E Fan conversion
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E Fan conversion
was searching around and couldnt find a good guide for this. or somewhere i can find some more resources about how to do it.
can anyone help me out!?
anybody have this on their a/t sedan? opinions?
thanks a lot
can anyone help me out!?
anybody have this on their a/t sedan? opinions?
thanks a lot
search for thread by DaveO - he did the first e-fan conversion... he doesn’t post out here anymore, but I think he checks PMs... if you don’t find his thread send him a PM.
There was an article in SportZ magazine, but I dont know what issue - if you don’t find your answer (from suggestion above) let me know and I'll look up my back issues and let you know which one it is.
There was an article in SportZ magazine, but I dont know what issue - if you don’t find your answer (from suggestion above) let me know and I'll look up my back issues and let you know which one it is.
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Joined: Jul 2005
Posts: 75
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From: So. CaLi
I did my own and I love it.the car is sooo quiet! And seems to rev quicker.
I installed a stillen big radiator and no matter what they say about "stock replacement" it will not fit with the stock mechanical fan.
I did mine a little different from DaveO's, I used a new manual 03 G35 dual electric fan set up from Rock Autoparts, I then utilized the electrical signals (on-voltages) from my single dual winding (hi speed/lo speed) now gone factory pusher electric fan to switch the new twin manual fan through 2 fused relays connected to the battery. I retain the powertrain computer control of the fans so = they cycle with the A/C, maintain constant cooling temp based on the factory coolant temp sensor. I've been to Vegas up Cajon pass and across the Mohave desert numerous times in up to 120 deg. temps in addition to th record heat we have had this summer here in So. Cali and have had absoultly no! problems. I keep spare relays in the car though. Having the factory service manual helps in deciphering the wiring.
Cost me about $600 including the radiator ($4--) and new electric fans ($1--) electrical parts ($70).
G manuals
http://psedog.com/cars/fsm/g35/sedan/
I installed a stillen big radiator and no matter what they say about "stock replacement" it will not fit with the stock mechanical fan.
I did mine a little different from DaveO's, I used a new manual 03 G35 dual electric fan set up from Rock Autoparts, I then utilized the electrical signals (on-voltages) from my single dual winding (hi speed/lo speed) now gone factory pusher electric fan to switch the new twin manual fan through 2 fused relays connected to the battery. I retain the powertrain computer control of the fans so = they cycle with the A/C, maintain constant cooling temp based on the factory coolant temp sensor. I've been to Vegas up Cajon pass and across the Mohave desert numerous times in up to 120 deg. temps in addition to th record heat we have had this summer here in So. Cali and have had absoultly no! problems. I keep spare relays in the car though. Having the factory service manual helps in deciphering the wiring.
Cost me about $600 including the radiator ($4--) and new electric fans ($1--) electrical parts ($70).
G manuals
http://psedog.com/cars/fsm/g35/sedan/
Last edited by Awilli; Sep 9, 2009 at 03:16 AM.
version 1 cars (early 03 Gs) have machanical fans).
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I did my own and I love it.the car is sooo quiet! And seems to rev quicker.
I installed a stillen big radiator and no matter what they say about "stock replacement" it will not fit with the stock mechanical fan.
I did mine a little different from DaveO's, I used a new manual 03 G35 dual electric fan set up from Rock Autoparts, I then utilized the electrical signals (on-voltages) from my single dual winding (hi speed/lo speed) now gone factory pusher electric fan to switch the new twin manual fan through 2 fused relays connected to the battery. I retain the powertrain computer control of the fans so = they cycle with the A/C, maintain constant cooling temp based on the factory coolant temp sensor. I've been to Vegas up Cajon pass and across the Mohave desert numerous times in up to 120 deg. temps in addition to th record heat we have had this summer here in So. Cali and have had absoultly no! problems. I keep spare relays in the car though. Having the factory service manual helps in deciphering the wiring.
Cost me about $600 including the radiator ($4--) and new electric fans ($1--) electrical parts ($70).
G manuals
http://psedog.com/cars/fsm/g35/sedan/
I installed a stillen big radiator and no matter what they say about "stock replacement" it will not fit with the stock mechanical fan.
