Nissan 370Z Forum - View Single Post - Can you get to 400 without turbo or super-charger

JoeyD · 03-16-2009, 10:29 AM

You two (RCZ and Bobo) are making the mistake. You are comparing the VQ37 to the VQ35 and still assuming that they are similar enough to draw conclusions. THEY AREN'T. The whole basis of my argument is that the aren't. And you can spout off all you want about 4gs, and 2JZs and LSwhatevers I don't care. Do any of those motors have VVEL? Nope!

The question of how much power can be made is a little flawed as well. A significant portion of the power to be made comes from freeing up restrictions that Nissan built in (purposefully of incidentally). I'm sure in it's final years the G37/370Z will probably be advertised with 350HP or more. Nissan of course engineered in room to grow with 3.7L. In these early stages we figure out where the room is and milk it for all it's worth. For all we know this motor could be capable of 425HP NA and it's been down-rated to 332 for the whole "room to grow" philosophy. We just don't know.

You can also talk about mustang dyno vs others but that's a stupid way to claim that the mods didn't make power.

At 332 Crank Horsepower:
270RWHP DynoJet = 19% Drivetrain Loss
Est. 250RWHP Mustang = 25% Drivetrain Loss

Did the Crank HP change? I doubt it, since the engine must be within 5% of the marketed HP value. So lets add some mods...

We'll just use an arbitrary number like 400 Crank Hp (about where I estimate the mods I listed would put the 3.7L)

Dynojet 19% Loss = 324RWHP
Mustang 25% Loss = 300RWHP

So the mustang reads less, it doesn't change the power output one bit. Admittedly these numbers are abstract but the point is valid regardless of the numbers you plug in.

The original question was can you make 400HP NA? If you are looking for RWHP probably not (not to say it couldn't be done, it's just a hard claim to defend). If you are willing to accept that 324RWHP on a given dyno = 400 Crank HP then yeah you can probably get there with bolt ons and most importantly tunning (especially VVEL tunning).

P.S. It wasn't that you "called me out" that I have a problem with. I can listen to alternative opinions without taking it personally. That's called being objective (you should try it sometime). It was, however, the rude, diminutive, abrasive, and disrespectful manner in which you called me out that I guarantee wouldn't happen twice if you were looking me in the eye (although, I highly doubt it would even happen once).

03-16-2009, 10:29 AM	#115 (permalink)
JoeyD Enthusiast Member Join Date: Jan 2009 Location: Raeford, NC Posts: 305 Drives: 09 NISMO 370Z Rep Power: 186	You two (RCZ and Bobo) are making the mistake. You are comparing the VQ37 to the VQ35 and still assuming that they are similar enough to draw conclusions. THEY AREN'T. The whole basis of my argument is that the aren't. And you can spout off all you want about 4gs, and 2JZs and LSwhatevers I don't care. Do any of those motors have VVEL? Nope! The question of how much power can be made is a little flawed as well. A significant portion of the power to be made comes from freeing up restrictions that Nissan built in (purposefully of incidentally). I'm sure in it's final years the G37/370Z will probably be advertised with 350HP or more. Nissan of course engineered in room to grow with 3.7L. In these early stages we figure out where the room is and milk it for all it's worth. For all we know this motor could be capable of 425HP NA and it's been down-rated to 332 for the whole "room to grow" philosophy. We just don't know. You can also talk about mustang dyno vs others but that's a stupid way to claim that the mods didn't make power. At 332 Crank Horsepower: 270RWHP DynoJet = 19% Drivetrain Loss Est. 250RWHP Mustang = 25% Drivetrain Loss Did the Crank HP change? I doubt it, since the engine must be within 5% of the marketed HP value. So lets add some mods... We'll just use an arbitrary number like 400 Crank Hp (about where I estimate the mods I listed would put the 3.7L) Dynojet 19% Loss = 324RWHP Mustang 25% Loss = 300RWHP So the mustang reads less, it doesn't change the power output one bit. Admittedly these numbers are abstract but the point is valid regardless of the numbers you plug in. The original question was can you make 400HP NA? If you are looking for RWHP probably not (not to say it couldn't be done, it's just a hard claim to defend). If you are willing to accept that 324RWHP on a given dyno = 400 Crank HP then yeah you can probably get there with bolt ons and most importantly tunning (especially VVEL tunning). P.S. It wasn't that you "called me out" that I have a problem with. I can listen to alternative opinions without taking it personally. That's called being objective (you should try it sometime). It was, however, the rude, diminutive, abrasive, and disrespectful manner in which you called me out that I guarantee wouldn't happen twice if you were looking me in the eye (although, I highly doubt it would even happen once). __________________ When was the last time you did 230MPH in something with 4 seats?