Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 10, 2025 ...

Craig,
It is nice to be able to run the way we are comfy as to speed and ability to keep up or pass at will that only comes with enough power to get it done, For me, the resonator was the first step (a wake up to the new found power). For those who feel the resonator does not work due to many dreamed up issues, I wish them warm smoke blown up their dress. The second step

Craig,
It is nice to be able to run the way we are comfy as to speed and ability to keep up or pass at will that only comes with enough power to get it done, For me, the resonator was the first step (a wake up to the new found power). For those who feel the resonator does not work due to many dreamed up issues, I wish them warm smoke blown up their dress.

The second step was the change from the 450HP @ 1450 Torque to the new 500HP @ 1550 Torque.  That is when the big wake up came into play, with the added 100 ft lb torque, that feels like a lot of HP kick in the butt, pull out and pass cars & trucks on big hills while towing the Ford P/U.  I know it is capable of better mpg, but fuel is the cheapest part of a coach, so I enjoy the getter up and get it done, sure beats the slow lane and being trapped.
Enjoy
Dave M

Chuck,

No, was just having some fun! Actually, the 6V-92TAs are used in boats with 525 to 550 hp with as much as 614 hp using a couple of turbos. The TBO (time between overhaul) is usually at least a couple of thousand hours with turbo failure more likely than engine failure. Here is a quote from a 6V-92TA boat forum owner with a couple of 550 hp 6V-92TAs:

"I had the 550hp versions in a 92'45' vilking convertable.Despite some of the negatives said at times about these older Detriots' mine were flawless-never had a single problem.If I remember right I cruised at 24-25knts burning roughly 40-45 gal an hour.Cruised the boat from the mid-atlantic to Stuart fl twice and put significant hrs on the motors. When I sold it I had close to two thousand hrs-good compression and very little smoke-only on a cold start and getting on plane.Get a survey and adjust offers based on findings-good luck."

This is only one of a lot of great reviews for this engine that I have come across. I have absolutely tortured Detroit 2 cycles since 1967 without a complaint. Almost half of our responses were with dead cold engines (no block heater) to full throttle and out to 2400 rpm within several seconds of startup. Made me a real believer.

They were the engines of choice in sport fishermen for a lot of years. Most of the reviews have been really positive with some posts pointing out issues that our members using the same engines may want to consider. Sort of accelerated wear testing with this much horsepower.

Other marine engine forums are also out there featuring CATs and Cummins. Interested members may just search with Google using keywords like CAT, forum, marine, boat, etc. Here is the forum I lifted the quote from: 6V92 Detroit Diesel? - The Hull Truth - Boating and Fishing Forum

Can't imagine your Banks Stinger kit having any effect on engine life.

Pierce

A question:  How do you increase the HP on an ISM from 450 to 500?  Can a similar increase be done for my ISL (400HP)?

The point I forgot to make is the fact that you can't have it both ways, more power and less fuel consuption.
I am happy with the better power and the ability to back off and burn less fuel,  you just can not get both at the same time 

towing the F150 with the Can AM 800 two seat ATV, my VMSpc claims I got 8.2 going out via the no mountains route  By the time I got home it was showing 7.9 mpg,
Dave M

Dean, 
 If you ever headed south on I-95 to Fl, you would be amazed at the good mileage, assuming you ran 65-70 mph.
Dave M

Another small point, I find using the cruise control does burn more fuel than using my foot on throttle. 
Dave M