Fan Shroud

[s14_sport]

the skyline fan shroud isnt much of anything anyhow...try it without the shroud for now, you will not be disappointed.

[nismoplsr]

Nissanparts.cc usually stocks R32 fan shrouds but they are currently backordered and with the disaster in Japan they don't know when they will be getting any.

[Shocker]

Im running one w/o a fan shroud. It works 100x better than pusher efans.

[amorasin]

what kind of radiator are you running cause im test fitting my koyo and it fits but theres no way i could fit a clutch fan in. im running an r32 member.

[Tenchuu]

I am running a R32 crossmember with syko mounts, a griffin radiator and a stock fan. was a real tight fit, but flipping the fan and shaving off the back allowed mine to fit.

[placham]

How you guys fitting them in. R32 x-member with oem rb20 mounts. Front of my engine is sitting up higher than back, and got about 1"-1.5" clearance to firewall. With KA rad I could barely fit 2 slim puller fans before hitting P/S pulley.
I would prefer to run clutch fan. Oem R32 rb20 fan shroud in my possession, bought it new for like 100 bucks off of ebay, some Nissan shop/dealer. And I dont think it wanted to slide in between rad and P/S pulley, IIRC then need to be trimmed to fit?

This is where I sit right now, still need lots of work.



SRY 4 thread jak.

[Yellow4g63]

If it helps when I have to take my radiator out I have to take the fan off the fan clutch 1st and then pull it up along with shroud and radiator. Also the OEM shroud need to be trimmed to fit the KA radiator.

[placham]

Yellow4g63< if you dont mind me asking, whats the spec on the rad your using (KA Koyo?) And the fan shroud is like the one I have, do you block off the opening in the shroud on lower left? I guess most people recess the rad into the rad support. As for the clutch does it matter Ka or Rb? And the fan, did you flip it around, any trimming required? You got any overheating problems?
I just want to ditch the electric fans, and everything associated with it.
Is yours setup that way, I noticed in the thread Carl H. opened up with videos. Thats your S14 with Rb20 right, you posted.

By the way, in that 1st video, your running just downpipe right, cause Rb's seem muffled/quiet with exhaust (at least stock eng.)

Thanks,
Matt

[Yellow4g63]

Yellow4g63< if you dont mind me asking, whats the spec on the rad your using (KA Koyo?) And the fan shroud is like the one I have, do you block off the opening in the shroud on lower left? I guess most people recess the rad into the rad support. As for the clutch does it matter Ka or Rb? And the fan, did you flip it around, any trimming required? You got any overheating problems?
I just want to ditch the electric fans, and everything associated with it.
Is yours setup that way, I noticed in the thread Carl H. opened up with videos. Thats your S14 with Rb20 right, you posted.

By the way, in that 1st video, your running just downpipe right, cause Rb's seem muffled/quiet with exhaust (at least stock eng.)

Thanks,
Matt

I Didn't block off the opening on the lower right. It's a KA Koyo. The fan clutch is a RB unit and the fan isn't flipped. I notched the core support so I could move the radiator forward. I saw someone post one where they said they didn't have too. No over heating problem at all temps are lower now than it's ever been. Yes my 1st dyno vid is open downpipe, the others I have the exhaust hooked up.

[amorasin]

This is my fitment from the other night:

Koyo radiator



I have no way to fit my clutch fan but i found i could put the fan in backwards instead of flipping it to optimize space. I cant even fit my isis fan and shroud:



I'm considering cutting up the core support but rather just find a way to fit the clutch fan in.

yellow- how much did you cut?

[placham]

amorasin, what engine mounting setup are you running?

And I think there's 2 different thickness rads Koyo makes, probably the thinner the better for clearance.

[amorasin]

im using the r32 crossmember for my rb20. im going to wire up my isis fans as pullers and make some sort of shroud if i cant figure this out.

[placham]

Dont want to start a new thread.
Been playing around with my fan/clutch.
What clutch are most people using, what radiator (if koyo its the slimmer one right?)

Noticed that when I pulled off fan clutch off of my 95 KA its slimmer than HCR32 RB20 clutch, which gives about .25" to .50" of clearance from radiator. Also using KA fan blade (since Rb20 fan wont mount onto KA clutch) it give another ~.25" .

Is that what I should be using, ditch RB20 gear and use KA clutch/fan, Ka fan wont clear crank pulley so blades on back need to be trimmed some, but fan is facing correct way, and it would be pulling air in from rad onto engine. And Ka and Rb fans are same size just different spacing of bolt mounts and Ka mount is centered in middle of fan bld as Rb has fan blades set forward to clear crank pulley.

Also I noticed GTR fan bades are straight instead of KA/RB20 which are curved at ends, whats that all about, and is GTR fan assembly thinner than HCR32's

Im on R32 x-member with R32 mounts, think this is important too since different mounts position engine differently.

Otherwise, I'm thinking of chopping off bottom section where radiator sits between both frame rails. And welding in "L" shaped bar and stuffing radiator under core support.

Oh yeah this is in a S13, think S14 have little more room to play around in.

[placham]

Okay got my @ss outside and did some work. Guess I anwsered my own post.

