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So here's the script. . . .yeah another car thread

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thegubner
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PostPosted: 07:08 - 25 May 2009    Post subject: So here's the script. . . .yeah another car thread Reply with quote

I have an s reg fiesta diesel, its going to be stripped down to a bare shell. Then its going to have two bike engines put in the back. The bodywork is going to be chopped about and sheet metal will be used to change things. Its gonna be rear wheel drive and mental hopefully.

Its kept at work where we have the tools to do it and a couple of ramps to use, it needs to be road legal for use as a hill climber and novelty car.

Questions . . . What bike engines would you use? . Any gentle ideas for the engineering? . .what would you change bodywork wise?


Ta
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SoND
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PostPosted: 07:20 - 25 May 2009    Post subject: Re: So here's the script. . . .yeah another car thread Reply with quote

the_guvnor_1_uk wrote:
what would you change bodywork wise?


All of it. Chequered aluminium would be sweet if you've got a few thousand to waste on material.

Can't suggest anything else. Sounds like a pretty cool idea.
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Johnny GSX-R
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PostPosted: 07:24 - 25 May 2009    Post subject: Reply with quote

Are you having a laugh??

FFS man. The entire rear floor will have to come out and you'll need a 'Z' cars style rear subframe install. For hillclimb you'll need loads of torque to compete so BUSA engines are favourite for this.

Cheapest way forward is to buy a de commisioned AUTOGRASS class 7.

https://www.youtube.com/watch?v=2O1y105ytQY&feature=related
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Johnny GSX-R
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PostPosted: 07:26 - 25 May 2009    Post subject: Reply with quote

Just remember that a bike gearbox is NOT designed to push all that weight around and they often fail on car installs.

Avoid the Kawasaki ZZR engine/box as its really weak.

You'd get a Blackbird engine now for around a grand but make sure its carbed not injected.
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binge
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PostPosted: 07:51 - 25 May 2009    Post subject: Reply with quote

You'll need an electric starter motor or winch on a reverse mechanism for your reverse gear.
Needed to be road legal.




Ben
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thegubner
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PostPosted: 08:41 - 25 May 2009    Post subject: Reply with quote

Johnny. . . . .

Engine wise, i was hoping two 1000cc nineties sports bike lumps from crashed bikes would be sufficient to push a stripped down fiesta about at a half decent pace.

Binge . . .

Good thinking batman.


We're not after building a race winner, just something quick and fun that stands a chance of not coming last, its gonna be hard but between my boss, myself and bcf i think we can do something pretty cool, cheers for the replies, all ideas and input welcome.

Andy
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binge
Emo Kiddy



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PostPosted: 09:04 - 25 May 2009    Post subject: Reply with quote

So I am guessing you will be running the two bike engines side by side. Horizontal to the car.

What will you be using to drive the wheels?



Alot of the bike engined mini conversions use a modified Siera rear diff.
From the Diff box is a Sprocket. And then linked to the engine with a drive chain.

Some conversions use a shaft drive mechanism.


Just curious as to how you are going to do it with two out put shafts? Run dual chains?






Ben
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Robby
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PostPosted: 09:50 - 25 May 2009    Post subject: Reply with quote

A couple of the kit car boys have gone for early 90s CBR1000s - very cheap bikes these days. I don't remember how they sorted the final drive, but one of the projects is on www.locostbuilders.co.uk

Not sure if you'd have the width for a pair of straight-4s, unless you put them in sideways. If you do that you're going to need a pair of sprocket to driveshaft output adapters, and a way of taking the drive from two shafts and putting it into one diff.

In short, it'll take 3 or 4 years minimum, and costs 8 times as much as you originally thought, then be unreliable and largely undriveable. You'll wish you bought a caterham.
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chrisw
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PostPosted: 10:05 - 25 May 2009    Post subject: Re: So here's the script. . . .yeah another car thread Reply with quote

the_guvnor_1_uk wrote:

Questions . . . What bike engines would you use? .


None, stick with a car engine, you'll never get a Fiesta light enough.

You want a hooligans car, stick a YB in there.
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bazza
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PostPosted: 12:33 - 25 May 2009    Post subject: Reply with quote

To save time:

1. Half-heartedly hack some bits off the car.

2. Drop the car off at the scrapyard.

3. Burn several thousand quid in an old oildrum.

4. Ask everyone you know to kick your arse around whilst calling you a fucking idiot.

This will put you in exactly the same position as you'll be in at the end of your project, minus the years of wasted time.
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Last edited by bazza on 19:05 - 25 May 2009; edited 1 time in total
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colin1
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PostPosted: 16:18 - 25 May 2009    Post subject: Reply with quote

I think bazza may have a point, and thats assuming the project gets completed.

I seem to remember that Robby started a project.

From memory, I think Johny gsxr bought his bike engine powered car already made.

