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Author
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Topic: Piston Rings....AND...will B-cam work?
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z pyro
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Member # 3745
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posted
 
 
What sizes should the piston rings on a stock 5.0 piston be? I'm rebuilding an engine, and I don't know if I got the right size rings. I ordered the 5/64" top+second rings 3/16" bottom. Is this the right size? Measuring the rings on the pistons right now (old ones), they're smaller than both 5/64" and 1/16" (the only sizes available).
Also, would a B-303 cam work for my application? Stock everything, speed density, AOD, peg-leg 7.5" rear w/ 2.73 gears (i know i know ![[Roll Eyes]](rolleyes.gif) ). I've heard both yes and no, and frankly, it's getting pretty anoyying.
[ February 17, 2004, 05:20 PM: Message edited by: zpyro35 ]
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'95 Integra LS
'08 Buell XB12R Firebolt
'65 Mustang 289 - soon to be 306
Posts: 1732 | From: Fresno, CA | Registered: Nov 2003
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NvrGoFullRetard
CAFords OG
Member # 1633
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posted
im not sure about the rings but if u want i have a b cam for sale,its only has 20 miles on it.$80
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"formally 4.6 eatin gm's"
white 97gt n/a 320rwhp/325rwtq
01 sierra rcsb lsx 408 (murdered out)
03 ecsb sierra 6.0 on 22's
2011 Tahoe
Posts: 2759 | From: PITTSBURG/FAIRFIELD | Registered: Aug 2002
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Fostang
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Member # 3752
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posted
speed density with a cam never a good idea.
Speed density regulates it self through the use of vacuum.
Performance cams tend to lower the vacuum.
What some people have done is use a vacuum pump driven through their belt to help up the vacuum reading back to the normal 18 or so where as the B cam brings it down to 12.
What it will do is make it run rich and fluctuate the idle.
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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z pyro
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Member # 3745
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posted
well I got my summit order today, and the rings are too big (5/64"). I called summit and they set me up with the right rings. Damn metric system, what was Ford thinking...
damn, looks like I'm stuck switching to mass air ![[Mad]](mad.gif)
[ February 17, 2004, 08:39 PM: Message edited by: zpyro35 ]
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'95 Integra LS
'08 Buell XB12R Firebolt
'65 Mustang 289 - soon to be 306
Posts: 1732 | From: Fresno, CA | Registered: Nov 2003
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silverLX
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Member # 3207
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posted
yep, the rings are metric, 1.5 for the 2 top grooves, 4.0mm for the bottom oil ring. I would try the cam before switching to mass air, all speed density cars act differntly with cams, some run great and some run like crap.
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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