Author Topic: CB750 Wet Sump Conversion - Sumpthing (Read 73491 times)

voxonda · « **Reply #275 on:** May 21, 2018, 03:07:51 PM »

Last from the pit....

calj737 · « **Reply #276 on:** May 21, 2018, 03:52:18 PM »

Bike looks great! What are your initial reactions to the Sumpthing?

voxonda · « **Reply #277 on:** May 21, 2018, 11:49:08 PM »

IT DOES WORK. No flaws found, and mechanical well made.

turboguzzi · « **Reply #278 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?

kmb69 · « **Reply #279 on:** May 22, 2018, 05:45:18 AM »

Rob, Are you using An-8 or An-10 on your oil lines?

simon#42 · « **Reply #280 on:** May 22, 2018, 06:56:49 AM »

what race was this rob?

voxonda · « **Reply #281 on:** May 22, 2018, 09:03:28 AM »

Quote from: kmb69 on May 22, 2018, 05:45:18 AM

Rob, Are you using An-8 or An-10 on your oil lines?

Use the An-8, but have used the 10 top. Both work fine.

voxonda · « **Reply #282 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.

voxonda · « **Reply #283 on:** May 22, 2018, 09:07:29 AM »

Quote from: simon#42 on May 22, 2018, 06:56:49 AM

what race was this rob?

A 3 hour demo in the south of Holland.

simon#42 · « **Reply #284 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 #285 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 #286 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 #287 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 #288 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 #289 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 #290 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 #291 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 #292 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 #293 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 #294 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 #295 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 #296 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 #297 on:** June 08, 2018, 01:06:02 PM »

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

voxonda · « **Reply #298 on:** June 10, 2018, 01:35:48 PM »

Hey BJ,

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

Bert Jan · « **Reply #299 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

News:

Author Topic: CB750 Wet Sump Conversion - Sumpthing (Read 73491 times)