Dyno Results using Standard, Filed, and Gapless Rings 2

[RodRico]

Nice article from Hot Rod Network I thought others might enjoy. Below are their dyno results using factory gapped, file gapped, and gapless rings.

Factory Gap:
Peak HP: 434.7 hp @ 5,700 RPM
Peak Torque: 450 lb-ft @ 4,400 RPM
Average HP (3,000-6,000 rpm): 363.3 HP
Average Torque (3,000-6,000 rpm): 425.6 lb-ft

Filed Gap:
Peak HP: 441 hp @ 5,700 RPM
Peak Torque: 459.2 lb-ft @ 4,500 RPM
Average HP (3,000-6,000 RPM): 370 hp
Average Torque (3,000-6,000 RPM): 433.9 lb-ft

Gapless:
Peak HP: 451 hp @ 5,600 RPM
Peak Torque: 465 lb-ft @ 4,500 RPM
Average HP (3,000-6,000 RPM): 375 HP
Average Torque (3,000-6,000 RPM): 440 lb-ft

 

[CWB1]

Looks to all be within standard variability.

 

[Tmoose]

Interesting, but an A-B-A test sequence for each ring type would sure have been nice.

These ring gap test results on pages 1 and 2 originally appeared along with a cool graph in a document from Speed-Pro back when the parent company Sealed Power was on its own, and a premium product.

https://www.aa1car.com/library/ring_info_speedpro.pdf

 

[enginesrus]

I think gapless is a misnomer.

 

[RodRico]

enginesrus, you're in a bit of a mood today it seems. If you don't like the name, I suggest you call Total Seal and complain. See

http://www.totalseal.com/rings-gapless-rings.html

 

[GregLocock]

Have you tried measuring the ring friction in a motored test, or even a pull through test (ie put a piston in a cylinder and push on it?

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[RodRico]

GregLocock, I'm not sure to whom your question is directed. If it was me, the answer is no, not yet. I'm still trying to decide which ring type to use.

 

[enginesrus]

Rod, I know they call them that, the comment wasn't to you.

 

[PackardV8]

Yes, it's standard in a magazine test, the advertiser's product always produces the most power

In production engine quantity, piston rings are an ant-shit cost component. If the Total Seal Gapless were actually worth 3.5% additional horsepower and torque, they'd be universally used.