hey JHON1L40 where are you at in the world?

 

I live in Vacaville California.

 

I just thought I bring this thread back from the dead to let everyone know how the first COT test went with my boat.

I was unable to scan (my MPVI cable is nor here yet), But I kept a close eye on the exhaust temp gauge and the wideband.

At 65 mph with around 30% throtle pulling one of the stepper sections of doner (5% grade for 3 mile) my exhaust temps ran right up to 1500 deg, wide band dropt to about 13:1 and the exhaust temps stop climbing and begain to come down. This was with the boost set at 5psi. I'm pretty happy with the results. and once I'm able to scan again, I'll fine tune the C.O.T. in my "tow tune"

 

Now that I removed my STS kit, the EGT's are down in the 1000 range. With the STS kit I was in the 1500-1600 range. I eventaully had to have Nelson modify my tune to get the EGTs down, but it killed about 40% of my power.

 

13.1 on the wide band while towing is BAD!! You need to be a lot richer than that if you want your engine to survive. I have been playing with my meth injection and I have got my EGTs down to 1500 to 1550 on a long pull, as much as 8% grade. My wideband on these pulls stays right around 11.9:1. To have a safe tune it does rob some power but it still had a lot more than stock.

 

Ya I know that 13:1 is bad but it is ALOT better than 14.68, I still have some fine tunning to do, but now that my new mpvi pro is here, I think I'll just go 2bar.

 

speaking of boats... look what fell off the merc racing truck in my front lawn