Well I finally finished putting 500 miles on my conversion so I went and had it dynoed.

I have attached the dyno runs in a pdf file I sure hope that this works.

As you can see from my signature it has all the good stuff, I think. Should I be happy with the results?

The torque curve looks good to me and so does the HP curve, just on the "low end". I think I have a little exhaust pipe reversion going on around 2700 to 3500 RPM. What do you guys think? I was just looking for more, that's all. You know that old "with that build you should get 90 to 95 RWHP" deal.

It's hard to see but the A/F ratio is pretty steady at 13.5 across the board. Stock CV with a 45 slow, 175 high and a N65C needle no shims, got lucky there I guess.

They played with my Twin Tec unit, I haven't had a chance to see where they ended up at they said that they made adjustments to the two dials. By the way I had one of Turbos maps to start with.

So here's the deal what would be my next move to get to the higher numbers.

hows the bike feel? i wouldnt look at numbers alone. does it leave a smile on your face?

unless the correction figures r way different, i think u should be making way more with the heads and cam... it looks ok for just cams, but i made 79hp with stock cams/heads... try using the stock head pipes with slip on mufflers... the guy who dyno'd mine says they give the best results...

I wonder if this should be in the NRHS forum?

Anyway, I think those numbers are low for that combination. The first thing I would do is try a different exhaust.

BTW, I have a buddy who lives in Beecher, where Valley Racing is :)

--Chris

I'm thinking 13.5 is a bit lean for max power

Try a 180, 185........

Why did they roll-off at 6,000 RPM? The E-cams should have a wide enough torque curve to keep climbing. With what you had there, they might have gotten another 5-10HP out of it.

What other figures do they get out of that DYno ..... ie : are all other bikes lower than other dynos????


One can't compare apples to oranges.......

Different dynos read differently ....

forget the piece of paper.....

How does it feel?????

Does it put a smile on ya dial...?????

I looked closer at the A/F ratio.

Looks like at the richest it's 13.5:1 otherwise it's over 14:1 which is too lean for max power....

Why did they roll-off at 6,000 RPM? The E-cams should have a wide enough torque curve to keep climbing. With what you had there, they might have gotten another 5-10HP out of it.

The first two pulls were his base lines. I gave him the bike with the rev limiter set at 6000. He ran the bike and set it to 6500. From my own perspective increasing the rev limit passed 6500 would gain very little, the torque curve is already nosing over and I don't think it would come back up. Plus do you honestly think this bike will pull 5-10 more HP in 500 RPM?

The A/F ratio is hard to read at best, Brian at Valley Racing explained that it was pretty steady at 13.5 which is what he likes. Considering that it is an everyday rider type bike erring to the lean side may increase HP but also may cause excessive heat problems. And again how many horses will I get?

All good advice guys but what are your thoughts on those cams? Holding it back or is it something else.

Stage 1 H-D .551 cam dyno is showing close to 80 rhp with stock heads. I'd think it was too lean at 13.5 and above. Wouldn't 12.8 - 13 A/F be more powerful? A .45 pilot is way too lean on my 1200R with stock heads (9.8 to 1). I'm looking for more power than that with just a cam change. Never really liked the V & H for making big HP either. As Stevo said apples to oranges! Ya got a drag strip close by? Take it and run it with what ya got. Then put in a .48 pilot and see where yer at. I'm guessing it's gonna pick right on up. Then try the main at 180. Only make one change at a time and then run it. After that play with that fancy ignition box (one change at a time). I'd rather rely on ET than seat of the pants feel. With HP and torque increase you will see MPH increase even if you're not a drag racer. ET can be the same with a couple of MPH increase and it's makin more power. Poor mans dyno. Might take you a few runs but you can have fun while saving some coin. Get it where it runs the fastest with what ya got. Then you have a baseline for future modifications also. All parts are advertised as great, sometime they are not! Ever look in a racers garage? Lots of latest, greatest, that wasn't.
Dave
Live to Ride!

Conversion dynoed, should I be happy?
Yes, you should be happy the bike is back together and runs well. There's always more tuning that can be done, and we always want more power, but if it runs smooth, makes power and puts a smile on your face, just ride it and tweak as you go.

--Chris

Personally, I would not be happy with those number considering the work you put into the motor. 83 hp is low for 1212 cylinders, compression of 10.5:1, stage two heads, and SE .551 cams. Stage 1 bikes are producing 74-78 hp with a lot less work.

Did you dyno the bike before the conversion? The reason I ask is maybe it's a low reading dyno. If the dyno reads low by 8% (which is possible as far as I know) then your hp would actually be 90. That would be much better for that work.

I wouldnt be thrilled with those HP numbers but they arent bad at all. (torque looks pretty solid) I was hitting 80 hp and 72 ft lbs of torque with CS slip ons SE intake and 551 cams. (mikuni as well, but that wouldnt make a differance at that level). i would expect a little higher. but a two into one i think would really make a differance for ya