Cam question

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Cam question

Post  Will Brewer on April 18th 2015, 9:59 pm

Cam spec  at  .050  280/300  adv du  313/340  .750 lift.   112 lobe sep .would this cam work in  a twin turbo  aplication...9-1 compression race fuel?thanks.

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Re: Cam question

Post  gmsmkr on April 19th 2015, 9:58 pm

What type of turbos are you using
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Re: Cam question

Post  whatbumper on April 19th 2015, 10:06 pm

way too big. Lift is fine. duration is crazy.

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Re: Cam question

Post  gmsmkr on April 19th 2015, 10:10 pm

Turbo engines run faster (at the track) when you open the exhaust valve sooner. With short intake duration, the engine responds with speed at the track. By opening the exhaust valve sooner with either a tighter lobe-separation angle or long exhaust duration, the engine generally responds better. You will lose scavenge if you open the exhaust valve too late.

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Re: Cam question

Post  Will Brewer on April 20th 2015, 6:39 am

Yea, I kind of thought that may be too big .i I also have another cam  .640 lift  duration  at .050. Is 270/276  adv  dur 310/314  108 lobe sep.would that work?  The turbos are 77mm

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Re: Cam question

Post  gmsmkr on April 20th 2015, 9:29 am

With what you have that would be a starting cam but if you had the funds I would give a call to your choice of cam guys and let them cut a cam to your app it would be ALOT better than a OTS cam
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Re: Cam question

Post  Will Brewer on April 20th 2015, 10:16 am

Rhanks

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Re: Cam question

Post  whatbumper on April 20th 2015, 12:25 pm

It is better on the duration and lobe separation sides but now the lift is probably too low for your heads depending on how they are finished out.

Your best bet is to get a custom cam. It is the heart of the motor so you can't just get by. The cam is probably more important to a turbo motor than the heads.

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Re: Cam question

Post  Will Brewer on April 20th 2015, 5:01 pm

Thanks fo the reminder.

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