Retarding the timing on blown engine

Old 04-12-2010, 09:30 AM
  #1  
jreiley
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Default Retarding the timing on blown engine

How much timing should the ignition be retarded on a blown bbc per pound of boost? Or should it?
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Old 04-12-2010, 11:12 PM
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herbtfx
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Default Blown BBC Timing

Assuming that you are using a mag (locked, no advance), set your total timing within your tuning window and leave it alone.
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Old 04-14-2010, 08:30 PM
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zipper06
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It totally depends on the engine, blown alcohol usually likes around 32*, if you lay a little nitro on it it needs to be down to 28*'s and even lower depending on how much nitro.

just from my experience

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Old 04-16-2010, 04:11 AM
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jreiley
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The car is just your run of the mill 67Camaro. Gas. Distributor and msd 7
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Old 04-16-2010, 07:58 AM
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zipper06
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A freind of mine runs a 871 on a 383 small block. He has it set at 32* with an automatic 4* retard at 8lbs. It's 4500 lb shortbed chevy and street driven, but runs in the 11's in the qtr. mile. I don't know how he has it wired up, but he also uses a MSD.

hope this helps

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