The other rotary Westfield!

[12at]

Looks very nice these days... Good to see the :censored::censored::censored::censored:y  noisy ported motor gone also!!

[Smiffers]

I thought that I had posted this but obviously not!  Here are the completed oil cooler intakes.  Now just down to the business of tuning the thing!

[boosted]

Hi Mate, have not seen yours for a bit. Hows yours progressing?

[Smiffers]

Sorry!  I forget to keep the world informed at times...

Had a great breakthrough this weekend!  More on that in a moment...

Corner weights and geo all done 530KG wet (Full Tank),  very good experience with the chap that did it for me very happy with the weight as contrary to popular belief the rotary is not the lightest engine gearbox combo around (although the weight is all in the right place).

Took the car down to Stoneleigh as it was being exhibited there, very well received and a great weekend.  Gave some needed motivation!

Then the breakthrough; I have been fighting with a issue with the car as it approaches the APV operation point around 6500rpm it just would not get passed the transition point.  Now I\'m running a standalone ECU (for which I have had to map from first principals with zero previous experience) with all the intake valves and I have manufactured a solid state APV motor controller myself, so naturally I was looking at all of those problems and not opening my eyes to some traditional fault identification.  So at the weekend trying to work it all out the problem got worse to the point the car would no longer cruise at low rpm.  Limped home lifted the bonnet and notices the the fuel pressure was bouncing about a little and the pump hunting, checked the MAP and that was rock solid...  Maybe I should check the fuel filter and non-return valve...

And there we have it clean the fuel filter reassemble everything and my fuel pump is super quiet and the fuel pressure bang on the money.  Take the car out for a drive and apart from the fueling being all over the place at many points I can easily rev all the way up to the red line with all of the valves, three stage injection and APV working at Mazda intended.

So now I just need some tuning time and we are done

To say I am pleased is the understatement of the century.

[boosted]

All good then mate! Ive have a few minor niggles but getting there..good luck with the mapping never done any myself!

[Smiffers]

Thought I would share the next bit of the project.  A RaspberryPi based data logger.  Here is the functional diagram of what we will be building...

[boosted]

Cool, can you get a camera on there as well?

[Smiffers]

Yes, we are going to do a simple test with some rendering on low res video on the pi.  But my day job is broadcast so we are also going to play with some 4k capture for demo material for the business.  Unfortunately the Pi will not be able to chew through that!

Good progress this weekend.  I can now read Adaptronic ModBus and Race Technology serial streams and write them to log files...  Have also worked out the dash button press messages so we can add markers and start/stop the logger.

Progress I tell you!

As part of the process I also made some progress tuning, things are getting better.

Noted some performance from the logs.

3.2sec 30-70 - Uphill, pig rich and with very conservative timing...  This thing could be interesting.

Although I am a little worried about my gear ratios, I cant imagine using 6th or 5th for that matter.

What final drive have you got?

[boosted]

4.1 at the mo but jury still out on whether i swap out to 4.7...At combe used 3rd and 4th on all the corners and 5th on the longest straight. But i\'m swapping to 13" and slicks so gonna decide after ive seen the gains with that. hill climb your gonna be in the lower gears i found 5th to be taller than 3rd and 4th but tbh ive never been over avon rise that fast before and my right foot was lifting...

[clive]

To say I am pleased is the understatement of the century.

Real pleased for you and to see you going properly in the right direction, excellent workmanship :Thumbsup!

p.s I think both you and Jon will end up with 4.7 diffs to get the most from your  amazing Rotary cars

[boosted]

HI mate, can i ask your front and rear offsets, brake set up front n rear pls...also what tyres/wheels width etc...i know your widebody and im narrow bod...but just checking my maths and measuring right!

[Smiffers]

Sorry chap been overseas wrking for a few weeks...

Do you still need all the info - I will go do some measuring tonight...

The big numbers are 13x10 on the rear 13x8 front (I use compomotive minilite style wheels, can\'t remember the model), I use the ali cortina style uprights (siltech) in the front with M16 style 4 pot (Raceleda R-16) on non vented nothing special disks.  Westfield ali \'race\' (No handbrake) spec rear brakes (these are re-branded hi-spec calipers) on standard sierra cosworth rear disks again solid.  Running Girling master cylinders (Which are worth every penny after the :censored::censored::censored::censored: wilwood alternatives, I had two fail) in sizes I will look at later, standard balance is very good with the bias bar in the center.  Pads are personal choice so I will stay out of that conversation, most of them work as long as you put them in!

Remember you do not need to go big and fancy with a 500kg car the weight of the assemblies will gain you far more advantage.

I\'m off to Abingdon on the 20th for a shake down and some top end tuning work if you fancied it?

[Smiffers]

I should also add,  low speed mechanical grip is super important in hill climb and there is a huge trend for super wide wheels and tyres at the moment.  This comes at a cost of increased un-sprung mass, which in turn requires smart management through expensive damping.  For circuit where lap after lap consistency (in my mind this relates heavily to how compliant the car especially given lower level of experience with a particular platform) is of the up-most importance.  For us mortals with smaller budgets I would probably end up with 13x8 rear, 13x7 front if I had my time again and had not inherited the wheels with the rolling chassis.

[boosted]

Hi mate,
Waiting on suppliers...to make the wheels! going 13 x6 and 13 x8 compo motive or team dynamics 13 x7 who ever makes em first! Will get the former for next year. Sussed my offset need a et23 for 7j.

number of geo guy would be great though mate.

got a pesky oil leak atmo so not a lot happening.

thanks Jon

[boosted]

Not racing til i get slicks and 13s...last in class no fun lol.