Topic: DIY Egli Sohc 4

[turboguzzi]

going to try the similar AIM system in my next race in Adria. There is a shop in the track and they let you test the system for the weekend.

http://www.aim-sportline.com/index_eng.htm

Let's see what it does to my lap times

TG

[mec]

Let's see what it does to my lap times

TG

whats your experience?


update on the guzzi project:
our racebike-egli-like-guzzi is race ready. overall weight is 170kg dry, but with 8 litres of fuel. dyno runs showed 108hp, 116Nm. gear shifting problems as encountered on the dyno runs have been sorted out so far. there was a problem with the gear linkage.
i have to solve two oil leakage problems on the engine however, but that will be an easy fix.
further work, that will have to be done: add head lights and tail lights.

first rolll out will be held on wednesday.

when everything is fine, the bike will be raced at the 4hours of Spa.

mec

p.s.: after Spa I will start the restoration of my sohc egli replica. i asume, two or three weeks and it will be race ready again. hoping that i can use my left arm as usual again soon.

[betoaero]

Congrats, Mec! Very nice frame!
Best Egli replica frame seen on Internet.

I've read that most of the Egli with dry sump used the frame backbone as the oil reservoir. Some had a little extra tank below carbs to prevent oil starvation under heavy braking. Is this issue true?

Would you have the Egli frame measures sent by voxonda, mean, I can't read all the small numbers.

Cheers.

Al. (from Brazil)

[mec]

I've read that most of the Egli with dry sump used the frame backbone as the oil reservoir. Some had a little extra tank below carbs to prevent oil starvation under heavy braking. Is this issue true?

Would you have the Egli frame measures sent by voxonda, mean, I can't read all the small numbers.

Cheers.

Al. (from Brazil)

hi,

as mentioned in one of my previous posts, an oilreservoir in a horizontally position as used in the egli conzept, must lead to oil starvation problems. either under braking or under accelerating (use a oil pressure gauge and you will see). the extra tank will help against that problem. the more volume, the better. this leads to the knowledge that the stock design (of the oil feed) is the better one. make an oil tank (geometrical form of an upside down pyramide) similar to the stock one and you will be trouble free.

my egli replica frame (sohc honda) does not have much in common with the egli one. it only looks like an egli frame. i have build it "around" the engine, integrating some modern numbers (e.g. rake, wheel distance, trail) for better race performance.

mec

[Gonzowerke]

yes, the original was bronze welded(?). we say "hartgelötet".
later F.W. Egli TIG welded the frames due to economical reasons (as far as I am informed).

Here in America we call that "Brazed". It's like soldering, but with a brass rod and some flux.

[mec]

hello,

first rollout with the guzzi went fine (however we had to replace the engine with another one due to a broken crankshaft).
according to my racerfriends the bike behaves well, eventuelly there is work to do with dampening fine tuning of the front fork.

the last days i added lights anda  belly pan ( i call it "diaper pants").

race number is 135
we are in pit 31

see you at Spa.

mec

[turboguzzi]

looks good man!

what did she do on the dyno?

and compliments on your amazing productivity

very slim chances to making it to spa due to new work

so good luck!

TG

[mec]

hi,

the engine did 108,3hp at 7357rpm, 112,5Nm at 6636rpm.

have a nice time.

mec

[mec]

hello,

yesterday i had time and started to restore my egli-replica.
fairing mounts and mount for laptimer, oil pressure gauge, front light, seat mounts a.s.o. had been bent. but this was an easy fix.
left footrest was missing, dito the right side of the fairing.
footrest and shift lever was a work on the mill and lathe. it took me half a day.
i did repairs on seat and fairing with fiberglass. the missing part of the fairing was superseded by a former scrap of the seat (side cover).

[mec]

the fuel tank was destroyed too.
first i separated the upper and lower half with the help of a jigsaw. i removed all the putty and paint. with a hammer i brought the fuel tank in the right shape again.
at the end i welded the upper and lower half together.

the slides of my mikunis refused to move anymore. too much dirt and sand. after an hour of disasambling and reasambling, washing, cleaning, the slides move again as they did before.
but this means, that i will have to dissasamble the top end of the engine

at the moment the bike is ready for paint.

the next days i will see if there is any damage to the swingarm, cause in the moment the bike did its salto mortale, the rear wheel touched the left rear wheel damper heavily so that the expansion chamber of the damper  rotated to the outside. to bring it in its former usual position the force of a big hammer was necessary.

mec

[rickmoore24]

Glad to see you healing and the bike is coming back together nicley.

