Comp XE or XE-R cam
12-02-2002, 08:41 PM
#1
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Comp XE or XE-R cam Guys, I just got my cam today and discovered by the chart on Raughammers page that it is indeed a regular xe grind and not an xe-r (grind # 3715R/3715R). The cam is a 224/224 110lsa, 106 intake centerline, 565/565 lift that was requested to be put on xe-r lobes. My question to you is do you think it is worth it to send it back and get it ground on xe-r lobes? Do you think that xe-r lobes will make a ton more power then xe lobes.
12-03-2002, 10:44 AM
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Re: Comp XE or XE-R cam </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by r8ls1:
<strong>I got an XE too , 3715 grind . I also wondered how much difference it would make vs an XE-R .
Raughammer went 10.8 with the C1 ( XE 566' 222 ) and 10.6 with C2 (XE-R 581' 224 ) . 2 tenths gain , but the C2 also has more lift and duration . So it would seem an XE-R vs XE with identical lift , duration and LSA , would only be a tenth quicker , if that . Thats assuming his car did a perfect run with the C2 .
Maybe Raughammer can chime in .
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
<strong>I got an XE too , 3715 grind . I also wondered how much difference it would make vs an XE-R .
Raughammer went 10.8 with the C1 ( XE 566' 222 ) and 10.6 with C2 (XE-R 581' 224 ) . 2 tenths gain , but the C2 also has more lift and duration . So it would seem an XE-R vs XE with identical lift , duration and LSA , would only be a tenth quicker , if that . Thats assuming his car did a perfect run with the C2 .
Maybe Raughammer can chime in .
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
12-03-2002, 10:46 AM
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Re: Comp XE or XE-R cam </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by r8ls1:
<strong>I got an XE too , 3715 grind . I also wondered how much difference it would make vs an XE-R .
Raughammer went 10.8 with the C1 ( XE 566' 222 ) and 10.6 with C2 (XE-R 581' 224 ) . 2 tenths gain , but the C2 also has more lift and duration . So it would seem an XE-R vs XE with identical lift , duration and LSA , would only be a tenth quicker , if that . Thats assuming his car did a perfect run with the C2 .
Maybe Raughammer can chime in .
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That is not an accurate way to compare the difference between XE and XE-R lobes. And I doubt the cam can be reground without changing the base circle becuase of the lift difference.
<strong>I got an XE too , 3715 grind . I also wondered how much difference it would make vs an XE-R .
Raughammer went 10.8 with the C1 ( XE 566' 222 ) and 10.6 with C2 (XE-R 581' 224 ) . 2 tenths gain , but the C2 also has more lift and duration . So it would seem an XE-R vs XE with identical lift , duration and LSA , would only be a tenth quicker , if that . Thats assuming his car did a perfect run with the C2 .
Maybe Raughammer can chime in .
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That is not an accurate way to compare the difference between XE and XE-R lobes. And I doubt the cam can be reground without changing the base circle becuase of the lift difference.
12-03-2002, 11:06 AM
#4
Re: Comp XE or XE-R cam Daily,
I've talked with Comp before on this same issue.
Comp doesn't not offer an XE-R lobe with .568 lift. Despite what you may have been told, Comp doesn't not have XE-R grinds with less than .581 lift.
If you want to create a new master pattern and have Comp CREATE a whole new profile for you then you can get whatever you spec out. This will require a MASTER fee. The master fee is $300 to $500 depending on what you work out with Comp. This is just for the pattern development. The actual cam IS NOT included in the mastering cost.
I think:
With a good set of ported heads there will be a difference in the power of a 224 XE vs a 224 XE-R.
With stock heads there won't be much if any difference in a 224 XE vs 224 XE-R.
Hope this helps.
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<small>[ December 03, 2002, 11:09 AM: Message edited by: 99 Black Bird T/A ]</small>
I've talked with Comp before on this same issue.
Comp doesn't not offer an XE-R lobe with .568 lift. Despite what you may have been told, Comp doesn't not have XE-R grinds with less than .581 lift.
If you want to create a new master pattern and have Comp CREATE a whole new profile for you then you can get whatever you spec out. This will require a MASTER fee. The master fee is $300 to $500 depending on what you work out with Comp. This is just for the pattern development. The actual cam IS NOT included in the mastering cost.
I think:
With a good set of ported heads there will be a difference in the power of a 224 XE vs a 224 XE-R.
With stock heads there won't be much if any difference in a 224 XE vs 224 XE-R.
Hope this helps.
<img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<small>[ December 03, 2002, 11:09 AM: Message edited by: 99 Black Bird T/A ]</small>
