Author Topic: Bonneville Turbo CB500/550 (Read 84857 times)

Stev-o · « **Reply #150 on:** July 18, 2012, 08:24:14 PM »

My job gets in the way of real work on the bikes too.

Gurp · « **Reply #151 on:** August 20, 2012, 09:14:07 AM »

Any new progress on this bike. Havee to say this one of the more interesting bikes on the forum. So just wondering what was up wiith it.

Thx ron

Stev-o · « **Reply #152 on:** August 20, 2012, 03:32:22 PM »

Too busy with the mother lode?!

Greggo · « **Reply #153 on:** August 20, 2012, 04:27:30 PM »

Quote from: Stev-o on August 20, 2012, 03:32:22 PM

Too busy with the mother lode?!

Yup. Basically, we got this bike to run, and that was enough to know I could stash it away for a while without worrying if the motor ran, or if the turbo was seized, or if I had bought myself a shiny looking turd (I didn't

). So, in the pursuit of sanity for my dad's workplace, we rolled this bike out of the way, and into the storage shed until I can take some vacation time, or get fired

cabrala · « **Reply #154 on:** August 20, 2012, 07:07:51 PM »

"or get fired"

I like your style Gregg.

SOHC4 Cafe Racer Fan · « **Reply #155 on:** August 21, 2012, 11:42:14 AM »

I told Carpy about your build thread. He was excited to hear about it.

Greggo · « **Reply #156 on:** August 21, 2012, 11:45:06 AM »

Quote from: CB750 Cafe Racer Fan on August 21, 2012, 11:42:14 AM

I told Carpy about your build thread. He was excited to hear about it.

Oh, Cool! Did you tell him we got it to run? He told me he had never had it running when I spoke with him after the sale.

SOHC4 Cafe Racer Fan · « **Reply #157 on:** August 21, 2012, 11:52:09 AM »

Can't remember, since I mentioned it to him a couple of months ago. I told him to check out the thread.

Greggo · « **Reply #158 on:** October 08, 2012, 06:20:33 PM »

Gentlemen, let me ponder something out loud here...Could this bike have done 175.813 mph on the salt in 1979? If not, what other Honda in the 500cc class could have? Steve Alexander's Honda was in class APS-BF, for Special Construction Partial Streamlining - Supercharged Fuel. I cannot find a picture.

FrankenFrankenstuff · « **Reply #159 on:** October 08, 2012, 06:34:25 PM »

HIJACK!
I just wanted to see what 175mph looked like.

Worlds fastest RB30, RIPS 240z 7.89 @ 175mph

754 · « **Reply #160 on:** October 08, 2012, 07:20:28 PM »

In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

Greggo · « **Reply #161 on:** October 08, 2012, 07:26:37 PM »

Quote from: 754 on October 08, 2012, 07:20:28 PM

In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

Remember if that had any aerodynamic bodywork, or other mods? What did it run on?

DustyRags · « **Reply #162 on:** October 08, 2012, 09:31:42 PM »

OK, joining this thread- I wanna hear all about this.

Terry in Australia · « **Reply #163 on:** October 12, 2012, 05:27:33 AM »

Quote from: Greggo on October 08, 2012, 07:26:37 PM

Quote from: 754 on October 08, 2012, 07:20:28 PM
In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

What did it run on?

Salt?

Greggo · « **Reply #164 on:** October 12, 2012, 05:56:12 AM »

Quote from: Terry in Australia on October 12, 2012, 05:27:33 AM

Quote from: Greggo on October 08, 2012, 07:26:37 PM
Quote from: 754 on October 08, 2012, 07:20:28 PM
In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

What did it run on?

Salt?

A wise guy, eh? Nyuck nyuck nyuck. Mine runs on fairy farts.

Syscrush · « **Reply #165 on:** October 12, 2012, 06:24:56 AM »

Quote from: Greggo on October 12, 2012, 05:56:12 AM

A wise guy, eh? Nyuck nyuck nyuck. Mine runs on fairy farts.

Hey, you're on the SOHC4 forum too, right? I go by Syscrush over there.

Greggo · « **Reply #166 on:** October 12, 2012, 06:30:59 AM »

I scoured the earth, and found a Yoshimura racing magneto set up.

I'm more motivated to get it running smoothly again, as the shop may be running a 350 Benelli single, making a run for that Land Speed Record next year. Once this turbo is running how it should, we've got access to a dyno, and that should give the best indication of whether or not this bike could have been the record breaker.

Greggo · « **Reply #167 on:** October 12, 2012, 06:32:22 AM »

Quote from: Syscrush on October 12, 2012, 06:24:56 AM

Quote from: Greggo on October 12, 2012, 05:56:12 AM
A wise guy, eh? Nyuck nyuck nyuck. Mine runs on fairy farts.
Hey, you're on the SOHC4 forum too, right? I go by Syscrush over there.

Syscrush, this IS the SOHC4 forum

Syscrush · « **Reply #168 on:** October 12, 2012, 07:27:59 AM »

Quote from: Greggo on October 12, 2012, 06:32:22 AM

Syscrush, this IS the SOHC4 forum

WOW! I got confused.

I switched too fast from a thread about land speed records on another forum with similar color scheme to this one.

Plus I hadn't had my caffeine yet. Still, this was a high water mark of stupidity for me.

ivanhoew · « **Reply #169 on:** December 08, 2012, 10:06:16 AM »

h gregg ,

i built a 400/4 turbo in 1980 , also using an ihi turbo , any thing i can help with just ask .

regards
robert

Greggo · « **Reply #170 on:** December 08, 2012, 10:24:25 AM »

Hi Ivan,

I'd like to hear what size/type of carburetor you used. Sounds like a fun bike!

ivanhoew · « **Reply #171 on:** December 09, 2012, 12:53:21 AM »

here is the link to it gregg,

http://forums.sohc4.net/index.php?topic=72590.0

when i first built it , i used a 1.5 inch stromberg carb , a bit like an su carb ,but with a diaphragm . it worked ok on boost ,but the piston on it was so heavy it only lifted about 1/4 inch for 5k rpm ,so v hard to get a good mix off boost .

so i then went to a mikuni i think it was off a yamaha xs 650 twin .this worked well ,the only problem ws getting enough fuel through the float bowl and into the engine .in the end , i took a pipe off the drain plug ,and ran it to a tube mounted in the air flow when the piston lifted high enough . this then bled fuel in as the airflow sucked on it .and took it from 60 to 85 bhp .

regards
robert

Greggo · « **Reply #172 on:** December 14, 2012, 02:32:03 PM »

That is a cool one Robert! I have definitely heard letting them get thirsty is a recipe for detonation...

Got tired of ignoring this bike every time I go to the shop, so I pulled the throttle cable to get a replacement made. Baby steps now...

Sam Green Racing · « **Reply #173 on:** December 17, 2012, 04:07:10 PM »

Quote from: 754 on October 08, 2012, 07:20:28 PM

In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

down here, ours ran 207mph,

Greggo · « **Reply #174 on:** December 18, 2012, 06:29:32 AM »

Quote from: 754 on October 08, 2012, 07:20:28 PM

In the mid 70,s a sohc 750 turbo from up here ran 150 ish on the salt.

I wonder what kinda gearing that took...

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Author Topic: Bonneville Turbo CB500/550 (Read 84857 times)