pistons

[natemoen]

O.K. Guys here's the deal.

Can someone measure as accurately as possible the ring groove depths on a new piston?

I have part numbers for the rings (Top, Second and Oil as well as Gapless top and rail) but Ed @ Total Seal made me promise not to release them until I could confirm the ring groove depths.

Once I get the depths (I believe they are not all the same so please measure all three) I can get them put on the computer system @ Summit Racing
and I will post them here as well as the XJ forum so we can get rings.

I will post part numbers for standard as well as the 3 oversizes.

I think I know what they are but I don't have a new piston to measure.

Thanks in Advance,

Someone was going to mail them a piston for them to measure so they could be sure of the size.

[TECHLINETOM]

Bump

Anyone?

Anyone?

Buhler?

[James England]

Could someone tell me how having the throttle wide open affects the compresion test reading please?

[crazy steve]

That's easy... to get an accurate compression test, you have to have something to compress; with the throttle closed, the cylinders can't draw in enough air and you'll get a low reading...

[Rickrod3]

Let me know

This weekend I'm going to pick up some spare engine parts and I'll be able to spare a piston for a while.

Give me the contact information and I will send out a used piston out of an SG.
I think for ring purposes it does not matter.
Correct me if I'm wrong.

Or did this die on the vine?


Rick

[TECHLINETOM]

This weekend I'm going to pick up some spare engine parts and I'll be able to spare a piston for a while.

Give me the contact information and I will send out a used piston out of an SG.
I think for ring purposes it does not matter.
Correct me if I'm wrong.

Or did this die on the vine?


Rick

I just need the ring depth as accurately as possible.

A Vernier or dial caliper is fine.

I have the specs on the rings that should fit but I

am not allowed to release the part numbers until

I can confirm the ring groove depth.

Thanks in Advance,
TECHLINETOM

[James England]

That's easy... to get an accurate compression test, you have to have something to compress; with the throttle closed, the cylinders can't draw in enough air and you'll get a low reading...

Aaah! So obvious! Yet, so obscure! One of those "I can't believe I didn't think of that" moments here..... It had never occurred to me before!

[crazy steve]

What's even more interesting, if you remove the carbs you'll get an even higher reading; somewhere in the neighborhood of 200 psi. The restriction of the closed slides limits the air that gets into the motor too...

[Rickrod3]

This is what I got

I just need the ring depth as accurately as possible.

A Vernier or dial caliper is fine.

I have the specs on the rings that should fit but I

am not allowed to release the part numbers until

I can confirm the ring groove depth.

Thanks in Advance,
TECHLINETOM

1st compression ring Groove 3.25 MM
2nd compression ring Groove 3.25 MM
Oil Rail groove 2.62 MM

[Rickrod3]

As per my measurements

O.K. Guys here's the deal.

Can someone measure as accurately as possible the ring groove depths on a new piston?

I have part numbers for the rings (Top, Second and Oil as well as Gapless top and rail) but Ed @ Total Seal made me promise not to release them until I could confirm the ring groove depths.

Once I get the depths (I believe they are not all the same so please measure all three) I can get them put on the computer system @ Summit Racing
and I will post them here as well as the XJ forum so we can get rings.

top 2 are real close maybe they are supposed to be the same but; the oil rail is definitely different.

Piston has 45K miles on it that and I'm not a machinist.
I did the best I could.

Rick

[TECHLINETOM]

GROOVY ! ( pun intended)

That's exactly what I needed.

Thankyewvurrymuch!!

[Rickrod3]

Groove to ring relationship

What is the desired effect of the the groove depth to the cross section of the ring?

I'm guessing it has to be able to secure the ring and allow it to compress as needed but; is there an exact ratio? cross section to groove depth.

Is there an additional way to tell if you way ring wear besides the end gap?
I'm thinking the cross section would be smaller as the ring wears.

I measured a couple rings and they were 2.98 MM and 2.18 both smaller than the groove.
Being that rings are designed to wear this data really is meaningless unless I knew what the original dimensions of a ring would be.

TIA
Rick

PS any new developments with getting ring replacements?

[TECHLINETOM]

O.K. here is the word on the rings.

Total Seal doesn't have an oil ring to fit because the ring groove is too shallow.

The second ring they might have off the shelf depending on the measurement.

The top ring is a go.

I tried to get them added @ Summit Racing but the part number system is set up differently @ Total Seal for ring sets in less than lots of 500!

So all of our ring sets are custom except for the Wiseco giant pistons.

Contact Ed Law @ 800-874-2753

PLEASE CONTACT ED LAW ON ALL CUSTOM ORDERS.

Ed told me that they can even machine the ring grooves on your pistons.

Once you get a Quote Number from Ed all you have to do is contact Summit Racing and purchase the Quote Number.

Ed said that you would get a better price thru Summit than from Total Seal direct.

Thanks,

[Edisto]

Has anyone followed up with this or called them to order?

[windjammergump]

top end rebuild

i am doing a rebuild kit on my topend now..wiseco 1179 got mine from dynoman in fl....but he dropshipped from a company in ohio...515 plus shipping....but i got a mechanic doing my work ..bought the bike with 20xxx miles on it and seemed tight but after a month of riding started smoking done a leak down and 1,2 and 4 leaked down 14 and 3 leaked down 40 ....just went ahead and made sure no wear with a bore and new kits they come with pistons rings wrist pins clips and new gasket....i think that was all there didnt open mine just dropped it at the shop.........anyone know how much difference i will see from going from a 1101 to 1179 ????i am just curious..thanks GUMP