Basic cam question

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Sep 22, 2013 | 01:51 PM

ls1kbush

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From: cincinnati

Basic cam question

I got this motor through some trading and just have a few question.
LQ9 block bored to 4.005
6.125 eagle rods
4" callies crank
diamond pistons 4.005 with 28 cc dish
absolute speed stage 2 heads (806's) said to flow over 300 cfm
255/263 .623/.623 on a 116 lsa

My plans are to swap the pistons out for some flat tops which should net close to 11 to 1 compression with the current heads.
I have thoughts on porting a set of 706 heads I have laying around but I'm curious to how much the combustion chamber needs opened up for the 4" bore and how much cc's I will loose.
With the 706 heads I believe I would be near 11.7 to 1 or more.

My main question is on the cam.
Is it considered to be a nitrous cam or turbo cam?
Or is it good for either setup?
Nitrous would most likely be in the future.

Sep 22, 2013 | 02:01 PM

ls1kbush

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Here is the cam card.

[IMG]

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Sep 22, 2013 | 08:54 PM

sfrech182

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That is one beastly cam... based on the lobe separation and duration differences looks more suited boost. But my guess would be that it would work great with either one.

Sep 22, 2013 | 09:56 PM

ls1kbush

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That's kinda what I was thinking. I haven't found many people running this big of a cam unless they just don't say anything.

Sep 22, 2013 | 10:10 PM

smokeshow

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You couldn't pay me to run that cam with a turbo. Far more nitrous friendly..

Sep 22, 2013 | 10:56 PM

ls1kbush

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Quote:

Originally Posted by smokeshow

You couldn't pay me to run that cam with a turbo. Far more nitrous friendly..

That's what I was hoping to hear.
To me it seems like a possible good cam for high compression and still be able to run pump gas.

Sep 23, 2013 | 12:45 AM

PREDATOR-Z

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From: BFE

Quote:

Originally Posted by ls1kbush

That's what I was hoping to hear.
To me it seems like a possible good cam for high compression and still be able to run pump gas.

Yeah but 11:1 is not very high.
At what rpm range do you plan on using?

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Sep 23, 2013 | 08:09 AM

ls1kbush

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From: cincinnati

I race when ever I can and thats almost every week. I dont know what rpm's these motors are good for but I took my LS1 to 7k every weekend so I can assure you I will run it thru whatever usable rpm's I can.
But truthfully I would probably try to keep it under 7500 just to see it live longer.
I tend to shift when it stops pulling.

I know 11 to 1 isnt high compression.
Thats why I have been thinking about utilizing these 5.3 heads I have and unshroud the valves for the 4" bore and then open up the ports.
Or I can get some domed pistons and keep the heads I have but they are the ugly perimeter style but flow over 300 cfm