2006 M45 vs 1990 Q45

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
911/Q45
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2006 M45 vs 1990 Q45

Postby 911/Q45 » Fri Apr 08, 2005 12:41 pm

Was just riffling through the M brochure and noticed the EPA mileage was 17/23. Dug out my old 1990 R&T test specs on the Q and the EPA mileage was 16/22. 16 years didn't make much difference there!


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Jesda
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Postby Jesda » Fri Apr 08, 2005 12:47 pm

But now you get a lot more power.

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Rex
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Postby Rex » Fri Apr 08, 2005 2:48 pm

What about the 04 M45?

That's more of a real comparison and truer to the spirit of the original Q45, IMHO.

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maxnix
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Maybe, but maybe not (Rex)

Postby maxnix » Fri Apr 08, 2005 3:46 pm

Rex wrote:What about the 04 M45?

That's more of a real comparison and truer to the spirit of the original Q45, IMHO.
I think two areas the new Y50 is most comparable to the G50 is the attention to chassis stiffness and the front suspension geometry. The McPherson struts used on the FY33, F50 and Y34 just don't work as well in extremis as the old multilink and the new double A arm. Though a larger car, the G50 chassis is stiffer than the W124 (MB 300E), the benchmark for the era. A lot of development was spent ensuring the Y50 was much better than the V35 in torsional rigidity.

It's not just the wrapping, but what's underneath. Both the G50 and Y50 illustrate functional beauty lies much deeper than just the surface contours deep.

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Rex
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Re: Maybe, but maybe not (maxnix)

Postby Rex » Fri Apr 08, 2005 4:44 pm

I just feel the 03-04 M45 was less about luxury and more about performance, much like the 90 Q45. IIRC, Infiniti was launching the M45 to be a killer in the $40k sports luxury sedan going after the non-M 5 series BMW. It's not purely the similar body lines, though those seem obvious, it's the spirit it embodies.

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Re: Maybe, but maybe not (Rex)

Postby elwesso » Fri Apr 08, 2005 5:23 pm

I dont really think anything will compare to what the G50 was.....

yet another reason just to keep it.. yb the time I can get a Y34 or Y50 I will be able to keep my Q anyway.....

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Re: Maybe, but maybe not (Rex)

Postby szh » Sat Apr 09, 2005 10:51 am

Rex wrote:I just feel the 03-04 M45 was less about luxury and more about performance, much like the 90 Q45. IIRC, Infiniti was launching the M45 to be a killer in the $40k sports luxury sedan going after the non-M 5 series BMW. It's not purely the similar body lines, though those seem obvious, it's the spirit it embodies.
I would agree totally with this. I get the same "feelings" (so there! ) when I drive the 2003 M45 compared to my original purchase of the 1991 Q45 (in spite of some dulling of memories over time).

Drive one and you will definitely understand!

Z

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Q45denver
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Re: 2006 M45 vs 1990 Q45 (911/Q45)

Postby Q45denver » Sun Apr 10, 2005 7:02 am

Any truth to the story that the new Y50 4.5 engine uses an excessive amount of oil and cokes the valves?

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maxnix
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VK45DE oil consumption (Q45denver)

Postby maxnix » Sun Apr 10, 2005 2:12 pm

Excessive oil consumption is reported with a small minority of VK45DE. Sorry state of Nissan NA response is some owners have to live with it while others have half measures offered. Q45tech attributes it to improper seating of low tension rings used to reduce internal friction or random colinearity of rings gaps.

Never heard of the coking problems in any Nissan engine.

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elwesso
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Re: VK45DE oil consumption (maxnix)

Postby elwesso » Sun Apr 10, 2005 2:42 pm

I doubt cokeing would be a problem, esp if you get it up to the redline every so often... any valve deposits due to oil consumption would be due to valve stem seals leaking and thats apparently not the problem..

If you notice they reduced the HP from 340 to 335, maybe that 5 HP is in better piston rings?

The problem is in the rings i guess...

The VH45DE still remains the king of nissan V8!

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maxnix
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Re: VK45DE oil consumption (elwesso)

Postby maxnix » Sun Apr 10, 2005 2:58 pm

Just looking at VK45DE in FSM and noticed there are no HLA, but rather shims under the camshafts which act directly on the valve stems.

The 335 hp reflects a minor reprogramming where they lessened the torque peak but increased the area under the curve. One reson why Y50 performs so well.

VH45DE still has the best bottom end.


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