step ONE
if the bores not concentric, and bore walls parallel and the bore surface consistent in its surface Finish or if you had the bore honed without the use of torque plates simulating a cylinder heads bolted in place, the rings WILL NOT SEAL as effectively , as they would if you had prepped the bores correctly or won,t seal effectively at all.
BEFORE you select any piston rings for any application, you obviously must know your bore diameter, and piston ring groove sizes, so check with the manufacturer to verify they will work in YOUR application,some of the 1/16" top compression rings are designed for limited mileage and race use , where they are replaced fairly regularly, thats certainly not true of all 1/16" rings but its potentially an issue on a street driven car.
be aware that rings have a top and bottom side , and must be installed with the proper side facing the top of the piston, and rings require a certain back and end gap clearance.
http://garage.grumpysperformance.co...gine-project-dart-shp.3814/page-12#post-17457
READ THE LINKS BELOW
viewtopic.php?f=51&t=588&p=4946&hilit=honing+plate#p4946
http://www.totalseal.com/pdf/ts_rings_article.pdf
http://www.kb-silvolite.com/news.php?ac ... ad&N_id=27
http://www.connectingrods.net/connectin ... tretch.php
viewtopic.php?f=53&t=1797&p=7233&hilit=cleaning+piston+groove#p7233
viewtopic.php?f=53&t=3759
http://www.dartheadstv.com/video_detail.php?mId=13335
http://www.enginebuildermag.com/Article ... _know.aspx
http://www.aa1car.com/library/honing98.htm
http://www.circletrack.com/techarticles ... ation.html
viewtopic.php?f=53&t=1797&p=4586#p4586
http://www.rosspistons.com/information/index.php
http://www.enginebuildermag.com/Article ... ishes.aspx
http://www.enginebuildermag.com/Article ... inish.aspx
http://www.aa1car.com/library/ar293.htm
http://www.enginebuildermag.com/Article ... ishes.aspx
http://www.enginebuildermag.com/Article ... rings.aspx
http://www.hastingsmfg.com/ServiceTips/ ... mendat.htm
http://www.stockcarracing.com/techartic ... index.html
http://www.circletrack.com/howto/4639_m ... index.html
http://www.carcraft.com/techarticles/pi ... index.html
http://www.enginebuildermag.com/Article ... oning.aspx
http://www.enginebuildermag.com/Article ... shing.aspx
http://www.stockcarracing.com/techartic ... index.html
piston rings move both in and out of the piston grooves and rotate as the piston moves thru its 360 degree rotation, keep in mind its the ring groove SPACING, and gap indexing and relationship to the rings, that is designed to minimize the loss of cylinder pressure thru the ring gaps, thats key, here, not where the gaps are exactly located , because the fact is that piston rings do tend to rotate in the piston groves in most engines, and its rare to find the ring gaps in the same location once the engines been run for several hours. Id also point out that failure to have the bore honed with the correct deck plates tends to reduce the ring seal. in fact having the rings rotate in the piston grooves tends to reduce bore wear, and keep the grooves clearance free from carbon build up
if you have oil ring expanders with the plastic bits,they are there to prevent you from over lapping the ends of the oil ring expander, theres some oil ring expander s that are vertical ,some horizontal, but all have the ends butt , none over-lap
BTW GAPLESS PISTON RINGS HAVE TWO PIECES THAT EACH MUST BE GAPPED< THE IDEA IS THAT THE TWO GAPS IN THE SET ARE ON OPPOSITE SIDES OF THE PISTON GROOVE
IVE used the TOTAL SEAL GAPLESS RINGS in a few engines Ive yet to see any huge improvement over standard rings in either durability or power produced
gapless ring
install gapless rings with the wrong side facing up and youll have an oil burning disaster (yeah! Ive got friends that never read instructions too!)
BTW GAPLESS PISTON RINGS HAVE TWO PIECES THAT EACH MUST BE GAPPED< THE IDEA IS THAT THE TWO GAPS IN THE SET ARE ON OPPOSITE SIDES OF THE PISTON GROOVE
your going to need decent feeler gauges
now years ago, we were instructed to leave the second ring gap at a tighter .004 per inch of bore with the upper top ring having the larger end gap due to the higher heat levels, it operates under ,well extensive testing in recent years shows that
(1)the second ring gap needs to be larger because if significant cylinder pressure builds between the top and lower ring the upper ring seal is quickly lost
(2)theres very little cylinder pressure lost thru the ring gaps in the thousandths of a second the rings are compressing the fuel/air mix, or during the power stroke, because most of the blow by, is the result of less than effective ring to cylinder wall seal
(3) ring seal is destroyed if the ring gap allows the rings to contact, or the rings butting destroys the piston lands
(4) ring gaps up to about .045 have very little effect on blow by or oil use
http://www.kb-silvolite.com/article.php ... ad&A_id=64
Application
Bore x
High-Performance Street / Strip
.0045â€Top Ring
.0055â€2nd Ring
Street-Moderate Turbo / Nitrous
.0050â€Top Ring
.0055â€2nd Ring
Late Model Stock
.0050â€Top Ring
.0055â€2nd Ring
Circle Track/Drag Race
.0055â€Top Ring
.0060â€2nd Ring
Blown Race Only
.0065â€Top Ring
.0070â€2nd Ring
Nitrous Race Only
.0070â€Top Ring
.0075â€2nd Ring
types of piston dome configurations
btw heres typical detonation damage, and in this case, resulting from a bit of nitrous, that boosted the pressure, but the results would be similar on a high compression engine subjected to crappy fuel and high loads at high rpms without nitrous, notice the sugary/frosted appearance and rounded edges of the melted areas
damage to the ring lands can be caused by detonation or just the ring gaps set too tightly, if the piston shows no frosted appearance its usually the ring gaps too small, or excessive heat, to lean a mix, to much ignition advance,etc.