[mec]

hello,

bike is as new again.
luckily there was no damage to the cylinder walls nor valves or pistons. the inspection of the engine top end took me half a day.

in the meantime i prepared the guzzi for our next event, the 4,5 hours classixs endurance in oschersleben (15th and 16th of july).
the guzzi bike now is powered by a new engine delivering 118hp at 7500rpm, 120Nm at 6700rpm. wow, the bike´s engine is stronger than my 1100er sohc 

for the first time we will use a fuel quick fill system from newton equipment (http://www.newton-equipment.com/quickfill.html). the complete filling of the fuel tank (25 litres) takes 4 seconds. curious how great the fuel leakes will be under racing conditions, if any. at the shop we lost 125ccm fuel, i believe we will have to do some practice sessions to learn handle the quick fill system.

mec

[Ecosse]

don't know why i ceased getting notices for this thread.

but more importantly i'm relieved your shunt wasn't worse and that you're on the mend.

nice to see "my" object of desire has been restored. the guzzi egli doesn't disappoint either!


best wishes mec.

[turboguzzi]

hei mec, the goose looks good and 118 is about what Jacques Ifrah is getting form his Motobel racer

how many cc's is the guzzi?

so we are both racing this weekend, I am down in adria, hope the temperatures dont go crazy, 36 degrees expected already!

good luck!

TG

[mec]

thanks for your best wishes, ecosse.

@TG:
the engine has 1140ccm.
good luck for your racing weekend.

cause of my unability of driving safely a bike, i decided to climb in my racing career and am now the team manager of my racing team. two fellow racers will race the bike when i am drinking coffee and am looking if everything goes fine

mec

[turboguzzi]

hei mec, how did the race go?

TG

[mec]

hi TG,

we are very happy with our overall performance, however the result was not the best.

thursday evening one of our helpers broke the left fork where the front axle is fixed with a M10 screw by overtightening this screw. we thought, this was the end of our adventure and decided to return home the next morning.
but 1km from the racetrack there was "Schubert motorsport" (http://www.schubert-motorsport.de/), very famous for building winning race cars. they gave us the possibilty to tig weld the crack, what i did friday morning. reassembling the left fork leg was easy. the repair seemed to be reliable enough.

the practice runs we finished in 9th position, although both drivers never had been on this track. it was obvious that the bike handled very well and that it was like a rocket on the straight. all 4 cylinders didn´t had any chance unless they had the full yoshimura package.

from the beginning to the 4th hour we raced at 3rd place. most astonishing in second place a Laverda (two bike) team. i was sure that no laverda will finish the race (cause laverdas always blow the engine before the finish line). but i was wrong. the laverda team finished in second (but with two bikes what can´t be compared to a one bike team).
30 minutes before the end the rear wheel drive (we say "Kardan") broke what caused a 26minutes delay finishing overall 16th. we changed the "kardan" and finished the race.

BUT: what makes me happy, we did the second best lap time of the event. this prooves that the bike performs more than well. it was a surprise even to us, the bike is a real rocket.
winner was a Rau Kawasaki. this bike was at second place in Spa 2010, crashing, again second place at the end of the race and running out of fuel is the last lap. but this time nobody came near to the performance of ACR Endurance Kawasaki - congrats!

mec

[turboguzzi]

nice! but that's what happens when you try to pass 114hp through a cardan designed for 70hp

fit a new one every race! i know that some people here do that....

TG

[mec]

nice! but that's what happens when you try to pass 114hp through a cardan designed for 70hp
fit a new one every race! i know that some people here do that...
TG

within the cardan there are 8x M8 screws connecting the big gear wheel to the adapter which fits to the rear wheel.
it seems to be a fact that one of these screws came loose, then another a.s.o......7 of these screws are broken.
i am hoping that we will find a better way to assemble the cardan, e.g. the proper amount of loctite, the right loctite (there are many sorts of red loctite available).
i know, when this problem is solved, another one will appear.

mec

[turboguzzi]

OK, I know what part you mean, I got a Le Mans III....with bad splines in that plate....  I thought it was the double U-joint that broke.

