[TrX450rKiD]

If I were to put in a 14:1 piston, cams, and a port job, do you think the EFI will adjust with no problem? I don't know too much about EFI so give me your .02.

 

[MXQuadRacer]

You will definitely have some tuning to do with those kind of mods...I'd suggest it even with a pipe/filter combo *If this machine is like any other fuel injected machine ever made*

Question though:

Why so high on the compression? 14:1 is getting way up there

 

[TrX450rKiD]

You will definitely have some tuning to do with those kind of mods...I'd suggest it even with a pipe/filter combo *If this machine is like any other fuel injected machine ever made*

Question though:

Why so high on the compression? 14:1 is getting way up there

More compression = more power And I know a guy that may have some pistons out for the LTR soon and he will have 14:1 available.

Would I just bring it to the dealer to have it tuned?

 

[MXQuadRacer]

Dealerships normally don't "support" fuel injection tuning, it's normally an aftermarket part that does this (Power commander).

If the power commander system is how the LTR does end up working - You'd have to buy a power commander and do it yourself, or bring it to a different mechanic shop and let them do it

Another thing - Once you get over the 13.5:1 compression ratio, those motors start running way hot. If you set it up right 14:1 will run great, but you're going to have to keep a close eye on that cooling system

 

[Rich S]

I thought I read about a "yoshimura" chip being availble. if thats the case.... then I'm sure the yosh tuning software will hit the street in a stolen, copied or similar version along with the maps. when that happens..... then only limit will be the tuners limit. And having it as an ECU system, for the money, a person could run something like Haltec, Motec, Autronics, HydraEMS, SDS, etc etc. but with those you'll have to permanetly have to mount an O2 sensor and a MAP or MAF sensor.