if the bores not concentric, and bore walls parallel and the bore surface consistent in its surface Finish or if you had the bore honed without the use of torque plates simulating a cylinder heads bolted in place, the rings WILL NOT SEAL as effectively , as they would if you had prepped the bores correctly or won,t seal effectively at all.
BEFORE you select any piston rings for any application, you obviously must know your bore diameter, and piston ring groove sizes, so check with the manufacturer to verify they will work in YOUR application,some of the 1/16" top compression rings are designed for limited mileage and race use , where they are replaced fairly regularly, thats certainly not true of all 1/16" rings but its potentially an issue on a street driven car.
be aware that rings have a top and bottom side , and must be installed with the proper side facing the top of the piston, and rings require a certain back and end gap clearance.
assembling and installing connecting rods/pistons
look closely at the connecting rods one edge of the main bearing are is beveled noticeably more than the other that beveled side faces away from the rod its paired with because it matches the slight radiased bevel of the crank journal many builder class pistons are designed to go in, in either...
garage.grumpysperformance.com
Another rings end gap question
Hi, I'm rebuilding my 4.3L Vortec from 2003 Chevy Astro Cargo Van. When I bought it a year ago it had ~26.000 miles. The engine was knocking and I couldn't get rid of that annoying sound - tried to clean up lifters through the push roads and by "seafoaming". It didn't work out, so I just...
garage.grumpysperformance.com
resistance to rotation, of crank durring short blk assembly
Ok youve just installed your crankshaft in the engine block, with new main bearings and everything's well coated with assembly lube,and oil, and youve torqued down the main caps to spec. in at least three stages, and then gone back and rechecked the studs or bolts per the manufacturers...
garage.grumpysperformance.com
Made a mistake filing rings, still good?
First I want to thank Grumpy for his help on many forums and him maintaining this one. It's an absolute WEALTH of info. So.... I am assembling an essentially stock 350. For use in a daily driver 95 Tahoe with TBI. I'm using a .030 over eagle rotating kit and a hydraulic roller cam out of an...
garage.grumpysperformance.com
getting the correct piston to bore clearance, on your block
always think every step you take in any performance engine build through, logically and don't just jump off the dock head first, financially, without asking detailed questions , and documenting as much as you can in writing, and having a well thought through plan, parts list and time frame...
garage.grumpysperformance.com
maximizing piston to bore ring seal
From the February, 2009 issue of Circle Track By Jeff Huneycutt Piston Ring Prep It can be a hassle filing... read full caption Piston Ring Prep It can be a hassle filing three sets of rings per cylinder, but when done correctly the results can mean more power and less fall-off before the...
garage.grumpysperformance.com
installing rings in piston grooves
obviously if you've been around engine rebuilds, long enough, your aware that you'll eventually see guys installing rings in piston grooves by spiral twisting them into place, like the picture below depicts, AND YES YOU MIGHT NOT EVEN REALIZE THAT THE RING HAS BEEN SLIGHTLY DISTORTED...
garage.grumpysperformance.com
cleaning piston ring grooves, and related info
now if there's any job that's frequently ignored or avoided during an engine rebuild , its more than likely ,cleaning pistons and cleaning the grooves its high on the list! RELATED INFO (take advantage of millions of hours of previous engine builds, by skilled and experienced people, and the...
garage.grumpysperformance.com
crankshaft and connecting rod compatability
POSTED BY, navygunner08; "Does it matter what length rod you use with a particular crank? So if a crank is listed for use with 5.7" rods, can you use a 6" rod without modifications? And vise versa? " one factor to keep in mind is that rods typically have a side that rides against its matched...
garage.grumpysperformance.com
how piston ring groove depth & clearance effects ring seal
the job of the rings is to provide a high pressure gas tight seal preventing pressure in the combustion chamber during the compression, exhaust and power strokes above the piston from leaking past the rings and piston, the combination of slight inertial loads friction and pressure above the...
