Author Topic: CB750 Wet Sump Conversion - Sumpthing (Read 74807 times)

simon#42 · « **Reply #275 on:** May 22, 2018, 10:20:08 AM »

thanks rob , is the classic racing scene in holland popular ? do they run their own meetings or work with modern classes ?
. and lastly ! are they mostly run on the traditional old road circuits ? thanks

voxonda · « **Reply #276 on:** May 22, 2018, 11:34:05 AM »

Quote from: simon#42 on May 22, 2018, 10:20:08 AM

thanks rob , is the classic racing scene in holland popular ? do they run their own meetings or work with modern classes ?
. and lastly ! are they mostly run on the traditional old road circuits ? thanks

IMO popular enough and for us the only way to compete without having to go abroad. Mostly their own meetings, some are mixed.
Sokme are on the old road circuits but mostly on industrial zones.

turboguzzi · « **Reply #277 on:** May 22, 2018, 12:54:42 PM »

3 hours is a nice shakedown so compliments to Rob and specially to Jan as he received initially a cold shower on this very thread

so well done!

voxonda · « **Reply #278 on:** May 22, 2018, 01:22:33 PM »

Thanks TG,

Most credits to BJ, and to both my sons for giving it a good trash!

gschuld · « **Reply #279 on:** May 22, 2018, 04:06:17 PM »

Yes, though it’s not definitive, that’s great news for Bert Jan and the Sumpthing wet sump conversion.👍

Nice job getting her all together Rob. It must feel good to have had a successful 3 hours of racing on a fresh build.

George

Tintop · « **Reply #280 on:** May 24, 2018, 08:13:54 AM »

Quote from: voxonda on May 22, 2018, 09:06:51 AM

Quote from: turboguzzi on May 22, 2018, 02:45:21 AM
compliments rob, specially for putting your money where your mouth is!
cant recall if you have a pressure gauge... no drops in strong acceleration/braking?
what's the "gas cap" in the tail for?

Due to time pressure not been able to fully concentrate on when or if it drops, but it is looking good. Gas cap on tail is is oil fill cap.

Can't see it dropping under acceleration, as the oil is being held against the pick-up; possibly under braking, but then the entire sump contents would have to migrate up into the engine, not good, but easily solved with a windage tray. A simple oil warning light would answer the question.

voxonda · « **Reply #281 on:** May 25, 2018, 01:43:28 AM »

Yes, no noticeable pressure drop. Investigating a little smoking under braking, which may indicate that oil migrate into engine with, maybe, some increase in crankcase pressure.

Tintop · « **Reply #282 on:** May 25, 2018, 03:22:42 PM »

Quote from: voxonda on May 25, 2018, 01:43:28 AM

Yes, no noticeable pressure drop. Investigating a little smoking under braking, which may indicate that oil migrate into engine with, maybe, some increase in crankcase pressure.

Good news on the pressure front, although didn't expect that to be an issue. There was white/blue smoke, but not a lot Rob; it could be seen in a couple of pictures, looked like it happened on the over-run, as the bike was leaned over in a corner. Have you done a leak down to eliminate anything mechanical?

turboguzzi · « **Reply #283 on:** May 27, 2018, 01:22:19 AM »

oil pressure or not, congrats to holland on first WSBK win ever!

Was really nice race... I think you know Michael van der Mark's father no? cool son he's got

voxonda · « **Reply #284 on:** May 27, 2018, 04:16:52 AM »

His father, Henk, won the 34 hour of Le mans in the eighties and is still one of the main contenders in the classic endurance series.

simon#42 · « **Reply #285 on:** May 27, 2018, 05:41:59 AM »

the second race win was more impressive , this time all the front runners went with the same tyre that michael used yesterday and he still won .
i am suprised it has taken this long for a dutch rider to win a superbike race , it does look like it wont be long until the next one though .

Bert Jan · « **Reply #286 on:** May 31, 2018, 03:48:53 PM »

Checking in on this. Rob, the extra parts are shipped tomorrow. Was at the BikeShed show in London with 2 bikes, didn't make it to post earlier. Awesome the SumpThing did what it was designed for. Although i did my best with the design, it was never intended for this kind of use. Awesome it's holding up under these circumstances

voxonda · « **Reply #287 on:** June 01, 2018, 01:29:48 AM »

No worries BJ, hope you had a great BikeShed show! Yes it did what it is suppossed to do without any issue's. We had some but not related to the sump. We did fine and finished both of my bikes. We made sure that the bike was used to its full potential to see if any problems would occure but not even one tiny drop of oil could be found! Tried two setups of oilcooler installs. For our purpose a cooler is needed. For solely street use a tiny one or even without one should be possible.

Bert Jan · « **Reply #288 on:** June 08, 2018, 01:06:02 PM »

Really happy to read that! Did the parts arrive btw?

voxonda · « **Reply #289 on:** June 10, 2018, 01:35:48 PM »

Hey BJ,

Yes, parts are in so can go to next level.....

