Topic: Salt Racer CB 750 OZ style

[johno]

Hi Sam,
Sorry mate I havent ..... I went onto the DLRA web site today to find out,  but they have nt updated their web site yet, today was the last day and racing finished at 5pm , tomorrow the officials wil be pack up day . So hopefully soon.
I'm chafing at the bit to get the results of your class and mine .

The concept of the small class bike never crossed my mind before but there were so many bikes,  its very popular  You Got me thinking when you posted your speed  could I beat that    then I looked at my big fat guts and realised I need a 750
cheers Johno

[johno]

Great stuff johno and great photos too mate.
Who are the Pirie boys?
Might know 'em from the old stomping ground. 

Hi Mick you old smelter man !   The Port Pirie team have a web site, www.teamwaterbottle.com
This year ( unfortunately for me) he chose to run the unstreamlined classes, same bike but without fairing,

his horsepowers vary depending on his engine combo but are around 120HP, which is a problem for me at the moment as it will take a hiport head with a 500 lift cam to get close at best, I'm waiting for his times to get posted so I can start making some decisions, spend the dosh or change class
ciao johno

[Sam Green Racing]

Jonny, this was my mate Tiny's only run, holed a piston at 116mph in 5th gear.

DLRA Speedweek 2013 LASLO-CBR250R.holing a piston at 116 MPH in 5th gear

Sam.

[johno]

Thanks Sam,
 great pics, awesome       thought I was back there,  I noticed there were no flies on his visor, that must be the trick to avoid them just ride fast everywhere.

If he holed a piston he may need one of those fuel mixture gadgets that MR posted on another thread.
Hard to find places to test the bikes these days and supercharging is always a juggle to get timing and mixtures right.     Its a long way to the salt, nice if it can be sorted before going.

Noticed that most bikes ran a go pro type camera and a GPS to view their speed.   The video shows how rough it can get if you go off the graded track and had good sound.

I was just talking to an ambulance driver tonight and he said he heard of two accidents at the salt this week  that needed an ambulance so I hope they were just minor and the boys just hurt their pride.

Anyway Sam good luck to your mate, he done well and will have some good yarns when he gets home.
cheers Johno

[Sam Green Racing]

Finding places to test is a big problem Jonny. As far as I know, the motor was not taken down after the last tests (back half of last year) and the piston that blew might have been partially damaged back then.
Here is the one and only test that I know was made in August.

Test 2

http://forums.sohc4.net/index.php?topic=115527.0

Sam.

[sohc boy]

Like I said something for everyone , air cooled that makes it bike like and SOHC boy Peter used to have a Volksy drag bike !     Pete the most vehicles of one brand were Volkswagon , there were lots of them and speaking of rust preventive this rust bucket was the meanest Kombi in town,    for the forum guys SOHC boy is a pro paint and panel  man who specialises in restoring old Kombi's for a living ..... apart from painting bikes of course.

Pete this RETRO look is all the rage now.... how do they get the rusty look and leave the sign images do they acid spray or something, looks to even to be natural <?
cheers Johno

thats the boy's bus Johno ,where i contract in sydney , that bus was found (body wise ) as is , only had rust in bottom sections , no paint work , has angry SCAT motor ,feedback from salt , boys were claiming world record for vw powered bus ? puts some other cars to shame at the drags too 

[mick7504]

Great stuff johno and great photos too mate.
Who are the Pirie boys?
Might know 'em from the old stomping ground. 

Hi Mick you old smelter man !   The Port Pirie team have a web site, www.teamwaterbottle.com
This year ( unfortunately for me) he chose to run the unstreamlined classes, same bike but without fairing,

his horsepowers vary depending on his engine combo but are around 120HP, which is a problem for me at the moment as it will take a hiport head with a 500 lift cam to get close at best, I'm waiting for his times to get posted so I can start making some decisions, spend the dosh or change class
ciao johno

Hi johno
Mate how far can you go with a 750/4 motor before its considered not to be in that category?
Can you pack 'em full of cubes or is there a cut off point?
Reason I ask is that I'm sure that there's a stray 900 & an 1100 crank & rods packed away somewhere in the man cave. 

[johno]

Hi Mick,
Yeh that waterbottle from Pirie may have my measure, well see !    I,m kind of hoping he just cruised and runs less than 150mph to keep my dream alive.

The classes are very defined and by displacement, eg 500 cc   750cc    1,000cc
If you over bore or exceed that displacement you automatically put into the higher class, when claiming a record the motor has to have the head removed to check the bore stroke.  If I run 900 to 1,000 I,m heads up against the latest twin cams and four valves.   the bigger the cubes the bigger the gap between sohc 2 valve to twin cams and 4 valve

There used to be a 900 class but they have combined that into the 1,000 class,  guess who holds that record forever now and can never have it taken from him?    our forum  SOHC Boy  

Pete you arsy bugger!                           cheers johno

[Sam Green Racing]

I want my muhmy, 

  138.370mph  nice one Peter. 

Sam.

[sohc boy]

 HA HA ....you guys ......Johno ,i'm with Mick .allready thought bout this , 1000cc class, i have 1100 lightend crank RSC long rods ,68 mm bore ...ooop's maybe not 1002cc

[Sam Green Racing]

Wotcha waiting for then ?  come on Pete, DO IT. 

