Thread: Nic Cam Compression Ratio

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  1. #1 Nic Cam Compression Ratio 
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    Hey currently rebuilding my l67 for my 2000 GTP Im trying to decide compression ratio with a NIC Cam? 8.5:1 or 9.9:1 I will be using JE Forged pistons the block has been lined honed got ARP main studs and King xp Main and Rod bearings along with l32 Rods. Im running a double roller chain and 136 valve springs I also have a Gen V feeding a stage 2 Intercooler and Pacesetter headers. My question is what kind of pulley can I run with the higher compression or should I stick with the lower compression and up the boost?
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  2. #2 Re: Nic Cam Compression Ratio 
    The Boss Iceman6669's Avatar
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    If you are gonna be on the blower, Id recommend the higher compression ratio.
    97 GTP Sold-prolly rusted away by now
    2011 F-150 Yote powered
    Too Hot to Handle, Too Cold to Hold
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  3. #3 Re: Nic Cam Compression Ratio 
    GXP Level Member GTPpower's Avatar
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    That^^

    Pulley size is going to depend on what fuel you're running and how well your intercooler works.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  4. #4 Re: Nic Cam Compression Ratio 
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    In only have 94 available in my area But I also have Meth Injection... Just trying to get some idea of what pulley can be run with this cam and higher compression.
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  5. #5 Re: Nic Cam Compression Ratio 
    Killa Bee Scottydoggs's Avatar
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    im on a 2.8 with meth, high comp l36 block stock cam but i have 1.95 rockers. and a fsic. i make about 12-13 psi.

    you might be able to run a 3.0, 3.2, this is where having a few pulleys on hand helps out a lot, you never really know what its gonna like best. need to play with it.


    do not use l36 valve springs, you want like 130 lb springs with a xp cam.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  6. #6 Re: Nic Cam Compression Ratio 
    GrandPrix Junkie SgtMarshal's Avatar
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    he's going to run an NIC cam with forged pistons
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  7. #7 Re: Nic Cam Compression Ratio 
    Killa Bee Scottydoggs's Avatar
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    still dont want to run stock springs on any aftermarket cam.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  8. #8 Re: Nic Cam Compression Ratio 
    GXP Level Member GTPpower's Avatar
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    I think he is saying 136# valve springs, not L36 valve springs.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  9. #9 Re: Nic Cam Compression Ratio 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by GTPpower View Post
    I think he is saying 136# valve springs, not L36 valve springs.
    lets hope so, i read it as using L36 valve springs. re reading it looks like 136 lol the skim factor got me again.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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