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Difference between coil spring trumpets and cone trumpets
https://www.ausmini.com/forums/viewtopic.php?f=2&t=99518
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Author:  clip [ Sat Dec 07, 2019 8:31 am ]
Post subject:  Difference between coil spring trumpets and cone trumpets

I've just found out that I've got coil spring trumpets on my rear suspension instead of ones to suit rubber cones. I didn't know there was a difference. The ones I bought I assumed were for rubber cones and came as a set with the hilos. Can't find anything anywhere about the differences though.

Author:  850man [ Sat Dec 07, 2019 8:52 am ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

Matt Reed has already explained the difference to you on another forum.

Author:  clip [ Sat Dec 07, 2019 9:29 am ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

on another forum?

Matt discovered it for me as he's doing my engine work at the moment, and talked through some differences. I'm just putting it out there for others as none of the online shops that I've looked at indicate alternatives. Matt also explained how they came onto the market and I'm just a bit p*##ed about it. Talking about Matt though, it's incredible the knowledge he has, and is happy to share. Very glad he's doing the work for me.

Author:  TK [ Sat Dec 07, 2019 11:35 am ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

well what is the difference?

Author:  850man [ Sat Dec 07, 2019 12:13 pm ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

TK wrote:
well what is the difference?

The "shelf" that the spring sits on, is much smaller than what is required for rubber donuts. When they are used with a donut, they do not provide the same support & hence change the spring rate of the rubber. The larger the base, the more support.

I doubt the seller has any idea what they are selling, most of them these days are simply moving on cheap, Chinese made imported junk.

Author:  drmini in aust [ Sat Dec 07, 2019 12:28 pm ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

Many used to be cheap Indian made sand cast rubbish. :(
Both Matt Read and Karcraft have had them made locally from billet alloy.

Author:  Bubbacluby [ Sat Dec 07, 2019 7:58 pm ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

Can you share a picture to help those less kniwledgeable. I would like to see the difference.

Sent from my SM-N960F using Tapatalk

Author:  1071 S [ Sun Dec 08, 2019 12:15 pm ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

I don't think they made units specifically for coil springs (coil springs wouldn't care how wide the lip is) ... just made without any real understanding of what is required.

I have several "artisan" sets that differ quite considerably from a Rippspeed set I also have. Can't remember how much difference (if any) there is between the Rippspeed units and the original struts.

Cheers, Ian

Author:  mickmini [ Sat Dec 14, 2019 10:37 am ]
Post subject:  Re: Difference between coil spring trumpets and cone trumpet

Not so much on another forum, but in many topics interspersed through Ausmini. Search is your friend. See below for a few choice hits from Matt :D

TheMiniMan wrote:
The shape & diameter & radius of the suspension trumpet (or hi-lo) directly effects the spring rate of the rubber donut

so ,,, yes the trumpet or hi-lo "CAN" make your car stiffer or softer depending on the shape/radius/diameter of the trumpet/hi-lo

the soft-road coil springs are probably the softest ride you will get tho... but you will sacrifice the handling/cornering because of it

if your back is as bad as mine (or worse) then get good quality seats & soft road coil springs ,,,

or otherwise you can use small diameter, sharp radii hi-los---> (similar result)
http://www.ausmini.com/forums/viewtopic.php?f=2&t=81086&p=903339&hilit=trumpet#p903339

TheMiniMan wrote:
andyinparadise wrote:
Went for a drive through the Gold Coast Hinterland, ending up at the Tumbulgum Pub for lunch today.

With the family (myself and 3 passengers) not only is the ride pretty rough but the clearance beween the top of the rear wheels and the wheel arch is less than a centimetre. The ride is really hard and it certainly rattles your teeth.
Every little bump scrapes the rear tyres on the inside of the arch.

I know I have just described a typical Mini with 4 up!

I currently have Hi-Lo's only on the front and I would say the original cones all round.

Was thinking about adding Hi-Lo's to the rear and coil springs front and back.

What are your thoughts?

My ultimate setup is to be able to go for a drive with the family every weekend without the above problems.


ok Andy,,, if you`re serious about makjing it like you say then the way i would go is,,, find some decent 2nd hand donuts,,, not squished,,, not sagged,,, not sunken & rock hard,,,, But not New either... something nice condision,,, alreradys easoned but without being 45 years old & stuffed, but not brand new "springy to the moon" either

then fit those donuts with some of my own special "Soft-Foot" hi-los & a full set of KYB "Gas-adjust shocks,,, set up the ride height & "STD" spec,,, not too low,,, not to high & Bob`s your Aunty mate

you will have a lovely ride with just 2 people or 4,,, smooth & comfortable with both different loads,,, it will still handle nice because you are actually "Using" your correct amount of suspension travel, but without being almost "SOLID" like some minis are

for some reason people like rock hard, stiff suspension "Claiming" it to be "Better-Handling",,, well stutter bumping across the opposit side of the road whilst attemting to corner just isn`t my kettle of fish, nor is it my favourit way to corner a mini

minis have some 4" of suspension travel & if correctly fitted out & adjusted correctly, it will serve you well with "loaded" & "Un-loaded" conditions

the trick is in "Blend" of both the donut & the hi-lo condition/designs

Hee hee,,, "some" people on here will "Know" what i`m talking about,,, but sadly other won`t

ok,,, end of dribble,,, move along,,, nothing to see here,,, it was a private conversation & doesn`t concern you lot :-)
http://www.ausmini.com/forums/viewtopic.php?f=2&t=58188&p=755177&hilit=trumpet#p755177

TheMiniMan wrote:
This is a copy of the e-mail (PM) that i have sent to a few people already, may as well just type it here to save re-typing to everyone via individual PMs

I`ve worked on minis for a very long time & i feel i`ve sorted the hi-lo system out pretty well,,, depending on what sort of ride you like & what type of rubber donut you have to use, we can tailor the hi-los to suit your needs,,, & they`re easy to fit & adjust

My hi-Los are made from hi quality Billet Machine grade alloy, made just the right length to fit easy, with M20 thread all the way to the head of the bolt , so they can be adjusted very low to fit in without having to remove the top arm or the need for a cone compressor

I make 3 different designs, a small diameter "soft" sharp radius one for lovely smooth soft ride on the road (or to help with the use of old hard donuts),,,, i make a std radius which i call a Medium (same radius & diam as the std alloy struts)... & i make a wide diam large radius which creates a firmer/ harder ride for race cars

so mine are basically far better than the average set which are all made very large diameter (too firm) & wayyyyy tooo long (wont fit very easy)

Mine also have the drain hole to let the water out & come with the threads all pre-"copper-coated" so there`s no problem with them binding up

But,,, in saying that, i personally like to remove the top arm to effect the over-haul of the pivot bearings , check thrusts & the seat for the nylon cup etc

They`re $60 each plus postage

cheers
Matt
http://www.ausmini.com/forums/viewtopic.php?f=2&t=56620&p=671274&hilit=trumpet#p671274

cheers
michael

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