TG

[mec]

hello,

these days the guzzi is at the shop of our engine guru. he will inspect the conrod big end bearings. this can be done by removing the oil pan and removing the connecting rod cap. looking at the inside of the piston will give some infos, if the engine is running at reasonable temperatures.
pic 1 - the completely destroyed cardan

meanwhile i changed the design of the gear lever of my egli. hoping that in case of an accident, the two piece gear lever will brake both aluminium screws and the part sitting on the multi teeth gear spindle will stay ok. it is easier to fabricate the simple part that does not have the "not so easy to do" multi teeth junction. the slot as seen on the last picture, is for fine adjusting the lever.

mec

[scroggins5000]

This is the best thread ever. Love the bike, and all the tools.

[turboguzzi]

hi mec

i dont know how well your racing Egli shifts but i definitely had bad experiences with "reverse" levers mounted directly on the shaft like yours.

the arc of the movement is opposed to the arc of the foot movement, so it "digs into your boot and creates friction! I recently changed the lever in my VFR750 from shaft mounted to one that pivots on the footpeg and the improvement in shifting quality and smoothnes has been amazing.

you can also play with the "ratio" between the lever and the arm in this way. I strongly recommend it, it made a big difference in quite a few bikes. this is the situation in my racer....

[mec]

hi TG,

thanks for your input. sure your argumentation is correct. but i am riding my racebikes that way (reversed shifting with "incorrect arc movement") for many years now without complaints. the old cb750 transmission can not be compared to new transmissions however, especially 4th gear is a trouble shooter, but concentrating during shifting helps, ditto slower (millisecond range shifting as well.

the next point is, that i am a "light weight maniac". as mentioned in another post, i prefere 10kg less over 10 hp more.


@ all:

some weeks ago we raced at the "slovakiaring". unfortunately we had two days at a "shortened track", ~3.5km. a complete lap is 7km long. there are 5 or more possibilities to change the track layout, i dont know why, but we had to be content with a short one. either way, we had fun, the track makes joy to ride.
i did one session, recognizing that my shoulder hurts a little bit and there is some lack of power in it. all other sessions a friend of mine, robert, rode the bike.
klaus, rider of our "eau rouge guzzi" was happy finishing fourth in the race held on sunday. both bikes had our Stealth GPS laptimer onboard. this is a little device that makes joy to play with.

what makes me not so happy, was the fact that our guzzi reached 221km/h topspeed, compaired to 211km/h to my sohc. my honda was geared way too long, 17:42, however. fifth gear was fine at the end of the start/finish line. but i am skeptical, if a proper gearing would have helped to beat the guzzi. maybe i will do another dynorun, and look if there is something wrong with the engine. 27/28/29 sept we will compete at the GTF event in Rijeka, on thursday travelling to Imola and start at the 200 Miglia di Imola Revival (http://de.200miglia.com/). we hope that the bikes will be in one piece after rijeka. our guzzi will be raced not only in the short runs, but also in a 2 hours race in rijeka.

some words to our laptimer graphs from slovakiaring (all data can be saved via blue tooth to your laptop):
the picture titled "robert" is my sohc, "klaus" stands for guzzi.
the yellow graph is measured Speed in km/h, x-axis track length in meters.
the violet graph is longitudinal G-loads. you can see braking, accelerating and even shifting.
in the left window we can see all laptimes during this session and below, the track in red (accelerating) and blue (braking). you can put your mouse wherever you want at the track graph and the programm shows the speed at this position of the track. there are much more features (i am unable to understand one or the other) like lateral G-loads, lap by lap comparison a.s.o...
comparing the graphs (guzzi and sohc) at the end of the finish line, fastest point, you can see that the guzzi graph is steeper, more upright. this is a hint that the guzzi is more powerfull, has better acceleration and topspeed. this is a no go, therefore one more dynorun.


mec

[turboguzzi]

hei mec

will 95% be in imola, so looking fwd.

Cheers

TG