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Old 01-10-2012, 07:48 PM
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Lunati Cam

Anybody every use or know anybody that has or had Lunati cam 07104?? .490 lift intake an exhaust adv. dur. 290 intake 297 exhaust Duration Lift 235 int./240 exh. at 050 inch i got a new one that i was going to use n my 355. Here is the hook-up. 2.02 Aluminum heads, Speed-Pro Powerforged 2.4cc Dome SB-Chevy Pistons , 680 cfm QF Carb. Edl air gap intake. going in 1979 Regal. It will be a street car but i do want to take it to the track @ times. My use a small shot of Nos 100-175 shot (maybe) Any info i will b thankful.

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Old 01-10-2012, 07:53 PM
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In my opinion, it's too much cam for the street.
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Old 01-10-2012, 08:20 PM
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Quote:
Originally Posted by Buddy impala
Anybody every use or know anybody that has or had Lunati cam 07104?? .490 lift intake an exhaust adv. dur. 290 intake 297 exhaust Duration Lift 235 int./240 exh. at 050 inch i got a new one that i was going to use n my 355. Here is the hook-up. 2.02 Aluminum heads, Speed-Pro Powerforged 2.4cc Dome SB-Chevy Pistons , 680 cfm QF Carb. Edl air gap intake. going in 1979 Regal. It will be a street car but i do want to take it to the track @ times. My use a small shot of Nos 100-175 shot (maybe) Any info i will b thankful.
You need an RPM or similar intake, but not an air gap- they take a long time before the intake temp is stabilized. Main thing is that it's a RPM, though- and not a 'plain' Performer.

That cam will want a 3500 RPM stall converter or thereabouts, and low gears. An OD AT trans would help you here.

The engine is going to want quite a bit of initial timing. I'd start out w/at least 16 degrees and be prepared to give it more. That means limiting the mechanical advance to keep the total timing from exceeding 34-36 degrees, all in by 2600-2800 RPM.

You have around 10:1 CR w/a too wide quench of 0.066". This is figured by having an undecked block and a common 0.041" head gasket thickness, 2.4cc domes and 64cc chambers. If this isn't correct, you need to recompute the CR to know exactly what you DO have.
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Old 01-10-2012, 09:22 PM
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355

The intake is a rpm air gap edlbrock. were you meaning i need a torker intake??? My intake is a rpm. It will have a OD trans in the car. An what were you saying about the C/R it should b around 10.6 to 1. What were you saying about the quench area?? Can u explain more?
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Old 01-11-2012, 12:38 AM
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Quote:
Originally Posted by Buddy impala
The intake is a rpm air gap edlbrock. were you meaning i need a torker intake??? My intake is a rpm. It will have a OD trans in the car. An what were you saying about the C/R it should b around 10.6 to 1. What were you saying about the quench area?? Can u explain more?
No Torker intake If you have the RPM air gap, that's OK by me- it just takes longer to get up to temperature. Personally I would choose the RPM w/o air gap but that's me.

Your CR would be about 10.7 if the deck were zeroed and you had a 0.041 head gasket. To know what the static CR is, you need to know exactly:

bore
stroke
how far down the cylinder the piston is at TDC (piston to deck clearance)
combustion chamber volume
piston dome/valve relief/dish volume
head gasket thickness
head gasket bore diameter

If you want to know the dynamic CR, you need to know the rod length and the closing point of the intake valve in addition to the above.

Very briefly, the idea behind quench distance is to have the distance between the head and piston decks around 0.040". This can be done by zero decking the block and using a common 0.041" composition head gasket, or any combination that nets you about 0.040" between the deck of the piston (not the dome) and the deck of the head. Do a search at the top of the page for "quench" and you can read up on it.
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Old 01-11-2012, 07:12 AM
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Are you sure about that 2.4cc dome piston, is that a typo? That's nothing, probably couldn't be seen with the naked eye. A .125" (1/8") dome is about 10cc.
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Old 01-11-2012, 03:44 PM
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355

Piston Head Volume (cc)-2.40cc.
Dome Height (in) 0.100 in.

Last edited by Buddy impala; 01-11-2012 at 03:59 PM.
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