Front Uprights - Cortina 3/4/5 v Sierra
Discussion
JontyR said:
How about triumph? Better geometry than both
Only one thing to say to that suggestion...TRUNIONS!!
Can't really trust a component that will be too tight or too loose, depending on where you have the steering wheel at. I suppose it would be more or less right at some point in the travel....if one was lucky. I never could understand why that thread was tapered, since you had no real choice where to set it, other than one turn either way. Anyone??
Had one snap on a Mantula I used to own - the end of the thread cut for the trunion had a nasty stress raiser in it and it fatigued (and no, it wasn't siezed up!). Part of the problem of putting a suspension part designed for less than a ton, skinny tyres and a weedy engine into something with a V8, more weight and a tad more grip. Converted it to Cortina uprights and while I was at it, got rid of the comedy bump steer it had from the 'factory'.
Marcos hadn't managed to accurately copy the Triumph setup so it had bump steer so bad you couldn't go round a corner in anything approaching a smooth curve.
Edited by CorseChris on Tuesday 29th January 13:00
Fastpedeller said:
I think there are some nice light alloy ones (Cortina copies?) available if you have the ££££s
Are you talking about these from Siltech RacingCorseChris said:
Only one thing to say to that suggestion...
TRUNIONS!!
Can't really trust a component that will be too tight or too loose, depending on where you have the steering wheel at. I suppose it would be more or less right at some point in the travel....if one was lucky. I never could understand why that thread was tapered, since you had no real choice where to set it, other than one turn either way. Anyone??
Had one snap on a Mantula I used to own - the end of the thread cut for the trunion had a nasty stress raiser in it and it fatigued (and no, it wasn't siezed up!). Part of the problem of putting a suspension part designed for less than a ton, skinny tyres and a weedy engine into something with a V8, more weight and a tad more grip. Converted it to Cortina uprights and while I was at it, got rid of the comedy bump steer it had from the 'factory'.
Marcos hadn't managed to accurately copy the Triumph setup so it had bump steer so bad you couldn't go round a corner in anything approaching a smooth curve.
Ah yes...the good old Trunions. The new versions of the old version...does that make sense? lol... no longer have these, so they are safe again!TRUNIONS!!
Can't really trust a component that will be too tight or too loose, depending on where you have the steering wheel at. I suppose it would be more or less right at some point in the travel....if one was lucky. I never could understand why that thread was tapered, since you had no real choice where to set it, other than one turn either way. Anyone??
Had one snap on a Mantula I used to own - the end of the thread cut for the trunion had a nasty stress raiser in it and it fatigued (and no, it wasn't siezed up!). Part of the problem of putting a suspension part designed for less than a ton, skinny tyres and a weedy engine into something with a V8, more weight and a tad more grip. Converted it to Cortina uprights and while I was at it, got rid of the comedy bump steer it had from the 'factory'.
Marcos hadn't managed to accurately copy the Triumph setup so it had bump steer so bad you couldn't go round a corner in anything approaching a smooth curve.
Edited by CorseChris on Tuesday 29th January 13:00
Personally I think the uprights are far better for bump steer than the Cortina version. Using them on our own car now.
Not too expensive either. If you want to contact me I can get a price for you. they come complete with rotors, callipers the lot.
It took some work to get rid of the bump steer - new longer wishbones, shorter rack/longer arms and converting to a spehrical bearing rather than a balljoint for the TRE so I could shim it up as needed. Got it down to damn near zero across the entire travel in the end. Big improvement over the OEM setup. That, and converting the rear 5 link-with-built-in-bumpsteer back end to a cut-down Jaguar IRS.
The alternative on that car was to relocate the lower wishbone pickups about 1 1/2" below the chassis....not an option I fancied, although it had been done. Or a centre take-off rack was another way to mask it quite well.
So, there are Triumph uprights with a BJ top & bottom then? Interesting, but only academic for me - I'm happy enough with the Cortina bits on the Westy, and shan't be building any more cars in this life. Perhaps the next, but who knows.
The alternative on that car was to relocate the lower wishbone pickups about 1 1/2" below the chassis....not an option I fancied, although it had been done. Or a centre take-off rack was another way to mask it quite well.
So, there are Triumph uprights with a BJ top & bottom then? Interesting, but only academic for me - I'm happy enough with the Cortina bits on the Westy, and shan't be building any more cars in this life. Perhaps the next, but who knows.
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