Re: XE274 cam 340. Do I need to machine the heads?
[Re: AdamR]
#76072
06/19/08 07:31 PM
06/19/08 07:31 PM
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Anonymous
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Quote:
The recommended springs for the cam are double springs which will require machining to make them fit.
recomended yes.. but i'm sure theres a single spring that will do the job.
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Re: XE274 cam 340. Do I need to machine the heads?
[Re: David Lee]
#76075
06/19/08 07:55 PM
06/19/08 07:55 PM
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Joined: Jan 2003
Posts: 7,978 Bethel Ct
AdamR
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I agree, thats not that big of cam, let me check what springs I run on my stocker and get back to you
It may not be big but its got fast ramps. Dont try and out think the engineers who designed it. If you dont use there recommended parts dont expect help when you have a problem.
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Re: XE274 cam 340. Do I need to machine the heads?
[Re: AdamR]
#76076
06/19/08 07:57 PM
06/19/08 07:57 PM
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what problems exactly? + FYI.. engineers arn't always the brightest pee in the POD.
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Re: XE274 cam 340. Do I need to machine the heads?
#76077
06/19/08 11:43 PM
06/19/08 11:43 PM
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Joined: Apr 2005
Posts: 12,271 Overpriced Housing Central
RobX4406
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IMO, depends on how hard you plan on turning it. If you don't plan on anything over 5500, then a stout single spring will work. Running it to the max RPM, put the double 995 spring on it. I just ran into this very decision. I have 3 choices, 484, XE274, XE275HL. The first two you could get away with a stout single and run it easy. Plan on turning it 6K+, a single may control it, but why chance it. Brian at IMM and I had a pretty lengthy talk about this. He had nothing to gain from going either way and strongly suggested the double spring set up. Machine the heads, drop on a locator and you have one less potential issue to worry about. Do it once, do it right! I'd guess about $100 for cutting the guide/spring seats and locators.
Last edited by RobX4406; 06/19/08 11:45 PM.
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Re: XE274 cam 340. Do I need to machine the heads?
[Re: dustergirl340]
#76079
06/20/08 09:40 AM
06/20/08 09:40 AM
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Joined: Jun 2004
Posts: 6,780 Alabama
Mopar-Al
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Quote:
My 340 has a XE274.
$120 at my machine shop a couple years ago. Worth it for peace of mind, plus I regularly turn it to 6,200 rpm at the track, when it stops pulling. If I had to baby it because of the springs that would take a lot of fun out of it, lol. My opinion, I would do it and not worry about it anymore.
I thought the 274 xe was good to rev up to 5800. You sure your still making power at 6200?
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Re: XE274 cam 340. Do I need to machine the heads?
[Re: Mopar-Al]
#76081
06/20/08 09:59 AM
06/20/08 09:59 AM
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Joined: Jan 2003
Posts: 7,978 Bethel Ct
AdamR
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Quote:
I thought the 274 xe was good to rev up to 5800. You sure your still making power at 6200?
Thats a general guideline. Every combo will be different.
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Re: XE274 cam 340. Do I need to machine the heads?
#76082
06/20/08 10:37 AM
06/20/08 10:37 AM
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Joined: Jan 2003
Posts: 6,816 Alton, IL
Dakota_Don
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Quote:
what problems exactly? + FYI.. engineers arn't always the brightest pee in the POD.
you said that right,
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Re: XE274 cam 340. Do I need to machine the heads?
[Re: Dakota_Don]
#76083
06/20/08 12:35 PM
06/20/08 12:35 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
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Comp likes lots of pressure on thier lobes. It's for a reason, and ropm is only part of it. The XE268 is fine with singles. Anything larger should have double springs. Saying "I did it and it worked" is as good as claiming the engineers are clueless. Why put in a cam you can't make use of because the springs and rpoer setup are too much $$? Cutting the guide tops and spring seats as part of a valve job is usually a metter of $100-150. If they have to pull them apart, do it, wash it, and replace the seals, and assemble, it will be more. And, expect to get the retainers and locks to match teh spring. Again, there's one right way, and million other ways that might work.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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