Re: ? many passes ? "running the valves" in your racecar?
[Re: mikemotorhead]
#369976
07/08/09 02:32 PM
07/08/09 02:32 PM
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Joined: Jan 2003
Posts: 2,933 A shed in England
Tig
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A shed in England
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Quote:
I like to change the oil every 20-25 passes and run the valves at the same time. Overkill??? Mike
About the same for oil changes. I tend to check the lash more frequently after a rebuild, like before a meeting. If you use the parts in the places they originally came from then I've found the lash settles down really quickly. Once they've settled I leave them 'till season end or 'till I break something and the pattern starts again.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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Re: ? many passes ? "running the valves" in your racecar?
[Re: mikemotorhead]
#369977
07/08/09 03:04 PM
07/08/09 03:04 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Quote:
I like to change the oil every 20-25 passes and run the valves at the same time. Overkill??? Mike
I change oil twice a season(about 55 passes maybe more per change) and I check the lash on my roller about once a year... hasnt changed
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Re: ? many passes ? "running the valves" in your racecar?
[Re: MR_P_BODY]
#369978
07/08/09 03:25 PM
07/08/09 03:25 PM
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Posts: 2,763 Walton's Mountain, Pa
Steve1118
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About the oil change interval for me, too, 20-25 runs. I admit it might be a bit excessive, but I'm anal about that, and it's worked, so why mess? I've got 15 passes on this oil, and will probably change it after the Beaver Nostalgia Nats this weekend.
As far as the valves, I go over them the beginning of the season and let it go.
"Old age and treachery trumps youth and enthusiasm, every time!" East Central Director / Chrysler Power Magazine www.reasbeckracing.webs.com
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Re: ? many passes ? "running the valves" in your racecar?
[Re: Steve1118]
#369979
07/08/09 03:27 PM
07/08/09 03:27 PM
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Joined: Jan 2004
Posts: 4,866 North of Detroit
HemiDart68
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I use brad Penn oil so i go a little longer on it. As far as valves, they are usually a first indicator of something going wrong. Ounce the valve train stabilizes they rarely move. ALot of times nothing gets adjusted, just go in and check and make sure all is good in the hood.
In God we trust, all others pay cash.
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Re: ? many passes ? "running the valves" in your racecar?
[Re: mikemotorhead]
#369980
07/08/09 03:41 PM
07/08/09 03:41 PM
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Barnstorm
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Minnesota
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Mobil 1 20-25 passes. Valve covers off to check pushrod tips,rocker alignment,oiling. Big spring pressures should be looked at,might as well check lash. SS/AH guys do it every 3-4 passes.
The little old lady from Pasadena is back!
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Re: ? many passes ? "running the valves" in your racecar?
[Re: Barnstorm]
#369981
07/08/09 03:57 PM
07/08/09 03:57 PM
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Joined: Dec 2006
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FlyFish
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I change the oil once or twice a season...but I don't get to the track as often as I would like (probably less than 40 passes on the oil). Valves, once at the begining...then again if if starts acting or sounding weird.
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: ? many passes ? "running the valves" in your racecar?
[Re: FlyFish]
#369982
07/09/09 12:36 AM
07/09/09 12:36 AM
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Al_Alguire
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Well you wanna talk anal I guess that is me. We check the lash pretty much after EVERY trip to the track. I usually run the oil for no more than 20 passes or so, never at the track but when we come back froma race and are in that area.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: ? many passes ? "running the valves" in your racecar?
[Re: Al_Alguire]
#369984
07/09/09 09:40 AM
07/09/09 09:40 AM
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Joined: Oct 2004
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BobR
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Quote:
Well you wanna talk anal I guess that is me. We check the lash pretty much after EVERY trip to the track. I usually run the oil for no more than 20 passes or so, never at the track but when we come back froma race and are in that area.
We have our valve covers off at least twice per race. A big lash on one valve means something's not right. We've caught early some pretty serious issues this way. Two races ago we had a tip come off of a titanium valve and the rocker had begun to eat into the stem. We got it before it became a BIG deal. Oil change? We take our motor apart several times per season so the oil get's changed then.
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Re: ? many passes ? "running the valves" in your racecar?
[Re: BobR]
#369985
07/09/09 11:05 AM
07/09/09 11:05 AM
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mikemotorhead
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"We take our motor apart several times per season so the oil get's changed then." HOLY SNIKEES Bob ,what motor combination do you run??? Mike
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Re: ? many passes ? "running the valves" in your racecar?
[Re: mikemotorhead]
#369986
07/09/09 12:25 PM
07/09/09 12:25 PM
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Joined: Oct 2004
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BobR
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Quote:
"We take our motor apart several times per season so the oil get's changed then." HOLY SNIKEES Bob ,what motor combination do you run??? Mike
Procharged SBF. Upwards of 2400 HP.
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Re: ? many passes ? "running the valves" in your racec
[Re: rowin4]
#369990
07/10/09 06:39 AM
07/10/09 06:39 AM
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Joined: Jan 2003
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gregsdart
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It all depends on what setup you run. Stock cam, the valve covers come off when it hits the bone yard. Proven, known solid lifter flat tappet combos, once stabilized, once a year? A radical roller, with aggressive ramps and very high spring pressures, every few passes, or if the car slows any measurable amount. Never had a catastrophic failure (whole engine lost due to valvetrain trouble) but have caught many parts going away, was able to fix and race the rest of the day.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: ? many passes ? "running the valves" in your racec
[Re: gregsdart]
#369992
07/10/09 07:55 AM
07/10/09 07:55 AM
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Posts: 3,667 Arizona
Chris'sBarracuda
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Quote:
It all depends on what setup you run. Stock cam, the valve covers come off when it hits the bone yard. Proven, known solid lifter flat tappet combos, once stabilized, once a year? A radical roller, with aggressive ramps and very high spring pressures, every few passes, or if the car slows any measurable amount. Never had a catastrophic failure (whole engine lost due to valvetrain trouble) but have caught many parts going away, was able to fix and race the rest of the day.
Couldn't have said it any better..
Except the oil change.. I guess, when I feel like it..
Chris..
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