ade
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| posted on 30/8/03 at 09:03 PM |
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irs chassis
any body know when ron champions new book comes out. should i hold my breath or go a different route.
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JoelP
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| posted on 30/8/03 at 10:08 PM |
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someone said it kept getting put back. I myself would get an older copy and work from there, maybe modifying the plans slightly. Its not too hard once
you're started. Theres plenty of help on here anyway if you get stuck!
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ade
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| posted on 30/8/03 at 10:19 PM |
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IRS CHASSIS
THANKS FOR THAT. JUST MADE THREE QUARTERS OF A R.C CHASSIS.BUT NOT HAPPY WITH IT. CANT DECIDE WETHER TO GO THE CORTINA/CAPRI AXLE ROUTE OR RE-THINK
WITH IRS. ANY SUGGESTIONS/
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jcduroc
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| posted on 30/8/03 at 10:31 PM |
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quote:
Originally posted by ade
THANKS FOR THAT. JUST MADE THREE QUARTERS OF A R.C CHASSIS.BUT NOT HAPPY WITH IT. CANT DECIDE WETHER TO GO THE CORTINA/CAPRI AXLE ROUTE OR RE-THINK
WITH IRS. ANY SUGGESTIONS/
If I were at that point I'd go for a modified/new rear end for IRS; but that's just my opinion!
Cheers
Joćo Matoso
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ade
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| posted on 30/8/03 at 10:45 PM |
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IRS CHASSIS
THANKS. LOOKS LIKE ITS TIME TO PUT A NEW BLADE IN THE HACKSAW.
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stephen_gusterson
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| posted on 30/8/03 at 10:49 PM |
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you will add a lot of time to your build if you go IRS.......
atb
steve
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Mark Allanson
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| posted on 30/8/03 at 10:55 PM |
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The Capri or Cortina route is so quick and simple, Although my car is not on the road yet, I think the difference in handling is so small that is is
definately worth considering
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andyjack
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| posted on 31/8/03 at 02:29 AM |
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I have given this a fair bit of thought and to be honest the jury is still out. However I think I am leaning towards a IRS set up. My main reason for
this is that Sierra donors are two a penny and I think it is fair to assume that Sierra parts will be available at a realistic price for much longer.
I also think that Sierras will become the standard donor as the other cars become like rocking horse poo. This will lead to a much larger selection of
off the shelf Sierra based Locost parts.
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ade
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| posted on 31/8/03 at 11:36 AM |
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are there any companys or individuals offering plans for an irs chassis. no matter how much i weigh up the pros and cons of either route, im still
drawn to the sierra.
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JoelP
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| posted on 31/8/03 at 11:47 AM |
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You are undoubtedly right about sierra parts. It would be possible to use a sierra donor and purchase a live axle separately, if you wanted, then you
would save effort and still have the simplicity of sierra parts. Having said that, escort and other parts will be around for ages, even if the cars
aren't.
Irs would be harder than a live one i guess, but it depends on your priorities, if you want it quick and easy or slower and IRS! choice is your
mate!
You could make plans for IRS yourself, you would have to work out what you wnated it to look like (ie what wishbone setup etc), i just used the entire
rear subframe off the sierra, but that is a bit heavy i suspect - certainly couldn't lift it easily.
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ade
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| posted on 31/8/03 at 12:13 PM |
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cheers. looks like i'l be putting my c.s.e engineering drawing to use[23yrs ago].
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stephen_gusterson
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| posted on 31/8/03 at 10:27 PM |
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I can bet now that after you have looked at all thats needed to make up rear uprights, mountings, pivot points, posed for hours over the geometry,
etc, you will remember that a cortina axle would have been sooooo much easier.
From one who learnt the hard way.
As for 'long term spares availability' I have been on sites like this for 3+ years. It seems that its quite rare for people to keep their
cars more than 2 - 4 years. Also, in the unlikely event that your cortina axle fails, there WILL be companies that can repair it and there WILL be
other axles around.
In 10 years time sierras will be VERY rare.
atb
steve
[Edited on 31/8/03 by stephen_gusterson]
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blueshift
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| posted on 1/9/03 at 12:04 AM |
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Just for those who aren't aware of it, if you want to use sierra parts but find designing IRS rather daunting, have a look at de dion.
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craig1410
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| posted on 2/9/03 at 10:49 PM |
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As Blueshift says, look at the de-dion option. You can use a Sierra diff and running gear but with all the simplicity of a live axle 5 link suspension
system. Take a look at my website and the numerous discussions on this subject of late for details. Feel free to email me if you want to discuss any
specific aspects.
Also, be aware the GTS Racing are planning a de-dion kit. Contact user "dozracing" on this forum for details or visit the GTS Racing
website on http://www.gtscougar.freeserve.co.uk
I hope this helps,
Craig.
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thekafer
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| posted on 2/9/03 at 11:54 PM |
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to irs or not to irs.
Have you considered the dedion route?You will have to mount the rear gear box, but the rest is largely the same four link arrangement with either a
watts linkage or panard rod.I'm thinking of going this route myself (mostly because i'm the laziest sloth to grace the planet)because it
is the best of both worlds (according to caterham)and much easier than an irs set up?
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blueshift
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| posted on 3/9/03 at 04:30 AM |
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is there an echo in here?
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Noodle
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| posted on 3/9/03 at 05:44 AM |
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quote:
Originally posted by thekafer
You will have to mount the rear gear box
There's no need to rear-mount the gearbox. That was a preference of the Alfa/Volvo 340 layout to equalise weight distribution in a nose heavy
car. Caterham use a normal front-engined, Ford gearbox and separate de-dion rear.
Cheers,
Neil.
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DaveFJ
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| posted on 3/9/03 at 07:50 AM |
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If you still want to go down the IRS route:
some people have 'grafted' the irs setup from the tiger Avon onto a book chassis.
I don't personally know how well this works or what success they had but it is possible and the plans are in the much loathed Tiger Avon
book.
HTH
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JoelP
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| posted on 3/9/03 at 12:19 PM |
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One cheating way to use sierra irs is to use the entire rear subframe, then all the mountings are in the right place (for the diff and the
bones/trailing arms). Bit heavy though, and if i had bigger balls id have done a deDion.
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DaveFJ
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| posted on 3/9/03 at 03:27 PM |
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The Tiger Cat e1 uses the full rear end set up straight of a sierra - looks very heavy and damn awkward to me....
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mreveready
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| posted on 3/9/03 at 04:37 PM |
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IRS
Food for thought..
If you decide not to go the IRS route be consoled with the fact that most RACE preped chassis are either De Deon or Live!
Depends what you want it for?
Comfort  - IRS
or
Power down  - Live axle or better still De Deon.
The pleasure has been all mine.
http://www.mreveready.com Online at last.
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