Why does the VX sound

[Luna X]

like an F15 fighter jet on the runway?

I have an aftermarket air filter on it, and I recently replaced the fan clutch. But this thing is loud! My 350Z (same size engine btw) creates a beautiful growl but doesn't have anywhere near the loud, whirring noise that comes from the engine of the VX...

... that leads me to another question.

How does Nissan get 75 more horses from their 3.5 than what Isuzu produces? Is it mostly in the computer? Would remapping work? (If it can even be done)
I'd love to get a little more power, but since the supercharger is no longer available, and turbo kits are more of a piece together, it seems like choices are quite limited.

any idears?...

[Gussie2000]

It's all about engine specs luna.

The VX 3.5L is a low compresion engine,that's why it use 87 regular octane gas & produce 215 hp which if fact was a lot of power back in the late 90's according to my mech the VX was one of the most powerfull V6 SUV world wide,just after the nissan pathfinder which had 240 hp ( all 2001 edition ) even more then few V8 SUV's out there back in those days.

The nissan Z350 which is a high performace car with a high compresion ratio that requires higher octane gas,plus both vehicules have different gross weight,ground clearance,etc.

Don't forget that the VX engine is a 13 years old engine,if the latest version of isuzu 3.5L that you find in the 2004 axiom can the use in the VX you'll definately have more power.

The 2004 isuzu 3.5L engine kicks 250 HP with direct injection technology. Unfortunately isn't compatible with the VX

[Luna X]

That's a great little tid-bit of info, Gussie. thanks!

I have yet another querie about these VX's...

We got rid of a 2WD 2000 Rodeo (3.2L) that seemed to have much more "oomph" from a standstill.
Does the TOD sap some of the linear power in exchange for more stability? I have to admit, the VX feels almost like the Z while zippin' around corners (and slow people)... gotta love the handling!

[Gussie2000]

That's a great little tid-bit of info, Gussie. thanks!

I have yet another querie about these VX's...

We got rid of a 2WD 2000 Rodeo (3.2L) that seemed to have much more "oomph" from a standstill.
Does the TOD sap some of the linear power in exchange for more stability? I have to admit, the VX feels almost like the Z while zippin' around corners (and slow people)... gotta love the handling!

I believe that the rodeo had more standstill power because of the 2wd ,the engine only had to focus on delivering the power to the rear axle,instead the TOD have to deal with two axles all the time so the load is more.

For a vehicule with 4000+ pounds & only 215HP the VX take off is acceptable.

[Bob Barker]

I had no idea they weighed that much.

I remember reading though that the factory transmissions can only hold around 300hp before they grenade. Maybe that's some of the reason why they didn't put a stronger motor in there.

[Luna X]

my Z is no lite-weight either... gvw is over 3800lbs!! It's more of a cruiser, not a rocket-ship. (It's actually longer & wider than the VX)

[SlowPro48]

The variable valve timing in your Z's engine also contributes a great deal to the increase in hp/liter. Don't know why the VX has so much fan noise/roar but I've noticed that too. Ah well... just part of the "character"!

[Triathlete]

Just turn the volume knob on your audio entertainment device clockwise a few notches and those noise's amazingly disappear!

[Gussie2000]

I had no idea they weighed that much.

I remember reading though that the factory transmissions can only hold around 300hp before they grenade. Maybe that's some of the reason why they didn't put a stronger motor in there.

Isuzu just don't wanna spend more cash to design & develope an stronger and better engine for the VX,

[Triathlete]

Isuzu just don't wanna spend more cash to design & develope an stronger and better engine for the VX,

In '99 215HP from the factory was pretty good. Compare it to other vehicles of that era.
(for comparison...1999 Mustang GT 260HP, 1999 Corvette C5 345HP and those were V8's)

[Luna X]

Just turn the volume knob on your audio entertainment device clockwise a few notches and those noise's amazingly disappear!

Back in my autobody repair days, that's exactly what I wished I could tell customers who came in and said,,, "I have this rattle/buzzing sound coming from so and so..."
No fair using that on me...

[Gussie2000]

[quote=Triathlete;200687]In '99 215HP from the factory was pretty good. Compare it to other vehicles of that era.

No doubts about that tri but we all agree that a bit more wouldn't hurt at all

[Triathlete]

No doubts about that tri but we all agree that a bit more wouldn't hurt at all

No dought more is better.

[JHarris1385]

You might want to check into that claim that the axiom engine does not work. I believe there was a swap on here.

[Ldub]

You might want to check into that claim that the axiom engine does not work. I believe there was a swap on here.

IIRC, He swapped in the lower end, but had to use the 6VE1 intake/throttle body/injectors because the ECU couldn't be adapted to the DI & fly by wire.