I have searched and looking for answer on how nissan made that extra power from the 350z. What was changed or added to make the new 300hp. Sorry if this is a repost.

 

Simple search revealed this:

Continuously Variable Timing (CVT) on both the Intake and Exhaust Cams
New shorter, wider intake
New Bottom End (Revised pistons, rods, etc.)
New ECU Mapping
Higher Redline stock (7000 vs. 6600)

 

It is really a different beast. Stock with spacer added had dyno 262 whp that is the snizzle , it takes us 2k of mods to get there...I want the 35th... but it did lose some T/Q ..

 

The car is also several thousand more expensive. I do like the reliability of extra horsepower under warranty, but power is power whether stock or in the aftermarket.

 

torque wins races, HP sells cars....who cares if it has 300hp...it all depends on torque really and how it's used. HP is just a # based on that and gearing.....ill keep my 287hp engine any day

 

Actually Nissan heavily underrated the 300hp motors torque. Stock I dynoed 235rwhp, which is 276 crank torque with a 15% drivetrain loss. It is true that torque is very important, but look at the dyno graphs for the 300hp motor. The torque is so flat and carries way longer then the 287hp motor.
http://community.webshots.com/photo/...43525011sJKGpr

 

this may be a dumb question too, but are the track models the same as the 35th's in that department?

 

+1

 

dont get me wrong about torque....how it's used is the most important thing. yes the TQ curve is nice on the 05 tracks, but for the extra $ to get it i could easily have more power with a few boltons (plenum, cai, nismo cat-back would get me there with almost no low-end loss).

the only thing i really like about the engine is the 7000 redline. but i am still dismayed as to how the new engine does 0-60 in the same time as the old engines.....to me it seems like Nissan's main goal was to reach that "300hp mark" to draw more sales.....but i could be wrong

 

Yes.

 

How I sit now, I am confident that I could take a 287hp engine that has plenum, cai, and cat-back. The 287hp is not a bad engine by all means, but everyone says that nissan's only means with the new engine was to get 300hp. This engine has new heads, new pistons, new cams, VTC on intake and exhaust, new lower plenum, higher redline, and stronger rodbolts. This kinds seems like a lot to do just to get to 300hp, they could of easily just changed the cams and gotten to 300hp on the 287hp motor.

 

yea im urious to see how the 300 engine handels boost and what dyno number would you get. I have seen the 300 at the track and there the same 1/4 as me or im sure any 287 motor user, ...the best time i seen was 13.7 which was the same time as mine.

 

hehe i dunno why, but the title to this thread reminds me of "where do babies come from?"

 

VTC on intake is overrated. Thinking VTC produces power is stupid.

VTC does NOT produce peak power. You could have an exhaust cam grinded to provide the same exact lift/overlap/whatever without VTC at given rpm and they would peak eactly the same. The only thing VTC will do is that it changes the cam geometry and make engine deliver power on a wider RPM range. It does NOT affect peak power... as a matter of fact.. if you only use engine at HIGH rpm, VTC is completely useless (most race engines get rid of variable timing as it's only a liability).

Thawk... until you go to dragstrip, yours are STILL only irrelevant speculations. Everywhere the 35th anniversary and 2005 track are equivalent to older Z in acceleration.

 

This is a bit unrelated, but our stock Zs over here come with 280bhp, and I dont understand why?

 

Me going to the dragstrip will prove nothing, as I do not have very good drag racing skills (but I will work on this). Also, this is a thread speculated the power of the engine, not how well it does on a dragstrip. The power of the 300hp engine is no speculation anymore. I did not bring VTC into the equation for peak power, I mentioned it because it helps a great deal to make the torque curve so linear. All I am saying is look at a stock dyno for a 287hp and then look at one for the 300hp. NOT saying one is better then the other, just showing how the torque does not peak and then drop drasticly as the 287hp.

 

the 300hp is certainly a better engine than the old one.

I do not agree that it will make more power than the old one with bolt-ons, as it's still the same engine. They have the same "peak" potential.

 

I disagree with you on this one, but we will see in a few weeks when I add some more bolt-ons. And it is not the same engine, it is basicly a totaly new engine. It has different piston shape, diff heads, and other parts that I have already mentioned

 

Does the engine(pistons) have higher compression ratio? No. It's the same exact engine with a few minor tweaks.

the only thing that produces power on the new engine are the plenum, cams/heads and ecu most probably. Rod bolts do not produce power, and neither does VTC has I mentioned.

IF the new engine(modded) produces more power, it's going to be so marginal it's irrelevant. The more you do to the engine, the more it will even-out.

If you follow the plan you mentioned in another thread (higher CR pistions, cams, heads, etc... ) everything will hit the trashcan anyway... except the rodbolts.

 

It is not the same engine with a few minors tweaks and no one knows the compression ratio yet. Your statement is about the same as saying my chevy truck has a 350ci so the vette engine is the same with just some minor tweaks. Tweaks as new intake, new heads, new pistons, etc. The same differences that the 300hp engine has vs the 287hp engine. Of course the changes are more drastic on the 350, but the basic idea is different and better parts.

Well considering with just the plenum I am making as much power or more as the 287hp engine with headers, plenum, and cats. Why wold it just "magicly even out"??? If I correctly understand what you are saying, you are saying that the new engine will just even out and have as much power as the old engine? That statement makes no sense as we have already seen that the 300hp motor stock has as much power as most of the 287hp motors do with bolt-ons. But, hopefully we will know further truth as to how this motor does with bolt-ons in a few weeks.

I am not in any way trying to start a war as to why I think the motor is better, I am just displaying what I have seen in the past and hopefully what I will see in the furture.