This thing is gonna be immense!!

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).

You can check the diff ratio by removing the rear diff housing and seeing what's stamped on the side of the crownwheel or counting the crownwheel teeth and the pinion teeth.
If it's a P75 box it should have a 56 tooth crownwheel and 15 tooth pinion giving a nice relaxed 3.73:1 diff ratio.

thanks, il maybe check tomorrow if i get time.
i did fit it to my cinq as i thought the final gear was longer so would be better suited for motorways but it made hardly any difference unfortunately.

I did pop along bro Rushmore atbthe weekend, i presume you didn't make it?

I found my old supersport exhaust manifold if your interested..... Fits a 1242 or 1108

cartlegde_uk are you selling your branch manifold?id be interested.how much?

she looked good a brooklands mate i had a quick look but tbh didn't want to stay around centos too long as it'd only make me want to start building mine again when really i need to get my landrover finished lmfao

henseyseries3 said:

didn't want to stay around centos too long as it'd only make me want to start building mine again when really i need to get my landrover finished lmfao

Click to expand...

so many errors in that statement lol

I can relate to it... a sign of having too many cars

Well it's time for a long overdue update.
My plans for 2017 domination of the Association of South Eastern Motor Club and the Association of Central Southern Motor Clubs up to 1400cc Modified Production Sprint classes was bought to a halt by a change of job and some mechanical issues which are now history.
My first event of the year was a return to Abingdon for a Sprint which was the start of the mechanical problems, I noticed after each run that the engine was leaking a small amount of oil but couldn't see where from also on seeing some videos after the event there was a distinct blue cloud following the car, the oil leak was traced to the crank rear main oil seal which meant the gearbox had to come out to replace the seal......joy......but did give me chance to swap the original Sporting gearbox for an ex Punto Challenge gearbox.
With the seal replaced and the Cinq ready for Sprint number 2 at Rushmoor Arena in Aldershot the 2nd mechanical problem arose the day before the event when the flexible pipe between the fuel filler and fuel tank started leaking badly, this led to me having to cancel my entry......bugger.
It was at this time that I decided to have a custom 5L aluminium fuel tank made and move it into the spare wheel well as this will allow me raise the exhaust under the car at a later date and would also simplify refueling with less chance of leaks as the original external fuel filler wouldn't be used anymore.
It was around this time that I changed jobs and so finances also changed.
I had previously bought a second hand but never used Quaife ATB-lsd but had had the usual problems finding a gearbox with a bolted crownwheel to fit it into, my local breakers had a Punto Sporting 6 speed gearbox but when I borrowed it to check found it had the dreaded bonded crownwheel but a month later a mechanic chum had to replace the exploded gearbox on a Punto Grande and was happy for me to check the crownwheel before the box went in the scrap bin......bolted crownwheel.....result.
Punto Sporting and Grande both have 4.06:1 diff ratios so it was back to my local breakers to see if they still had the Punto Sporting box...he did...another result.
So I used the crownwheel from the exploded Grande box and bolted to the Quaife diff and fitted into the Punto Sporting box, it's a bit mix & match but seems to work ok, the Punto Sporting box was then swapped for the unused Punto Challenge box.
At the same time I decided to move the gearshift inside the car and shorten the gear lever length to give a shorter shift, I bought a steel bracket for the internal shift from eBay but when it arrived it weighed far too much so was attacked with the angle grinder and hole cutter to loose some weight, installing the gear shift and cables in the car was fairly straightforward with the only small problem being making to new holes fireproof once the cables were fitted.
I've been looking into a cheaper option for softer compound gripper tyres for a while as the "Standard" Avon A15/A92 slick that everyone seems to use would cost nearly £1000 for a set of 4 which for me is unrealistic, I did look into Yokohama slicks in a very soft Wet compound but here were still out of reach. Then I started reading good reports on the UphillRacers Forum about Extreme Performance Tyres Vr2 motorsport retreads that are available in a range of compounds and in a 175/50r13" size which is ideal for the Cinq, they're also E marked so are Road legal.
After talking to Rob at Extreme Performance Tyres (UK) a deal was done and 4 tyres arrived in their softest W4 compound, Rob said that this compound tyre would be ideal for short UK type Sprint events, these were then fitted to a set of 6j13 Superlites that I bought from a guy who has owns V8 powered Fiat 126 drag racer.
So with a 6 speed box,Quaife diff,quick shift gear change and sticky tyres we headed off to compete at Motorsport at the Palace held at Crystal Palace in south London.
GEE WIZBEES......THIS CINQ NOW HAS SOME SERIOUS GRIP!!!!!!.
Corner exit wheelspin has now gone allowing me to get on the power earlier.
The Quaife diff is very smooth and doesn't grab or pull to one side or the other.
The gear shift is now much improved and the old problem of missed shifts has gone.
The tyres are superb....it's as simple as that, this was the first time I have ever been able to generate some proper heat into the tyres and this was on a course which was only 40 seconds long.

So there we are, lots has changed but everything is a change for the good (even the lower paid job).

I'm still waiting for the 1170 engine which is being built but there have been problems with outsourced engineering but we'll get there in the end and then the Cinq will really fly.

Extreme Performance Vr2 motorsport retread tyres.

Update time again....
The Sprint season has now finished for me but it ended on a real high.
My last event was the Sprint Royale held at the Eelmoor Driver Training Centre in Aldershot and organised by the excellent Farnborough and District Motor Club, this was a venue I'd never competed at as last year's event had to switch venues at short notice and so I had no previous times to compare to.
The course was short and twisty and the tarmac was smooth so things looked promising for the Cinq, while waiting for my turn (I was number 65 out of 85) I was looking at the times set by cars in other classes that have been at previous events and thought I would get around the 66-65 second mark so was slightly shocked when my 1st practice time was 63.29 seconds......not bad for a course I'd never driven before.
2nd practice saw the time drop again by 2 seconds to 61.23.....even better!!.
In all my previous events the cars that have always beaten me have been a pair of very well sorted 1380 MG Midgets but at this event they were both slower than me.
During the lunch break it decided by me and my friends who'd come to watch that a 60 second run was definitely doable so as we lined up for the first timed runs that was my goal....61.49...not good..trying too hard and very sideways into one corner but good enough for 3rd in class still ahead of the midgets but 2seconds behind the leading 1380 Mini and 2nd place Frog Eyed Sprite.
The rear end seemed slightly lose causing the oversteer so before the 2nd timed run all the back suspension rose joints were checked but we're all OK, the rear tyres were slightly low so we're pumped back up.
I lined up again for the 2nd time and when the light went green had what I thought was an Ok tidy run so was amazed when the clock stopped at 60.68.....Yes!!!....a 60.
Position wise nothing had changed with the 1380 Mini leading, Sprite 2nd,Me 3rd and Midgets 4th and 5th.
The last timed run of the day was slightly slower at 60.91 but I had secured 3rd place in class.

I think the upgrades from fitting the Quaife diff and the Extreme Performance Tyres have been well worth it and are showing what the Cinq is capable of, I just need some more power and a bit more weight saving to hopefully be a regular top 3 finisher.

Well done! What's the class limit cc again??? ?

Hi purf, the upper class limit is 1400cc

presume this is the event you upoaded a vid of on facebook? car sounds immense btw

Yes that was Sundays event.

Could you share the video with rest of us too please?