| Author |
Message |
Ray Lala (Rayshound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 05, 2005 - 9:00 pm: | |
I have installed a s-60 in my mci-8. I have the belt driven 24v 50n off of my old 8v71. I can change pulleys. It now has 4 (A) belt pulley. My ddec 3 has the serpintine system It is about 1-3/4" wide. It drives the air fan hub also a secondary smaller serpintine off of the hub drives the a/c comp. for the dash air. I also have a front pto with two (b) belts that drives the alt only. I had put a large 12v alt. on this. Two (b) belts. It is a leaseneedville with a three stage regulator. It was off of an airport shuttle bus it is not as large as the 50 n 24v alt but it is big. Would the 2 (b) belt pto handle two lagge alts or should I put the 50n on the 1-3/4 serpintine. If I do this if the alt dies I loose the fan. Also would the 50n take the side pull of the serpintine slack adjuster. ? Thanks Ray |
jimmci9 #2
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 05, 2005 - 9:48 pm: | |
the serpentine belt will drive the 50dn alternator... if you could see 1 of the newer mci's with the series 60 in it, you'd see that it drives a very similar alternator....the front pto, with the 2 groove pulley is good for about 12hp, if memory serves me...are you still going with a hydraulic fan???... |
Ray Lala (Rayshound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 05, 2005 - 10:32 pm: | |
Thanks Jim, no I desided with lots of advice to not go hydraulic. I bolted the fan clutch back on the engine along with shroud & blades and put the radiator on the back like I wanted in the first place. I understand that Jerry Russel has had no problems with his. I have seen some big stick & glue diesel pushers with rear radiators & fan. The air clutch is hooked to the ddec3 on pwm 1. I will use the spare pwm 2 to drive a relay to pick up two aux electric fans to suplement the 31" 9 blade fan. Ray |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 05, 2005 - 11:01 pm: | |
just curious ......are you going to pull air in...or push it out ?? |
Ray Lala (Rayshound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, March 05, 2005 - 11:57 pm: | |
Two Dogs, I was planning on sucking it in just as in the truck. I could use some advice. I have heard of the opposite way but have not talked to anyone about this. Ray |
jimmci9 #2
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 6:53 am: | |
i think that you'll find a negative pressure on the back skin of the bus...but i'd recommend keeping the suction fan... that way it will clear out the engine compartment of residual heat... the fans are directional.. you just can't change rotation....where are you mounting your charge-air cooler??? in front of the radiator, like it was in the truck???... with the new radiator you've got, and the low-flow cooling of a series 60, a thermostatic fan, it should be ok....some engineer somewhere has already designed it....wish i still has acess to the dealership films that showed the little pieces of yarn taped to the grill and hood of a truck.... they showed airflow and negative, positive pressure places...now that was amazing....is there a temp sender to detect air inlet (from the charge air cooler) temperature???... that might be the only problem.... |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 7:52 am: | |
Ray...have no idea...just seems like if there is a negative pressure at the back of the bus AND you want to push hot air OUT of your engine compartment...guess I'm wrong ,but seems like you could turn the fan blade around...I have no experience in this....just thinking |
Ray Lala (Rayshound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 9:29 am: | |
Thanks Jim & Two Dogs, Yes the air charge cooler is in front of the radiator like in the truck. I have been behind large stick & glue diesel pushers and some have the rear radiator. Looking at Jerry Russels website, he has exact setup & I understand he has no heating problems although I've never had a chance to talk with him. I do believe the two electric fans Jerry has over his radiator is a good idea to suplement the belt fan incase it needs it. The ddec3 has a second fan option you can turn on in it's database and the engine computer will request it at a specified temp. Three different problems made me decide on this rear fan setup. (1) The hydraulic fan choice, or the angle gear box & belts. (2) a high dollar s/s louver to match the side skin of the bus.(3) problems locating the muffler, (I want to keep it where it is) at and the side radiator setup would be in the way and I don't like stacks out of the roof. Ray |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 9:32 am: | |
ray...are you useing the s-60 radiator...what are the dimentions of the airflow part ? |
Craig (Ceieio)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 10:48 am: | |
Even though there is going to be a low pressure area at the back of the bus I think you are right to try to pull the air in through the radiator. The whole idea is to transfer heat from the hot water into the air, and the cooler the air is the better transfer will be.
Pushing hot air from the engine compartment out across the radiator, seems to me, will not cool as well.
My two cents and probably an overcharge at that! |
Ray Lala (Rayshound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 2:07 pm: | |
Two dogs, I believe the radiator demensions are as follows, 45" wide by 34" tall. I also have the fan shroud that covers the entire radiator and on the other end has about 1" clearance from the shroud to the fan tips. The fan is 9 blade 31" in dia. With air cluch on the fan controlled by air & a sol. valve. Ray |