05+ Engine Revision (300hp Engine) Vs Orig

[Ish_]

What exactly is the difference between the 2 engines, besides the marketing strategy of 300hp? Which is "better" and what makes it so? Looking for accurate non opinionated answers here http://forums.freshalloy.com/images/graemlins/smile.gif

[wperdigon]

well, I found on the web that a higher rpm line along with a different set of cams and pistons are why the 300 hp happen - here is a link about some of it

http://www.seriouswheels.com/top-2005-Nissan-35th-Anniversary-Z-350Z.htm

[idrive]

New cams, valves, springs, pistons, rods, ?crank?, smoother/larger intake manifold volume, ECU stuff. Cams are the primary reason for the torque loss because I do not recall there being a change in the strokes or bores of the blocks, just the internal materials.

I think the newer motors are far better for Forced Induction than the previous just because the materials are far stronger than before. I'm not saying the engines wouldn't hurt being built up, but its not as neccesary as with the older 1st-gen motors. I would trust a tt'd 05 block more so than an tt'd 03. I will always recommend building a block up before any forced induction though, its just extra insurance and the smart thing to do.

[idrive]

oh yea, jeff and will, I mated the tranny back to the engine today. I fought with one bolt for too long but eventually got it figured out. I may have it up and running this t-day weekend.

[palmerwmd]

New cams, valves, springs, pistons, rods, ?crank?, smoother/larger intake manifold volume, ECU stuff. Cams are the primary reason for the torque loss because I do not recall there being a change in the strokes or bores of the blocks, just the internal materials.

I think the newer motors are far better for Forced Induction than the previous just because the materials are far stronger than before. I'm not saying the engines wouldn't hurt being built up, but its not as neccesary as with the older 1st-gen motors. I would trust a tt'd 05 block more so than an tt'd 03. I will always recommend building a block up before any forced induction though, its just extra insurance and the smart thing to do.



I think Les summed it up pretty well , I wish to add teh following:

-rod bolts are also beefier
-VVT is <both> exhaust and inlet valves now

I also share his assessment on FI worthiness of the rev-up motors, as even a slight beeefing up will make a tremoundous improvement in reliability for FI IMO ,since the regular motor was close enough, in most situations (mine has 23,000 miles on FI)


Fred.. http://forums.freshalloy.com/images/graemlins/smile.gif

[wperdigon]

oh yea, jeff and will, I mated the tranny back to the engine today. I fought with one bolt for too long but eventually got it figured out. I may have it up and running this t-day weekend.



me so jealous - I wish I would afford it - but alas -I'm poor

thats very cool - make sure you post some pics of this monkey!!

[Ish_]

awesome!! we'll go for a drive!!

[TRACKZ]

The biggest change was the addition of variable timing on the exhaust cam, to go with the intake vaiable timing.

[JasonPerformance]

here is a short list...

REV UP Parts (http://performancenissanparts.com/catalog/advanced_search_result.php?keywords=05+track+350z& x=0&y=0)

[wperdigon]

wow - performance - thats a pricey engine

[palmerwmd]

That RevUp Motor sounds AWESOME!

I wonder how one could fit one into an 04...

I guess you would need, engine, ECU, + Harness (since CAS are different) right?

I see the rings are different too.. Are they beefier in any way?
And the new rods are a lot stronger right?

Fred.. http://forums.freshalloy.com/images/graemlins/smile.gif

[palmerwmd]

Jason:

I hear Z33 drivers have used the rev-up motor lower intake plenum with some success, as a performance upgrade?
http://performancenissanparts.com/catalog/product_info.php?products_id=3328

Fred.. http://forums.freshalloy.com/images/graemlins/smile.gif

[JasonPerformance]

yes, basicly what the REV-UP lower plenum does is shorten up the intake runners... This makes for a little bit less low end HP and TQ (like lost on the 300HP Z) but the high RPM's are brought to life!

If you put that lower plenum on you can make HP up to 7800 RPM and more with the rite cams...

We ran a Rev-UP motor to 7800 and still made power till 7600 with a totally stock Z...

I am building up my Z with 287 motor for 8000 RPM using the lower plenum and a few other parts...

The REv UP plenum makes 9RWHP up at red-line and still grows withthe stock rev-limiter... If you have a reflash going up to higher then stock RPM's then the REVUP plenum will definatly help you out and make even more HP...

The HP / TQ lost in the low end doesnt really come into play because as you shift up at high RPM's near red-line wwhen it is raised up, you do not go down into those lower RPM's anymore...

ie... shift from 7200 down to 6000 for next gear etc...

If you are thinking... well if the lower plenum makes power on the 287 motor, what would happen if you put the 287 lower plenum on the 300hP motor?

basicly, you get back the lower RPM HP and TQ that is lost from the lower plenum, but, the motor stops making power at 6200 RPM like the 287 motor... So a plenum spacer or Crawford plenum for example will "Help" with the Higher RPM's but not really much... If you put the 287 lower plenum (also on our site) will give you a great low end increase for the daily driver, but the shift points would have to be changed to make the most out of the motor...

For a track driver, i would recomend keeping the lower plenum and raising up your rev-limiter...

[wperdigon]

wow - I wish I could have an 8k red line - I wonder how much the short im will hurt the bottom end for daily driving?