Zero gap 2nd ring dyno test(old HR article)
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
Zero gap 2nd ring dyno test(old HR article)
if you are building a motor, you may want to read the 3-94 Hot Rod article, page 70.
They gained 9 hp from 3500-6000 on a 414hp SBC,
and cut blowby by 20%
i'm going thru my old mags; saving good articles;making the trash man happy with the rest :hat
They gained 9 hp from 3500-6000 on a 414hp SBC,
and cut blowby by 20%
i'm going thru my old mags; saving good articles;making the trash man happy with the rest :hat
Instructor
Joined: Jun 2002
Posts: 117
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From: epping nh
Re: Zero gap 2nd ring dyno test(old HR article) (drives61)
Thats some big money for the rings though. I looked into them when building my motor and at 100+ for file fit Zero Gaps it was just to much to stomach for 9 horseys when its much easier to make that up in other areas.
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
Re: Zero gap 2nd ring dyno test(old HR article) (subboz)
subboz
i agree. i'm too cheap too!
But, i did buy speed-pro file fit rings.
The above test used .018" top ring gap. i used .012", so when warmed up, my top gap is maybe .001-.002"
To convince me, they would have to re-test with a .012 gap.
Also they did normal rings on the first dyno, then zero's after 10 more runs. Some of the gain could be from breakng in. I would need to see a re-test with the normaal ring AFTER the zeros.
Recently there is conflicting data showing more power with a WIDER 2nd gap :confused:
Whenever :confused: i spend less!
I posted the info so somebody could look it up, and form their own conclusion, which could vary for sure :smash:
i agree. i'm too cheap too!
But, i did buy speed-pro file fit rings.
The above test used .018" top ring gap. i used .012", so when warmed up, my top gap is maybe .001-.002"
To convince me, they would have to re-test with a .012 gap.
Also they did normal rings on the first dyno, then zero's after 10 more runs. Some of the gain could be from breakng in. I would need to see a re-test with the normaal ring AFTER the zeros.
Recently there is conflicting data showing more power with a WIDER 2nd gap :confused:
Whenever :confused: i spend less!
I posted the info so somebody could look it up, and form their own conclusion, which could vary for sure :smash:
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
Re: Zero gap 2nd ring dyno test(old HR article) (drives61)
Warm gap of .001-.002 YIKES! You got more nerve than I do.
That would ideal if you could be sure it would get no smaller.
End gap butt is an unpleasent situation :smash: I can attest to that personally :jester
That would ideal if you could be sure it would get no smaller.
End gap butt is an unpleasent situation :smash: I can attest to that personally :jester
Thread Starter
Race Director
Joined: Oct 2000
Posts: 15,055
Likes: 79
From: central FL, near the beach.
Re: Zero gap 2nd ring dyno test(old HR article) (yellow 72)
i got that tip from Smokey Yunicks' Power Secrets book.
he said he ranthe Daytona track .012.
I figure if it worked for him, must be OK.
ONLY for forged :smash: pistons.
Gives an extra 10-25 HP :yesnod:
he said he ranthe Daytona track .012.
I figure if it worked for him, must be OK.
ONLY for forged :smash: pistons.
Gives an extra 10-25 HP :yesnod:
