cam or intake manifold
 

Wondering if I should do cam and springs first or a msd atomic airforce intake? What would need a tune afterwards -baller on a budget

Both would need a tune. Cam/sprimgs you'll see more gains.

Intake 1st. The stock ls2 intake is not the best. I had an 06 A6 with similar mods, I did the ported fast 92 1st and the car ran great. You would want to upgrade the manifold when doing a cam anyway. Get it out of the way now.
Unless you decide to go FI.

It's a 07 a6. I got longtube headers,high flow cats, exhaust, cai. Would the fast require a tune to function? I plan on getting a tune just don't want get a tune and a month later put in cams and springs and need a retune. I'm looking at then new msd atomic airforce manifold

I did a dyno overlay of all my mods from headers to heads. See below.

It's wise to remove airflow restrictions in the proper order, which is headers, then cam, then intake, then heads. Going out of order doesn't make sense, for example, Trickflow heads are great but on a stock cam they aren't the bottle neck so you won't notice the difference.

See how they stack up on the dyno, and note the last three only matter from 4500 rpm up. There is other good discussion in this thread as well so read on if you care to.

https://www.corvetteforum.com/forums...ast-heads.html

Thanks I will Def check that out

It doesn't matter what order you do your mods. Keep in mind that a cam will have a lot bigger gains on a stock motor than an intake swap would on a stock motor. I can't really see the MSD Atomic giving you much until you have other mods to make it shine. Granted there might be a slight increase but you will need a dyno sheet to tell it. You will feel the powerband extended the first time you hammer down with a cam swap.

Personally, I would go with a stall first. Then cam, then heads, then Atomic

Guys he said LS2 MOTOR...intake stocks is junk! Yes cam will net more power but a fast will still net 20hp on a LS2.

Damn that MSD intake is a nice piece of work. A little too expensive for me though. I gotta stick with the FAST 92/102. Go with the intake before the cam, but if you can afford both, get it done, tune it and be done with it.

Or track down a LS3 intake and buy a cam.

What i would do.
 

Buy a 3,400 stall headers ls3 heads and intake manifold appropriate cam port throttle body slap it all in at ones and tune it.

You can just swap out LS3 heads and intake onto a LS2? Is that the difference between the LS2's 400 hp to the LS3's 430hp?

Yes, LS3 heads and intake will swap over.

Edit-Misread.

Yeah I just changed my heads on my LS3 today to Prc 260cc, I forgot about the intake/head difference. Guess I should sell my old heads.

unless you have other mods like headers & CAI, I would do the Intake 1st. The gains will be marginal, but the swap will take an hour or so. If and when you do a cam swap, the added volume of the intake will yield higher gains. Think of an engine as an air pump, the faster you get air in & out the higher output it will have.

:ack: I don't agree! FACT 90MM WILL suport 1200HP. you have to butcher your fire wall to install the fast, 20hp? you WILL have to tune after you install, your right I've seen 20hp gains too BUT was it the fast or the tune? IMHO if you want to get the BEST HP for the buck SUPERCHARGE IT! 7-8 grand 200 HP. if you just want to get over 400 hp to the ground, cam it and tune, my 2006 MN6 LS2 Z06 exhaust system, roller rocker arms, K&N intake, just tuned 381 HP 378 TQ

DUH? the LS2 is 6.0 L and LS3 6.2 L thats the diff

Thanks for all the responses :thumbs: currently thinking cam spring install with torque converter and maybe gears with tune. Any thoughts ? I'll do intake later in year or next?

You don't have to butcher the firewall to install a FAST 102.