Upgrading Radiator System Questions on Components - Page 5 - LotusTalk - The Lotus Cars Community
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post #81 of 233 (permalink) Old 06-02-2012, 01:15 PM
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Just a FYI- fewer fan the better for a track car... fans, associated hardware, and motors block more flow than they create at speed. The fans are there for stop n go traffic and the pit area.

I have a single 8" fan dead in the center of my radiator and the car will NOT over heat with it... NOW, that is for a track car. No A/C and a big arse radiator and no street driving. The clam "back bone" doesn't block enough flow to matter, really.

So with that, two 8 or 10 inch fans would be fine for a street car. My suggestion is to run a single puller for a track car with no AC at 8 or 10 inches and call it good...

Hope that helps,

Phil
I ordered a single 10" puller from Spal and will Fab a mount for center placement. It doesn't look tough and I checked the clearance for the fan and 2.0" should work.

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Last edited by Eyelise; 06-03-2012 at 04:45 AM.
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post #82 of 233 (permalink) Old 06-02-2012, 01:23 PM
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Perhaps I'm being nieve but have you tried simply reversing the electrical connections so that the motor spins (the blades) in the opposite direction?
I thought of that but actually the way the blades are oriented it would not work. They don't move any air if just in reverse.

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post #83 of 233 (permalink) Old 06-02-2012, 01:24 PM
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I ordered two Spal 10" low profile puller fans. 2" tall. I have conformation that they will fit.
$55.00 each. Free shipping.
I'm getting the single pass radiator too. Keeping the ac for now. It's hot down here.
Pulled the thermostat last week. Cut the vains off my water pump too. I going electric.
Jim can you let me know where you ordered them?

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post #84 of 233 (permalink) Old 06-02-2012, 04:44 PM
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I ordered the Sector 111 pullers...
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post #85 of 233 (permalink) Old 06-03-2012, 04:08 AM
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Jim can you let me know where you ordered them?
Link for Spal fans.

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post #86 of 233 (permalink) Old 06-03-2012, 04:31 AM
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Originally Posted by jim-clayton View Post
OK I got the curved fan with the same dimensions but rated at 850 CFM rather than 650 CFM. I'm going with one center mounted fan. Jim, I spent some time with the new radiator installed trying to fit the OEM pusher on top. The OEM AC Spal pusher is a 10" with basically the same dimensions as the pullers we ordered. I can not see any way you can fit two 10"s on top without a lot of modification to the shroud.

You may be able to fit them if you put a few spacers btwn the shroud and mounting clamp at the front to drop the radiator lower and cut out the "humps" in the front of the radiator shroud. There are three and I'm going to remove the central one today to give me more room for my center mounted fan.

BTW, a center mounted 8" would not need any modification of the shroud. I looked and most of them were rated at 400CFM which I thought was just too low to make any difference.

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Last edited by Eyelise; 06-03-2012 at 04:41 AM.
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post #87 of 233 (permalink) Old 06-03-2012, 04:32 AM
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I ordered the Sector 111 pullers...
They were back ordered and I just couldn't wait. The shipment is on the way so I'm sure it won't be long. I also wanted to go with just one fan.

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post #88 of 233 (permalink) Old 06-03-2012, 04:40 AM
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Do you think we can mount the pullers right on the top of the radiator with the ties that pass thru the radiator to the other side. It would make the job so easy. I bought four at the Spal website. I just don't want to mash any fins but it does look like a pretty common way to do it.

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post #89 of 233 (permalink) Old 06-03-2012, 04:50 AM
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I ordered the Sector 111 pullers...
Nice mounting bracket with the Sector kit.
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post #90 of 233 (permalink) Old 06-03-2012, 05:13 AM
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Do you think we can mount the pullers right on the top of the radiator with the ties that pass thru the radiator to the other side. It would make the job so easy. I bought four at the Spal website. I just don't want to mash any fins but it does look like a pretty common way to do it.
Yes, I plan to mount fans directly to the radiator with the little foam spacers and the plastic ties. As you say, very common mounting method.
Maybe sector designed that big mounting bracket for a particular reason ??

I pulled the clam off yesterday and removed the radiator. I was lucky and the stock fans didn't chew up my ac condensor.

I don't have the 10" fans yet. I'll know for sure next week if they fit. I don't mind modifying the shroud or mounts. I really want all the fan I can fit.
I like my AC cold when I'm driving around town, all 100 miles a year.

I will return the two 10" low profile fans and get the higher cfm unit if they don't fit.