Here's what I got so far, KA clutch and KA fan, trimmed blades on back side to clear crank pulley.
I can slide in and out my radiator without any problems, its a stock 240sx auto trans rad from SOHC KA.
Radiator core support isnt touched at all , no cutting or trimming on it at all.
Im just wondering if Im going to run into any cooling issues with trimming blades
And other thing is I still have to see if fan shroud fits inthere.
Is Koyo aluminum radiator same size as stock 240sx is? I want to upgrade my rad but need something as close to stock size as possible.
Here's some pic to go along with it, hopefully this helps someone thats thinking about doing this.

[Yellow4g63]

The koyo is thicker than the stock radiator. I think it would be really close if not touching in your car.

[placham]

The koyo is thicker than the stock radiator. I think it would be really close if not touching in your car.

What about running stock KA radiator, is manual trans radiator thicker than auto rad, cause I have auto rad and mine is beat to $hit. I havent had problems with it and electric fans. And noticed the auto rad on a KA S14 is thicker than my S13 KA rad, might upgrade to that one.

And thinnest Koyo rad, the core is even with the end tanks right, unlike stock 240sx plastic tanks where core is thinner than tanks.
Just trimmed my HCR32 fan shroud to my rad besides top hose clearance it fits like a glove.

[Yellow4g63]

The koyo is thicker than the stock radiator. I think it would be really close if not touching in your car.

What about running stock KA radiator, is manual trans radiator thicker than auto rad, cause I have auto rad and mine is beat to $hit. I havent had problems with it and electric fans. And noticed the auto rad on a KA S14 is thicker than my S13 KA rad, might upgrade to that one.

And thinnest Koyo rad, the core is even with the end tanks right, unlike stock 240sx plastic tanks where core is thinner than tanks.
Just trimmed my HCR32 fan shroud to my rad besides top hose clearance it fits like a glove.

The Auto KA radiator should be thicker because it has the transcooler built into it. When I had my S13 I went from the 5speed one to the Auto Modine radiator from the parts store.

[placham]

Cool thanks, I'll look into manual KA S14 rad, or get another rad like I have auto KA S13.

[RRRRB]

i really need to do this, my car will over heat with the AC on... all that work to make AC work and it just overheats..

i have an R32 fan shroud to fit in as well, there is no way my ghetto CX racing radiator will work, to thick, gonna try to resort back to stock s14 auto radiator and hope fully it will fit..

here are a few pictures i have 3" 1/4 inchs from front of water pump pulley to radiator core pictures almost make it look better than it really is for some reason

setup - s14 car mckinney mounts stock cross member cx racing radiator Rb25 it was almost 80 degrees here today and temps got to 217 degrees while on freeway with ac on, turned it off temps went down and hung around 200-205 still to warm for my liking..

[Ramius83]

I had to switch back to the stock radiator. I was dyno tuning my car later last month and the clutch fan was so close to the KOYO radiator, that the fan actually pulled/twisted into the radiator. I was doing a 4th gear pull at 7500 or so RPMs, then pop, coolant went everywhere. Went to the stock radiator (new and aftermarket), and so far has not gone above 185 degrees, on back roads or on highway......Clutch fan for the win......

BTW. RB26, SYKO mounts, R33 RB25 subframe.....

[RRRRB]

here are a few pictures of my install, just finished it today...

coolant temps never got above 180 with the AC on!! finally it works

[Yellow4g63]

Looks really good!

[FAST-DATSUN]

WE move the rad forward to use puller electric or stock fans really easy on the S14 alittle harder on the S13...

[jetdriver]

here are a few pictures of my install, just finished it today...

coolant temps never got above 180 with the AC on!! finally it works

I have the same setup and problem you had. Can you tell me the details of what fan you used, and if you modified anything (trim fan blades, etc.) It is over 100 degrees outside and I need to run my ac!
Also what is the distance from your timing cover to your core support, or back of head to firewall? I am trying to gauge where your motor sits in relation to mine. I am using gtr isolators on R33 crossmember.

Thanks!

[RRRRB]

i used the stock R33 rb25 fan, i had to trim both sides of fan for crank pulley clearance and shroud clearance, the fan is also mounted on the other side of the clutch to attain more room...

From the front of the water pump pully to the core of my aftermarket radiator (using stock now) was 3 1/4 inchs i have a little over 4 with the stock radiator in place..

My motor is very close to the fire wall almost touchs the AC line that goes behind it

[jetdriver]

Thanks! I need to move my motor back about 1-1 1/2" to make the fan work on my car. Which means I have to message the firewall by the starter, and make new engine brackets, and trans x-member, and probably shorten my driveshaft. Did I mention it was 100+ degrees here.... I have little motivation to work on this!

[RRRRB]

it was almost 80 here today and i drove all around city driving mostly, never got above 185

[Yellow4g63]

you need to cut the hood too make it fit when u do that. I had to hack up my carbon fiber hood so it would close.

[RRRRB]

i didnt cut anything besides the fan blades, im rocking AC as well, a little motivation and it will fit, dont cut your cars

[Yellow4g63]

Must be my carbon fiber hood. It wouldn't clear at all with the Koyo.
This is the most it would do before I cut it.

After


wish I could have but didn't bother me since it fits like crap anyway and was cheap 5 years ago lol.