I did mine a little different from DaveO's, I used a new manual 03 G35 dual electric fan set up from Rock Autoparts, I then utilized the electrical signals (on-voltages) from my single dual winding (hi speed/lo speed) now gone factory pusher electric fan to switch the new twin manual fan through 2 fused relays connected to the battery. I retain the powertrain computer control of the fans so = they cycle with the A/C, maintain constant cooling temp based on the factory coolant temp sensor. I've been to Vegas up Cajon pass and across the Mohave desert numerous times in up to 120 deg. temps in addition to th record heat we have had this summer here in So. Cali and have had absoultly no! problems. I keep spare relays in the car though. Having the factory service manual helps in deciphering the wiring.
Cost me about $600 including the radiator ($4--) and new electric fans ($1--) electrical parts ($70).
G manuals
http://psedog.com/cars/fsm/g35/sedan/
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Joined: Jan 2007
Posts: 503
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oOoo.....i was going to say i have a 2003 g35 6mt coupe and i have an electric fan factory. I didn't know they even used mechanical fans on anything besides some cheaper line cars like the s10.
Many a Mercedes Benz and BMW use mechanical fans.
Could try here
https://g35driver.com/forums/engine-...-03-sedan.html
although Awilli's post is probably just as good
https://g35driver.com/forums/engine-...-03-sedan.html
although Awilli's post is probably just as good
A lot of trucks use them as well.
Nothing cheap about a mechanical fan. It works well and is reliable. Usually when they fail, they seize, so you always have a fan. With an e-fan, if they fail, you overheat in traffic.
From a performance standpoint, e-fan is better as less load on the engine mechanically. The load is converted electrically and increases the load on the alt however, so you still lose a little power
Nothing cheap about a mechanical fan. It works well and is reliable. Usually when they fail, they seize, so you always have a fan. With an e-fan, if they fail, you overheat in traffic.
From a performance standpoint, e-fan is better as less load on the engine mechanically. The load is converted electrically and increases the load on the alt however, so you still lose a little power
A lot of trucks use them as well.
Nothing cheap about a mechanical fan. It works well and is reliable. Usually when they fail, they seize, so you always have a fan. With an e-fan, if they fail, you overheat in traffic.
From a performance standpoint, e-fan is better as less load on the engine mechanically. The load is converted electrically and increases the load on the alt however, so you still lose a little power
Nothing cheap about a mechanical fan. It works well and is reliable. Usually when they fail, they seize, so you always have a fan. With an e-fan, if they fail, you overheat in traffic.
From a performance standpoint, e-fan is better as less load on the engine mechanically. The load is converted electrically and increases the load on the alt however, so you still lose a little power
Like many, I do wish someone would post a DIY for this mod with some decent pictures. I know DaveO's claim was the mod was good for at least 10hp according to some Gtech runs, but when asked for dynos, he became pretty defensive. Another member did the mod and tested it on the dyno, but the numbers were inconclusive as the dyno plot was a bit jacked up and "noisy". I don't necessarily want to do this mod, unless a dyno shows some decent gains (5whp+), but it sure would be nice if more people would give back to the community and take the time to do a quality DIY for this project. This question pops up about once a month and the only info to go off of is 3+ year old threads with no pics.
IMHO, it would be nice just to get rid of the fan and the idler pulley. As someone else mentioned, it declutters the engine bay. And it would make replacing the accessory belts a bit easier. Roping them around the fan was a pain when I did my belts recently.
I don't necessarily want to do this mod, unless a dyno shows some decent gains (5whp+), but it sure would be nice if more people would give back to the community and take the time to do a quality DIY for this project. This question pops up about once a month and the only info to go off of is 3+ year old threads with no pics.
I don't even think you'd gain that much? Does the G35 use a viscous clutch? If so, how much resistance does it have?
The e-fan also doesn't run all the time, so during those times, the HP load on the alt will be less than when it's cranking full speed. I've never tested the load of the OEM fan, but i'm guessing it's in the 20-30 A range giving it a draw of 0.32 to .48HP. Not much, but it's still a little drain.
How much power does a clutch-type mechanical fan draw?? I've seen estimates of 8-16HP crank. Usually the truck fans are at the higher end of the scale. I wanna guess that removing the mech fan of a g35 may give about 5-10HP at the crank...or maybe 1-3 at the wheels.
All speculation of course..i have no data sheets to back it up