Gapless rings

[Kart21]

I want to put gapless rings in the next motor. Hi-po street motor 302 based, Brodix heads, 4 bbl, forged pistons, stroked crank ( only .016) old school. Have every thing but the rings. Damn mouse got into the ring box and made a nest. Oversized rings, file to fit now not to good.

Is there any thing I need to be aware of if I put gapless rings in.
Do I need to run a vacuum system?

School me wise ones.

[46Tbird]

I assume you're talking about Total Seal rings. I used them on my turbo 4 years ago. No issues running them in an unmodified engine.

[Kart21]

Good to hear, thanks

[Kart21]

More info would be appreciated.

https://www.summitracing.com/int/parts/tsr-s9090-40/applications/?ibanner=SREPD2

[stephen4785]

I ran them in my 302 build when I had a 65 stang. I think they had just came out back then. Motor had a big cam and gapless rings and it made enough vacuum to work the brakes just fine. A gapless ring is going to make slightly better vacuum anyway. You should have less blow by, not less vacuum. Mine worked great and I didnt have to file the damn rings down which is a plus.

[Acrotom]

Well, you asked for feedback from "wise ones", but I will answer anyway.

I like gapless rings - my experience is with Total Seal, so can't say much about other brands.

Cylinder wall prep is important with any type of ring, but I have noticed that cylinder leakdown is better with gapless rings than other engines with similar attention to bore prep.

When you refer to vacuum system, I assume that you mean a crankcase vacuum system. If so, then gapless rings will not create a requirement for such a system - in fact, gapless rings should reduce the need for a crankcase vacuum system (less cylinder leakage = less crankcase pressure).

I don't believe that a street type engine will benefit much from a crankcase vacuum system.

Cylinder bore preparation is important. It is worth the cost to get that right, so use a good machine shop that has torque plates and uses them.

Hope this helps,

Tom

[Baron Von Crowder]

I ran them in my 302 build when I had a 65 stang. I think they had just came out back then. Motor had a big cam and gapless rings and it made enough vacuum to work the brakes just fine. A gapless ring is going to make slightly better vacuum anyway. You should have less blow by, not less vacuum. Mine worked great and I didnt have to file the damn rings down which is a plus.

Well, you asked for feedback from "wise ones", but I will answer anyway.

I like gapless rings - my experience is with Total Seal, so can't say much about other brands.

Cylinder wall prep is important with any type of ring, but I have noticed that cylinder leakdown is better with gapless rings than other engines with similar attention to bore prep.

When you refer to vacuum system, I assume that you mean a crankcase vacuum system. If so, then gapless rings will not create a requirement for such a system - in fact, gapless rings should reduce the need for a crankcase vacuum system (less cylinder leakage = less crankcase pressure).

I don't believe that a street type engine will benefit much from a crankcase vacuum system.

Cylinder bore preparation is important. It is worth the cost to get that right, so use a good machine shop that has torque plates and uses them.

Hope this helps,

Tom

[Kart21]

Torque plates were used. Max Long did the work. ( Long Racing Engines) Cylinders are good. Measured them with the plates still on, within .0002 of each other round with a good dial bore gauge.

Decked the block, to pistons out of the hole by .005 both sides to get them equal.

TRW forged flat tops with eyebrows. I hope to get the rings and get the compression ratio soon.

Any more info guys. Thank you.

I will start putting it together in Sept. Too hot in the garage now as it faces west.