The building of my vintage racer

[supershaft]

Originally Posted by chasbmw

My point is that lap times often trump dyno runs. The dyno day's champion is most often NOT the fastest bike on the street or the track. Even at the drag strip!

lap times??? but different cams will suit different tracks................which I think was the point that the OP made.

I agree that you can look at a dyno chart in a stupid way, just seeking to maximise BHP or you can end up with an engine that has the best trade off between power/torque and revs giving you an engine that has good midrange as well as an improvement in power.

Still want to see those 336 dyno charts....[/QUOTE]

Different cams for different tracks? Great idea but virtually no one does that. That's what gearing is for.

I wish I had a dyno. A real good friend of mine has had one for years. Plus I have worked at places with them besides helping my dad tune dirt bikes on one when I was a kid. VERY useful tool. Low end power? With a wheel dyno? Your butt dyno is the only option. Midrange? How you run the dyno makes ALL the difference. I know a lot of tuners that are going to weigh a good butt dyno's opinion very seriously over their dyno charts when it comes to setting up midrange. Jetting? Dyno's are great for jetting top end and upper midrange and a great pointer to the right direction in the midrange but dyno charts are not the end all. I would love to see some dyno charts too but I don't think they are anywhere close to the end all in setting up a good running bike. If only they were!

[Voltaire]

Ho do the classes work in the US, here my R90 is open post classic- post 1963 over 500cc ( non Japanese), could run it with the Post Classic series but then you are on the track with pre 72- pre 89 with Japanese.

I could throw endless money at a BMW and still not make the top 5 ( I'm just not that good a rider) ....for me its just building the bike, 'being out there doing it" and having some fun. I get a real buzz passing Triumphs and (a) Nortons on the outside on an old mans touring bike.

[FreeTheBeast]

Here in New Hampshire, USA, it's a fairly small outfit called USCRA. United States Classic Racing Assn. There are several classes in which to race. I run this bike in Open GP, Euro Cup, and Heavyweight Super Vintage. I'm not yet old enough to compete in Masters (50+ year old rider). There is a rule book if you really want to have a look for comparison to your racing classification.

I'm just out there for the fun of it. My bike will not be able to compete with some of the fast Ducatis or Laverdas, but it is fun to be on track. I hope to be competitive in Open GP and Euro Cup this year. I'll do what I can within my budget. I try to remember that it's only a hobby. There is no prize money or fame for any of it. Hell, not even umbrella girls!

[Deadly99]

No umbrella girls ?

[Voltaire]

I got a framed certificate
The races in this series were at 4 tracks in the North Island, being the noob I was ( am) went to all the races and only had one DNF....end result is most points..... last thing I won was a meat raffle at the pub once....
If I had a bucket list I could tick it off now.......but alas the bug had bitten and building another

[bmweuro]

We were playing around tonight with my rear set foot pegs and managed to take 2 pounds off of them. Since you have my rear sets I would like to send you these lighter pegs to try out for freeeee. PM your address.

[FreeTheBeast]

Yeah! Thanks, Chris. Email sent.

Originally Posted by bmweuro

We were playing around tonight with my rear set foot pegs and managed to take 2 pounds off of them. Since you have my rear sets I would like to send you these lighter pegs to try out for freeeee. PM your address.

[280racer]

FTB's teammate here. Figured I'd join the fun and post a shot of my racer. As Andrew has said, it's all about the fun, and there is a lot of it. Trying to win is in there somewhere though! The lessons learned last year were many, some were painful, some were expensive, at least one was both, and my bike is still in hundreds of pieces as I rebuild it for the season. May 13th is the first event of the USCRA season at NHMS. Hopefully the bike will be ready by then. Can hardly wait!

Anybody who has ever dreamed of racing should at least come to the track to check it out. Great people, lot's of fun, and as long as you don't follow my (bad) example you can actually race for pretty short money.



Linky: http://280racer.smugmug.com/Motorcyc...8369&k=MvFbvD7

[Airhead Wrangler]

Originally Posted by bmweuro

I would like to send you these ... to try out for freeeee.

I need more people to say stuff like that to ME.

[hardwaregrrl]

Originally Posted by 280racer

FTB's teammate here. Figured I'd join the fun and post a shot of my racer. As Andrew has said, it's all about the fun, and there is a lot of it. Trying to win is in there somewhere though! The lessons learned last year were many, some were painful, some were expensive, at least one was both, and my bike is still in hundreds of pieces as I rebuild it for the season. May 13th is the first event of the USCRA season at NHMS. Hopefully the bike will be ready by then. Can hardly wait!

Anybody who has ever dreamed of racing should at least come to the track to check it out. Great people, lot's of fun, and as long as you don't follow my (bad) example you can actually race for pretty short money.



Linky: http://280racer.smugmug.com/Motorcyc...8369&k=MvFbvD7

Nice!!!!!

[FreeTheBeast]

[JonnyCash]

Originally Posted by hardwaregrrl

Nice!!!!!

Love that bike! That looks like a Guzzi front brake, am I right?

[280racer]

Grimeca 4LS (four leading shoe) brake. Very common period-correct racing brake. It's a bit heavy from what I hear but it sure works!

Originally Posted by JonnyCash

Love that bike! That looks like a Guzzi front brake, am I right?

[Voltaire]

Nice, one of my racer mates had his R90 on the Dyno, got about 55 BHP, told me that removing the birdmesh screens smoothed the motor out a bit, I took mine out a while back as I suspected as much.
Do you find Mondayitis lingers on for most of week following a race meet?

[supershaft]

Originally Posted by FreeTheBeast

Are you guys running Roadriders up front?? Are they making them in race compound this season?