Ignition
Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
Easy, Try curve 2 if no ping good. If ping, go to curve 3. Hotter summer temps equal pings. With your set up proly also try retarding a 1/2 hair. Also, Run compression test if your up around 200+ lbs you proly at 3rd curve all ready.
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,095
Likes: 7,622
From: Poolville
The squish is probably the most important when deciding what timing curve to use. The smaller the squish the more advance the motor can handle without detonation. In your case start with the 3 and go from there. Install New plugs and do a 50-60 mile run with 93 octane fuel and the pull the plugs and look for signs of detonation on the porcelain insulator down in the plug. It'll look like pepper sprinkles. Sometimes you'll need a magnifying glass... Note: living up hear in NY this time of year will not give you a good indication as to where you will be because of the cooler temps right now. So definitely use curve three and run the motor a little fat on the fuel till spring or summer comes around..
Thread Starter
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Banned
Joined: Dec 2017
Posts: 4,506
Likes: 2,361
Thats what I thought when it was recommended, but Revolution Performance swears by it and Im happy with it.
Thread Starter
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Banned
Joined: Dec 2017
Posts: 4,506
Likes: 2,361
The squish is probably the most important when deciding what timing curve to use. The smaller the squish the more advance the motor can handle without detonation. In your case start with the 3 and go from there. Install New plugs and do a 50-60 mile run with 93 octane fuel and the pull the plugs and look for signs of detonation on the porcelain insulator down in the plug. It'll look like pepper sprinkles. Sometimes you'll need a magnifying glass... Note: living up hear in NY this time of year will not give you a good indication as to where you will be because of the cooler temps right now. So definitely use curve three and run the motor a little fat on the fuel till spring or summer comes around..
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
It's real easy to change curves.
Seasoned HDF Member
Joined: Jan 2015
Posts: 15,997
Likes: 7,111
From: Sandy Eggo's North County
.590 valve throw is a lot, especially with a short trunion to push rod ratio. Gotta watch valve lateral movement (wear) often.
GM learned this with their LS7 engine....
GM learned this with their LS7 engine....
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Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
I'm glad you're enjoying the new ignition.