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47hemi
Which lobe center???


Happy New Year to everyone!! Have a tech question about my 354 hemi. Engine has been bored .080, has early large port 331 heads, 11:1 pistons, Edmunds 2x2 wet intake. Trans is a A518 NON-LOCKUP and 4:10 gears behind that. All of this is going into a 47 Plym that is going to weigh 4500 lbs (approx). It will be street driven and has power brakes. The cam I want to use is Hot Heads 485 solid but I am not sure whick lobe center to buy, 108 or 112? I would loke to keep the cylinder pressures as low as possible because of the pistons i bought the engine with but I need decent vacuum for the booster. Any help appreciated. Thank you and thanks Bob for the parts!

Adam
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on: Fri 02 of Jan, 2009 [19:19 UTC] reads: 17020

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dennish
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Re: Which lobe center???
on: Tue 06 of Jan, 2009 [01:10 UTC] score: 0.00
> Happy New Year to everyone!! Have a tech question about my 354 hemi. Engine has been bored .080, has early large port 331 heads, 11:1 pistons, Edmunds 2x2 wet intake. Trans is a A518 NON-LOCKUP and 4:10 gears behind that. All of this is going into a 47 Plym that is going to weigh 4500 lbs (approx). It will be street driven and has power brakes. The cam I want to use is Hot Heads 485 solid but I am not sure whick lobe center to buy, 108 or 112? I would loke to keep the cylinder pressures as low as possible because of the pistons i bought the engine with but I need decent vacuum for the booster. Any help appreciated. Thank you and thanks Bob for the parts!
>
> Adam

Call Hot Heads, they will tell you exactly what you need. I think your cam is overkill. 108 for auto trans. - 112 for std.

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dennish
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Re: Re: Which lobe center???
on: Tue 06 of Jan, 2009 [23:32 UTC] score: 0.00
>Adam,
I got to thinking about your cam .285 advertised as compared to @ .050. If your cam is .285 advertised duration, you can probably go more. Again, call Hot Heads and give them the info, and they will recommend a cam. You seem to have all the info. that they would need.

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47hemi
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Re: Re: Re: Which lobe center???
on: Thu 08 of Jan, 2009 [15:22 UTC] score: 0.00
> >Adam,
> I got to thinking about your cam .285 advertised as compared to @ .050. If your cam is .285 advertised duration, you can probably go more. Again, call Hot Heads and give them the info, and they will recommend a cam. You seem to have all the info. that they would need.


Thanks for your help. I took your initial advice and did my homework. I ended up wirh a 288 / 480 (advertised) HYDRAULIC from Isky. My biggest limitation ended up being the intake manifold I am running. It was suggested that with that cam and variable duration lifters would be the best bet. By the way, I chose the 108 LC. Thankyou again.

Adam


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