G37 has plenty of low-end torque factory-stock, but it's not similar at all to our engine. G35 owners can't swap in vq37...that was probably intentional to keep folks buying new cars.lets just cut straight to it and swap a vq37hr into an X!?
Possibly things are different with V6 applications, but on V8's this wouldn't be true.Shorties are for higher rpm...you want longer tubes as your primaries (e.g. LT's) for lower to mid torque gains.
Other way around, generally. Shorties give you low-end tq, possibly at the expense of high-end tq. Which is fine by me. Living in the foothills of the Appalachians I can be going 25mph and suddenly wind up at 2700rpm just from incline on the road.Shorties are for higher rpm...you want longer tubes as your primaries (e.g. LT's) for lower to mid torque gains.
I'm happy with my LT's and the exhaust's performance, although mine is too loud for my tastes. It can be fixed and will, just saying...
Haven't dyno'd my X, but did my 2011 Frontier P4X for an IMS test and it put out some respectable numbers (even stock). Will see if I can find the actual ones and update later.
wow, 20 hp in gains. I'd expect more from all of that. What elevation are you at?Highest I've seen in all my searching is:
But that dude has a full blown race engine with triple 40mm webber carbs.
I currently have:
Volant Cold Air Intake
XTP Intake Manifold Spacer
Doug Thorley Long Tube Headers
High flow cats
UpRev Dyno Tuned
My Dyno Numbers:
Most of these parts don't drastically improve your "Max" numbers. What they do is flatten out your torque curve. In stock form the VQ40 makes peak torque @ 4k rpm. With all these modifications My torque curve is around 240 @2k and peaks at 263.4 @ around 5k rpm greatly increasing drivability and useful torque.
A word of caution: I did all of these modifications, and didn't immediately dyno tune. When I finally got to the dyno the techs said that the X was running very lean. So if your doing more than CAI and a muffler, you should really tune the truck ASAP.
I want to give a hat tip to: 5l33p3r for his write up: How-to: DT Long Tube Headers Installed w/Dyno #'s