Virus's project to make a trailer to attach to his bike nearly ended in tears, when there was a near miss or an accident or something.

Basically vehicles are tricky to bodge together from bits that arent designed to fit together.

People do engineering degrees to help them with this stuff, as its well worth working things out first rather than just chucking stuff together on the off chance it works.

Though I have to admit I admire the balls for anyone who starts a project with no experience, and I do sort of hope they finish it, or dont kill themselves.
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Robby
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PostPosted: 16:24 - 25 May 2009    Post subject: Reply with quote

colin1 wrote:
I seem to remember that Robby started a project.


Then gave up on once I realised how much time and money it was going to cost me to build something I could buy a better example of for £4-5k.
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Blackwolf
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PostPosted: 18:32 - 25 May 2009    Post subject: Reply with quote

i do like the idea of these projects. but i think i would get half way and get stuck then give up haha.


there is a guy around where i live. with a old mini cooper with a GSXR engine in. car is coverd in carbon fiber and goes like stink.

last time i saw him he was having trouble cooling the engine ( little air flow. he said he was deciding between an roofscoop or like side scoop things at the back for the air... ( something to think about?) and your speedo wil have to be re-caliberated.


keep us updated i forone would like to know how this plannes out Smile
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WildGoose
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PostPosted: 18:32 - 25 May 2009    Post subject: Reply with quote

We've all been there with ideas like this I think, bazza's assesment is correct for 95% of attempts.

It's hard enough to even change an engine to something non-standard, and get it to fit and run again. Cosworth into another ford car is a popular one, and even that can turn into proper fun and games getting a working example at the end.

A cosworth engined transit very much tickles my fancy, but i'd favour buying one that someone else has poured the hassle into so I can just drive it.

You really need money to burn for these kind of things, and chances are it will never turn out right, or even turn out at all.

You need an engineer who knows what they are doing, which is why these niche engineering companies still manage to stay afloat.
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Blackwolf
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PostPosted: 18:48 - 25 May 2009    Post subject: Reply with quote

[quote="WildGoose"]

A cosworth engined transit very much tickles my fancy, but i'd favour buying one that someone else has poured the hassle into so I can just drive it.
quote]


ill allways give a hand... Thumbs Up

as long as i get a go Wink
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karoshi
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PostPosted: 07:56 - 26 May 2009    Post subject: Re: So here's the script. . . .yeah another car thread Reply with quote

the_guvnor_1_uk wrote:
Questions . . . What bike engines would you use? .

Vmax engines, turbocharged


the_guvnor_1_uk wrote:
Any gentle ideas for the engineering?

one mounted backwards so that the two gearboxes / sprockets run out towards the rear arches of the car.. the backwards one will need a two-cog mechanism (or figure of eight chain?) to reverse the drive direction

both running chains down over rear sprockets mounted onto VFR style single sided swing arms mounted as independent rear trailing arm suspension units on either side of the car, giving you two one wheel drive systems

twin control systems to lock the throttles together but you could have a throttle biasing system to give you a power-on equivalent of fiddle-brakes?

air intakes for the chargers running out infront of the rear arches a-la metro 6r4


the_guvnor_1_uk wrote:
. .what would you change bodywork wise?

enough that it didn't look like a fiesta? go retro and find a Fiat Strada Abarth or something? Very Happy
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chrisw
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PostPosted: 09:03 - 26 May 2009    Post subject: Reply with quote

LukeVFR wrote:

Twin-engined Corsa with 2 C20LET (turbo) engines putting out near 500bhp each...


There's nothing new under the sun.

Having seen a few twin engined cars run, they are just as underwhelming as bike engined cars. To much weight.

There is a very simple rule to build seriously quick cars:

Simplify and add lightness

Stick with that and you won't go wrong.
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Ariel Badger
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PostPosted: 09:20 - 26 May 2009    Post subject: Reply with quote

If I was going to build a car for fun but not a championship winner I would steer well away from multi motorcycle engines and go for the brute force of a yankee muscle engine like this https://www.northtexasamc.com/pdf/HMM_Project_HMX_Part_2.pdf Tune that and you have a decent powerplant. The car should be there just to hold the engine to the transmition and you to the steering.
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Wafer_Thin_Ham
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PostPosted: 11:02 - 26 May 2009    Post subject: Reply with quote

chrisw wrote:


Simplify and add lightness

Stick with that and you won't go wrong.


The Lotus mantra then.
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thegubner
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PostPosted: 08:18 - 27 May 2009    Post subject: Reply with quote

Just read through the thread properly and there are some interesting replies.

Me and the boss had a good chat about an hour after posting the thread. Due to the fact that it probably will end up an abandoned money pit we have had a change of plan.

He has a lot of experience with modified fords and fords in general so we are going to strip it down as planned and make ourselves a sierra powered 4x4 fiesta.

Not the most exciting thing in the world granted but should certainly be fun.

Watch this space.
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