Good fight, good night

 

Sure you could, how is the CAS stuck in an engine? 90 degrees to the engine. They could of fabricated something like that off the crankshaft.

 

All those pesky BMW's with Efans...don't they know it's better to have a mechanical fan??

 

What!? Red leather IS the besT!

-GSL-SEX2

I agree completely.

In fact, for the best all around performance, you want a healthy stock efan coupled to a pristine stock red leather interior.

Good for at least and extra 10-15 HP. I know, I have this set up in all my GSLs.

Here's some documentation:



http://youtube.com/watch?v=Oi7BANPkh-Y

 

Sure they COULD. But most people forget, OEM's don't want to build a car that is difficult or time consuming to manufacture. Why do you think 85% of all modern cars are FWD? Packaging. They can install the entire drivetrain and front subframe all in one go, instead of bolting little pieces on. On top of that, we're talking about a fan driven by the pulleys. That's an awful lot of linkage to run a fan when e-fans are available and take up less space.

 

Interesting discussion, its amazing how much passion there is about the subject

Thats exactly what mine is like. Can anyone recommend which fan clutch I should be ordering from that Dayco part list?

 

http://www.understeer.com/fanclutchmod.shtml

http://www.carnut.com/ramblin/dyno.html

 

Hey, check this out, mechanical vs electrical fans for RX-7's.

For the S4, but still a 7

http://howto.globalvicinity.com/gv_w...=149&co=1&vi=1

 

Wow, big argument over little upgrade!

I installed the twin efans from a 1st gen MR2 a couple years ago. I did it properly, with an adjustable thermostat controller that only runs the fans when the coolant reaches a certain temp.

I paid 15 bucks for the fans, and 18 bucks for the controller. I stayed with the stock alternator because I've never seen a lack of voltage under any conditions to date.

The fans were perfectly capable of keeping things cool. In fact, when I switched to a 2nd gen radiator I had problems re-mounting the fans and ended up only using one of the twins as a "short term" solution. 18 months later I still haven't put the other fan back on, and I'm still running cool, even during races on the hottest days. Cooling power to spare, in my opinion and as observed in real life.

The car definitely feels like it has a lot more "zip" in 1st and 2nd gears. And it removes a lot of clutter from the engine bay.

All I can say is, I did the mod and I'm happy with the results. If you want pics, they are all over this site so just search MR2 efans and I'm sure you'll find one of them.

 

I've used both the stock fan and then a 16" electric on my 13BT. The clutch fan does seem to keep the engine ever so slightly cooler. With the clutch fan the temp was a solid 88*C according to the Microtech. With the electric fan it hovers at about 90*- 92* when cruising so I've set the Microtech to turn it on at 93*. It only ever comes on when stationary or when I'm pushing it very hard. In the end it's personal preference. Both do the job if set up correctly.

 

I don't think that adequate cooling is at question here, its whether or not there is additional hp gained by utilizing an efan over the stocker. There are numerous posts here with dyno results showing that additonal hp is gained with an efan. Why is this thread still around?

 

Of course there is some gain. That's why I'm using the electric. The point is, both have their specific drawbacks.

 

Converted for us lazy Americans...

 

+1 one for the MR2 fans

 

Which is why "proper installation" is a must (no offence)...

 

Your fans scared the hell out of me when you showed me to them. I never knew fans could start up that fast!

 

Those fan clutches are amazingly durable. Go to the Pick n Pull and get one cheap. Especially on half price day.

Plenty of guys around the forum have spares. Even I have one. I bet you can get it for near shipping cost. If you lived near me you could come by and pick up my spare.

 

I think its also amazing how much air they move. Like I said, I'm only using one of them now (they come in pairs, for those who aren't familiar with them).

Since the MR2 was/is a mid engine car (supercharged, no less), with a front radiator, I think Toyota really went overboard with their cooling to avoid Fiero-like issues of overheating.

 

Here, I'll go ahead and post this picture again.

1. Shows where the "hook" on the fans hangs from the "lip" on the radiator.

2. Shows where you drill a hole and use one of the original (rx7) fan shroud bolts to complete the attachment (one hole/bolt per side).

Pretty simple. Mounting the unit itself took about five minutes.

 

Wow... looks really easy, this is from the first gen MR2 right? Does it matter if it is a supercharged or not?

 

Very nice install...it does look factory...the only thing I'd change would be to cut the bolts down that go into the waterpump so you can ditch the fan clutch stand/adaptor altogether...just remember to paint the water pump snout since it will now be sticking out for all to see from the water pump pulley itself, which I'd powdercoat...

 

Don't cut anything. Get four oil pan bolts.

 

It is easy. I grabbed one from a 1st gen MR2 at pullapart for $20.00. Took most of my time cleaning it up and painting it. The installation was pretty easy. Mines similiar, the upper lip of the fan overlaps the lip on the radiator and then I have two bolts that screw into the original upper shrouds mounting points on the radiator mount.

I like the dual fans because I wired each fan on independent circuits so if one fan or relay blows the other fan will keep on working.

I'm not even getting into this debate :-)

 

The main point i made that no one seems to be getting is that the clutch fan DOES ENGAGE TOO EARLY, optimal running temp would at LEAST 90degC ~ ~240degF, but the clutch fan fights to keep the coolant around 78degC ~172 degF, which is unnecessary energy expenditure, and also the coolant is cooler than you want it because atomization improves with higher temperature!

 

240°F sounds kinda high to me.