garage.grumpysperformance.com
http://garage.grumpysperformance.co...gine-project-dart-shp.3814/page-12#post-17457
READ THE LINKS BELOW
viewtopic.php?f=51&t=588&p=4946&hilit=honing+plate#p4946
http://www.totalseal.com/pdf/ts_rings_article.pdf
http://www.kb-silvolite.com/news.php?ac ... ad&N_id=27
http://www.connectingrods.net/connectin ... tretch.php
viewtopic.php?f=53&t=1797&p=7233&hilit=cleaning+piston+groove#p7233
viewtopic.php?f=53&t=3759
http://www.dartheadstv.com/video_detail.php?mId=13335
http://www.enginebuildermag.com/Article ... _know.aspx
http://www.aa1car.com/library/honing98.htm
http://www.circletrack.com/techarticles ... ation.html
viewtopic.php?f=53&t=1797&p=4586#p4586
http://www.rosspistons.com/information/index.php
http://www.enginebuildermag.com/Article ... ishes.aspx
http://www.enginebuildermag.com/Article ... inish.aspx
http://www.aa1car.com/library/ar293.htm
http://www.enginebuildermag.com/Article ... ishes.aspx
http://www.enginebuildermag.com/Article ... rings.aspx
http://www.hastingsmfg.com/ServiceTips/ ... mendat.htm
http://www.stockcarracing.com/techartic ... index.html
http://www.circletrack.com/howto/4639_m ... index.html
http://www.carcraft.com/techarticles/pi ... index.html
http://www.enginebuildermag.com/Article ... oning.aspx
http://www.enginebuildermag.com/Article ... shing.aspx
http://www.stockcarracing.com/techartic ... index.html
piston rings move both in and out of the piston grooves and rotate as the piston moves thru its 360 degree rotation, keep in mind its the ring groove SPACING, and gap indexing and relationship to the rings, that is designed to minimize the loss of cylinder pressure thru the ring gaps, thats key, here, not where the gaps are exactly located , because the fact is that piston rings do tend to rotate in the piston groves in most engines, and its rare to find the ring gaps in the same location once the engines been run for several hours. Id also point out that failure to have the bore honed with the correct deck plates tends to reduce the ring seal. in fact having the rings rotate in the piston grooves tends to reduce bore wear, and keep the grooves clearance free from carbon build up
if you have oil ring expanders with the plastic bits,they are there to prevent you from over lapping the ends of the oil ring expander, theres some oil ring expander s that are vertical ,some horizontal, but all have the ends butt , none over-lap
BTW GAPLESS PISTON RINGS HAVE TWO PIECES THAT EACH MUST BE GAPPED< THE IDEA IS THAT THE TWO GAPS IN THE SET ARE ON OPPOSITE SIDES OF THE PISTON GROOVE
IVE used the TOTAL SEAL GAPLESS RINGS in a few engines Ive yet to see any huge improvement over standard rings in either durability or power produced
gapless ring
install gapless rings with the wrong side facing up and youll have an oil burning disaster (yeah! Ive got friends that never read instructions too!)
BTW GAPLESS PISTON RINGS HAVE TWO PIECES THAT EACH MUST BE GAPPED< THE IDEA IS THAT THE TWO GAPS IN THE SET ARE ON OPPOSITE SIDES OF THE PISTON GROOVE
your going to need decent feeler gauges
now years ago, we were instructed to leave the second ring gap at a tighter .004 per inch of bore with the upper top ring having the larger end gap due to the higher heat levels, it operates under ,well extensive testing in recent years shows that
(1)the second ring gap needs to be larger because if significant cylinder pressure builds between the top and lower ring the upper ring seal is quickly lost
(2)theres very little cylinder pressure lost thru the ring gaps in the thousandths of a second the rings are compressing the fuel/air mix, or during the power stroke, because most of the blow by, is the result of less than effective ring to cylinder wall seal
(3) ring seal is destroyed if the ring gap allows the rings to contact, or the rings butting destroys the piston lands
(4) ring gaps up to about .045 have very little effect on blow by or oil use
http://www.kb-silvolite.com/article.php ... ad&A_id=64
Application
Bore x
High-Performance Street / Strip
.0045â€Top Ring
.0055â€2nd Ring
Street-Moderate Turbo / Nitrous
.0050â€Top Ring
.0055â€2nd Ring
Late Model Stock
.0050â€Top Ring
.0055â€2nd Ring
Circle Track/Drag Race
.0055â€Top Ring
.0060â€2nd Ring
Blown Race Only
.0065â€Top Ring
.0070â€2nd Ring
Nitrous Race Only
.0070â€Top Ring
.0075â€2nd Ring
types of piston dome configurations
btw heres typical detonation damage, and in this case, resulting from a bit of nitrous, that boosted the pressure, but the results would be similar on a high compression engine subjected to crappy fuel and high loads at high rpms without nitrous, notice the sugary/frosted appearance and rounded edges of the melted areas
damage to the ring lands can be caused by detonation or just the ring gaps set too tightly, if the piston shows no frosted appearance its usually the ring gaps too small, or excessive heat, to lean a mix, to much ignition advance,etc.
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