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Discussion Starter · #1 ·
I'm having a hell of a time deciding between which cam to go with. I've talked to several reputed builders and received different answers. It will be going into a '07 qc 4x4 with a ported eagle head swap that is primarily street driven but will see as many passes on a 125 shots as I can fit into my schedule. The truck has a 2800 stall t-verter and a 6.1l intake manifold swap. The last few builders have recommended the following:

Comp 262hr-14 (1200-5700 rm, .483 lift)
Comp 268h-13 (1500-5800 rpm, .528 lift)
Comp 273h-14 (2000-6200 rpm, .547 lift)

I am thinking the 273 might be too high am rpm range for general street driving for the wife (but might be perfect for me :LOL:), the 268 looks more in the range I'm looking for but I'm worried about the bottom and top end, then the 263 would be a safe bet but such a low valve lift makes me wonder about volumetric flow rates, especially with the nitrous.

Yes, I have looked at the inertia grinds, but their lack of communication with me has left a sour taste in my mouth, even if we had talked once about a custom 112lsa grind.
 

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The sidewinder is a great choice all it is is a reground compcam not to sure which and typically adds 60hp i have a buddy that putting one in an 07 motor this week! Here are the specs .524/.524, 212/212 @
0.50, 114 LSA
 

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A lot of people get good results with the sidewinder, I have a KRC 210X...it's pretty similar but more torque, pretty good lope, it's on a 110 LSA. I haven't made any passes down the track to give you any numbers with it though...but there are a lot of fast sidewinder trucks. Was your eagle head swap a direct swap? I didn't know if the ports where shaped a little different on those or not.
 

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I'd go with the 268 or 273, and definitely not the 262. I ran a 272 duration cam in my ford and it was pretty street friendly, I almost never had a problem (it would stall itself sometimes, but that was because I tried to keep the idle as low as possible). With computer management idle issues seem to be a thing of the past with big cams. I'd probably lean towards the 268 just because you won't be making any power with the 273 at cruising rpms with the way these transmissions are geared...

Are those grinds dual pattern? I'd run a cam that has more exhaust lift and/or duration than intake. Especially at higher rpms, it makes a big difference.
 

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I'm having a hell of a time deciding between which cam to go with. I've talked to several reputed builders and received different answers. It will be going into a '07 qc 4x4 with a ported eagle head swap that is primarily street driven but will see as many passes on a 125 shots as I can fit into my schedule. The truck has a 2800 stall t-verter and a 6.1l intake manifold swap. The last few builders have recommended the following:

Comp 262hr-14 (1200-5700 rm, .483 lift)
Comp 268h-13 (1500-5800 rpm, .528 lift)
Comp 273h-14 (2000-6200 rpm, .547 lift)

I am thinking the 273 might be too high am rpm range for general street driving for the wife (but might be perfect for me :LOL:), the 268 looks more in the range I'm looking for but I'm worried about the bottom and top end, then the 263 would be a safe bet but such a low valve lift makes me wonder about volumetric flow rates, especially with the nitrous.

Yes, I have looked at the inertia grinds, but their lack of communication with me has left a sour taste in my mouth, even if we had talked once about a custom 112lsa grind.
What here the gains from that manifold swap??
 

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I would imagine alot over his stock manifold.
 

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Discussion Starter · #8 ·
Was your eagle head swap a direct swap? I didn't know if the ports where shaped a little different on those or not.
What here the gains from that manifold swap??
The swap is fairly straight forward, the intake and exhaust ports are different but the old exhaust header ports can easily be ported to match, that's what I'm doing to my arh headers, our you can just get an '09 set of headers. The point of the 6.1l manifold swap is to not use the spacers to port-match the intake manifold. Also, the 6.1l manifold flows much better at mid-high rpm, and with mine being ported it'll flow better at the bottom end too. I didn't have to do the manifold swap, but I got a g ood deal from a local guy and it was only $600 more to do the swap so I said to hell with it and went for it.
 

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of the ones you listed..the 262 would work best, you mentioned 4x4 and a 2800 stall...you need tq to get your beast movin..
 

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Def comp 262 or lower custom grind close to the sidewinder dur and lift. If you go 273 you'll regret it...low end and gas milage will suc as a daily driver. Me, 220ish/505ish for 4x4 but sidewinder specs look good too...do ur valvetrain match...don't skimp on that. Comp says you can leave the 262 valvetrain stock but I wouldn't.
 

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My custom grind is 210/214, lift is .523/.526 on a 110 LSA, 106 ICL... I just called comp cams and got it 4 days later...I also have a 4x4 with TCI torque converter 2600-2800 stall...the truck is pretty heavy so went with a more torquey cam to get her moving...I'm curious to what the benefits are of the Eagle heads as opposed to big valve standard ones...other than the port matched intake
 

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Spartan eagle lsa is 115 and i have plenty of vacuum but im also bored and stroked so idk if that changes things...
 

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The vacuum is fine. My truck has stalled out a couple times when coming to a stop or going into reverse but I have my idle set around 750 ish. If I bumped it up it would be just fine, but I love the lope too much lol.
 
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