Piston Ring Gap [Merged 5-7] gapping rings pistons end filing

[Enraged78]

When I installed my Ross pistons, the instruction sheet came with a formula for setting ring gap. It was something along the lines of stock gap + .001 for every 50HP over stock that you plan to run. We gapped my rings for 500HP, and added a thousandth to err on the side of safety. Having a little bit of blow-by is much better than having your ring ends touch and flutter. Besides, most people who are going this far are capping their intake manifolds and running a drilled PCV and valve cover breather to a catch can. I plan on running in the 400HP range, but you never know how much faster you want to go, and it's easier to gap bigger than go and re-ring the motor. Remember, loose is fast.

P.S. The stock gap in my factory block was actually set too close. I had shiny ends on all eight of my rings, and they had most definately fluttered (is that even a word?). This was with the car running only 18PSI on the 14b.

Matt.

 

[steve-o_95_GST]

My top ring is set at .022 and the 2nd ring is at .025. This is set for around 26 psi from a 50 trim with supporting mods

-Steve

 

[biglady112]

As per what I spoke with Ross about, I run .017 and .017 on the gaps. This is 35+psi from a 75/min turbo. These are .030" over pistons.

Steven

 

[chanley talon]

Im rebuilding my 4g63 and i need to know what the gap of the rings should be .
I have seen so many diffrent things . Do i measure the gap in inchs like .18 .22 or is it in
metric . Please specify exactly what the top ring and second ring gap should be.

Thanks WTF

 

[MuGeN]

Pistons ring end gap:


Number 1 compression ring ---- 1990 through 1992...................0.0098 to 0.0177 inch
1993 and later.........................0.0098 to 0.0157 inch

Number 2 compression ring ---- 1990 through 1992..................0.0138 to 0.0197 inch
1993 and later........................0.0177 to 0.0236 inch

Watever you choose to take metric or inch its the same. You need to have the metric spec but me i prefer to take the inch spec... Good luck for your rebuilt

 

[luvmygst]

Im rebuilding my 4g63 and i need to know what the gap of the rings should be .
I have seen so many diffrent things . Do i measure the gap in inchs like .18 .22 or is it in
metric . Please specify exactly what the top ring and second ring gap should be.

Thanks WTF

you were alost correct. I gapped my rings at .018 (upper) and .021 (lower) You read it in thousandts of an inch. You could convert this to metric, but standard feeler gauges are easier to find. I may be wrong but I went by the instructions in the ring book and it looked correct when instaled in the motor. GOod luck

 

[gotlag]

Just as a point to make for any other newbie or person doing their first rebuild, use these numbers if you are using stock replacement pistons. If you are using aftermarket forged, use their specs. As an example, if I had used these specs on my current motor with the Arias,or my motor before with the Venolias, this would have casued huge failures. Maybe his bild up is in his profile as I didn't check, but piston type should have been the first question asked in response to the post.

 

[luvmygst]

Just as a point to make for any other newbie or person doing their first rebuild, use these numbers if you are using stock replacement pistons. If you are using aftermarket forged, use their specs. As an example, if I had used these specs on my current motor with the Arias,or my motor before with the Venolias, this would have casued huge failures. Maybe his bild up is in his profile as I didn't check, but piston type should have been the first question asked in response to the post.

Good point the ring gaps I used were for stock pistons with chromoly rings. Any aftermarket piston will come with its own specs.

 

[chanley talon]

They are stock cast pistons . Thanks for the direct info.

 

[MuGeN]

Just as a point to make for any other newbie or person doing their first rebuild, use these numbers if you are using stock replacement pistons. If you are using aftermarket forged, use their specs. As an example, if I had used these specs on my current motor with the Arias,or my motor before with the Venolias, this would have casued huge failures. Maybe his bild up is in his profile as I didn't check, but piston type should have been the first question asked in response to the post.

You are right dude

 

[motoman358]

In the directions it does not say what way to have the top two compression rings in. The bottom oil ring has the upper and lower rings facing opposite directions in line with the piston pin and the center ring 90* from the pin. I currently have the two compression ring gaps 180* from each other 90* from the pin so that none of the gaps overlap, is this correct? If not please explain the correct positions of the ring gaps. thanks.

 

[Big Woo]

If looking straight ahead at piston top with exhaust valve releifs down.

Oil ring expander gap in-line with wrist pin end 3 o-clock
top and bottom oil ring rail gaps 180 degrees apart & 90 degrees from oil expander gap. 12 & 6 o-clock
second compression ring 45 degrees clockwise from the 6 o-clock position
top compression ring 45 degrees clockwise from 12 o-clock position & 180 degrees from second compression ring gap.

 

[Fast GST]

Hey guys how do I do the rings on the wiseco piston? What I mean is the rings came with instruction of how to line up the oil ring spacer and rings but not how to line up the 1st ring and 2nd ring. Do I do it like the stock pistons like it says in the shop manual? tHANKS

 

[awdtalontsi1992]

The two compression rings should have the gaps spaced 180 degrees apart. Neither of the compression ring gaps should line up with the oil ring gaps.

 

[Fast GST]

Do they have to be in a certain way of each other , and in what way

 

[Wheels-a-turnin]

Top is .020 and bottom is .019

I bought these pistons with the rings, is the top gap too wide? Or am I ok

 

[OverboostXS]

Need to find the clearence for those particular rings.. My wisecos was like .025 if i recall correctly.

 

[Wheels-a-turnin]

Im not talking about the clearance inside the groove but the end gap when rings are installed. Where the 2 ends of the ring meet. For mine .019 and .020 apart.

 

[steel_3d]

That's not right. The bottom ring gap should be a couple of thou bigger than the top. So for a .020 top gap I'd go with .023 or so on the bottom. This is to relieve the pressure between the rings, otherwise the top ring might get pushed off its land and flutter.

 

[Wheels-a-turnin]

Ya I ended up doing a .020 gap for the top ring and a .024 on the bottom ring

 

[TSI_Pimp]

Hey guys while on the subject I have a? With the piston oil ring on the wiseco are you suppose to cut it to fit in perfectly. Only reason I ask is a car friend and I are putting it together and he’s telling me they need to be cut. I put them in the cylinder and there perfect fit but he said they should not be hitting the wall. I just want to make sure before I start cutting stuff. Thanks guys

 

[TommyDSM]

I have Wiseco Pistons, and installing them Wondering about the Ring Gap Orientation. The gaps should not be on top of each other. Should be 90degree of each other correct?

 

[ITSME4G63]

I have Wiseco Pistons, and installing them Wondering about the Ring Gap Orientation. The gaps should not be on top of each other. Should be 90degree of each other correct?

I was told 180 of each other, the first oil ring facing the firewall the 2nd one facing the front the first compression ring facing the firewall and the 2nd one facing the front, bottom to top order, the machine shop I went to told me this.

 

[donmagicjuan]

Did the rings come with instructions?

http://www.dsmtuners.com/forums/showthread.php?t=212974&highlight=ring+orient*

 

[TommyDSM]

Did the rings come with instructions?

http://www.dsmtuners.com/forums/showthread.php?t=212974&highlight=ring+orient*

Machine Shop didn't give it back...