[sohc boy]

like i said have allready thought bout it .... on of two options ........i dont sleep much !

[scottly]

thats the boy's bus Johno ,where i contract in sydney , that bus was found (body wise ) as is , only had rust in bottom sections , no paint work , has angry SCAT motor ,feedback from salt , boys were claiming world record for vw powered bus ? puts some other cars to shame at the drags too

How quick, and how fast??

[Sam Green Racing]

758mph, standing quarter in 3.286 seconds at 364mph, had hell of a job stopping though Scott. 

Sam.

[scottly]

I guess I missed the bazillion pound thrust jet engine cleverly squeezed into the cargo bay, Sam.

[Sam Green Racing]

I guess I missed the bazillion pound thrust jet engine cleverly squeezed into the cargo bay, Sam.

With the not so stock engines carburetors sticking up either side of it. 

[scottly]

The twin valve covers don't quite look like anything that came from Wolfsburg, either.

[scottly]

The classes are very defined and by displacement, eg 500 cc   750cc    1,000cc
If you over bore or exceed that displacement you automatically put into the higher class, when claiming a record the motor has to have the head removed to check the bore stroke.

So if you were to de-stroke a 750 to 500cc, would it be legal in the 500cc class? Not sure how easy it would be, or where you would find 10mm longer rods, but it ought to breath fairly well with the 750 valves and bore. Run that combo through the computer simulator and see what it comes up with?

[johno]

Scottly,
just for a laugh I run the reduced stroke 750 specced engine, high comp, 125/75 cam, 33.5mm valves, webbers, etc          so  displacement is 500cc at 62mm bore and 42mm stroke.   the software wasnt happy and showed a massive dip in hp and tq from 3 to 5 grand, wasnt happy with a few other things either but hey,  what Scottly wants,  Scottly gets

Crank horsepower Result.......79HP   @ 9,250 RPM
                                            45ft/lb @ 9,250 RPM

                                            85HP   @ 10,000 RPM
                                            44ft/lb @ 10,000 RPM   

Motor is heavier though than the sohc honda 500 engine,  wonder what horsepower the 500cc boys on the forum get ?

CHEERS JOHNO

[johno]

like i said have allready thought bout it .... on of two options ........i dont sleep much !

Pete I like both options, the boldor look is cool and sleeper like...... the 1100 look is loud and racy, I wonder what that rear down thrust wing would be like at full noise ?  if it didnt shake it would certainly add some down thrust at the right time reducing some of that rear tyre slippage.

I reckon it would be fast with Bears or Micks engine in rather than the mock up, that would get your clacker valve going Pete!

[johno]

Hi guys, I was just looking at Sams mate Tiny blown honda thread , he and the DLRA have just posted the results,   

I,m not sure whats going on but the Pirie boys 750 water bottle entered in 3 classes (number 739) and I watched them warm up on the GPS track but they have no recorded runs ......... I wonder whats happening ?
 if thats the case the record still stands at 149mph, thats interesting, they had a sh#tload of spares in the van.  Maybe all the results arnt on yet, I'll check  their web site.
johno

[mick7504]

johno
I think its time to think about a fire breathing dragon to give this GT750 a bit of what's for.
How about a 900 crank under some 67.5mm Wisecos to keep it just under 1000cc.
I'll throw a Honda 4 motor in to get the show on the road.
It'll need a tear down & some magic done to it.
Something to think about mate.

[johno]

Did you find out what speed that 175 reached ?

Sam.

Hi Sam, I was looking at your mates Tiny thread and the results for your 175 class were 95mph on the Monday which was #$%*e day 45 degrees and 10 to 15mph head wind    and the wind changed on Tuesday and he ran 97 mph.       So Sam the man your 116mph is still out there for all to catch

[johno]

johno
I think its time to think about a fire breathing dragon to give this GT750 a bit of what's for.
How about a 900 crank under some 67.5mm Wisecos to keep it just under 1000cc.
I'll throw a Honda 4 motor in to get the show on the road.
It'll need a tear down & some magic done to it.
Something to think about mate.

Hi Mick,  I agree 100% that we Honda sohc 750 custodians need to keep the pressure on the suzi boys,
 40 years ago I had some great runs against the water bottles, it was always neck and neck both on the road and the speedway and nothing changes today, good stuff.

I feel like I let the Honda team down this year by not finishing in time for racing,   Peter was keen as and ready to ride , Bear was keen , I feel if I finished the bike it would have been a catalyst to get a few forum boys there for a great few days.      On a positive note I have learnt so much over the last 6 months especially the trip to the salt that it gives me the opportunity to be more prepared bike wise and more prepared to enjoy the experience overall by chilling out with the crowd.

Nothing would make me happier than be part of getting a few forum blokes together at the lake, we have so much in common I,m sure it would be a blast.

One things for sure Mick, the forum guys have so much experience , put together who knows what the results could be.        johno

[sohc boy]

thats the boy's bus Johno ,where i contract in sydney , that bus was found (body wise ) as is , only had rust in bottom sections , no paint work , has angry SCAT motor ,feedback from salt , boys were claiming world record for vw powered bus ? puts some other cars to shame at the drags too

How quick, and how fast??

   Scottly  kombi run a best of  14.1 (1/4 mle )......not sure about down salt think 120mph ..motor is based on 2.0 kombi . 2.7 Ltr SCAT heads