I've got it installed with a little work to the core support. I had to trim some threads off the water pump and fan drive. I'm a little worried about the clearance. It's a solid 7mm between the fan and the radiator. What do you guys think? Run it or install an electric fan? My engine mounts are newer and filled with poly. I could probably switch to solid mounts.
I'll probably get the engine running with the new Megasquirt setup and play this one by ear, no pun. Electric fans aren't really the bridge I wanted to cross just yet as I'm hoping to find a PWM solution.
The stiff motor mounts are a good idea but I think I'd install some chains to limit the forward position of the engine relative to the front frame rails.
I'll probably get the engine running with the new Megasquirt setup and play this one by ear, no pun. Electric fans aren't really the bridge I wanted to cross just yet as I'm hoping to find a PWM solution.
Why not wire up like photo below. Three relays allows for a high and low speed setting. I doubt the car photographed has A/C so no reason to deal with an additional relay for that, just use MS to power up the fans when the engine on as your switched 12V source. Not sure if your MS unit has the ability to run dual settings, so you may have to consider something else if you need a high speed setting. Maybe use an E32 aux fan switch which is 91°C/99°C, center terminal is always grounded other ground once set temperature is reached.
I wired up some Ford Contour fans like this for my 560SEL, work great.
I could run the stock aux fan circuit for a 2 speed single fan through the body electronics and temp switched alone. It's just not what I wanted to do right now. The A/C is off the car but built in a way I could add it back in if I wuss out. If I add a/c, the plan was to wire a single cond fan to the stock aux wiring and then run 2 10" pulled fans from Megasquirt. I've got plenty of low voltage outputs I can use.
I do like that relay setup though. I could use 2 outputs from Megasquirt set at different temps or a combination of any input I like.
I am too old I guess to drive without A/C anymore.
Hopefully the relay setup helps, even better is the ease you can set the exact temperature ON/OFF settings with the MS unit. I prefer via an ECU or fully passive such as the temperature switch. I have fucked with many controllers over the years and they always seem to crap out after a while.
The relay diagram is the same design GM used on the 2005+ half ton trucks. I retrofitted my '01 Silverado with that factory setup ages ago and had no issues with it. Hey, more power also!
I'll probably get the engine running with the new Megasquirt setup and play this one by ear, no pun. Electric fans aren't really the bridge I wanted to cross just yet as I'm hoping to find a PWM solution.
Looks like a high performance 12" Spal fan would max out around 15 amps. Though I haven't used one personally, you should be able to run a solid state relay from one of the generic PWM pins to control fan speed.
Mike, you had a very nice electric fan set up on the red car way back in Tupelo. Any reason you could not make another set up like that?
My ex-535iS ran the fan closer to the radiator than you pictures seem to show and there was never an issue. My bone stock ZHP also runs the fan extremely close to the radiator, just an observation.
I found the fan blades were hitting the crank pulley at higher rpm. While I could've swapped a non a/c pulley on, I decided to install a 16" pusher in front of the rad. Randy, I did try to duplicate the dual 10" fans I had years ago, but the extra thickness of the summit rad won't allow for much of anything behind it. As I was running out of time before vintage, this fan option may have been done in haste. Either way, I wired 2 outputs from Megasquirt to control the ground side of each fan speed relay. I jumpered the fan switches as needed and used the stock wiring and resistor to run the fan at 2 speeds. The low speed comes on at 180 and high speed at 198. Both require engine speed to activate, as to not run with just key on. During the 1800 miles I put on the car driving to Vintage, The Tail of the Dragon and other fun roads, I never overheated, heard the high speed fan come on or even saw the temp gauge move from the left edge of the printed temp flag on the gauge.
They're great radiators for sure. Someone posted a diesel fan on Facebook one day. It was much thinner. That might work in this type of install if someone didn't want to do all electric.
My NA V12 car is running a summit radiator and a two speed electric fan pulled from an e39. I'm running it off a 318ti temp switch. I've never heard high speed and low speed has only run for a max of about 45 -60 seconds at a time.
