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Post by Lou on Aug 18, 2015 0:19:17 GMT -5
The sound Walms...wow!
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Aug 18, 2015 2:54:06 GMT -5
It was a tough dyno, but the results were all "in line" with each other. John (dyno guy) was being respectful of our bikes to some degree - I asked him to chop at 7500 RPM and the power curve was still climbing, so there was probably 3 or 4 more ponies available which would be 20+ more than the bone stock H2. It was amazing to stand behind the trailer and feel the "thunder". There was also a stock CBX that ran, an 1100 Aprilia, a Honda Super Blackbird and John's own ZX10R. Yes, Henry's bike was running Higgspeeds (narrowed and with silencers added). Ian: Would your 7500 rpm be at stock tacho, or a digital tacho either on bike or dyno? Reason for asking is that as far as I remember, you are running fbg pipes? And every stock tacho I have tried, shows about 10% too much vs my dyno tacho. If so, 7500 rpm is more like 7000. Your ported engine with fbg (if that is what you have) will peak at -> 8000 rpm. In that case, you have a lot more than 3-4 ponies left. I've say more like 10. Maybe more if jetting and ignition timing is good. Can I see your dyno sheet? Jørgen
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Post by Walms on Aug 18, 2015 4:00:58 GMT -5
I love it! it even had RB scratching his head! lol
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Post by zambia on Aug 18, 2015 7:28:14 GMT -5
Hey Jorgen - the tach was read via an inductive thing clipped onto the coil wire, I believe. My pipes are TNT's currently - timing is spot on and I am pretty sure the main jet is perfect because the engine is very happy at the higher RPM range. I don't have the graph but it is a pretty nice curve....we overplayed the stock H2 (stock pipes), and it made more power than mine from off idle all the way to about 5,000 where the lines finally crossed. It was interesting though, because the lines followed a very similar trajectory until 5K.
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Aug 18, 2015 8:03:53 GMT -5
Wow, TNT are even more revvy than fbg!!! You are in the 80-ties rwhp for sure! Mine revved to 9500!!!!!! You really should bring your H2 to a dyno again, you'll be surprised. Below is the TNT sheet for my H2, you see they revv to the moooooooon and gives GREAT power!Andpay attenion to the powr at 7000 rpm, WAY lower than eak power.In fact, I think you may be ry close to 90-ties or ->100 at crank. Not bad, with those tiny 34mm carbs. Jørgen
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Post by zambia on Aug 18, 2015 8:12:29 GMT -5
Haha - it will definitely rev to 9500...it's just nerve wracking to do that on a dyno when you were the last guy tightening the nuts and bolts! Not to mention an audience of 10 or 12 gear heads watching!
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Post by Walms on Aug 18, 2015 8:30:34 GMT -5
Peak power is good for bragging rights for sure but not really the end all and be all. The Clough pipe would have pulled to 11k but not sure if I'd bother as I'm finding high rpm's only cost more money and best left for the wealthy. The torque pipe beats it impressively well into the powerband for what is usable on the street. I can tell you after riding both pipes on the same weekend that the Clough pipe will be hanging on the rafters for a bit. Even if it has more peak power potential.
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Post by zambia on Aug 18, 2015 8:51:36 GMT -5
I have 38mm round slides
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Aug 18, 2015 9:03:39 GMT -5
Peak power is good for bragging rights for sure but not really the end all and be all. The Clough pipe would have pulled to 11k but not sure if I'd bother as I'm finding high rpm's only cost more money and best left for the wealthy. The torque pipe beats it impressively well into the powerband for what is usable on the street. I can tell you after riding both pipes on the same weekend that the Clough pipe will be hanging on the rafters for a bit. Even if it has more peak power potential. Definately correct for "touring" use. Why not have both? I have little to nothng experience with H1 motors, but at last a piston port power jetted ufoed H2 with great throttle response can do that as the power is almost double at all rpm's vs a piped and reeded H1.
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Aug 18, 2015 9:07:02 GMT -5
I have 38mm round slides Aaaaaa, my bad. Then ->100 rwhp is in your motor Ian. Give it a second chance and show what she is capable of. I bet she does VERY well. Piston port, right?
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Post by Walms on Aug 20, 2015 17:44:09 GMT -5
Peak power is good for bragging rights for sure but not really the end all and be all. The Clough pipe would have pulled to 11k but not sure if I'd bother as I'm finding high rpm's only cost more money and best left for the wealthy. The torque pipe beats it impressively well into the powerband for what is usable on the street. I can tell you after riding both pipes on the same weekend that the Clough pipe will be hanging on the rafters for a bit. Even if it has more peak power potential. Definately correct for "touring" use. Why not have both? I have little to nothng experience with H1 motors, but at last a piston port power jetted ufoed H2 with great throttle response can do that as the power is almost double at all rpm's vs a piped and reeded H1. Comparing an H2 to a H1 isn't really fair. I can buy a complete H1 for less money than a H2 motor. Plus you'll never get an H2 to handle as well as a 500 in a 400 frame. If you could find someone, he could actually still make the smaller bike out handle it... Life ain't all about going straight!
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jyrgnorway
2nd Gear
H2B CAFE, H2B, H1B, F8 BISON, Z1000ELR, RD500
Posts: 468
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Post by jyrgnorway on Aug 21, 2015 1:14:09 GMT -5
Definately correct for "touring" use. Why not have both? I have little to nothng experience with H1 motors, but at last a piston port power jetted ufoed H2 with great throttle response can do that as the power is almost double at all rpm's vs a piped and reeded H1. Comparing an H2 to a H1 isn't really fair. I can buy a complete H1 for less money than a H2 motor. Plus you'll never get an H2 to handle as well as a 500 in a 400 frame. If you could find someone, he could actually still make the smaller bike out handle it... Life ain't all about going straight! You are definately correct in a H2 does not handle as well as a 400 with a 500 engine. But I bet yours 400 with a 750 motor can handle as well as a 500 motor in a 500 frame? And you will have a lot more power in all rpm's, and peak power giving you earwax in your wide smile. And a rubber mounted 750 engine vibrates a lot less than a solid mounted 500 engine. A healthy H2 with stock cylinders, 34 carbs and good pipes produces 77-82 rwhp. Best dyno I did (82) was with Jollymoto. Doing some more work and putting om 38¨s and you are in the upper 90-ties. Do everything to the limits and you have 120, and still a lot better low and mid range power than any H1 if done correctly. Then you can put on Lectrons 40 or even 44 if your portwork and pipes are good, and you got more than 130 rwhp, still with good low and mid range. This winter I will build up my 72 H2. I will lift cylinders 1,5mm, do some minor modifications to inlet and exhaust and put on my NOS Figaroli 3:3. That package will reach close to 100 rwhp with a lot less work than you and I have put into our bikes so far :-D And a H2 motor aint THAT expensive if you find a object outside e-bay I believe. I payed 1200 US dollars for mine complete spare H2C motor here in Norway 2 years ago. ..j.
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Post by JA-Moo on Aug 21, 2015 2:52:23 GMT -5
750 ruins the handling of an S frame.......
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Post by Jim on Aug 21, 2015 8:32:39 GMT -5
...giving you earwax in your wide smile.. Eeeeewwwwww.
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Post by Walms on Aug 21, 2015 8:48:17 GMT -5
I don't think I'd ever bother to drop a H2 in this bike. The whole front end would need to be beefed up for sure. It's a really well balanced bike the way it is now. It would be fun to drop in Mouth's motor in and go looking for pink slips with a 400 badged bike tho! I have a H1D frame and suspension that would be better suited for a hopped up H2.
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