Author Topic: CB750A Street ET bracket drag bike. A year to build it. (Read 628763 times)

Bill/BentON Racing · « **Reply #1250 on:** May 13, 2011, 05:27:55 AM »

Voodooracer,I feel your pain.....I mean positive vibes!!!

Dyno tomorrow!
Rockingham next weekend!!!!!!

Boost gauge.....what boost gauge? I know nuttin,nuttin @ all!!! ;)Bill

Sam Green Racing · « **Reply #1251 on:** May 13, 2011, 05:32:37 AM »

It looks like the cockpit of a Jumbo Jet.

Sam.

Doctor_D · « **Reply #1252 on:** May 13, 2011, 06:42:12 AM »

Quote from: jaguar on May 12, 2011, 07:00:20 PM

are you running a master on the left and right?
why?

IIRC, its for the rear disk brake -- for "staging."

jaguar · « **Reply #1253 on:** May 13, 2011, 07:23:18 AM »

That makes sence but wanted to know.
We need alot more dyno sheets and videos...

Sam Green Racing · « **Reply #1254 on:** May 13, 2011, 08:49:28 AM »

Send us lots of money Jag and we'll go at it full time, I'll even pack in my job and get the next plane over.

Sam.

jaguar · « **Reply #1255 on:** May 13, 2011, 02:59:15 PM »

LOL sure thing....

Hell im off for the summer and looking for something to do....

Bill/BentON Racing · « **Reply #1256 on:** May 14, 2011, 01:59:09 PM »

Back home,real dyno says ROCKINGHAM here we come! Samauto..giant killer lives again.Dyna 2000 did malfunction.Larry @ Dyna,great customer service,checking it out.
First run like it came off track after running 12.948 and 12.997 @ 116.14 mph was 74.10 back in March.First run today almost 76 RWHP.Changed mains,77.39 RWHP.tried Maxima 0-30wt synthetic......79.56 RWHP!! Stall closer to 27-2800rpm.But you can load it,it'll idle @ 1000 all day,carbs much better,actually good,release the brake and off you go no missing,hesitation,stall...all gone!!
With 2 teeth more in rear it ran 126mph showing 79.56 RWHP!

60 ft times going to be interesting,more tire pressure,more sprocket,more HP,I know not down low,don't care if it's consistent!

We're going RACING!!

,Bill

133 RWHP....Boost gauge worked!!!

A curve we can live with,A/F also! Finally the puppy behaves!

Bill

Jim F · « **Reply #1257 on:** May 14, 2011, 05:44:56 PM »

Good job bill. glad everything is back to normal. Glad the
Carbs are finally working good and the ignition too. Atleast
we know the Dyna 2000 was going off on the Top end.
I will call you when I get back home tomorrow
We need to start getting a list together etc etc etc etc

Jim

scottly · « **Reply #1258 on:** May 14, 2011, 06:16:24 PM »

That's a very nice looking, linear HP curve; do you have a dyno chart of torque vs RPM?
Good luck at the Rock!!!

scottly · « **Reply #1259 on:** May 14, 2011, 06:42:56 PM »

At what RPM???

scottly · « **Reply #1260 on:** May 14, 2011, 07:41:40 PM »

Quote from: MRieck on May 14, 2011, 07:25:18 PM

Quote from: scottly on May 14, 2011, 06:42:56 PM
At what RPM???
14,000

Wow, a torque peak at 14K!! That must really work well with a stall speed of 2800 RPM..

scottly · « **Reply #1261 on:** May 14, 2011, 07:49:27 PM »

LOL!!! Honestly, I would like to see a torque curve, plotted against RPM...

Bill/BentON Racing · « **Reply #1262 on:** May 14, 2011, 09:14:47 PM »

Yeh,OK,I'll get one Monday.....Software said 8.7 @ 92 in 1/8th and 13 flat @ 112mph....it doesn't know the size of Samauto's heart,I mean ports! BBD(Bill's Butt Dyno) says 8.4 @ 94mph and 12.6 @ 118mph!

Hey 133 hp,14,000 rpm,cannutter valves ,muffler bearings and catastrophic converters
and boost gauge....well what can you say? Team Sam Green #1!!!
Frank,I'm ready to let the big dog eat.The puppy has been walked almost to death!

Let's go have some FUN!!!

,Bill

scottly · « **Reply #1263 on:** May 14, 2011, 09:25:10 PM »

Looking forward to seeing the "real world" results from the drag-strip, as I'm sure Sam is!!! Good luck guys!

voodooracer · « **Reply #1264 on:** May 15, 2011, 02:38:11 AM »

That's gotta feel good, fellas, after so much hard work. Best of luck at the track!

