Quote:
Originally Posted by Jordo!
^^^ They won't last as long...
Why the switch? Any differences in how it runs?
|
They'll last ~30k miles. I don't want a spark plug in my head for over 50k miles PERIOD.
I switched because w/an upgraded oil cooler the stock heat range of 8 is to cold. It runs the same and I'm receiving combined ~17 MPG w/my 4.30 final drive.
Quote:
Originally Posted by Nuccigucci
Not to bring resurrect an old thread but I think the reason why the vq37vhr uses basically the same plug and the vr38dett is that our engines are high compression and the vr is boosted which brings up compression
|
I agree w/this.
The VQ37VHR (11:1) uses the same plug cuz it runs hot in OEM trim. No oil cooler OEM 'till 2012 and then still inefficient! The VQ37VHR compression is 0.4 higher than the VQ35HR (10.6:1).
The VQ35HR uses a 7 heat range plug and doesn't have an oil cooler OEM -which I'm sure runs hot too.