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#1
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Basic timing question. I think.
If I change my initial timing from 16 to 14, will that prevent me from getting to the 34 total that I currently have? I've read all the suggested material on timing, still trying to fully understand. Thanks
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#2
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yes unless you change the curve in it.Tom
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#3
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If you move your initial timing from 16 to 14 it SHOULD move your total from 34 to 32. There are a few things that can change that assumption. But we'll stay basic for now.
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#4
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Thanks for answering and being here for us less mechanically inclined.
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#5
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I know where I want my total timing so I check that 1st.
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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007 (cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD 1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86' |
#6
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Skidmark, What RPM does it become total?
The distributor springs and weights would determine how quick it would get to max advance. There is a slot that determines the max advance, so if it needs to be higher or lower the slot needs work. Yours may be at 'max advance' because of rpm limit of engine. Generally the max advance is used then the initial will be what it is for max advance. If initial is too high, the appropriate weights/springs and slot length would be changed. So, basically if using for street, set the initial at what is needed, use vacuum advance for driving. Racing can use the total max advance. (higher rpm)
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." Socrates |
#7
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John, I was all in at 2500-2800. I need to try that again, as my wife was having a hard time keeping the rpms up. Car was on jack stands and loud making her nervous. I'll recheck today and get a more precise rpm at all in timing.
Thanks |
#8
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There is no need or benefits to alter the factory ignition settings, IF you feed the engine with proper amounts of A/F mixtures in ALL areas, idle, off-idle, main circuit and WOT circuit.
Igniting a too lean A/F mixture too early will NOT give your engine itīs full potential. |
#9
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+1 with the caveat that you need to start from a stock distributor that has not had someone mess with the weights, springs, vac advance, and curves.
THEN you can start tuning. |
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