Last summer i got the opportunity to try out and test the Mizu radiator and fans https://my350z.com/forum/engine-and-...with-pics.html . After driving on the crazy *** desert heat and hitting the track with them, we have decided to try the next level. Talking to http://sparkplugs.com/ we are going to modify my stock Mizu fan shroud http://www.mizuracing.com/product.asp?p=fan&pvid=42028 with it 12 inch fans and modify it to accept the 14 inch fans.

http://www.flickr.com/photos/61208532@N05/6941611017/[url=http://www.flickr.com/photos/61208532@N05/6941611017/]
Just for reference, shows the size difference between the two.

The idea behind this, improved cooling while stuck in traffic for the FI guys. The system is already better at pulling air thru the radiator than the OEM fan shroud. Some people have big Hp and have bigger needs. The next reason is for the racetrack, high speeds push a lot of air thru the radiator, with this being a well sealed shroud all the air has to escape thru the fans to flow thru the radiator. So part of the testing, we want to know if cooling will improve on the track at speed. Off the top of my head, at around 30 mph radiator fans become useless, they are no longer pulling air thru, on the track I am consistanty above 30 MPH. In theory, bigger hole for the fans, more air can pass thru, cooler temps on the track.

I'm going to mount them to the shroud tonight and possibly start cutting. Still in the air between using a jigsaw or a nibbler to do this. I may even do one hole with one and vice versa, just for the experiance to post the results.

Track testing will be performed in 2 weeks at Buttonwillow, then we have to wait a couple month for the 120 degree days, then getting stuck will be simple to do in Vegas. Got my Cobb Accessport for data logging as before. Time for some fun.

 

I figured this would happen, just like the mishimoto fan set up. Let us know how you do in the summer

 

In on results. I have a new Mizu shroud and rad waiting to be installed with my LS2 swap.

 

Interested in this for sure. I'm looking at replacing the fans on my shroud as well.

 

Between work and a newborn, free time is hard to find. Finally finished up, i made the first cut with a jigsaw, thru a metal blade in it and it cut it like butter. Only problem was when i got near the middle of the shroud, the center would flex and the blade would catch. This is part of the reason i had to install a center brace, don't know if it would have been a problem if i didn't use a jigsaw.

After my first unsuccessful attempt I wanted to get down to Paladin Advanced and try out a high speed air saw on it. No luck getting down there, but i expect a saw like that would work great. Sitting at home during naptime i broke out the tin snips, great solution, cut right thru, leaves some jagged edges to get grinded/filed down, the fans actually cover up any imperfections anyhow.

Since the center of the shroud was didn't have much metal left do to the fan size i decided to add a support rib. Simple and easy, i grabbed a piece of 1/2 inch angle aluminum from Home Depot, cut it to size, bonded it with some left over gasked maker in my garage and finished it off with 5 pop rivits.

Finishing it off, drilled the 8 holes that mount the fans. These holes are on the outer edge of the shoud. If the fans were 1/4 inch bigger, they probably wouldn't have fit! Wired them back up the same as last time, but i did add a couple as aviation clamps to secure the wires and make the install look a bit cleaner. While I was at it with aviation clamps i added 2 of them to the top for the radiator overflow hose routing. The hose is clipped into the OEM shroud, and flopped around with this one, similer clamps are available at the local hardware store.

Finally dropped it back into place, connected everything up, bleed the cooling system and good to go. There is a slight rub on the AC line on the drivers side, a slight tweek of the line was made so the fans would actually fit in place. It is a plastic to aluminum rub, will not effect the AC line at all.

The backside to see how much the shroud is opened up, it is going to be able to flow a lot of air thru it.
http://www.flickr.com/photos/61208532@N05/6985360737/

The front, you can easily see how much room these bigger fans take. The clamps for the wires are also shown in the pics. On the top of the shroud in the same locations is where I mounted the overflow hose clamps (not pictured)
http://www.flickr.com/photos/61208532@N05/6985359693/
This last pic shows the rib that was installed. It was actually really simple to do. you could probably even use sheet metal screws if yu wanted, just make sure they are not to long so they can't cut into you precious Mizu radiator.
http://www.flickr.com/photos/61208532@N05/6985360177/
Next major update to this will be after some hot summer driving and a few days on the track. 1 April i will be out on Spring Mountian Motorsports Ranch with it, then I'm sure the Vegas heat will creep up on me quickly for the summer heat testing.

 

Well I got it out to the track yesterday, it ended up being a cool low 60 degree day and had no problems with engine heat. Not really the ideal conditions i wanted for testing, I was hoping for at least temps into the high 70's. My water temps got up to 203, the track layout was changed up at SMR, lots of high speed WOT running. All in all, good, but i want a better day to test. Hopefully the weather in Vegas will heat up to start doing the daily drive in traffic testing.

 

Sweet... looking forward to more info.

 

Terra did you ever snap any pics of this?

 

Pics of?

 

Couldn't the rib be hindering your cooling, since it is effectively cutting the draw from the fan down to half of the radiator when only one fan is running?

I can see the need for the added support after cutting the shroud, but maybe flat stock would be better than angle?

 

When only one fan is running, who cares.

It actually probably helps, channels the air better.

 

Couldn't remember what I was talking about..
Anyways.. How do you like the shroud/radiator combo? They are running so cheap I'm thinking about picking them up!

 

will be doing this myself soon.. i think ill have to stick w a 12 inch on the drivers side tho due to my snail being right there are very clsoe to the shroud.

im buying an 80 dollar total POS 2-12 fan shroud off ebay, then installing the ebay fans in the trash can lol.

Spal curved blade 12 and 14 on the AC side.
should move 2500 cfm when theyre both on.

 

Will have to say , the 12 inch setup is better and I removed the radiator for an AMS.

 

Sorry to bump a dead thread, but why would you say the 12" was better than the 14"? And how did the AMS work out? I have a Mishimoto and am needing to step to the next level in cooling. Hoping just a pair of 14s would do it, but your comment has me doubting that now.

 

what did you end up going with? I'm stuck between the spal 12in 1340cfm or should I mod my shroud to fit 13in?

 

I’ve learned that the fan pushing air is one thing, then a clear and free flow when the car is moving is another thing. Once over around 30 mph the fan restricts air flow. For track purpose , what my needs were, my car was hardly under 30mph.

 

This is exactly what I'm dealing with now. I have a single top front turbo mount and things get hot and I think my mishimoto shroud is restricting my airflow at higher speeds. I removed my hood and noticed a huge difference as my Temps did not get above half way! What did you do to increase air flow? I just got a vented hood I'm hoping that helps.

 

Believe it or not, had a 14 inch fan fail and I installed a 12 back in place but left the surrounding gap for air to escape.

next I installed a vented hood. Looking at designs, I figured the one I grabbed would pull the most amount of air out.



then I worked on panels from the bumper opening to the radiator, the goal, all air gets rammed through that radiator with little leaking to the side.