Ok guys new to this and I wanna swap out my cams how big can I go with on a stock block without changing the valve train??

 

with so much data in your post we can provide quality answers........

Dreamer thread detected.

 

What info do u need

 

If you have to ask that question, you aren't ready young padawan.

 

How much psi are you running?
What size turbo granules?
SOHC correct?

 

I just don't understand what he means I kno the stock size in238 ex240 lift is 9.2 I just wanted to kno if I could go to 272 with a 10.5 lift without hitting the valves

 

No turbo basically stock besides pulleys intake and exhaust from cats back

 

is the z a non interference engine?

 

what year is your z?
what brand cams are you looking at?

 

Its an 03
And BC or TOMEI
unless u guys could suggest better

 

BC has its cams that are close to what you are looking for and so does tomei.
I have bc stage 2 and no issues or complaints.

Sounds like anything more than 11mm of lift and you could potentially hit the pistons with the intake cam programming

aftermarket piston half valve reliefs.

 

Nice sounds good I'm just trying to do some basic mods for now until I try to boost it thanks though man I'll prolly have more questions ull answer in the future

 

I would call, BC and JWT, talk to them. My bets are that they would know best.

 

Yea that prolly would be best since I wanna boost it in the future

 

If you're running FI you'll run a different cam profile than if you're running NA. Make this clear when spec'ing out the cam.

 

I'm running 11:1 wisecos w/ JWT c8's 272 in/ex 12.01mm lift. You wont have piston-valve contact issues unless you start running mid-12:1+ compression from what I was told by Kyle @ IPP with this set of cams. Also, make sure you compare cams vs price. Tomei's and BC cams are more expensive than JWT if you include their valve springs, and are not as aggressive.

I imagine you'll be fine with JWT C8's on a stock engine, however you wont be able to make complete use of them without upgrading your oil pump, and internals. 264dur cams have netted over 300whp for some built block VQ35DEs along with supporting mods. If FI is in your future though, you're just wasting money chasing NA power.

If you plan on FI in the future, and are simultaneously thinking about cams... on a stock '03 VQ35DE... you're in for trouble. QTB's on point about NA vs FI cams. FI cams while staying NA on a stock engine are a total waste of money. You're going to blow the '03 VQ35DE very quickly more than likely, and just have to build the motor. The early engines are not boost-friendly.

 

Yea iv been told that before are all the de's hard to boost or the early years

 

They are hard to boost with stock internals. I did and learned my lesson the hard way. So new build is in the process.

 

Stock DE, should limit to 350whp IMO. 400whp and above is where I've heard **** starts to break quickly on the VQ35DE.

 

What is your opinion based off of?? 350whp will hold all day on a stock de. Above 400 is when it gets a little more dangerous. 450 is pretty much the tipping point. Obviously this is provided you have a good tune. I ran mine at 350whp for several months no problems.