Timing and Octain
Thread Starter
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Elder User
Joined: Mar 2003
Posts: 522
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From: Warren, MI
Timing and Octain
Im wondering what I should set my timing at to get maxium performance at certin octains.
I know that its suppose to be set @ 10 BTDC, but whats it best at:
87?
89?
91?
93?
Right now I have it at 12 with 93, could I go higher with the timing or keep its where it is and goto 89/91?
Im just trying to tune this thing a little bit more.
Thanks guys!
Adam
BTW its a 302
I know that its suppose to be set @ 10 BTDC, but whats it best at:
87?
89?
91?
93?
Right now I have it at 12 with 93, could I go higher with the timing or keep its where it is and goto 89/91?
Im just trying to tune this thing a little bit more.
Thanks guys!
Adam
BTW its a 302
Last edited by AYoungblood; Jun 21, 2004 at 08:19 PM.
Thread Starter
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Elder User
Joined: Mar 2003
Posts: 522
Likes: 0
From: Warren, MI
Ive done a few vacuum mods, full exhaust, from block to rear end; bassani and flowmaster, my "ram-air" intake and a few other small things.
Also I plan on getting a MSD 2F coil and a 6a box this week/end.
Adam
Also I plan on getting a MSD 2F coil and a 6a box this week/end.
Adam
Senior User
Joined: Apr 2004
Posts: 368
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From: NH
get your hands on a timing light and check the timing so if some thing goes wrong you have a point to go back to then advance the timing till you hear it start to LIGHTLY ping now bring it back about two degrees. if you use a high octane gas you will be able to advance the timing alot further but then you have to run that same gas all the time. i have a chart around here some where i'll try to find it.
Senior User
Joined: Apr 2004
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From: NH
ok i found one of the charts. here they used a bone stock 5.0 and they ran it at 15 degrees adv. on 93 octane fuel. it made 6 hp more than stock (stock is 10 i believe). just for safety with a stock set up i wouldn't go more than 14 degrees and after you put the MSD ignition in crank up your fuel pressure about 5 to 10 psi it will give you a little more power and the hotter ignition won't have a problem burrning it. where you set your timing depends a lot on you set up and what your doing with it. at twelve degrees you can use 89 with out any problems.
Last edited by robduval; Jun 22, 2004 at 10:43 PM. Reason: add info
