blue99fbody

iTrader: (5)

I'm assembling my motor and about to file fit my rings and need to know the ring gap recommended for a 300 shot. I've been told .024 top and .026 2nd does this sound right for 4.010 weisco pistons and steel top ring

blue99fbody

iTrader: (5)

anybody?

WE TODD DID

iTrader: (2)

I'd do .028/.030.

blue99fbody

iTrader: (5)

thats about what my calculations with the sheet wiseco sent with the rings said. that says race only though, will that gap be to much for a street car that gets run na 75% of the time?

WE TODD DID

iTrader: (2)

When you spray it, the rings expand and could butt together, which will break them. If you plan on spraying that much on it, it needs a large gap. There will be no adverse affects of a larger gap.

Randy WS6

iTrader: (69)

What brand & type rings are they ? See i use Total Seal nitrous rings and the top ring is steel, not cast or ductile. And the top ring gaps .055" & .028"on the second ring for a 300 shot. I know it sound large for a gap,But i called Total Seal and they said that the steel ring will expand a lot more ,and that why they want so big of a gap. So you need to check with the rings manufacturer to see what the true gap will be for your setup.I drive mine on the street, and dont have much blow by at all.

blue99fbody

iTrader: (5)

everything i have read or been told says to go bigger on the 2nd ring. i will be going .028 .030 most likely

WE TODD DID

iTrader: (2)

Second ring gap needs to be larger then the first. It helps with overall ring seal. And the top gap definitely doesn't need to be that large.

lca1971

I use .045 to .050 on the top ring and add .004 to .006 on the second.

dnkynrbk

iTrader: (34)

Just make sure when you do get the motor in that you have PCV catch can set up on the engine. By the way I have my rings gapped as Todd said. for a 300 shot and I do get alot of blow thru driving the car around.

hymey

mine are .024/.028 at first it breathed a little but rings are bed in now and no blow by at all, blow by has more to do with bore to ring seal then ring gap, it has to have a good bore finish and the ring needs to bed in nicely if this occurs then rings will seal with little blow by even with a larger gap(just look at a 2 stroke ring gap),. Its proven time and time again. Obviously it will leak down more on a static test but once the motor is full temp and operational those figures will alter as the ring temp increases and piston to bore clearance reduces, the ring gap will reduce A LOT on the spray as with piston clearance so blow by will be minimal, better off going larger on the second for sure. Follow ring manufacturer instructions.

brandoz28

iTrader: (3)

remember you're using 2 different materials, with different requirements for ring gap. the steel top will expand more then the 2nd ring, so even though the spec appears bigger, under actually running conditions it should be fine. and again if that's what the mfg recommends, follow their instructions

blue99fbody

iTrader: (5)

i went .028 .030 thanks guys

Randy WS6

iTrader: (69)

I know what you mean , The second ring should have a larger ring gap, so it can get the bypass from the top ring to expand the second ring to seal, But the rings are a special ordered from Total Seal and are nitrous & blower ring and are made of steel ,not ductile or cast or molly. Like i said i called Total seal on the ring gap on the top ring, cause it blowed my mine when i seen the large gap.055" on the top ring, And they said the special top ring requires the large gap because of the growth or expansion of the steel, The ring are not off the shelf rings and cost me $285.00 ,And Ive been running this motor for four years now and still has perfect compression. Im starting a new build with the LS3 block and i will use the Total Seal rings.

brandoz28

iTrader: (3)

this is EXACTLY what i was talking about