Nitrogeno25
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| posted on 19/8/05 at 04:53 PM |
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Quick Steering
I read somewhere some time ago that someone provides a box that consist of two gears and reduce the steering turns. As there are't quick racks
for mine, how safe are this devices and what do you think?
It looks simple.
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JoelP
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| posted on 19/8/05 at 04:57 PM |
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id be a bit paranoid myself, you would want to be VERY sure that it was failsafe 
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Fred W B
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| posted on 19/8/05 at 06:36 PM |
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Has been discussed here before, avalible form USA circle track parts suppliers. Think they are called "steering quickeners"
cheers
Fred WB
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Peteff
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| posted on 19/8/05 at 07:10 PM |
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Rorty posted about one that was adjustable, not sure where it was from though.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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NS Dev
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| posted on 19/8/05 at 07:12 PM |
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a lot of autograssers used to use a chain drive, commonly a duplex timing chainset from a mini or the like, probably a bit crude for on road use
though.
It's not too hard to make a rack remember though.
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Fred W B
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| posted on 19/8/05 at 07:22 PM |
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Chain drive -
I saw two sprockets and a chain used like that once , but as a dodge to connect a steering shaft to the rack input, when a transplanted engine got in
the way of the original steering shaft position.
If I had a photo I would post it to start a thread titled "Worst detail seen on a modified or fabricated car"
Cheers
Fred WB
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britishtrident
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| posted on 19/8/05 at 07:49 PM |
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"Only one will be left at the quickening"
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Peteff
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| posted on 20/8/05 at 07:13 PM |
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Connor McCloud it is then 
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Rorty
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| posted on 22/8/05 at 05:35 AM |
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I haven't looked it up, but I do seem to remember posting some details of steering quickeners before. Look for quickeners made by Afco, Coleman
Howe, Pro Lite, D&M etc. The most common ratios are 1.5:1 and 2:1.
I have used the Pro Lite on some of my cars, but most of the quickeners are designed for heavy Yank cars and are built proportionately. Some run
multiple gears, some use paired planetry gears and some use 3/8" sprockets and simplex chain.
Two 1/4" hub sprockets and a length of 1/4" chain have worked well for me in the past in sub 1760kg cars.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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NS Dev
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| posted on 22/8/05 at 08:00 AM |
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quote:
Originally posted by Fred W B
Chain drive -
I saw two sprockets and a chain used like that once , but as a dodge to connect a steering shaft to the rack input, when a transplanted engine got in
the way of the original steering shaft position.
If I had a photo I would post it to start a thread titled "Worst detail seen on a modified or fabricated car"
Cheers
Fred WB
I have seen this on many autograss cars, as I said. Whilst it isn't a setup that I would aspire to have, I have NEVER heard of a failure, and
these cars use their steering pretty violently during the average race!!!
On these cars it is always done to speed up the steering, and cam drive sprockets are very handily timed at 2:1.
On my autograss car I use a special rack, from GB Engineering in Nantwich (as do most grassers) which gives 1.5 turns lock to lock and costs £150
brand new and is centre drive and fully diy rebuildable. I also use modified Cortina uprights (steering arms shortened and altered in height) which
gives me 0.8 turns lock to lock and about 75 degrees of lock on the "tighter side" wheel.
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Fred W B
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| posted on 22/8/05 at 08:48 AM |
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Re chain drive in steering
Fair enough - It just didn't strike me as a particularly elegant detail.
Do you not get a bit of slop in the system though? I suppose it doesn't matter so much on dirt. I found in karting that once the track rod ends
develop any sort of slop you had to keep making small steering corrections through a long sweeping bend. Of course, karts do have very direct steering
which would emphasise the effect.
Cheers
Fred WB
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NS Dev
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| posted on 22/8/05 at 11:45 AM |
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yes, there is a small amount of play, even with the chains kept nice and tight. As you say, it's not really noticeable on dirt, but would be on
tarmac I guess.
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Rorty
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| posted on 22/8/05 at 01:25 PM |
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It's no more noticible on the road than some conventional systems. The D&M quickenerI mentioned above is chain drive and is for bitumen
use.
Here in Oz, one of the most common (and approved) methods used by conversion companies on LHD cars and trucks imported from the US is to run a chain
drive behind the dash to the original RHD steering box. Don't knock it until you try it!
I've designed my own racks now though, so chain drive reduction is a thing of the past.
FYI, some private conversions here use RHD steering boxes and racks (where available) from the RHD Chevy and Ford US street sweepers/utility vehicles
etc. which virtually bolt straight into the C10, C15, C20 and F100, F150 and F250 pickups.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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Nitrogeno25
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| posted on 22/8/05 at 01:35 PM |
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First of all many thanks to all for your replies!!!
Now the question should be, Is It worth?
I'm building with a Chevette rack and it is like 20 turn to each side  but who knows when I finish the car what would happend!
Gonzalo
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NS Dev
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| posted on 22/8/05 at 02:56 PM |
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chevette as in Vauxhall chevette?
if so, quick racks are available off the shelf for these anyway.
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