VVT 5.3 Cam swap review, Comp 401, idle clip inside
02-07-2016, 09:52 AM
#15
Cam Specs: 214° int 228° exh@0.050” lift is 0.559” intake 0.571” exhaust 114° LSA
Just last week I installed a comp 189-401-13 VVT cam into my 2010 Silverado LMG 5.3. The truck has an Airaid MIT and a dumped muffler. Along the way I installed a VVT phaser limiter, DOD delete (LS7 lifters) COMP 918 beehive springs, and COMP rocker trunnion upgrade. COMP advertise no loss of low end torque, and I can vouch for this 100%. (Based on the SOTP) the truck pulls just as hard as before on the bottom end, stronger mid range, and up top it pulls way harder.
Using HPTuners I set the the shift points to about 6,200rpm on the 6l80. It hasnt been on a dyno yet, but I would guess about 40-50whp gain up top based on experience. Also I haven't messed with the VVT tables yet. It set at about 7 degrees of cam retard by 6,000 RPM.
I can't stress enough about checking the part number on your cam phaser. I have seen many people online swap VVT cams and complain about a loss in torque, having not checked what cam core to use. If you use the wrong cam core you will loose low end torque. (see the sticky at the top of this section for more info) My 2010 used a 189 cam core.
It has a decent sounding idle, great daily driver truck cam. Check out the idle clip...
Comp VVT cam 5.3 idle - YouTube
Just last week I installed a comp 189-401-13 VVT cam into my 2010 Silverado LMG 5.3. The truck has an Airaid MIT and a dumped muffler. Along the way I installed a VVT phaser limiter, DOD delete (LS7 lifters) COMP 918 beehive springs, and COMP rocker trunnion upgrade. COMP advertise no loss of low end torque, and I can vouch for this 100%. (Based on the SOTP) the truck pulls just as hard as before on the bottom end, stronger mid range, and up top it pulls way harder.
Using HPTuners I set the the shift points to about 6,200rpm on the 6l80. It hasnt been on a dyno yet, but I would guess about 40-50whp gain up top based on experience. Also I haven't messed with the VVT tables yet. It set at about 7 degrees of cam retard by 6,000 RPM.
I can't stress enough about checking the part number on your cam phaser. I have seen many people online swap VVT cams and complain about a loss in torque, having not checked what cam core to use. If you use the wrong cam core you will loose low end torque. (see the sticky at the top of this section for more info) My 2010 used a 189 cam core.
It has a decent sounding idle, great daily driver truck cam. Check out the idle clip...
Comp VVT cam 5.3 idle - YouTube
02-11-2016, 02:00 PM
#17
Staging Lane
Thread Starter
No, the VVT allows for a wider powerband. Most conventional cams work well in a narrow RPM range, but by varying the cam timing with VVT, you can dynamically move the power band. you can keep low end torque and also gain high RPM horsepower.
but yes, it will help MPG (a little)
but yes, it will help MPG (a little)
03-21-2016, 08:59 PM
#19
Staging Lane
Thread Starter
depends on my mood and gas prices. I made a tune for e85/93 octane (its flex fuel) and I also have a tune for 89 with less timing in it. You could tune if for 87 if you desired.
05-05-2016, 03:16 PM
#20
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