Fan solution for intercooler
Discussion
From the US forum, someone posted a message pointing out 1g use zirgo fans on their car. These are pefect as 8" ones do 1000cfm, and you can fit two.
They also have a full digital adjustable temperature relay to control them.
Seems absolutely perfect. Gonna see about ordering a pair and the relay.
www.zirgo.com/detail.lasso?itemid=ZF8
www.zirgo.com/detail.lasso?itemid=ZFSDG
Seems absolutely ideal!
V6GTO said:
What about a shroud, Dan, aluminium sheet?
Martin.
Yeah that would be ideal, only issue is that it will then mean having to run the fans almost permanently as it will impede airflow the whole time (what little there is).
Other thing I've spotted is that another fan manufacturer sells fans that are designed to mount directly to rads and has some kind of thinnish gasket between the fan and the rad. This might be good enough and avoid the above problem. I don't really want them on full time if possible as they are going to be noisy with that kind of performance.
... www.mahaffeymotorsports.com/FanShrouds.htm .. getting a bit complicated isn't it.DanH said:
From the US forum, someone posted a message pointing out 1g use zirgo fans on their car. These are pefect as 8" ones do 1000cfm, and you can fit two.
They also have a full digital adjustable temperature relay to control them.
Seems absolutely perfect. Gonna see about ordering a pair and the relay.
www.zirgo.com/detail.lasso?itemid=ZF8
www.zirgo.com/detail.lasso?
itemid=ZFSDG
Seems absolutely ideal!
1g Racing didn't use a Zirgo fan. They used one 10" Spal fan. I found the Zirgo fans after doing a little research and decided to go with two 8" fans on mine. The instructions for wiring, as provided by 1g Racing, can be found at:
www.nobleforums.com/showthread.php?p=477#post477
The Zirgo fans look to have a lower profile and they definitely have higher cfm ratings than the Spal fans.
Craig
chillidog said:That's a great link, but I yhink I'll be tempted to make my own.
Martin.
obes said:
Will you try it just with the fans and no shroud to start with ? It's just i'm thinking that the fans will make a massive difference on their own and making a shroud could turn out to be a huge pain for very little improvement ?
Yeah I'm thinking to just try the fans as long as they don't let air in around their edges. i.e. the bezel of the fan goes flush to the rad.
Failing that I'll give that manufacturer a ring, thats an awesome looking shroud!
V6GTO said:
That's a great link, but I yhink I'll be tempted to make my own.
Martin.
I think that you will find that there won't be much room for a shroud because of the way the clamshell fits around the intercooler. I will just be mounting the fans directly to the intercooler without a shroud. The Zirgo fans should have a thin enough profile to be able to mount them without any other modifications.
Craig
Craig
caccobra said:
V6GTO said:
chillidog said:
That's a great link, but I yhink I'll be tempted to make my own.
Martin.
I think that you will find that there won't be much room for a shroud because of the way the clamshell fits around the intercooler. I will just be mounting the fans directly to the intercooler without a shroud. The Zirgo fans should have a thin enough profile to be able to mount them without any other modifications.
Craig
Craig
Whens yours going in? I'm in email contact with a zirgo distributor, but I've got a feeling shipping is going to be a killer, so be nice to know they fit ok before placing a reasonably expensive international order.
I'm definitely going to go for the thermostat rather than the fog light switch as we use ours in the UK, and I think I prefer a fit and forget solution anyway.
I've also asked about volume discounts in case any UK people want to share the shipping etc.
p.s. Craig, sorry I didn't credit you initially. Thats an awesome fan you found (assuming they aren't lying!).
>> Edited by DanH on Wednesday 16th February 17:38
DanH said:
I think that you will find that there won't be much room for a shroud because of the way the clamshell fits around the intercooler. I will just be mounting the fans directly to the intercooler without a shroud. The Zirgo fans should have a thin enough profile to be able to mount them without any other modifications.
Craig
Craig
Whens yours going in? I'm in email contact with a zirgo distributor, but I've got a feeling shipping is going to be a killer, so be nice to know they fit ok before placing a reasonably expensive international order.
