Brought to you in part by:

.

Shop Eastwood for your Auto Restoration Needs!


  Mustangsandmore Forums
  '64 1/2 to '73 -- The Classic Mustang
  New cam, valve spring question...

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   New cam, valve spring question...
H8CHEVY
Gearhead

Posts: 276
From: Southern Cali
Registered: Jun 2000

posted 01-11-2002 04:50 PM     Click Here to See the Profile for H8CHEVY   Click Here to Email H8CHEVY     Edit/Delete Message   Reply w/Quote
Hey guys, purchased a new cam for my 302.. its the Comp cams xtreme energy series #31-234-3.256.. I have the perf rpm aluminum heads, and was wondering do I have to change the valve springs out when I put this cam in, or can I continue to run the springs that are on there? the old cam is a blue racer #wg-1107.. thanks!

IP: Logged

RagTop
Journeyman

Posts: 18
From: Pleasanton, CA, USA
Registered: Feb 2001

posted 01-11-2002 05:08 PM     Click Here to See the Profile for RagTop   Click Here to Email RagTop     Edit/Delete Message   Reply w/Quote
That all sort of depends on the specs of the new cam vs the old cam and how long you've had the present springs on there. Are they heavy duty springs? I almost lost my 302 by going to a more aggressive cam and not installing new valve springs.

------------------
Regards,
RagTop
69 Meadowlark Yellow convertible, 302(308)/4V
69 Royal Maroon SportsRoof, 351W(363)/4V
00 Pewter Camaro Z28, LS1

IP: Logged

H8CHEVY
Gearhead

Posts: 276
From: Southern Cali
Registered: Jun 2000

posted 01-11-2002 06:46 PM     Click Here to See the Profile for H8CHEVY   Click Here to Email H8CHEVY     Edit/Delete Message   Reply w/Quote
the motor has just under 10K on it.. since the rebuild and the new heads were put on it. the old cam has .448/.472 duration and the new one has .477/.484 gross lift.. thanks alot...

IP: Logged

steve'66
Gearhead

Posts: 6602
From: Sonoma,CA,USA
Registered: Mar 2000

posted 01-11-2002 06:51 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
I think your springs will be fine with the new cam.

SteveW

IP: Logged

SteveLaRiviere
Administrator

Posts: 33988
From: Saco, Maine
Registered: May 99

posted 01-11-2002 07:39 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Just be sure to doublecheck them for coil bound height.

------------------

'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC

IP: Logged

steve'66
Gearhead

Posts: 6602
From: Sonoma,CA,USA
Registered: Mar 2000

posted 01-11-2002 09:14 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by SteveLaRiviere:
Just be sure to doublecheck them for coil bound height.


In other words when the valve spring is fully compressed on a down stroke, see if you can slip a .020 feeler gauge between the coils of your valve springs. If not try different ones and let us know what will fit between the coils. I still think you'll be fine, but it doesn't hurt to check. Good luck,

SteveW

IP: Logged

H8CHEVY
Gearhead

Posts: 276
From: Southern Cali
Registered: Jun 2000

posted 01-11-2002 09:24 PM     Click Here to See the Profile for H8CHEVY   Click Here to Email H8CHEVY     Edit/Delete Message   Reply w/Quote
thanks guys ill let you know what I find this weekend...

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2003, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[About M&M][Acronyms][Calendar][Chat][Classifieds] [Members' Pics] [M&M Mug Shots]

[ Mustangsandmore.com Bookstore] [Mustangsandmore.com T-Shirts][Tech Articles]