All,
I'm looking to improve the HP on my stock 2006 G35; It has 120K miles on it, which I think is a factor when considering upgrades.

Does anyone know of a plan on how to improve my HP...consider all levels, but targeting plan for 300-350hp and 400-450hp?

Ideas?

 

Twin turbo

 

You'll need 10-15k cash to do it

 

From what I've read the ceiling for keeping the motor naturally aspirated is about 305-310 at the wheel and that includes different cams. Intake, exhaust (minus header), tune seems to give about 290-300.

If you want more it's either nitrous or forced induction and with 120k already on the motor you're just asking for a kaboom.

 

LS swap will run you $10-15k, potential for that motor is pretty good. Friend has an '04 sedan with an LS/6 speed swap, putting out 480 at the wheels with tuning to do. Personally, I think that's a better option than a turbo on the stock engine and you'll have more room in the engine bay.

Just bolt ons and tune with the stock engine, you can probably add 40-50 hp to the wheels. That will be enough to be noticeable. Maybe add a 50 shot of nitrous.

 

It's not a great to start throwing $$ into a car with 120K miles on her clock...fact! You'll end up spending twice what she's worth to get anywhere close to 300 WHP! Spend your $$ on service/maintenance to keeping the old girl running and looking good!
Gary

 

If you do decide to start bolting on HP to the motor just make sure you first correct any mechanical deficiencies. Get that vehicle running 100% before adding power, suspension components likely need to be fixed, misc. squeeks and stuff on the engine, etc. Also keep in mind that you may end up replacing the clutch if it's getting worn because the extra 40hp could make it slip.

Nothing wrong with adding power to an older motor if it's in good working order but I wouldn't be adding forced induction to something over 100k, ideally not adding it to anything over 60k...

 

Plenum 5/16 spacer , 75mm NWP throttle body , lower plenum collector , straight pipes and maybe some art pipes and good catback you can pick up about 40-50 simple bolt ons first , im in same spot your in i got 160k and looking into vortech but even if my compression test looks good , i still can run a risk of bending a rod but then again i am planning on running no more than 6lbs of boost if i do go SC route soon, but no more until i can get a built block .

 

Great advice !