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Cam to maintain low end

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Old Aug 14, 2009 | 11:36 AM
  #11  
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Check out the cam in my sig, good torque off idle and pulls to just over 6K. Doesn't require a higher stalled converter, but a mild one wouldn't hurt. If you're planning a mild converter (2600-3k), I'd recommend the proven Comp 212/218.
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Old Aug 14, 2009 | 01:07 PM
  #12  
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Originally Posted by 00Silv4.8
I have a Lunati 221/221 .884 114 in my truck right now. I would tell you to get it but on a 112. Mine doesnt hit till about 2000 or so, in my 4.8 it was about 3k. Other than a little loss of low end the cam has been great, pulls like an SOB up top and doesnt quit


Wow.......884 lift???

I would say anything with a short duration (Less than 230) and high lift would be ideal for low end TQ. Also if your thinking heads, any smaller volume intake head (Stockers, AFR 220's, TFS 215's) will add velocity to the air moving through the ports and you will pick up some TQ.
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Old Aug 14, 2009 | 02:22 PM
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I'm leaning more and more towards the hight lift 212/218. I wish it came on a 114 though. How bad would it be without the proper stall? I
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Old Aug 14, 2009 | 04:59 PM
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Saw this in the Classifieds, pretty close to what I was looking at but I dont know anything about reverse splits

.564 .562 220 218 114 LSA

How would this work?
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Old Aug 14, 2009 | 05:35 PM
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Originally Posted by Hawaiian_Built
Saw this in the Classifieds, pretty close to what I was looking at but I dont know anything about reverse splits

.564 .562 220 218 114 LSA

How would this work?
that would work similar to the cam in my sig. Real tq monste off idle, pulls real hard from 3500 to 6000.

The reverse split is typically not accepted as a good idea because the intake ports flow much better than the exhaust ports do on LS motors (most motors for that matter). The reverse split is designed, from what I understand, maximize the forces at work in the intake, heads and cylinders. Depends on several factors, intake runner length, which harmonic order the intake itself falls into, things like that. It has to do with intake air pulse rates and increasing the Venturi effect. Basically, reverse splits usually result in elevated Volumetric Efficiency, which causes higher dynamic compression ratios (more power). The Venturi effect combined with the vaccuum created in the cylinder when the exhaust valve opens results in VEs rising (it effectively "sucks" the air fuel mix into the chamber for the next one. Combine that with a thinner head gasket which reduces quench area (the area that is between the head and the block after heads are torqued) which in turn creates a less turbulent, more efficient flame front during combustion, again, increasing TQ.

Someone call me out if I am off base a little bit. Hope this helps.

Last edited by 03 BLACKOUTSSS; Aug 14, 2009 at 05:48 PM.
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