Sam Green Racing · « **Reply #1265 on:** May 15, 2011, 04:22:46 AM »

Quote from: MRieck on May 14, 2011, 05:11:00 PM

Quote from: bellcow54 on May 14, 2011, 01:59:09 PM
Back home,real dyno says ROCKINGHAM here we come! Samauto..giant killer lives again.Dyna 2000 did malfunction.Larry @ Dyna,great customer service,checking it out.
First run like it came off track after running 12.948 and 12.997 @ 116.14 mph was 74.10 back in March.First run today almost 76 RWHP.Changed mains,77.39 RWHP.tried Maxima 0-30wt synthetic......79.56 RWHP!! Stall closer to 27-2800rpm.But you can load it,it'll idle @ 1000 all day,carbs much better,actually good,release the brake and off you go no missing,hesitation,stall...all gone!!
With 2 teeth more in rear it ran 126mph showing 79.56 RWHP!
60 ft times going to be interesting,more tire pressure,more sprocket,more HP,I know not down low,don't care if it's consistent! We're going RACING!! ,Bill

133 RWHP....Boost gauge worked!!!

A curve we can live with,A/F also! Finally the puppy behaves! Bill
Nice work Bill. A good feeling Sam?

Well done team, niggles over

Yes Murphy, you got it spot on.

Sam.

Sam Green Racing · « **Reply #1266 on:** May 15, 2011, 04:42:42 AM »

Quote from: big-jim on May 14, 2011, 05:44:56 PM

Good job bill. glad everything is back to normal. Glad the
Carbs are finally working good and the ignition too. At least
we know the Dyna 2000 was going off on the Top end.
I will call you when I get back home tomorrow
We need to start getting a list together etc etc etc etc

Jim

Jimmy, thanks for all the hard work on the carbs, you're back in business and can now get some miles on the motor.
I bet Mr Weeks is pleased that they are sorted as well, good carb choice Jon.
The big stumbling block now is the lack of torque at low revs where it's needed to spin up the converter on the brake. This is more than likely down to the choice of camshaft which was down to me. Without a clutch to allow the revs to come up quickly, I don't think there is any way we will achieve this without changing out the cam.
I spoke to Jon and he assured me the cam can be changed without removing the motor.
Are you up for it after the Rock if I can get a 125-60 cam Billy.
The 60/65 cam has much more grunt low down and the one fitted to the CR in my avatar produced 62ft lb of torque, even Murphy was supprised at the figures.
Well done every one and a big thanks to Brian and his Dyno for putting up with you.

Sam

Sam Green Racing · « **Reply #1267 on:** May 15, 2011, 04:46:45 AM »

Quote from: MRieck on May 14, 2011, 08:59:48 PM

Hey man...it's making 133.59 HP. You don't need no stinking torque curve.

Yes Mike, we don't need a curve, just some TORQUE, you got a 60/65 cam hanging around ?

Sam.

Sam Green Racing · « **Reply #1268 on:** May 15, 2011, 06:23:47 AM »

Thanks for that Mike and yes, we'll wait to see what happens.

Sam.

Bill/BentON Racing · « **Reply #1269 on:** May 15, 2011, 06:56:00 AM »

+1 on Mikes post.Stock CB750A 3000 rpm 12.1 rwhp,where we at now.Stock 3500-14.1,Samauto 19!,Stocker 4000-18.2,Samauto-25!! Give me more compression if anything.3000 rpm launch not exciting,but we're no longer hesitating!!

Bill
We know more this weekend!

Jim F · « **Reply #1270 on:** May 15, 2011, 03:59:29 PM »

ahhh but does reliability go with fast and quick?

Lets leave it alone and change the rear gearing if needed

but other than that LETS GO RACING

bwaller · « **Reply #1271 on:** May 15, 2011, 04:01:35 PM »

Good work Bill, it's been a struggle finding all the juice though huh? Man I can't believe you picked up an extra two with synthetic oil.

Tintop · « **Reply #1272 on:** May 15, 2011, 05:08:44 PM »

Quote from: bwaller on May 15, 2011, 04:01:35 PM

Good work Bill, it's been a struggle finding all the juice though huh? Man I can't believe you picked up an extra two with synthetic oil.

That's an old FF trick. 5W for qualifying, 30W for racing.

scottly · « **Reply #1273 on:** May 15, 2011, 07:02:46 PM »

Quote from: MRieck on May 15, 2011, 06:53:11 PM

Leave the #$%* alone and race it.

1+

Bill/BentON Racing · « **Reply #1274 on:** May 15, 2011, 07:45:05 PM »

That's what we're going to do!! Stay tuned!!!

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Author Topic: CB750A Street ET bracket drag bike. A year to build it. (Read 628763 times)