Lq4 6.0 cam only build possibility
07-26-2020, 03:48 PM
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Lq4 6.0 cam only build possibility Lq4 6.0 cam only build possibility
Budget build, looking for advice 6.0/2wd 4l80e 74’ firebird Stock lq4 6.0l Stock 317 heads that i would like to try and mill down to up the compression, if allowable with cam choiceCam.617/.624” duration 281/289 lobe separation angle 113 Rpm range 2000-7000 Jegs #555-514122 springs .650 max lift Titanium retainer Jegs #555-20238 push rods 7.4” chromoly hardened Jegs #555-20825 lifters Stock .842 od Speed engineering long tube headers Factory truck intake Stall converter? 2wd 4l80e Injectors? No forced air Is there anything you would consider changing about this build? It will be EFI with the factory pcm My goal is 500hp and a daily driver
Budget build, looking for advice 6.0/2wd 4l80e 74’ firebird Stock lq4 6.0l Stock 317 heads that i would like to try and mill down to up the compression, if allowable with cam choiceCam.617/.624” duration 281/289 lobe separation angle 113 Rpm range 2000-7000 Jegs #555-514122 springs .650 max lift Titanium retainer Jegs #555-20238 push rods 7.4” chromoly hardened Jegs #555-20825 lifters Stock .842 od Speed engineering long tube headers Factory truck intake Stall converter? 2wd 4l80e Injectors? No forced air Is there anything you would consider changing about this build? It will be EFI with the factory pcm My goal is 500hp and a daily driver
07-27-2020, 11:34 AM
#2
How long do you want your valvesprings to last?
If you're pulling the heads, I would put on a set of 706 or 862 heads. They're much better than the 317s.
I personally would not go that big on the cam for a DD especially in a truck. A smaller cam will make the same torque, just at a lower rpm.
Are you changing the converter?
If you're pulling the heads, I would put on a set of 706 or 862 heads. They're much better than the 317s.
I personally would not go that big on the cam for a DD especially in a truck. A smaller cam will make the same torque, just at a lower rpm.
Are you changing the converter?
07-27-2020, 11:39 AM
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Doing a 3,000 stall I think. Got an email from hitech racing and he suggested a .625/.625 228°\234° or something in that area along with 40-50 lbs injectors. Going with dual valve springs and slowly adding to the list for my build this winter.
07-27-2020, 11:55 AM
#4
That will work ok. Might be a little soft at part throttle. I wouldnt go over 224 duration on the intake but I really like low end tq.
Tbss/nbss intake manifold is also better than the lq4 by about 15-20 hp with a cam that big probably.
Tbss/nbss intake manifold is also better than the lq4 by about 15-20 hp with a cam that big probably.