I'm thinking about making the front clam a quicker release. If I can find decent looking latches.
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post #91 of 233 (permalink) Old 06-03-2012, 06:30 AM
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Originally Posted by jim-clayton View Post
Yes, I plan to mount fans directly to the radiator with the little foam spacers and the plastic ties. As you say, very common mounting method.
Maybe sector designed that big mounting bracket for a particular reason ??

I pulled the clam off yesterday and removed the radiator. I was lucky and the stock fans didn't chew up my ac condensor.

I don't have the 10" fans yet. I'll know for sure next week if they fit. I don't mind modifying the shroud or mounts. I really want all the fan I can fit.
I like my AC cold when I'm driving around town, all 100 miles a year.

I will return the two 10" low profile fans and get the higher cfm unit if they don't fit.

I'm thinking about making the front clam a quicker release. If I can find decent looking latches.
I took a look at the Sector111 mount and the fans are significantly offcenter and overlap the top radiator mounting flange. That is how they avoided the "humps" I mentioned. If you do the same the 10" should be fine. FYI the OEM pushers are the curved fan 850 CFM 10"s. If no AC is installed the pushers are 12" and rated even higher. From what I read on Eliseparts, the higher rpm 10"s (that I bought) are known to "ghost" or **** the bed. Mine lasted fine for 7yrs. You may want to stick with what you have. I also saw a few 10"s (not Spal) rated at 1100 CFM. The amp rating was significantly higher so you might have to swap out a fuse. Just another option.

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post #92 of 233 (permalink) Old 06-03-2012, 07:47 AM
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Ey, you got PM.
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post #93 of 233 (permalink) Old 06-03-2012, 08:12 AM
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I think two 10" will fit.
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post #94 of 233 (permalink) Old 06-03-2012, 02:42 PM
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You need to button up the front brackets to see. I basically installed mine to check. You will see the shroud needs to be cut if you do. Alternatively you can slide the fans to overlap the mounting flange like Sector111 did but that will make it difficult to use the zip ties. Maybe there is room, but it will be tight. You should consider a spacer at the front to drop the radiator if it is tight.

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BOE Rev 400, fuel surge tank, EFI 1.2
PPE Testpipe, BOE Silent Touch
RacePak IQ3 dash with EFI module
ACT HD/SS clutch, Fidanza FW, LETSA...

Last edited by Eyelise; 06-03-2012 at 03:07 PM.
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post #95 of 233 (permalink) Old 06-03-2012, 02:48 PM
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10" puller center mount

Mine with the front brackets installed. It is tight and gets tighter if I slide the fan to either side
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BOE Rev 400, fuel surge tank, EFI 1.2
PPE Testpipe, BOE Silent Touch
RacePak IQ3 dash with EFI module
ACT HD/SS clutch, Fidanza FW, LETSA...

Last edited by Eyelise; 06-03-2012 at 03:13 PM.
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post #96 of 233 (permalink) Old 06-03-2012, 02:54 PM
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Look at you! I was gonna swing by today and see if you were working on it. The gf and I went shopping instead though.


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post #97 of 233 (permalink) Old 06-03-2012, 03:02 PM
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That is actually the OEM fan I'm still waiting for the puller but mocked up the install. They are very close in spec. I should be on the road by the end of next week, I hope. I have to put my track schedule together. I'd also like to log some data for Phil to take a look. I want to make sure the tune is reasonable.

I'm might even join you for one of your autocross events although I hate standing around for 8hrs for 7 min of driving. LOL

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post #98 of 233 (permalink) Old 06-03-2012, 04:06 PM
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That is actually the OEM fan I'm still waiting for the puller but mocked up the install. They are very close in spec. I should be on the road by the end of next week, I hope. I have to put my track schedule together. I'd also like to log some data for Phil to take a look. I want to make sure the tune is reasonable.

I'm might even join you for one of your autocross events although I hate standing around for 8hrs for 7 min of driving. LOL
Come to an SVT or corvette club event you'll get 10+ min of driving! Haha


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post #99 of 233 (permalink) Old 06-03-2012, 10:12 PM Thread Starter
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Thanks for sharing all these posts/info guys! Im currently waiting on some quotes/parts from Phil but should get started with all of this soon. I bet this is helping a lot of other people/lurkers as well on the boards!
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post #100 of 233 (permalink) Old 06-04-2012, 10:44 AM
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I'd be quite confortable with 2 8's on a street car, FWIW... 1 8" for a track car...


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