Cam/Timing question
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Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Cam/Timing question
1. What does a longer duration/lift cam do differently than the stock grind? (let a larger volume of air in basically?)
2. Why do we add timing on the low end when tuning for a long dur/lift cam?
TIA
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2. Why do we add timing on the low end when tuning for a long dur/lift cam?
TIA
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Registered User
Joined: Jan 2003
Posts: 2,043
From: Mooresville, NC
Re: Cam/Timing question
Originally posted by s_willis
1. What does a longer duration/lift cam do differently than the stock grind? (let a larger volume of air in basically?)
Skip
1. What does a longer duration/lift cam do differently than the stock grind? (let a larger volume of air in basically?)
Skip
Thread Starter
Registered User
Joined: Jul 2000
Posts: 993
From: Three Oaks MI
Okay, so we have more air/fuel coming in.
With a longer duration will the engine also suffer a loss in manifold vacuum?(at lower rpm,idle)
That's what I understand to happen. If that is the case, how does increasing the spark timing raise the rpm ? I know it does because I've seen it happen. I just wonder how it does it!
Thanks for the response
With a longer duration will the engine also suffer a loss in manifold vacuum?(at lower rpm,idle)
That's what I understand to happen. If that is the case, how does increasing the spark timing raise the rpm ? I know it does because I've seen it happen. I just wonder how it does it!
Thanks for the response
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