I only spin mine at 7,000 anyway. So it doesn't really apply to me that much. But I wondered about the air turbulence and if I should underdrive it just a smidge.
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Results 21 to 33 of 33
Thread: G.M. 4 blade fan?
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05-02-2012, 01:13 PM #21
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Crew Chief "Tip of the day":
Most handling problems can be solved by adjusting the screw-ball. It can be difficult to fine tune at times. Explaining yourself loudly and striking it on top of the helmet with a dead blow hammer usually works well.
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05-02-2012, 09:49 PM #22
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I forgot to mention the pulleys are 1:1. They turn the motor 7500 with no cooling problem.
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05-02-2012, 10:30 PM #23
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haha my buddy has been doing that for years. still cant get his motor over 200! you should see the looks he gets when people see it!
Originally Posted by stock car driver
Turbulence is a easy free fix...
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05-02-2012, 11:50 PM #24
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Our 8400 rpm minus 15% is about 7200 rpm...It depends upon your rpm..
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05-03-2012, 07:28 PM #25
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lol close... i think he even went down to a 15" 2 blade fan. one guy came over to his pits last year and argued with him that it cant possibly work...all while his car was overheating and my buddys car was running the 180 degrees that his t-stat opens up at!
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05-04-2012, 12:36 PM #26
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youre on the right track with the 2 blade fan. dynoman built a fan dyno just for the peurpose of testing fans and he found +50hp just by going to a 2 blade. he found another +20hp by adding a propreitary coating to the blades which decrease blade drag!
who drives the car now? not chad i take it?
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05-04-2012, 10:59 PM #27
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I went to my local dealership today and they told me it would be $170.00 for the fan. I was blown away. John 1*
"Out of every one hundred men, ten shouldn't even be there, eighty are just targets, nine are the real fighters, and we are lucky to have them, for they make the battle. Ah, but the one, one is a warrior, and he will bring the others back."
— Heraclitus
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05-05-2012, 09:51 AM #28
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John, when we were looking for a crate we tried the zephyrills
Dealer and they wanted over $7500 we ordered it from Carl Black and shipped to the shop was just over $4500 so check around!
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05-05-2012, 10:19 AM #29
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www.gmpartsdirect.com would be your best price but you'll hafta pay shipping.
i would go with the cv products fan. they some in 15 18 and 19inches.
http://www.cvproducts.com/ProdDet.aspx?PN=CV1519
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05-05-2012, 02:41 PM #30
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even better yet
http://www.amazon.com/ACDelco-15-807.../dp/B000IZ26E0
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05-07-2012, 08:30 AM #31
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2 Blade Fan
2 questions for the 2-blade fan:
- Did you get the fan balanced after you cut 2 blades off?
- Was this in a dirt track application?
Thanks.
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05-09-2012, 11:53 PM #32
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^^^^ I have the same question!
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05-10-2012, 08:34 PM #33
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I get mine on Amazon and pay $41 with shipping. Originally Posted by stock car driver
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