Depends on the intake you are running. When I ran the 38R with a 6637 intake, it drove me nuts over long distances at a constant RPM. I now run the S&B enclosed intake and it makes it much more manageable.Is the sound it makes disturbing and an annoyance on long trips when towing?
They are not laggy like a D66 turbo, but still more-so than a stock SD turbo with a .84 housing. They were a non-wastegated design, so to get drive pressures in check, a later spool is the norm.I've found that with tuning and a billet comp wheel they spool pretty fast.
The turbine wheel is larger on a van turbo as well.
If you don't like to turn the radio up, a 38R may not be the best choice for you then.Wife & I tow a travel trailer, sometimes long distances, so quietness is golden for us.
Under a load at 1800-2000 RPMs, is the whine/noise of the 38R noticeable? Thanks in advance
You can do that. Another option is to use a billet wheel in the GTP38R. This quiets it down a bit. The downside is that the 38R does not perform as well with a billet wheel compared to the stock cast wheel. So you are decreasing sound, but losing performance too. I opted to deal with the sound.Do not usually play the radio when towing. Perhaps the van turbo or another stock turbo might be a better option for us when the time comes for replacement.