Johns cerbera rebuild and upgrade

[Incognegro]

Truly fantastic work! The diffuser being held on the 1st page... Is it now on the car? Can you tell me more about it (material/position and how it's gonna fix). I'd be more than interested in one. Rear end downforce I've always felt was missing from the Cerb, especially in long sweeping hi speed bends

Thanks mate.

[Engineer1949]

splitter isnt fitted yet i havent started on the body other than cutting all the inside mouldings out, it will have just a basically cerb shaped skin with much wider wings wider sills and aero.
but another good day at the emerald mill, exhausts all on temporary stands made to support them and all the sensors are now fitted with one exception of the oil temp drill out a sump plug to take the sender tomorrow, but it now has wide beam lambda, exhaust gas temp, water temp both in and out,and oil pressure all have had to have adaptors made to get them to fit ,fuel is connected and the engine breathers sorted so tomorrow sees the wiring for the injectors throttle etc ready for a start monday, exiting times.


john

DSCN2066 by Brundall Motorsport, on Flickr

DSCN2067 by Brundall Motorsport, on Flickr

[NickOrangeCars]

You can see a video of the very first run of the LS engine on the Dyno.

http://tvrengineer.co.uk/2016/02/08/first-run-of-l...

[Engineer1949]

been a couple of days since the last report here are some pics of the outputs from the dyno remember this is work in progress so more to come i.e. ignition only around 18 deg advance on the new engine hence the nice hot exhaust but all good fun, there is a small video on my facebook page tvr engineer of the very first turn of the key more in days to come.


john

DSCN2076 by Brundall Motorsport, on Flickr

DSCN2081 by Brundall Motorsport, on Flickr

DSCN2084 by Brundall Motorsport, on Flickr

DSCN2085 by Brundall Motorsport, on Flickr

DSCN2086 by Brundall Motorsport, on Flickr

[Engineer1949]

just a couple of comparison charts from the dyno room first one shows bhp and torque before any serious mapping second one shows bhp and torque differences between open straight through pipes and with the valve closed to give reasonable silencing.just as an aside i did see 503 bhp during the stepped power run these are all averaged out for the particular step, we where doing 500 rpm increases at three seconds intervals the wavy torque curve is the absorber settling down after a rev change.

john

DSCN2088 by Brundall Motorsport, on Flickr

DSCN2089 by Brundall Motorsport, on Flickr

DSCN2089 by Brundall Motorsport, on Flickr

Edited by Engineer1949 on Wednesday 10th February 19:30

Edited by Engineer1949 on Wednesday 10th February 19:33

Edited by Engineer1949 on Wednesday 10th February 19:35

[neal1980]

Are you going to stop at 500bhp or are you shooting for more??

[NickOrangeCars]

neal1980 said:

Are you going to stop at 500bhp or are you shooting for more??

500bhp was the goal - and super happy with the results of how the torque curve backs off - and bhp grows, really wanted to aim to make sure we tuned it so we didn't get silly amounts of torque and make it hard to drive.

But overall this is a racecar - and speed comes from the downforce and the massive handling upgrades.

[donski]

Amazing Engineering Hats Off to you!!!

Don

[Incognegro]

I just can't wait to see the body and the aero mods... rear diffuser in particular!

Great work all round so far mate.

[Engineer1949]

stripped the engine off the dyno today after doing the battery compensation stuff yesterday all very good results so get the chassis finished then body fitting and internals lots to think on


john

[Engineer1949]

just a quick update not got a lot done to the car other than the emerald mapping engine now back with me but pedal box has arrived with throttle pot and cylinders more fun stuff.


john

DSCN2123 by Brundall Motorsport, on Flickr

[Engineer1949]

not done a great deal lately but have made both a centering tool and a boring bar for the mill to finally machine the housings for the bottom swivel bearings on the lower a arms for the suspension on the cerb just got to do it now.


john

DSCN2129 by Brundall Motorsport, on Flickr

DSCN2130 by Brundall Motorsport, on Flickr

DSCN2131 by Brundall Motorsport, on Flickr

[Engineer1949]

not made a contribution lately but got a couple of days before the bits arrive for the work on nicks chim so been machining the sockets for the swivel bearings on the a arms, they tend to warp slightly when welding plus made a start on machining the split clamps for the steering rack hopefully finish tomorrow although got to make a boring bar for the mill first.

john

IMG_0039 by Brundall Motorsport, on Flickr

IMG_0038 by Brundall Motorsport, on Flickr

IMG_0037 by Brundall Motorsport, on Flickr

IMG_0040 by Brundall Motorsport, on Flickr

IMG_0041 by Brundall Motorsport, on Flickr

[Engineer1949]

lots more machining yesterday and today finished the rack clamps and started on the rear arb bearing mountings seems never ending on a manual mill but great to see them evolve.


john

DSCN2141 by Brundall Motorsport, on Flickr

DSCN2142 by Brundall Motorsport, on Flickr[url=https://flic.kr/p/G9rJfr]

[/url] DSCN2143 by Brundall Motorsport, on Flickr

IMG_0042 by Brundall Motorsport, on Flickr

IMG_0043 by Brundall Motorsport, on Flickr

Edited by Engineer1949 on Thursday 12th May 06:33

[Matthew Poxon]

Engineer1949 said:

just a quick update not got a lot done to the car other than the emerald mapping engine now back with me but pedal box has arrived with throttle pot and cylinders more fun stuff.


john

DSCN2123 by Brundall Motorsport, on Flickr

That looks epic!

[Byker28i]

Loving the engineering porn.

[mk1fan]

You need a break John. How about joining us on the 14th of June at Snetterton? I'll try not to distract you on the sighting laps this time

Edited by mk1fan on Thursday 12th May 15:27

[mk1fan]

Go on, get Nick to treat you - http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Engineer1949]

sounds like a plan


john

[Engineer1949]

well i am back again after becoming a civil engineer and at last finishing my wedge back on the cerb started by starting the machining for the rear arb bearings but should be lots coming in the next few weeks.


john