Andrew Martin (Offline)
#1
3/27/14 8:19 AM
Hi everyone.
I have an R1 on alcohol with Rosson injection and a power commander 5. Has great top end but seriously lacks on a restart. Does anyone know if the electronic throttle set up kills these engines or should I be looking elsewhere.
Thanks
Duke17 (Offline)
#2
3/28/14 7:32 AM
We run a Kawi 636 with electronic injection and it works awesome.
Sounds like it may be over-fueled down low in the rpm range. Have you put the car on a chassis dyno to tune it? If not, that would really be the next step. That way you could really see what is happening with the injection and air/fuel ratio.
We use DC Chassis Dyno in Brownsburg, IN. Call Dan Pace at 317-607-7315. Tell him Duke sent you.
MC@Performance Fab (Offline)
#3
3/28/14 11:37 AM
Hi Andrew
The R1 motors thru 08 all lack torque, the 04-06 R1 is the worst of the liter class for torque and the 07-08 isn't really that much better. In 09 they made a huge change and now have plenty of torque but lack HP on the top. All of the small bore, high revving bike motors make only half the torque compared to HP so its not hard to see where one would need to look to make big gains in performance but here's the deal. Your never going to make a one size fits all velocity stack such as Rosson uses on these motors work, its just not going to happen. Cheaper to make, yes, but its just never going to work properly. You might want to give Brody Stewert a call at 618-305-4245, he's just tuned a 08 R1 powered minisprint with a proper intake setup made specifically for that motor.
Monte
Andrew Martin (Offline)
#4
3/28/14 4:33 PM
hanks guys
It has been on a chassis dyno.
MC@Performance Fab (Offline)
#5
3/28/14 11:23 PM
Do yourself a favor, give Brody a call.
leaglen (Offline)
#6
3/29/14 1:11 PM
I dont know about the R1, but on the R6 if the TPS sensor was bad it would do that.
Andrew Martin (Offline)
#8
4/2/14 7:49 AM
Thanks again everyone.
We wanted to try a new velocity stack. Will have to stay up late and call Brody. I'm on the other side of the planet (Australia). We aren't allowed to change gears although I'm sure many do.
Andrew
Andrew Martin (Offline)
#9
4/2/14 7:51 AM
Also when we got the car it had an 11 tooth front sprocket so it ran in 4th.