everyone shoots for 300+rwhp, but what about torque numbers?...what's the highest NA torque someone has reached on my350z?

 

put on teh nawz bish

 

no one cares about torque?...i'd figure low end power would be important too

 

A 4.2L stroked build NA VQ could prob hit 350 torque on a good day. I really have no idea on the actual number but it would br pretty good compaired to 3.5L

 

i know the hypothetical scenarios, but i just wanted to see what people had actually reached on here

 

I swear I saw someone with 265wtq on an 07 with some mods and a tune in their sig!? I love torque, but I also accept what the VQ gives me (245wtq) and work with it. Short of going FI or with bigger displacement in our cars, I opted for shorter gearing (3.9) and not loading my car up with 200lbs of stereo equip. or an additional 30lbs in body cosmetics!

nawz DJ... nawz! lol, i hate that word



Zquicksilver

 

As long as the peak value is 6K+. I would love to make 200 tq @ 6500 RPM.

 

^ that would be nice... I wonder why BMW can't do it?

The new M3 motor (4.0L-V8-ITBs) creates 295lbs.tq. @ 3900k and 414 @ 8400. BMW says they gave up HP on the top end for some grunt at the low end... and I would consider anything below 3900 low end on their scale, lol.

This why I'm ok with my TQ numbers, if in fact the dynapack at GRD is accurate. 245wtq. @ 17% drivetrain loss puts me at 295lbs.tq at the flywheel. Its a little confusing though... the fact that my 3.5L puts down almost the same numbers as the 4.0L @ 3900!? This can't be right or can it?
I've been wondering about this for a while...


Zquicksilver

 

Im with you bro. Honestly i want to concentrate on torque more than hp. Id prefer to have more torque than hp and im just as curious as you are as to the highest torque on here. So who has the highest and how did you do it?

 

I hit 272 tq on a dyno jet...

 

graph(s)?

 

damn... so your telling us you put down 328 lbs. tq. (factoring in a 17% drivetrain loss) at the flywheel!? That is one impressive 213 cu. in. engine!!!

are you running a 16:1 compression ratio or reving up to like 14k, creating your peak tq. at like 9k?


Zquicksilver

 

I thought that was done on a dynodynamics and corrected to simulate dynojet numbers?

 

maybe the torque number looks low in BMW's setup because they rev so high and have a tune for high end hp.

either way, we should see what a stroked VQ race engine would do when cosworth is done with the build challenge.

 

Torque is a function of displacement and C/R .............notice that 75-77 lb/ft per liter at flywheel is a very high number for N/A . Direct injections can achieve 81-83 lb/ft per liter thanks to 8% more air [fuel not taking up room during intake].

Anytime a N/A reads higher after reverse correcting on dyno, the dyno is probably wrong [correction factor].

 

^ i'm pushing for 93lb/ft per liter... or 328lbs.tq at the flywheel


Zqucksilver

 

Dang nice numbers. What has been your favorite mod so far?

 

^damn, someone took me seriously!

kenpo, that response was in lieu to this one...



Zquicksilver

 

Where people get confused is that driveline loss increases with rotational speed of components, so you cannot use the same 15% for HP peak rpm as you do for mid rpm torque where losses might be 10% or less!

The only way to measure engine output at flywheel is to pull engine and place on a dyno..............all this reverse calculation from a chasssis dyno is full of errors.

 

LOL, I was just skimming over the thread and saw your post. Helps to read everything