tuners

[baja555]

Has anyone here tried Diamond marines exhaust tuner on a 280 ? do they work well enough to make it worth it?

[tux974]

Yes, they do!
It is not just the tuner. It is also the mod they do to your exhaust plate that really makes it come alive!
It is a proven piece!

[Frank Molé]

yes it was made/tested on there p/h dyno......................it does work........................


Performance 2.5 Liter Tuner
This Tuner produces a great compromise of LOW END, MID RANGE and TOP END horsepower. It is made from mild steel Tig welded construction, which is then Ceramic coated to hold in heat and make it corrosion resistant for a lifetime . The final assembly process bolts the tuner to the exhaust adapter together using 12 point ARP stainless steel 170,000 psi bolts that are then safety wired to make a bulletproof combination.
Typical Horsepower gains for a 2.5 Drag would be 3-5 Hp for a 2.5 280 Offshore 5-7 Hp and a 2.5 260 would range from 7-10.
They work equally well on single as well as Offshore twin and triple engine applications.
Price is $675. We will need your Exhaust adapter sent to us for welding, porting, machining and final assembly. This is not a bolt on replacement; there is a substantial amount of work involved in this.

http://i200.photobucket.com/albums/aa158/frankmole/diamondtuner.jpg:thumbsup:

[Bies]

? Why is one section longer????

[patchesII]

Because the cylinder banks are staggered. Keeps the same length exhaust for both port and starboard sides of the motor

[baja555]

Has anyone used them ?

[tux974]

Has anyone used them ?

I have! Jeff from Freeze Frame, Frank Mole. Maybe some others may come on here and post.

[baja555]

thanks tux, did you lose any low end with them?

[tux974]

thanks tux, did you lose any low end with them?

No, because it was used along with some of their other motor mods. It actually complemented and helped get the most out of the motor. Just like when you get a drag motor from Mercury. It comes with a drag style tuner. Some say tuners do not make a difference and I may agree to an extent but there is a reason why even Mercury sends motors out with different tuners.
I would call them direct and get their input. If you have concerns about losing bottom/performance and they say it will not have them put it on paper for you.
BTW, I like to also say I do not think someone would put that much time, effort, machining and work into something if it did not wield better performance. JMPO!

[baja555]

Thank you.. I have a pair of 280's on a skater and I want to do intake spacers , tuners and bump the compression some..

[tux974]

Thank you.. I have a pair of 280's on a skater and I want to do intake spacers , tuners and bump the compression some..

Anytime! Hope I answered some of your questions and concerns.
IMPO, Diamond is the place to get your 280's to perform at their absolute best!
They are also very familiar with Skater performance and setups.

[Frank Molé]

Thank you.. I have a pair of 280's on a skater and I want to do intake spacers , tuners and bump the compression some..

that sounds great,but take it easy on more comp....you will have to use some race fuel.......mine is ported with stock heads,so it has less comp.than stock and still pulls like mad...................:thumbsup::thumbsup:

[baja555]

what kind of porting do you have done Frank? I heard you can go to 150 - 155 psi comp..