Questions after cam swap
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Joined: Mar 2007
Posts: 1,698
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From: NE Pennsylvania
Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Questions after cam swap
I just swapped in a new camshaft in my motor. My questions are around what should I set my timing to and what should my minimum idle speed be set at? The cam has specs of 260/260 duration, .444/.444 lift 112 LSA. Motor is a 305 TPI.
Joined: Sep 2003
Posts: 25,895
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Questions after cam swap
doesnt seem like a very big cam, should idle fine around 700 rpm and like about 16-18 degrees timing total at idle. basically it should idle ok on stock timing specs as i think stock tables have around 16-18 at idle. i'd have to double check that but i'd just set base timing 2-4 degrees more advanced and run that if you dont have tuning equipment to burn your own chips
Thread Starter
Joined: Mar 2007
Posts: 1,698
Likes: 3
From: NE Pennsylvania
Car: 85 Iroc-Z
Engine: 383 TPI Procharger D1SC
Transmission: TKO600
Axle/Gears: Strange S60 3.73
Re: Questions after cam swap
Shouldnt I advance the timing more though because of the larger cam that I put in?
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Set it at stock spec. Drive/run it.
Advance it 2 degrees. Drive/run it.
Repeat until it runs worse, then back it down to the previous setting.
Advance it 2 degrees. Drive/run it.
Repeat until it runs worse, then back it down to the previous setting.
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