basically the trucks temp peaked out as I made the turn then the engine did not have the rpms . I dropped it into second gear and the temp came down very quick. So far the Kennedy fan does exactly what it is advertised to do. A few notes on it. It does not just come on and off like others. It partially engages while climbing in temps and fully locks by 210. It takes a little lnger to disengage but not bad. I would NOT use 195 stats with this fan. With 180 stats it works properly but if you run 195's I could see it running alot. I am happy with it so far and to date have had the best results with it vs Heaths or the Hayden SD, but again I would NOT use it with 195's. It was really hot again today and I took it for a good half to Cabelas up some decent hills and she never went over 210 basically and definitely notice a difference with the restrictor. IMHO if you are running dual stats, it's a must do. It was upper 90s and humid outside.

Here;s the Dmax fan with the JK clutch. Even got a free pen, how can you beat that ??
:rof:

 

[Acesneights1]

Now here is the homemade restrictor. I didn't go all the way in with the tap as it felt real tight where i stopped. I wasn't sure whether to put the restrictor at the WP or the them housing but then I thought about it and on a single setup it's blocked by the them housing and it I blocked it by the WP that would put alot more pressue on the bypass hose. On a side note I would like to find the scumbag that invented those stupid ****in squeeze clamps and put 6 of them on his f'in balls. I had to cut them off with a wizzer.
Note when refilling the rad on a 94+ with the pressurized plastic tank, it's much better to fill the rad a much as possible with an old cutoff rad hose through the upper hose inlet. This cuts down on air pockets vs filling it through the plastic bottle. Also I took a paint strainer and put it in a funnel and screened all the antifreeze. Look at all the crap in it.

 

[handcannon]

I put my restrictor on the pump because I was concerned about the alum crossover. The ears where it bolts down to the heads are weak and I didn't want to risk breaking them while trying to get the hose barb out. The origional single therm that was on this motor was broken when I got the truck. The accident had pushed the rad core support back a little bit. The only thing that could have put pressure on the crossover was the upper rad hose, and the crossover was broken.

So far no problems with the bypass hose, but it was new when I put the dual crossover on.

Now we just need some long term results with this setup since the initial results seem to be good.

Don

 

[buddy]

Thanks for all of the pics. Those tires are sticking out quite a bit there, some offset wheels or spacers? Wider wheelbase help?

Can you snap a picture of your stock clutch that you modded?

 

[Acesneights1]

Thanks for all of the pics. Those tires are sticking out quite a bit there, some offset wheels or spacers? Wider wheelbase help?

Can you snap a picture of your stock clutch that you modded?

AFAIK the wheels are not offset but they came with the truck. ARE wheels I think. The clutch...hhmmmmmm...Gotta go rescue it from the trash...Oops. I can find it. Recycle bin didn't go out yet.

:rof:..I know what your thinking...I drew the spring backwards in the picture I made explaining what i did so maybe I put the spring in backwards...I thought of that too....
2nd pic is with the snot I put on, 1st pic is with the snot removed so you can see the tail.

 

[Acesneights1]

These are of the 93, you can see why I don't plan on towing with it...

 

[bk95td]

Why shouldn't you be able to tow with big tires? I see lifted trucks towing all the time. It does look funny that they have to have a 12 inch drop ball mount.

 

[Brooklyn Tow]

The 93 Looks Tight.....Nice stance!

 

[GM Guy]

would be a little less top heavy on 245/75R16s and stock suspension. make it safe, take it back to stock! put a couch in back for more than one occupant, and tow the travel trailer with it!

 

[Acesneights1]

Yeah it's way to high to tow a camper safely. It would be doing the ass end shuffle for sure if I could even get a hitch to drop low enough. I'd tow my skidsteer trailer locally with it or a small Enclosed trailer to Trailrex maybe but that's it. It's not worth dropping it down. If I get tired of it, I'll sell it. for now I think it will be my new firewood truck while I rebuild my poor tired CUCV. It worked hard last winter so I gave it the summer off...
Did I mention it is fun to drive...I tinted the windows so people can't see a pathetic old man driving something like that...rof:
It does turn heads...Just don't see many GMT400's lifted around here. Mostly Dodges and Fords. GM's just cost too much to lift since the IFS came about. It does ride and drive nice though. Best running truck in the fleet. I'll probably sell it in the fall when the CUCV is back together. Don't need two RC pickups and I will never sell the CUCV.. It is funny to pull into work (I work in the engineering dept, no I am not one) and see the dirty looks I get from all the pc correct libtards that work there with thier bicycles and hybrids as my old rag belches out some black love....:rof:

 

[orrum]

Glad u got er done Ace!!!! I been towing with my truck and you r right there is something about 210 degrees. Had a load of cattle, 6 head about 5000 lbs plus 4500 lbs for the trailer, to haul about 100 miles to their new owner yesterday and as long as I run 2500 rpms or less I can tow great! If I try to put my foot in it and run 70-75 it climbs to 210 and scares me @ that so I just back off. What upsets me is I have lots of gas pedal left and could do 70 easy if the engine could take the fuel. I do need to clean the condenser out with scrubbing bubbles yet. If I go into the mountains and have to drop her into third and barrel up a long climb I am not sure how it will do. I have never seen a truck that responds so fast and predictably to increased throttle and rpms with increased temp. I was towing all that weight at 60 mph and it was @ 165! Just cant get after it.

 

[Acesneights1]

Well, did my first real tow this weekend with the Burb and my Kennedy Clutch and Dmax fan. The JK clutch is a waste of money as it does exactly what all the others do. It picks and chooses when it feels like engaging but after owning and towing with enough of these in different configurations, the constant I see between them all is that it seems when the temps go up to about 210 and your in 4th gear and not revvin the motor, the clutch comes in as it should but if the clutch is not engaged and you drop the tranny into 3rd and the rpms are way up the damn thing with hit 235 before the clutch kicks in. The Haydens all did it and so does the JK clutch so his claims about early engagemnet are not true at all. The clutch did not give full engagement until 210 and in some cases at high rpms not until 235. Now once it finally got off it's ass and locked up the temps came down quick and stayed down as long as that fan was locked up which leads me to believe that a more reliable way of controlling the fan clutch is needed. I'm no engineer but it seems to me the only explanation I can come up with is at high rpms maybe the fan clutch is actually deflecting the heat from the bimetallic strip ?? It was very consistent, High rpms...late engagement. Low rpms and high temp, good engagement. A Hayden SD will do the same thing and it's 100$ cheaper than JK's clutch. Oh well, nuther lesson learned. Hopefully I'll get the Humvee thing to work because I really believe that is the final solution. Also I am running a stock tune and I could still hit 1300 egt if I pushed the truck real hard but seemed to stay at 11-1200 pulling the hills hard. No tune and no TM on this truck. it runs fine the way it is and the vac wastegate system worked as it was supposed to. Boost was lower than a TM but I didn't see any drop offs until it hit 10 and the system would drop it to about 7psi. The truck pulled fine and in fact passed a few people. Now I wish I had waited before yanking that copper rad out until I got the JK clutch on. I wonder if the heat off the copper would have engaged the clutch more efficiently...? I still have a 3 core copper one I could try. I'm gonna wait for the Humvee setup. I got a lathe to play with now so....