Falcon had some good points about the Fuel Injection being the best invention......well i figured id make a new topic

heh very true. however, id like to see a dyno between the f4 and f4i all decked out.....f4 w/ jet kit, full exhaust, K&N filter charger, and maybe some Erion/Crane Cams......vs the F4i w/ the PC, same full exhaust, same filter, and same cams.....I wonder would would produce the most power....

 

F4i all the way!

 

I'd smoke your azzz.....

 

Bring It!

 

Does anyone have dynos of the two bikes? Even magazine dynos....

 

Sunday
North Carolina
You're ON!

 

DONE! see you then, bring your block, cuz If i win, which i will, im taking that block home with me.

 

sure, I'll just strap it to the tank. Think it'll get in the way?

What do you think, like 3PM. Outer Banks?

 

you pick you defeat. hehe

 

I've been meaning to ask you, what's with the name change? You a big fan of late 90s rap?

 

what's with clash of the titans all up in here? Don't f4s make more power in stock form that f4is?

 

Just a little interstate **** talking. I think the f4i has 2 HP more. Someone said that somewhere.

 

2000
F4
HP (kW): 110.00 (80.3) @ 12500
Torque - Nm (kgf-m / ft.lbs): 68.00 (6.9 / 50.2) @ 10500

2001
F4i
HP (kW): 109.00 (79.6) @ 12500
Torque - Nm (kgf-m / ft.lbs): 65.00 (6.6 / 47.9) @ 10500

 

oh yeah, i changed my name because I havent had a Seadoo in a couple years, and at the time, i couldnt think of anything else, besides my nick name.....

 

Thanks mase, I thought the f4s made more.

 

hehe no prob.

Kyle, ****, Ill even put your block(soon to be mine) on the back of my bike and still own you.

f4i what?

 

i wonder if the horsepower difference is due to the current required to run the computer....im sure the F4i has a bigger stator than the F4.

 

not likely. the fuel map in the f4i is probly more emissions friendly, thus sacrificing some power. modern microprocessors consume less power than a turn signal light bulb.

 

Falcon is right, microprocessors dont take much power at all.


Sincerely,
Mr. Cheap Bling

 

i should have worded what i said differently, i meant the engine management as a whole, not just the ECU. Namely injectors and coils which the ECU just activates relays to control.

 

in any case, i bet you can probly gain back that power differential (and then some) by remapping fuel and timing maps. i think this is what the Power Commander products do.

the current draw of the engine management is most likely under 10 watts, including the injector drivers and all ancillary devices. since 1 horsepower = 745watts. I believe the additional draw on the electrical system is negligible.

 

hehe yes, Power Commanders do allow you to modify the fuel and timing curves...however, rejetting the f4 will give you more power as well.....

 

yes, a Power Commander, or a MOTEC

 

yeah you can tune a carb for more *peak* power, actually as i understand it you can adjust basically 4 ranges of the rev range from idle to WOT with a carb.

fuel injection allows much more granularity than that. you typically have upwards of 15-20 individual load rows to tune across varying load/throttle positions vs engine rpm. so you end up with 150-200 individual cells to tune for all engine speeds and loads.

idle speed screws, needles, shims...or a computer. i'll take the computer, thanks.

Mr. Cheap Bling - fuel injection is better than carbs on any bike, not just the f4i. just deal with it.