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Author Topic:   Holley pump cams ???
MAV
Gearhead

Posts: 209
From: Macon,Georgia, U.S.A.
Registered: Mar 2002

posted 09-04-2003 06:35 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
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.

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http://maverickgrabber.iwarp.com

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steve'66
Gearhead

Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 09-09-2003 10:42 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 09-09-2003 11:03 PM     Click Here to See the Profile for MAV   Click Here to Email MAV     Edit/Delete Message   Reply w/Quote
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.

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http://maverickgrabber.iwarp.com

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steve'66
Gearhead

Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 09-10-2003 12:25 AM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
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

posted 09-10-2003 07:48 AM     Click Here to See the Profile for Tbird   Click Here to Email Tbird     Edit/Delete Message   Reply w/Quote
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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