Optimal Ring Package
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The oil tank is 6" or 9" in diameter (round) and 16-24" tall. It requires a little room on one direction for the lines, And it needs either a breather on top or a line to a breather tank. I don't think most trunks have that much vertical room, nor does their seem to be that much space behind a front wheel well.
Typically, the return lines I've seen (and use) are AN16, which are rather big to route through a full trim passenger car.
This is a Peterson tank with built-in filter and breathers:
Typically, the return lines I've seen (and use) are AN16, which are rather big to route through a full trim passenger car.
This is a Peterson tank with built-in filter and breathers:
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Some LS7 Info Their rings are a 1.2mm (.047") top moly top ring, 1.2mm second ring, 2mm "lower tension" oil ring. they have an accumulator groove between the top and second ring.
These are smaller rings than any of the off the shelf LS1 pistons, to the best of my knowledge.
GM says "The three-piece oil control ring is 2.0 mm thick and is made of nitrided steel for superior wear control and spring force longevity. Nitriding also enables lower ring tension resulting in more power due to reduced friction." Could someone say why nitriding (a surface hardening treatment) enables lower ring tension and whether aftermarket rings have a similar treatment.
These are smaller rings than any of the off the shelf LS1 pistons, to the best of my knowledge.
GM says "The three-piece oil control ring is 2.0 mm thick and is made of nitrided steel for superior wear control and spring force longevity. Nitriding also enables lower ring tension resulting in more power due to reduced friction." Could someone say why nitriding (a surface hardening treatment) enables lower ring tension and whether aftermarket rings have a similar treatment.
FormerVendor
Joined: Nov 2001
Posts: 3,065
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From: Houston, Tx.
I don't get that one either? The dry sump allow a little lower ring tension but I don't think the LS7 system is pulling any vacuum really.
Originally Posted by DavidNJ
Their rings are a 1.2mm (.047") top moly top ring, 1.2mm second ring, 2mm "lower tension" oil ring. they have an accumulator groove between the top and second ring.
These are smaller rings than any of the off the shelf LS1 pistons, to the best of my knowledge.
GM says "The three-piece oil control ring is 2.0 mm thick and is made of nitrided steel for superior wear control and spring force longevity. Nitriding also enables lower ring tension resulting in more power due to reduced friction." Could someone say why nitriding (a surface hardening treatment) enables lower ring tension and whether aftermarket rings have a similar treatment.
These are smaller rings than any of the off the shelf LS1 pistons, to the best of my knowledge.
GM says "The three-piece oil control ring is 2.0 mm thick and is made of nitrided steel for superior wear control and spring force longevity. Nitriding also enables lower ring tension resulting in more power due to reduced friction." Could someone say why nitriding (a surface hardening treatment) enables lower ring tension and whether aftermarket rings have a similar treatment.
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However, they did move the ring size down into the .043 range. And started use the shorted 2.5" pin.
The question may be what their idea of lower tension is. What oil ring tension do you use on small ring, low friction, street engines? Do you use 9-12# tension oil rings?
The question may be what their idea of lower tension is. What oil ring tension do you use on small ring, low friction, street engines? Do you use 9-12# tension oil rings?
FormerVendor
Joined: Nov 2001
Posts: 3,065
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From: Houston, Tx.
Originally Posted by DavidNJ
However, they did move the ring size down into the .043 range. And started use the shorted 2.5" pin.
The question may be what their idea of lower tension is. What oil ring tension do you use on small ring, low friction, street engines? Do you use 9-12# tension oil rings?
The question may be what their idea of lower tension is. What oil ring tension do you use on small ring, low friction, street engines? Do you use 9-12# tension oil rings?
FormerVendor
Joined: Nov 2001
Posts: 3,065
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From: Houston, Tx.
Depends on usages and quality of the rings and their position. Tighter is better if it is possible and they don't stick for super high rpm. Great rings with the right coatings and the right oil and piston ring lands can be run pretty tight and you will pick up hp at super high rpm. Rings floating just like valvetrain is a problem at 10,000-20,000 rpm!
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