When an aluminum block grows
#2663884
06/08/19 11:19 PM
06/08/19 11:19 PM
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Joined: Jun 2016
Posts: 911 Washington
hemienvy
OP
super stock
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OP
super stock
Joined: Jun 2016
Posts: 911
Washington
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Say it grows .012" when warm. Does that push the cylinder liners up in their bores .012" as well, so that the head gasket seal is unaffected ?
Part II: If the aluminum grows at a different rate then the iron liners, which it does, how can an all-metal MLS gasket possibly work ( in this application) ?
Last edited by hemienvy; 06/08/19 11:46 PM. Reason: added material.
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Re: When an aluminum block grows
[Re: Airwoofer]
#2663923
06/09/19 05:00 AM
06/09/19 05:00 AM
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Joined: Mar 2005
Posts: 1,581 N/E, Michigan
RATTRAP
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
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The correct terminology is (CTE) Coefficient Thermal Expansion of a given material.
The Steel will grow just over 1/2 the rate of the Aluminum depending on the composition of the material involved. One has to remember the material is growing in all directions not just one.
Last edited by RATTRAP; 06/09/19 05:02 AM.
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Re: When an aluminum block grows
[Re: RATTRAP]
#2664026
06/09/19 01:28 PM
06/09/19 01:28 PM
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Joined: Jan 2003
Posts: 2,937 A shed in England
Tig
master
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master
Joined: Jan 2003
Posts: 2,937
A shed in England
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Lash on our 580 opens by 12 thou when warm (ali block ali head). With 1.6 rocker arms thats only 7 1/2 thou in total (roughly). It was only 6 thou with an iron block, ali head.
'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: When an aluminum block grows
[Re: Cab_Burge]
#2664214
06/10/19 12:02 AM
06/10/19 12:02 AM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
master
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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All my sleeves are between. 002, and .003 above the deck too. My stuff grows from zero lash to around .025 to .03 if it gets stupid hot. I set up at zero lash cold most times.
As for sealing, i use copper coat on everything. Cometics are amazing, and have worked on almost everything without a single leak. I'm growing ever more fond of the sce ics titan copper. They have a stainless ring sandwiched in the copper around the bores like if the block were o ringed, and printed sealing material around the water. Im sure it's not quite as good as traditional wire o rings, but close enough for me. I've been abusing a set for a while now. Melting pistons, detonation, reusing, and they keep going. I like the heat transfer of copper, but have never liked the re torque, water leaks and being stuck with wire in the sleeves. Im building a pretty mean blown motor ( mean for a cast water block and head) so I'll see if they'll take some real pressure.
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Re: When an aluminum block grows
[Re: Cab_Burge]
#2664241
06/10/19 04:44 AM
06/10/19 04:44 AM
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Joined: Mar 2005
Posts: 1,581 N/E, Michigan
RATTRAP
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
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I have been told that aluminum grows eight times more than steel when heated Per degree F x10^-6 Aluminum = 13 Steel = 7.2
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