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Author
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Topic: Holley pump cams ???
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MAV
Gearhead Posts: 209
From: Macon,Georgia, U.S.A.
Registered: Mar 2002
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posted 09-04-2003 06:35 PM
   
While tuning my 2 holley 450`s (tunnel ram)
I have been working on a slight lean condition that happens when accelorating from cruising speeds. The engine has a hesitation which it quickly recovers from. I have increased the squirter size all the way to #37`s and that has helped some, but now I want to try a different pump cam. The stock cams are red and are at the #1 setting. which cam (color) do you guys think I should try first? All responses are appreciated. ------------------
http://maverickgrabber.iwarp.com
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 09-09-2003 10:42 PM
Pink cams,Make sure they squirt at the slightest movement of the throttle. Also check your timing curve or lock it out, more initial timing will help. Good luck, SteveW
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MAV
Gearhead Posts: 209
From: Macon,Georgia, U.S.A.
Registered: Mar 2002
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posted 09-09-2003 11:03 PM
Thanks alot Steve, I was starting to think I would`nt get a response to my rather hard to nail down question  I have installed a set of the light green cams and it helped quite a bit. I will now follow your advice and let everyone know how it works out. ------------------
http://maverickgrabber.iwarp.com
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steve'66
Gearhead Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 09-10-2003 12:25 AM
Mav,OK, but just keep in mind I'm guessing.  Pink cams worked for me a couple years ago though. SteveW
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Tbird
Gearhead Posts: 298
From: USA
Registered: May 2003
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posted 09-10-2003 07:48 AM
As suggested by Holley in their tech section, you might want to get a pump cam assortment and lay them side by side and see what the difference is between each one and how it affects the way the pump shot is dispersed.http://www.holley.com/HiOctn/TechServ/TechInfo/TI-221.html
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