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Old 13-10-2016   #31
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Re: Sprint & Hillclimb spec Cinquecento

The engine mods will be....
Increase in capacity.
Big race cam.
Ported P75 head with bigger valves.
36mm bike carbs on a custom manifold.
Lightened and balanced rods,crank and flywheel.
Lots of internal mods to control the oil splash and mist.

This engine will be built to rev to over 9000rpm, my current one hits 8300rpm and still has the 55,000 mile completely standard road car bottom end it came out of the factory with.
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Old 13-02-2017   #32
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Re: Sprint & Hillclimb spec Cinquecento

It's been a while so here's an update.
The planned 36mm bike carbs have been changed to twin 40 Dellorto DHLA's with 36mm chokes, to fit these to the head I fabricated an inlet manifold
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Old 02-03-2017   #33
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Re: Sprint & Hillclimb spec Cinquecento

very cool little car, subscribed
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Old 04-03-2017   #34
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Re: Sprint & Hillclimb spec Cinquecento

Do you have any more videos of you racing? Looks awesome
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Old 19-04-2017   #35
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Re: Sprint & Hillclimb spec Cinquecento

Time for an update.
The planned new engine is taking longer than expected due to delays caused by one of the engineering suppliers but hopefully the engine will be completed,installed and dyno'd by the end of May.
The crankshaft,cam pulley,lightened flywheel and clutch cover are currently being balanced, we have had the pistons,con rods and crank assembled in the block to measure how much to machine off the top of the block to get the piston crown protruding the correct amount at TDC.
I'm trying to find a gearbox to fit Quaife diff into to increase grip with the expected power increase but aren't having much luck, I need a 5 speed Punto or Seicento that has a 4.06:1 diff ratio but must have a bolted fitting crownwheel......anyone got one??.
I managed to loose another 34kg of weight out of the car by "interpreting" the RAC MSA Blue Book regs to suit me, I've removed the inner wings in front of the strut mounts leaving the chassis legs and removed the front panel and replaced with a tubular support frame for the radiator and bumper. Ive also removed the rear hatch slam panel and gutted the hatch inner skin and replaced the window glass with perspex.
The biggest task was to make tubular rear trailing arms with adjustable mounts and turreted coilover rear shocks to replace the complete standard rear suspension setup,this was done to loose more weight and give multiway adjustability. I used current Panda rear hubs as the have 4 bolt fixing, I then bolted them to a jig frame long with the body mount and basically joined them together with 32mm seamless steel tubing and used M12 rose joints for the adjustable arm pivots.
I've competed in one Sprint so far this season and was beaten into third place by 0.04 of a second by a well sorted 1380 MG Midget, the class was won by a Imp engined Clan Crusader on super sticky Avon slicks. During this event the rear crank oil seal decided to start leaking so this has now been replaced, while the gearbox was out I checked to see what fitting the Cinq Sporting crownwheel was......yep it's pushed on.......dohh!!!.
The car is now nearly ready for it next outing on Sunday 23rd April at Rushmoor Arena, Aldershot, after this I don't have anything planned for May as hopefully the new engine will be completed and being fitted along with the Quaife diff if a suitable gearbox can be found.
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Old 19-04-2017   #36
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Re: Sprint & Hillclimb spec Cinquecento

Lightened inner wings and front panel, I've now made a stronger tubular support for the radiator and front bumper.

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Last edited by biggelmo; 19-04-2017 at 22:28.
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Old 19-04-2017   #37
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Re: Sprint & Hillclimb spec Cinquecento

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Old 19-04-2017   #38
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Re: Sprint & Hillclimb spec Cinquecento

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The jig frame that kept everything nice and square.
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Last edited by biggelmo; 19-04-2017 at 22:23.
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Old 19-04-2017   #39
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Re: Sprint & Hillclimb spec Cinquecento

[attach]179656
As you can see I didn't get the turret position right first time.
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Old 19-04-2017   #40
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Re: Sprint & Hillclimb spec Cinquecento

[attach]179657
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Old 19-04-2017   #41
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Re: Sprint & Hillclimb spec Cinquecento

This thing is gonna be immense!!
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Old 19-04-2017   #42
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Re: Sprint & Hillclimb spec Cinquecento

[attach]179658
Happiness is a tight mitre.
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Old 19-04-2017   #43
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Re: Sprint & Hillclimb spec Cinquecento

[attach]179659
M12 rose joint pivots
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Old 19-04-2017   #44
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Re: Sprint & Hillclimb spec Cinquecento

[attach]179660
Panda hub bolts to here.
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Old 22-04-2017   #45
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Re: Sprint & Hillclimb spec Cinquecento

i have a punto 75 gearbox i dont need but i dont know the ratio on it. how would i check if its got a bolted fitting crownwheel? i would hillclimb my cinq (got 3 of them) but wife wont let me. might settle for my corsa b (should be in a museum).
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