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[bf2002flht]

S7S crate 124HC, no mods yet.

[Rooster]

What is causing that dip? looks like the AFR line shows it in the same place. Other than that, looks great.

[LC110]

Would run even better with a smaller throttle body. IMO

[hrdtail78]

What is causing that dip? looks like the AFR line shows it in the same place. Other than that, looks great.

Cam and compression.  Intake closes at 60.  Take it to 11.4-5 and it would be over 100 at 2500 and over 120 at 3000.  BUT that cam isn't going to ever do great at 2000.  Could just start the pull at 2250.

I think it looks great.  The pipe is giving that nice flat curve I am use to seeing.

[Para Bellum]

What is causing that dip? looks like the AFR line shows it in the same place. Other than that, looks great.

Agree; the AFR dip (into richer) occurs in both cylinders at the same point as the TQ dip.  Makes you say "hmmm."

Take it to 11.4-5 and it would be over 100 at 2500 and over 120 at 3000.

TQ is already at ~108 at 2500 and ~123 at 3k, so it's exceeding the numbers cited.  I wouldn't question it if the TQ curve just rose slowly in that region; instead, it's got that big dipper.   

[bf2002flht]

Agreed, more compression is needed. In the next month or two when the snow starts to fall, I am having Frank at Dragos do the heads, with new pistons and cylinder hone/bore for correct sizing. Cant wait until the snow starts to fall, then melt away!

[hrdtail78]

Agree; the AFR dip (into richer) occurs in both cylinders at the same point as the TQ dip.  Makes you say "hmmm."
TQ is already at ~108 at 2500 and ~123 at 3k, so it's exceeding the numbers cited.  I wouldn't question it if the TQ curve just rose slowly in that region; instead, it's got that big dipper.   

Then it might be higher with that pipe.  What we are seeing is a true WOT run.  Meaning that the bike is held at 2000 w/ throttle being held WOT.  Only thing holding it back might be throttle progressivity table.  This can be seen by the curve starting down by zero and making a straight line up.  Not a fan of the 66 and closing the blade more might help, but it is huge and doesn't help velocity at low speeds with how the back wall is pretty flat and the big belly on it.  Like I stated.  Start pull at 2250 and we wouldn't be talking.

I'd bet if acceleration table were to be zero'd out.  Dip in fuel would go away.  I would say holding the bike at 2000/ WOT and releasing the brake isn't helping because accel table is dependent on RPM accel as well as throttle movement.    ......and you won't ever be able to do that on the street.

[bf2002flht]

We'll see what spring has in store for us??? Also, I am almost never under 2500 RPM's and you couldn't tell by riding it, only the sheet. I am very happy with the linear power where I ride, no surprises. And a warranty!

[DRAGO B W]

We have the fix for those 124 S&S motor. 3 mm rings no more Pistons slap. Or oil issues.
And more power and torque.

Agreed, more compression is needed. In the next month or two when the snow starts to fall, I am having Frank at Dragos do the heads, with new pistons and cylinder hone/bore for correct sizing. Cant wait until the snow starts to fall, then melt away!

[bf2002flht]

We have the fix for those 124 S&S motor. 3 mm rings no more Pistons slap. Or oil issues.
And more power and torque.

I know Frank, I'm just waiting for winter to hit here in Reno. Go Punisher!


Sent from my iPhone using Tapatalk

[Para Bellum]

We have the fix for those 124 S&S motor. 3 mm rings no more Pistons slap. Or oil issues.
And more power and torque.

What size rings do they come with?

[Para Bellum]

Then it might be higher with that pipe.  What we are seeing is a true WOT run.  Meaning that the bike is held at 2000 w/ throttle being held WOT.  Only thing holding it back might be throttle progressivity table.  This can be seen by the curve starting down by zero and making a straight line up.  Not a fan of the 66 and closing the blade more might help, but it is huge and doesn't help velocity at low speeds with how the back wall is pretty flat and the big belly on it.  Like I stated.  Start pull at 2250 and we wouldn't be talking.

I'd bet if acceleration table were to be zero'd out.  Dip in fuel would go away.  I would say holding the bike at 2000/ WOT and releasing the brake isn't helping because accel table is dependent on RPM accel as well as throttle movement.    ......and you won't ever be able to do that on the street.

Thanks for breaking it down.  Yeah, I had wondered about the pipe, since we usually see good results with the Dragula, and about the 66 for low speed drivability.  BTW, how can we tell from looking at the dyno sheet that it's a true WOT run w/ brake hold?

[FlaHeatWave]

We have the fix for those 124 S&S motor. 3 mm rings no more Pistons slap. Or oil issues.
And more power and torque.

Are you using the nitrided oil rails also?

[hrdtail78]

http://www.cvoharley.com/smf/index.php?topic=109484.0

First sheet in the post was holding rpm by brake and released.  The second was holding rpm with throttle and then opened.  The difference can be seen at the beginning and where the power starts.

[Para Bellum]

http://www.cvoharley.com/smf/index.php?topic=109484.0

First sheet in the post was holding rpm by brake and released.  The second was holding rpm with throttle and then opened.  The difference can be seen at the beginning and where the power starts.

Got it.  Thanks for that.