Re: Are Comp XE Cam profiles noisy?
[Re: furyous3]
#1299504
09/07/12 09:57 PM
09/07/12 09:57 PM
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Joined: Jan 2003
Posts: 16,123 Grand Haven, MI
patrick
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I Live Here
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Grand Haven, MI
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my old 360 I put an XE262 was the opposite-- a little clackity at idle, but quiet at RPM.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Are Comp XE Cam profiles noisy?
[Re: dustergirl340]
#1299509
09/07/12 10:41 PM
09/07/12 10:41 PM
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Joined: Aug 2005
Posts: 4,799 ILL
MLR426
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master
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ILL
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XE profiles have aggressive lobe ramps and noise is common at idle and most are noisey no matter what rpm. What are your installed spring pressures open and closed ? With the 496 stroker why was a XE profile selected ? Was it cost versus a tight lash roller combo ? And no another 1/4 turn will not change anything with the lifter noise, it's all about valve train control with pressures and heavy valve trains like 3/8 heavy stem valves etc..cause control issues with aggressive cam profiles especially at higher rpm's.
MLR426
Last edited by MLR426; 09/07/12 10:47 PM.
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Re: Are Comp XE Cam profiles noisy?
[Re: MLR426]
#1299510
09/07/12 10:59 PM
09/07/12 10:59 PM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
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A gulag near you.
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Yes they are noisy , precious setting of the preload seems to work on the one I did earlier this year. If I had to do it over again I would have just used a solid . I don't think it's noisy lifter , especially since they are under preload pressure always, it more the valves slamming closed ??? The one I did also didn't use Comp lifters , first time around yes and that one started to lose a lobe , or it was just really noisy with the comp lifters that it sounded like something real bad was happening , anyway a custom Grind from Dwayne porter , maybe it didn't have as aggressive a ramp as the XE , and a set of Crower Cam saver lifters along with the time I spent setting prelaod , it was hardly noticeable last time I had my head under the hood of the car it was installed in .
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Re: Are Comp XE Cam profiles noisy?
[Re: JohnRR]
#1299511
09/07/12 11:06 PM
09/07/12 11:06 PM
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Joined: Jan 2003
Posts: 9,924 Weddington, N.C.
Streetwize
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Weddington, N.C.
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They are a bit 'clackity' in Mopars. My best guess as to why is that they are essentially a 'scaled up' .904 based on profiles obviously designed for the much more popular SBC which has Much Lighter valvetrain mass. Weigh the valves, lifters, pushrods, springs and retainers side by side and it's pretty easy to figure out where the clatter from the faster ramps is coming from.
Last edited by Streetwize; 09/07/12 11:09 PM.
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Re: Are Comp XE Cam profiles noisy?
[Re: Dakota_Don]
#1299513
09/09/12 03:11 PM
09/09/12 03:11 PM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
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Marysville, O-H-I-O
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My XE-275-HL was like a sewing machine at idle, but didn't hear any noise over the exhaust at RPM
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Re: Are Comp XE Cam profiles noisy?
[Re: screamindriver]
#1299516
09/09/12 07:26 PM
09/09/12 07:26 PM
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Joined: Oct 2005
Posts: 6,048 Back home in PA
BulletBob
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Quote:
I've measured and remeasured everything up top on the last 440 build with the XE cam and it still has a touch of valvetrain noise at hot idle...
I did the same on a XE268H in a 360 that was in my old dually a little clatter at hot idle too
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Re: Are Comp XE Cam profiles noisy?
[Re: furyous3]
#1299521
09/10/12 09:35 AM
09/10/12 09:35 AM
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Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
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Quote:
I spoke with the builder and he put @.20 (1/2 turn) on it. We used beehive springs, don't know the seat and nose pressure. I drove it all over town yesterday and on the freeway with no concerns about performance but at freeway speeds the lifter noise is kinda buzzy. At idle it seems quiet and fine, So I'll just get used to it or maybe put some cast valve covers on it to absord the noise.
Thanks for the responses.
I'm going to ASSuME that is a TYPO , a 1/2 turn wouldn't be .20, maybe .020 ....
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