I'm definitely going to go for the thermostat rather than the fog light switch as we use ours in the UK, and I think I prefer a fit and forget solution anyway.
I've also asked about volume discounts in case any UK people want to share the shipping etc.
p.s. Craig, sorry I didn't credit you initially. Thats an awesome fan you found (assuming they aren't lying!).
>> Edited by DanH on Wednesday 16th February 17:38[/quote]
Hey, no problem, Dan. I was just trying to correct the error about the type of fan that 1G put on their demo. No pride of authorship amongst the Nobility. I probably won't be able to actually install the fans until we get some better weather here in Michigan (another 30 days or so). I have to move some of my other cars around to free up my hoist before I can put the Noble on it and drop the belly pans and route the fan wire through the tunnel. I'll take pictures of the fans when they arrive though, so you can see what they look like. I agree, they do look like a better fan than the Spal (only draw 5amps each and higher cfms), if their advertising is accurate.:-)
Craig
DanH said:
Will you try it just with the fans and no shroud to start with ? It's just i'm thinking that the fans will make a massive difference on their own and making a shroud could turn out to be a huge pain for very little improvement ?
Yeah I'm thinking to just try the fans as long as they don't let air in around their edges. i.e. the bezel of the fan goes flush to the rad.
Failing that I'll give that manufacturer a ring, thats an awesome looking shroud!
Whilst shrounds do make a big difference, I'm with Owen thinking it'd not be worth the effort. You'd probably find a set of fans where the number plate is would work well too.
DanH said:
My main concern is that there aren't any nasty suprised sitting them directly onto the intercooler (e.g. clearance probs etc).
Have you placed an order for them yet?
I'm away skiing for a week anyway, so won't be doing anything before I get back I suspect.
Yes, I ordered them this morning.
Should be no problem mounting them directly to the intercooler. They were designed to mount directly to a radiator. Same principle. Not sure a shroud would ever fit there anyhow, given the way the clamshell is designed. One guy over here has already installed a 12" Spal fan on his and found that they had to shave part of the back side of the fan so they could close the clamshell. So not a lot of room to play with there. Besides, the way they are right now, there is very little airflow going through them, so any improvement would be far better than doing nothing. The two 8" fans should cover 4/5 of the intercooler anyhow, and all we're trying to do is get more air moving through to slow down a heat soak situation and to keep horsepower up on hot days. While a shroud would improve that even further, it would probably mean you would have to have the fans running all the time, since it would restrict normal airflow (what little there is) wouldn't you think? With no shroud, the fans themselves don't really hamper the normal airflow that much. So whoever gets it done first has to report back with pictures, etc........
Craig
DanH said:
This does say it all about shrouds though :
Still I'm not going to bother to start off with although they look really nicely made.
Not strictly true, 50% isn't being DIRECTLY cooled by the fan but cooling 50% of the surface area via the fan will lead to a temp drop across the whole surface of the core. Think of it as a solid metal box full of water - if you cool a small section of the box the temp of the entire volume of water within the box will drop, okay this doesn't take flow characteristics into account and is a very basic example but is accurate.
Whilst an unshrouded core may not be quite as efficient as a shrouded unit under fan on conditions it also doesn't take up anywhere near the room of a shrouded unit, doesn't weigh as much, doesn't cost as much and doesn't reduce ambient flow through the outer edges of the core.
There's pros and cons but IMHO a shrouded unit isn't worth bothering with unless you have major overheating issues (which a redesign of the cooling system would solve) or your planning a desert rally.
Matt
>> Edited by matt_t16 on Wednesday 16th February 20:21
caccobra said:
One guy over here has already installed a 12" Spal fan on his and found that they had to shave part of the back side of the fan so they could close the clamshell. So not a lot of room to play with there.
Craig
I think, actually, it was an 11" fan (Spal 11" 810 cfm fan: 12.2" tall, 11.57" wide, 2.05" thick) that was installed and needed to be shaved (if we're talking about a certain red 3R).
DanH said:
or your planning a desert rally.
lol can you imagine doing that in a noble? Jack the ride height nicely and off you go!
Well the space frame is stiff enough to allow a certain amount of re-engineering and a few feet of suspension travel
M12 Paris-Dakar edition 
Matt
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