On mine I had to position the motor hub between the pulley bolts or I would've only had about 1/4" clearance.
CaCOLLO how bout email the guy and tell him some more folks are interested and get him to post some dimensions. I got a 3" spacer off my pump and then about 1" to the radiator so about a 4" total to get it in there. Also does it come with a thermostat to kick it on? 11 amps is a pretty good draw on a car with A/C with our little 60 amp alternators. I'm gonna go to an 100 amp alternator anyway one of these days.
I can post a pic, and get you the dimensions myself. I will do it tomorrow when it gets light out, and a little bit warmer [brrr....]. For my car, i didn't really notice a lack of power from the stock alternator. Last night i drove with the wipers on, the headlights, my radio, and of course, the fan, and was just fine. I think if i added an electric fuel pump and all that i would need to go bigger, but it is fine for now. It doesn't come with a thermostat, but i picked an adjustable one up from Autozone for $15. I definitely have more room than you, bmcdaniel... By the way, i've seen 3,000 cfm fans in summit and other race magazines running over $100...so $45 plus $15 for a thermostat is a great deal!
I mounted mine on the front of the radiator. Keeps the engine compartment looking clean. Only had to modify one bracket.
That looks good in front of the radiator, too! Mine is 3.5" deep. Gives me about an inch between the waterpump and the fan. Here's pictures.... Edit: Notice the mounting too...the mounts come right out to where the shroud would normally bolt on. There's no holes, so you have to make four. The main reason i stuck mine on the back is that i have a stock radiator (no fancy aluminum) and fans are supposed to work better as pullers. If i had an aluminum i'm sure pushing would work just as well.
The front mount was purely a cosmetic choice for me. I have also heard that they work better as pullers but I havent ever read anything that actually tested this theroy. I dont have any heating problems with this set up.
The blades are straight on mine. On a side note, i've been worried about the upcoming summer with the fan, but today i took the car up a long windy road in the mountains and it never got above 190 (stays at 185 usually)--i think it will do just fine in the summer heat.
BEWARE because even similar looking fans are not alike in airflow, and that is what matters. There are dozens of electric fan styles out there. I'm runing a Flex-a-lite Black Magic Universial, and while expensive, it has worked great for over 5 years now. Its because the fan makes the air turbulaent, then it has to straighten to go through the fins. When it pulls, the air is fairly laminar and it is easier to pull more through as a result. What works works though. Maybe you can fit a bigger/better fan up front to compensate, or maybe you have extra radiator capacity, etc.
I'm no engineer so no argument here, but if this is true, then the grill, bumpers, and anything else in front, will also make the air turbulent. Then one could say the fan straightens out the turbulent air and pushes it straight through the radiator. The mind of the ignorant at work here.
I see what charlie is saying here... Think of it this way. Take a piece of PVC tubing, and mimic turbulent air by moving the PVC around in the air while trying to blow through it. If you're lucky you'll get about 25% of the air you blow straightened out and through the tube. Now suck on one end of the tube and wave the other end around in the air....you might be drawing turbulent air, but you've gotten 100% of the air you can suck through the tube. The radiator might not have a tube, but it's got a million little fins that air has to go through to cool the radiator. What charlie also said, and what i was trying to say earlier, is that if you've got a nice aluminum radiator, and a really high-CFM fan, it doesn't really matter!
pushing air through a coil of any kind creates a higher static pressure than drawing air through the coil..the air moves more smoothly and transfers and dissipates heat more rapidly when it is pulled rather than pushed. Charlie hit the nail on the head. S-blades have more surface area in the same diameter fan as a straight blade and therefore require less of a blade pitch to move the same amount of air and do it more quietly and using less power. Dennis I noticed your fan is an S-blade type I'd like the specs on it if you don't mind. If it works that well as a pusher it will be great as a puller.
This is beyond the capibilities of my 3 remaining brain cells so I'll just take your word for it. I guess as long as it works, it dosent really matter. Like they say, you cant argue with results. My fan is a 16" Derale.
heres mine, I ordered from JEGS it is a Perma-Cool 16" 3 1/4" deep, flows 2100 cfm and draws 8.9 amps in the stock radiator it fits nice. I would suggest putting on the water pump pulley before the fan because it is a tight squeeze, I found out the hard way!
