06 21v launch 5.7 Indmar Engine upgrade

[Turbinesurgeon]

Has anyone tried a tune to upgrade between a MPI 325 to MPI 340?

Based on the spec the motors look exactly the same, aside from the max RPM. if that's the case, you should be able to unlock some extra HP on the top end with a tune. I found this tuner that claims to do the job.

https://www.magnumtuning.com/en/deta...ssault-325-mpi

It would be interesting to try although I'm not sure if I'd what to be the guinea pig, but maybe there is someone out there braver than me .

Dave

Come on Dave, don’t be afraid to be a Guinea pig for the Supra team

This is interesting, website claims 17% power increase taking the Indmar 325 to 380hp and 340 to almost 400hp. I have a 2006 340 in my boat. I believe the differences are intake, throttle body, and computer.
My concerns are the longevity of the cats. I’m not an expert in tuning so I’d want to make sure this didn’t shorten the life of the cats being how expensive they are to replace.


Sent from my iPhone using Tapatalk

[MJHKnox]

Someone on social media was asking about a tuner made in China for $3-400 and wanted to try it on a Raptor Motor that was out of warranty.

Basically everyone was like: "go ahead and let me know how it goes"