Hey,i was reading a thread on another forum and i was thinking about the port and polish for the 4th gen i have,is it possible? what kind of gains will i see? and how much would it cost if anyone would happen to know?

 

Bolt ons are more 'cost' effective. Do all you can outside the motor before going in.

 

http://forums.maxima.org/showthread.php?t=513982

Translation: don't bother with head work. get cams first and see how far you want to go.

 

well right now i have injen intake(soon replacing with pr cai) and i got mevi coming from a org memeber and im gettin the jwt ecu.

 

A couple of thoughts:
(1) Not at all cost effective compared to other mods;
(2) Hard to find a shop that will really know what they're doing, specifically to this engine. The goods ones will be quite expensive. And lots will tell you, "Sure, we can do it." But most of them I wouldn't want touching mine if it was free!
(3) Skip the MEVI and get an 00VI; been there, done both. Hands down, the 00VI is better.
(4) And get one of Cattman's new header setups.
(5) With all due respect to Matt93SE, different cams have a way of changing the "nature" of the engine - from mild to wild. The 00VI, Cattman headers and JWT ECU will increase your engine's performance (I'd estimate those would add up to 40-50 HP) without changing the nature. Sort of like stock on steroids.

 

i would do the 00vi but i have no one to help me plus its alot of work to do.im getting the ecu with the mevi and right after that im getting cattman headers and full catback exhuast

 

From the data I got most, if not all the cams available to us won't even take full advantage of the stock VQ head flow. Work on a better intake manifold, headers, and exhaust first.

 

Here's a post in a similar thread where I have the exact same thoughts as here.










There are certain items that are viable 'mods', i.e P&P/any type of headwork, cams, upping CR and I'm sure there are others that I have missed.

The point of the matter is, 98% of us still have not reached our full N/A potential as is. (i.e stock cams/heads/CR).

So unless you're nearly there (stock hardware limits) IMO, there is no reason at all to dive into 'radical' mods such as the aforementioned items.

 

I thought headers on a 4th gen made a nice noise and about 5hp?

 

Then you obviously thought wrong.

 

You're thinking about the pacesetter headers for the VG.....