what do you think about this layout with two cbr engines. do you think that the second engine like this will make a diffrence. i should of out the engine on the passenger side lol
adam



[Edited on 26/12/07 by oadamo]

I think you'll run into difficulties using a chain in this scenario.

JoelP went through a load of options for twins a while ago in a bid to find a cost-effective way to do it. Search is your friend.

my conclusion was that twin bike engines was a fairly inefficient way to the power, certainly not cheap. Its easy enough to link them like this, but getting them to pull together is the key.

Ps your second engine would sit in the passanger seat quite well.

I'd just actually build a real car you can drive with one engine..... IF its not quick enough worry about it then......but it will be quick enough..........properly set up 90bhp Locost race cars embarrass seriously more powerful cars.....ask Chris Mason

Although the fitting of two engines in theory should work.

In reality. You'll probably, never be able to sychronize the two.

Ronnie

i was just thinking about it because the second engine could be added later on after the cars built. and then if it doesnt work it could be taken out easy.
adam

Havee you ever seen the video of the Z cars westfield where they deliberately miss select gears on on of the engines ?

Doesn't make one iota of a difference.
OK, the car sounds a bit odd, but being in different gears or having slightly different throttle openings at the same time isn't a deal breaker.

Having the two engines driving different axles is an entirely different thing of course.

How do those drag tractors work...some of them have like 6 blown V8s....are they all running hydraulic pumps or something?

ive got to cbr 400 engine in my shed i might have a look if i can join the two together some how. and rig some kind of test rig up at work.
adam

two engines driving each rear wheel works and there is no probs at all-all the crap about sync the engines rubbish- one engine pushing you in circles rubbish- ask russ. i have experianced it and there is no probs apart from the packaging probs..... but they are a bit of a headache!!!!!!!!!!!!!

If you do a search then the pitfalls / disadvantages have been discussed at length several times before, so I won't go into them in detail again, but in summary twin engines are a bloody expensive way of making an unreliable car! A good friend of mine built a twin ZX9 Westfield using a Z Cars transfer box. This is the most proven (out of an unproven bunch) way of doing it but its expensive and still not reliable. A lightly blown turbo busa putting out about 250bhp would accelerate just as well, cost about the same to build and that would be more reliable and weigh significantly less.

Chris

[Edited on 27/12/07 by ChrisGamlin]

I see a twin ZX9 engined car around during the summer. It can run the engines together or independantly, through a transfer box. It sill only manages 0-60 in 3.2 secs, so I think its good as a feat of engineering, but too heavy to be worth the effort. Only my opinion though.