87 octane?
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From: 37363
87 octane? Fixing to take off in my car on a 4 hour trip each way and it would be nice to run some garbage 87 octane fuel like I do in my beater
Right now I'm running 34* from 800 rpm through 6800 with no advance from a map sensor and get no detonation. On 10% ethanol 93 octane
What is your guys opinions where to start for a 87 octane "curve" with using the map to add some vac advance for maximum fuel milage
Motor specs in signature
Right now I'm running 34* from 800 rpm through 6800 with no advance from a map sensor and get no detonation. On 10% ethanol 93 octane
What is your guys opinions where to start for a 87 octane "curve" with using the map to add some vac advance for maximum fuel milage
Motor specs in signature
how much compression in it? judging off the specs on your sig, I'd say just run it, and leave the timing the way you have it. When you intend on beatin on it, then put in the 93.
Only if your comp is above 10.5:1 would I lower timing to 31-32* for 87.
JMO
Barrett
Only if your comp is above 10.5:1 would I lower timing to 31-32* for 87.
JMO
Barrett
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From: 37363
Its stock compression other then the intake, headers and cam its stock i
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From: 37363
No doubt be a loud slow trip, all we have local is 1/8th mile that's the reason for the gear lol
On a side note I pumped my 12 gallon cell with 87 tonight set the timing to 30* and added 15* via the map sensor copying your map russ, seemed to do ok on the 10 mile ride home, I put between 60-70 miles on it a day so shouldn't take long to see how it burns through
On a side note I pumped my 12 gallon cell with 87 tonight set the timing to 30* and added 15* via the map sensor copying your map russ, seemed to do ok on the 10 mile ride home, I put between 60-70 miles on it a day so shouldn't take long to see how it burns through
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From: ocala,fl--- forest-ocklawaha
id never would have 32 timing anything below 2500 rpm.. ..sounds crazy to me.. maybe im just used to old school bbc.. my ly6 carbed i have 15 idle to 1000rpm then ramps up to 31* at 3000 rpm.. runs good to me.. use vacum curve to clean up down shifting etc. slowing down..
id never would have 32 timing anything below 2500 rpm.. ..sounds crazy to me.. maybe im just used to old school bbc.. my ly6 carbed i have 15 idle to 1000rpm then ramps up to 31* at 3000 rpm.. runs good to me.. use vacum curve to clean up down shifting etc. slowing down..
You should try setting your timing up to give your max total timing just above idle speed, and you'll see how much happier it feels.
Yes definitely use the vacuum advance as well, to add in another 10-15* at part throttle /high vacuum
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I wouldn't worry about the map at all with this guys set-up. I would 0 out the whole map curve as his time below 3000 rpm's is non existent with 4.30 gears and a 3500 stall. I would probably go with 30 degrees total flatlined from 3000 RPM's on for your trip with 87.
Manual transmissions and lower stall speeds should use the map and a carefully configured curve.
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Thread Starter
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Joined: Feb 2011
Posts: 28
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From: 37363
No doubt be a loud slow trip, all we have local is 1/8th mile that's the reason for the gear lol
On a side note I pumped my 12 gallon cell with 87 tonight set the timing to 30* and added 15* via the map sensor copying your map russ, seemed to do ok on the 10 mile ride home, I put between 60-70 miles on it a day so shouldn't take long to see how it burns through
On a side note I pumped my 12 gallon cell with 87 tonight set the timing to 30* and added 15* via the map sensor copying your map russ, seemed to do ok on the 10 mile ride home, I put between 60-70 miles on it a day so shouldn't take long to see how it burns through
