My 06 R dyno

[parker313]

Here are the results from my dyno test. I was surprised to see 74 HP. Upgrades include Python 3 slip ons and SE a/c.
Carb rejetted to 175 main jet.

[cgp-1200R]

Nice , I wonder what a stock 06-R gets

[NRHS Sales]

what were you expecting?

[parker313]

I was expecting high 60s for HP. 74 was more than I was expecting.

[aka_Matt]

u pulled 126mph @ 9.4 seconds... what kinda dyno chart is that??

[smackie]

looks like your top end is too lean..around 15-1. no offense but your AFR sucks.

[Takingabreak]

What is max power? Is that Toque or Horse power?

[CBAS5]

The speed of 126.4 mph on the dyno makes me pretty sure it's a 5th gear run. I think a standard 4th gear run would show a little bit less hp. Looks pretty good overall. You may want to put the 180 main back in there though.

[parker313]

Would going up to the 180 main fix the lean AFR? Any thoughts on going up more than 5 on the main jet? It's at 175 now.
Thanks.

[smackie]

even if its not enough its still better...
NRHS wanna chime in in this?

[Phelan]

My 1200S had an AFR of about 13:1 on top when Dynoed at NRHS, with a 185 main jet.

[NRHS Sales]

You are dangerously lean on top. A 185 is probably about right

[aka_Matt]

not to steal this thread, but my afr was 14:1 from 3000 to 5000, then 13:1 at 5500, and 12:1 at 6000, does that mean my air cleaner may be restrictive?

[CBAS5]

not to steal this thread, but my afr was 14:1 from 3000 to 5000, then 13:1 at 5500, and 12:1 at 6000, does that mean my air cleaner may be restrictive?

It means that something was restrictive at the upper rpm. It doesn't point to anything specific. It could be the air cleaner, the exhaust, heads, cams, etc. There are many possibilities. The easiest way to find out if it was the air cleaner that was restrictive is to run the next run without the A/C and see what happens.

[mstngjoe]

It means that something was restrictive at the upper rpm. It doesn't point to anything specific. It could be the air cleaner, the exhaust, heads, cams, etc. There are many possibilities. The easiest way to find out if it was the air cleaner that was restrictive is to run the next run without the A/C and see what happens.

How is it that the a/f ratio indicated at the higher rpms reflects a restriction?

If we were to see a leveling/drop off of power I could understand your statement....but the a/f ratios @ rpm that he (aka_Matt) is reporting seem very good to me.

[aka_Matt]

How is it that the a/f ratio indicated at the higher rpms reflects a restriction?

i figure that if it goes rich like that, its not getting enough air at high rpms... had i seen that while it was being dyno'd, i woulda had them take the cover off the air cleaner to see if it made a difference...

[CBAS5]

How is it that the a/f ratio indicated at the higher rpms reflects a restriction?

If we were to see a leveling/drop off of power I could understand your statement....but the a/f ratios @ rpm that he (aka_Matt) is reporting seem very good to me.

A dyno run is WOT, which relies exclusively on the main jet. If you see it get richer with rpm's, then that means that it's flowing less air up there so something is restricting the air flow. That doesn't necessarily mean you should worry about it (unless it gets really rich).

[Gone]

More likely a dyno error. The hp is too good to reflect such an extreme restriction as the A/F alone would indicate. That much of a shift would mean it was starving for air and hp would have dumped.

[mstngjoe]

not to steal this thread, but my afr was 14:1 from 3000 to 5000, then 13:1 at 5500, and 12:1 at 6000, does that mean my air cleaner may be restrictive?

So as not to hijack further, maybe you could post your dyno sheet in your other thread and we could see what's going on with the hp/tq curves as they relate to the a/f readings.

http://xlforum.net/vbportal/forums/showthread.php?t=64348&highlight=dyno

...but my afr was 14:1 from 3000 to 5000, then 13:1 at 5500, and 12:1 at 6000....

I wouldn't want to draw any conclusions from just this info alone.

[parker313]

I'll find the time and put in the bigger main jet. Probably start at 180 and see if it needs the 185.
Thanks for your help.

[whittlebeast]

looks like your top end is too lean..around 15-1. no offense but your AFR sucks.

What he said.... Never go back to that dyno operator. He should have called off the pull as so as he saw the 15:1. Way too lean on top.

AW

[parker313]

It was a freebie given for donating blood, not a full dyno and carb adjust.
Of course I couldn't actually donate blood since I returned from Iraq less than a year ago.