jclayc

iTrader: (8)

Hi everyone - relative cam noob here but I've done a good bit of reading.

I'm about to add a Maggie TVS1900 setup to my LS6 CTS-V and I'm wondering about my current cam's suitability for use with the supercharger. Current, basic specs:

• LS6 block rebuilt at 50k miles, ~10:1 compression
• Comp Cam 229/239 .627"/.621" 111.5+3
• Balanced crank
• Forged Mahle pistons & Scat H beam rods
• Trick Flow Fast as Cast 220 heads
• YellaTerra 1.7 rockers
• BTR lifters
• Dual springs
• 7.450 pushrods
• Kooks 1 3/4" headers

I've seen a number of recommendations I'll list below and, other than asking ya'lls opinion, I'll ask a noob question: if I change the cam to something like 224/230 .612/.612 116 LSA or 224/230 .581/.588 114 LSA, of course I'll need a tune but am I right that I'll also need to make sure my pushrods are still the right length & adjust all the valves?

Cams I've seen recommended:

• LEP Magna Charger blower cam 224/230 .612/.612 116 LSA
• Comp Cams 54-444-11 224/230 .581/.588 114 LSA
• Lingenfelter GT2-3 207/220 .571/.578 118.5
• ETMC Stage 1 Blower Cam unk except 115 LSA

DavidBoren

Personally, I would use the cam you already have. Positive displacement blowers love a little extra exhaust duration, and your cam has a large exhaust bias. Your cam has the most lift out of the others mentioned, as well. Just rock the cam that's in there. Spend the money on some 2" primary headers. Positive displacement blowers also love a free flowing exhaust system.

hellbents10

iTrader: (10)

You could have something that makes more power and drives much smoother with the 1900. That cam is not only hurting power but also drive ability, although I am sure the sound at idle is nice.

jclayc

iTrader: (8)

thanks for the input. what element = drives smother? The LSA?

Also, am I right that I'd need to adjust all valves afterward unless I pretty well match the lift/duration of my current cam?

DavidBoren

Short answer is yes, a wide lsa tends to be generally accepted as more drivable or street friendly.

It has to do with the valve events and the amount of overlap. The tighter lobe separation is, the more overlap it has, usually. More overlap creates a lot of the characteristics people deem undesirable in a street car.

Have you considered the ls9 cam? Very drivable, mild lobes for good valvetrain stability, lots of people using it with good results, it's cheap, and it's fairly similar to the gt2-3 lingenfelter cam on your list.

jclayc

iTrader: (8)

wow, $120 is cheap for a new LS9 cam