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Messages - RobT

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31
ENGINES / Bioethanol and E85
« on: November 10, 2013, 10:26:45 am »
Hi All

Have had a thought project ongoing for some time about using ethanol to power my car, or more specifically E85, 85% anhydrous ethanol, 15% petrol. This was available in uk a few years ago at the pump, mainly at Morrisons Supermarkets, but now i dont think it is. It is however available all over Europe at about 1euro per liter.

Why is this if interest to performance car buffs? Well it has high octane, and runs very cool not unlike methanol. But it doesnt have the downsides of methanol such as hydroscopic nature, and it doesnt rot everything it contacts.

My engine man has done several race motors now to run E85 and says its fantastic. But, to get the most out if it, an engine has to be built to run it, high compression and with at least 30% more fuel flow capability. Mapping is different to petrol.

So.....i have been in discussions with msa about using it and they are ok with the idea so long as a specified fuel source is used, and the championship regs say its ok. Its possible this might happen for 2015.

I have found a source where 97% ethanol is available for under 1 per liter. To buy E85 from motorsport fuel suppliers is 3.50-4.50/liter. But i have been told discounts would be available for championship use.

Very interesting stuff, more power, burns lovely, cool running

Watch this space, may well build a alco screamer engine

Ave it

Rob

32
CHASSIS / Re: Custom Suspension Uprights
« on: November 09, 2013, 08:27:21 pm »
Roll center with my drop-pin modified uprights is 16mm.

33
CHASSIS / Re: Custom Suspension Uprights
« on: November 09, 2013, 07:32:57 pm »
Allan Staniforth was one of suspension gurus and came up with the 'string computer' to show how suspension changes dynamically. Its a good method.

Lean is due to the rotation of the cofg around the roll center. They want to be in same place. I had my car properly evaluated by a btcc suspension engineer and have the roll center figs somewhere.....will dig them out. Cofg is a couple inches above crank center line.

34
CHASSIS / Re: Custom Suspension Uprights
« on: November 09, 2013, 06:52:34 pm »
Need to factor in car roll, thats why camber goes positive

35
CHASSIS / Re: Custom Suspension Uprights
« on: November 09, 2013, 06:11:34 pm »
Wishbones want to be level at average suspension position, to minimise geometry change about this mean position. And as long as possible for same reason.

This inevitably means they need to point down at rest, but maybe not by much if the spring rate is high.

Mine are just pointing downhill a couple of degrees

36
CHASSIS / Re: Custom Suspension Uprights
« on: November 09, 2013, 02:53:47 pm »
Seem to recall Brian mentioning he had made a front suspension geometry model???? Would be worth comparing the dimensions with what you have Tom

37
ENGINES / Re: Super waterpumps
« on: November 09, 2013, 01:15:34 pm »
yep - the gurney will cause a negative pressure zone behind it and suck air out of louvres

38
ENGINES / Re: Super waterpumps
« on: November 09, 2013, 11:57:58 am »
I only have a half height rad, but with ducting like tom says it seems fine - nice quality WRC-spec core though from Radtec

The ideal solution is to have an air outlet duct on the back of the rad but we just dont have space for it. Have considered a couple rows of bonnet louvers above the back rad area - that might be a good move.....

39
ENGINES / Re: Heat management ?
« on: November 09, 2013, 11:55:06 am »
Yep - coated all way to head, including 10mm thick stainless flange - as per recommendations of my engine man with many 2.1 / 2.2 turbo valvers making 500+hp. Seems ok to me.

40
THE WELCOMING COMMITTEE / Re: Hi
« on: November 09, 2013, 10:12:55 am »
Good stuff, nice to see you over here

41
ANY IDEAS? / Re: Forum parts buisness
« on: November 09, 2013, 10:08:51 am »
Arb is ace. Nicely adjustible and great when it rains. Fits std mk2/3 mounts but needs tabs welding or bolting on strut bodies to attach. Could be made available.

42
ANY IDEAS? / Forum parts buisness
« on: November 09, 2013, 09:48:15 am »
Hiya, just floating this idea but dont want it to have any impact on Jasons growing buisness at all, idea is to enhance.....but if its stupid, please delete.

Tom has just made those lovely steering rack brackets. I have loads of bits i have had made, eg adjustible arbs. There us a massive shortage of pukka race bits for our cars. How about we make them available here? Also, with the engineering excellence presence, we should fill the gaps for the bits not available today.

I could start a list....but lets see what Jason thinks first.

43
ENGINES / Re: Golf 16v catch tank and breather build.
« on: November 09, 2013, 09:27:18 am »
Yep like the oem breather, good find

44
GENERAL CAR CHAT / Re: My new F1 R+D Blog
« on: November 09, 2013, 09:24:28 am »
Really very very good indeed. Well done sir. Count me in for the valver f1 head when you make it!

45
CHASSIS / Re: Solid MK2 steering rack mount.
« on: November 09, 2013, 09:23:08 am »
Lovely job. You could sell those via jason.....

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