Donors for a mid-engine one-off

Donors for a mid-engine one-off

Author
Discussion

AdamR172

71 posts

145 months

Wednesday 25th November 2015
quotequote all
I getcha - well - I am sure chain drive can be made to work with reverse too. Maybe a table of all the pros, cons, weights and costs is in order... The performance : cost ratio you get out of a bike engine is insane though...

ugg10

681 posts

216 months

Wednesday 25th November 2015
quotequote all
Have a look on here, these guys make custom bike diffs (chain driven) and then you add another sprocket and a pre-engaged starter motor to act as a reverse.

http://www.westwalestrikeshack.co.uk/


Steve_D

13,737 posts

257 months

Wednesday 25th November 2015
quotequote all
AW111 said:
Just to clarify : I am in Aus, so different rules apply, but yes, reverse is one of the mandatory requirements.
Car will also have to be tested for torsional stiffness and bump steer, among other things.
Oh, bad luck. Most think IVA is a pain to get through but I believe your test can be even worse as it is back to our pre-IVA days where it is 'In the opinion of the tester'.

Best of luck.

Steve

AW111

Original Poster:

9,455 posts

132 months

Monday 30th November 2015
quotequote all
Steve_D said:
Oh, bad luck. Most think IVA is a pain to get through but I believe your test can be even worse as it is back to our pre-IVA days where it is 'In the opinion of the tester'.

Best of luck.

Steve
Both the bump steer and torsional rigidity are quantified, but things like fabricated uprights require a lot of supporting evidence to satisfy the inspector / tester.


SpridgetMitch

29 posts

128 months

Tuesday 1st December 2015
quotequote all
As another antipodean I have considered the same question as yourself.
If you haven't already I would be joining http://www.ozclubbies.com.au/ There aren't many mid-engine projects on there but there is plenty of knowledge and even an engineer who does ICV's.

I am leaning towards tiny forced induction engines to use in a middy. In particular the 1L ecoboost in a Ford Fiesta or the 875 Twinair in a Fiat 500.

One thing to consider is that the front uprights of fwd Macpherson strut car can be adapted to be used as a double wishbone setup. There are a couple of options:

Graber cars La Bala. It uses a bracket to mount a ball joint to and a tapered piece at the end of the wishbone. You can see it here:


Sylva J15 uses a fwd upright upside-down and uses the bolt hole for the strut with a bracket to keep the upright from twisting. These pics should show it:








AW111

Original Poster:

9,455 posts

132 months

Tuesday 1st December 2015
quotequote all
SpridgetMitch said:
As another antipodean I have considered the same question as yourself.
If you haven't already I would be joining http://www.ozclubbies.com.au/ There aren't many mid-engine projects on there but there is plenty of knowledge and even an engineer who does ICV's.

I am leaning towards tiny forced induction engines to use in a middy. In particular the 1L ecoboost in a Ford Fiesta or the 875 Twinair in a Fiat 500.

One thing to consider is that the front uprights of fwd Macpherson strut car can be adapted to be used as a double wishbone setup. There are a couple of options:

Graber cars La Bala. It uses a bracket to mount a ball joint to and a tapered piece at the end of the wishbone. You can see it here:


Sylva J15 uses a fwd upright upside-down and uses the bolt hole for the strut with a bracket to keep the upright from twisting. These pics should show it:

Thanks.

I knew of the laBala, but the J15 looks interesting. I have a slight dislike of running upside down ball joints, but can't give a rational reason.

Like you, I was also considering the ecoboost, but hadn't thought of the twin air.

ps I have lurked on ozclubbies, but not joined as yet.

SpridgetMitch

29 posts

128 months

Tuesday 1st December 2015
quotequote all
There's nothing wrong with running them the right way up, (ozlubbies forum member photos) below is some corolla uprights used in an IRS setup.



Mr2Mike

20,143 posts

254 months

Thursday 3rd December 2015
quotequote all
SpridgetMitch said:
There's nothing wrong with running them the right way up, (ozlubbies forum member photos) below is some corolla uprights used in an IRS setup.
That is a worrying upper "wishbone" design. All longitudinal forces (e.g. braking/acceleration) are being restrained by a single tube in bending.