GSX1400 dyno graphs

[FROSTY:Me]

my take on the graph---shift at 7k till in top--not much point revvin her out shes out of the best power delivery

[beyond]

my take on the graph---shift at 7k till in top--not much point revvin her out shes out of the best power delivery

Exactly Frosty. Ride the torque and power wave. Shifting at 7k gives the best progress.

[bikerboy011]

How much did the dyno run cost you? as am planning to do a tune and a custom map once i get the headers and PCIII.

[cowpoos]

Only Suzuki (or maybe Hardley) would need 1400cc to get 95 hp

Well as a matter of fact...my guess would be that the dyno that was used would have been a factory pro?? not a dynojet make shit up and add unwarrented large bullshit corrections to every thing inertia dyno...

So the figure he has been given is a really one...based on the engine being loaded...rather than mathmatical theory and marketing [people love the big figures that dynojets and other similar dyno's spit out!!]

and at the end of the day its a comparitive figure anyway.. a basis for further tuning and refinment of the engine. and as Dan notes the tourque figure is very important....as Horse power is mearly a calculation...not a actual physical force.

[jrandom]

Well as a matter of fact...my guess would be that the dyno that was used would have been a factory pro??

FactoryPro EC997a, apparently. Plus something called an Integrated Hi Speed EPA Spec 4 Gas Exhaust Analyser. Which is what the bottom line on the graph's all about, I guess.

[TripleZee Dyno]

How much did the dyno run cost you? as am planning to do a tune and a custom map once i get the headers and PCIII.

Hi
Generally speaking mapping a PC you would be looking at a minimum of $360
That would get the map pretty good but there will be areas that may need a bit extra work. If these areas dont look as if they will be a problem on the road then we dont worry about them. Unless you want us to.
You can never actually get a map 100% perfect, only better than it was.
But considering the factories put 1000's of hours/$$$ into it without quite getting it right, we do OK.
Just give us a ring whenever if you have any questions, queries etc
cheers
John

[TripleZee Dyno]

Those charts show that there is little value in the BMC compared to the stock air filter.

And torque surfing surely is a wondrous thing.

We would normally expect 1-2-3 hp through the range but in this case not a lot of difference. Even the gains down low are probably due to tuning to suit the exhaust. With max torque around 4 1/2 I would imagine (I havent seen inside one of these motors so I dont actually know) that ports valves and cams would all be pretty conservative and it is likely something in this area is the choke point rather than the aircleaner. Aftermarket filters would probably come into their own if cylinder head work was done.
Check this out. The M109 is bog stock.

[Sully60]

Check this out. The M109 is bog stock.

Wow, those curves are amazingly similar for two very different machines!

[Max Preload]

...as Dan notes the torque figure is very important....as Horse power is mearly a calculation...not a actual physical force.

It's not merely a calculation. Horsepower is effectively the rate at which torque is delivered, without which the torque value is meaningless.

[jrandom]

A quick update to this.

I've had the bike back on the road since last week for the first time since the tune.

The fuel economy seems to have improved a solid 10-20%. I'm now getting a reliable > 300km per tank from highway cruising and > 250km per tank around town.

Boo-yah!

Thanks, TripleZee.

[The Stranger:Me]

A quick update to this.

I've had the bike back on the road since last week for the first time since the tune.

The fuel economy seems to have improved a solid 10-20%. I'm now getting a reliable > 300km per tank from highway cruising and > 250km per tank around town.

Boo-yah!

Thanks, TripleZee.

Yes, interesting to note that you can get an improvement in fuel economy along with that improvement in power.

All my mods are justified as fuel economy and/or safety mods.

Mind you with the XT adding a power commander, air filter and pipes really has improved economy significantly.