Bert Jan · « **Reply #290 on:** June 17, 2018, 01:21:10 AM »

Hey all, i've made a deal with the CNC guy, the kits are shipped to here and i will have them in stock end of this month. Sooo no more 6 to 8 weeks waiting time

MRieck · « **Reply #291 on:** June 17, 2018, 08:49:36 AM »

Quote from: Tintop on May 24, 2018, 08:13:54 AM

Quote from: voxonda on May 22, 2018, 09:06:51 AM
Quote from: turboguzzi on May 22, 2018, 02:45:21 AM
compliments rob, specially for putting your money where your mouth is!
cant recall if you have a pressure gauge... no drops in strong acceleration/braking?
what's the "gas cap" in the tail for?

Due to time pressure not been able to fully concentrate on when or if it drops, but it is looking good. Gas cap on tail is is oil fill cap.

Can't see it dropping under acceleration, as the oil is being held against the pick-up; possibly under braking, but then the entire sump contents would have to migrate up into the engine, not good, but easily solved with a windage tray. A simple oil warning light would answer the question.

A lot of Yamaha's use the oil level warning light. On a slight incline highway onramp I can get the light to stay on through 3rd gear under hard acceleration. Used to scare the cr@p out of me so I installed a pressure gauge.

Bert Jan · « **Reply #292 on:** June 19, 2018, 02:59:29 PM »

we didn't have any problems regarding oil pressure in our tests. The stock pump delivers MORE than enough pressure under normal circumstances.

Tintop · « **Reply #293 on:** June 19, 2018, 06:06:41 PM »

Quote from: Bert Jan on June 19, 2018, 02:59:29 PM

we didn't have any problems regarding oil pressure in our tests. The stock pump delivers MORE than enough pressure under normal circumstances.

After Rob's little 'road test' Bert Jan I have no doubt that it is bullet proof on the street, and it would appear likely in a racing application. The light smoke in the photos I saw, was only banked over in a corner. Could easily be oil being sucked down the exhaust valve guides on the over-run on corner entrance.

spotty · « **Reply #294 on:** June 19, 2018, 07:24:23 PM »

[/quote] A lot of Yamaha's use the oil level warning light. On a slight incline highway onramp I can get the light to stay on through 3rd gear under hard acceleration. Used to scare the cr@p out of me so I installed a pressure gauge.

[/quote]

a certain yamaha which shall be called a bloody vmax from here on is well known for its propensity for accelerating at previously unknown rates ( at the time anyway ) which leads the oil to shift suddenly towards the back of the engine...yamaha in their wisdom ( or bent sense of humour ) saw fit to install the oil level sensor at the front of the motor......this causes the oil light to come on just when you'd rather it didn't

the oil pickup is at the back so theres no real problem but it sure does scare the crap out of you the first couple of times, after that you just learn to ignore it

Bert Jan · « **Reply #295 on:** June 21, 2018, 03:07:50 PM »

Quote from: Tintop on June 19, 2018, 06:06:41 PM

Quote from: Bert Jan on June 19, 2018, 02:59:29 PM
we didn't have any problems regarding oil pressure in our tests. The stock pump delivers MORE than enough pressure under normal circumstances.

After Rob's little 'road test' Bert Jan I have no doubt that it is bullet proof on the street, and it would appear likely in a racing application. The light smoke in the photos I saw, was only banked over in a corner. Could easily be oil being sucked down the exhaust valve guides on the over-run on corner entrance.

Thanks for your trust! We've sold a bunch now with no complaints, only praise so i'm really happy it's being picked up so well all around the world. I'm expecting the next batch this next week so I've got the kits in stock then wich will make shipping waaaay faster than the 6 to 8 weeks said on the website

Bert Jan · « **Reply #296 on:** July 27, 2018, 12:23:17 AM »

Hi guys, just a little update this time. All open orders were shipped last week, we have the kits in stock and they are ready to ship.
I guess this thread is going to get less traffic as the kit has proven itself and most questions have been answered here.

If you stumbled on here thru a search engine and/or for future reference, please email any questions to contact@sumpthing.net or outsidersmotorcycles@gmail.com.

It's been a hell of a ride so far so thank you all, in special all the members who bought the kit!

Cheers!

Scott · « **Reply #297 on:** August 05, 2018, 12:57:46 AM »

Duck off oil tank. I could never see the dart board before

Sam Green Racing · « **Reply #298 on:** August 05, 2018, 05:26:37 AM »

hahahahahaha.

Scott · « **Reply #299 on:** August 25, 2018, 10:16:16 PM »

I finally got around to finishing the Sump Thing conversion and would like to know what exhaust people are using.

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Author Topic: CB750 Wet Sump Conversion - Sumpthing (Read 74807 times)