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[lozzzzzz]

I'd like to live that close, it was over 2 hours for me



Finally found the loose screw in the camera and got it working again

Here are the pics










There we have it, my arse whooping

[Shackeng]

Bloody good try though Lozz, well done.

[tunnie]

Good stuff, sounds great too 

[omega3000]

Can you still buy those side exit pipes like those on the capri .... ?

[lozzzzzz]

Thanks guys   It was a lot of fun

I think he ordered the side exits from America, summit racing if I remember correct.  I'm sure they could be found again, I'm not sure they're what I'd like on my car really, they're a bit of a pain over speed bumps and I like mine being usable really.  They do look awesome on a fresh morning when following him, a ploom out of each side when he pulls away from a junction

[aaronjb]

Nice pictures!

Don't take this the wrong way but you look about 20 years younger than I expected..

Custom Chrome in the UK could produce sidepipes like that, or Summit in the US (amongst others, I imagine) but as you say, without serious 'relieving' of the floorpan would probably be a nightmare over every speed hump!

[ozzycat]

an exelant time had by the pair of you dosent mater that he wooped your arse as long as you enjoyed the day i wana go!!!!

[noel]

The smile on your faces says it all,its the fun of having a go is what its all about   hats too you 

[lozzzzzz]

Thanks guys   It was a lot of fun, I'd definitely go again.  I look even younger without the beard (about 12 )

I'm fighting the temptation to put laughing gas in it, but I've got to keep in mind my car is far more useable and far more economical, but I'm not keen on being beaten.

[Rods2]

Thanks guys   It was a lot of fun, I'd definitely go again.  I look even younger without the beard (about 12 )

I'm fighting the temptation to put laughing gas in it, but I've got to keep in mind my car is far more useable and far more economical, but I'm not keen on being beaten.

Unfortunately, however fast you are there is always somebody faster, like this Vauxhall owner. 

http://www.youtube.com/watch?v=APPiHk8CaNg

[symes]

ah red victor three-worlds most powerful street car mad as a box of frogs

[lozzzzzz]

Hmmm, I think that would take some beating! 

I'm still fighting with it, to be honest, I might be a little scared of it, especially as I'd need a 100hp of Nitrous to safely beat the capri.  I think that might munch the engine pretty quickly.

[lozzzzzz]

A long overdue update. 

I've done pretty much half my annual mileage in the car already!!!   And the exhaust is doing my head in, Its not leaving the garage again till this is done!  I'll be fitting a 1/4 wavelength resonator pipe to each side, with a sliding joint so it can be tuned to the right frequency then depending on the how that is I'm still thinking about pursuing the intercom route. 

The other thing is bump steer, hands up who saw that coming after my new wishbones and uprights

Well I knew there was an issue from the start, you simply can't make a ball joint conversion without there being one.  In a ball joint the steering axis and the axis through the end of the wishbone coincide and they do not in the trunion so I knew I would have to lengthen the track rods to take this into account.  I've done all the calcs for this and found they need to be about 6mm longer each side.  This is easily done with the steering arms being bolted to the uprights with great big spacers, simply turn the spacers down a bit

But what I hadn't though about was that I've make the upright about 45mm taller!!!!!  The end of wishbone axis sits 45mm lower than in the original set up, compared to the top ball joint!  This makes the 6mm track rod problem look like nothing.  You can see this extra height in the following photos. 




So after much calculating and trig and so on.....  (and the race and rally source book, which is excellent for this sort of thing)


My options are......

*Raise the rack by 16mm and move it back by 3mm and extend the track arms by 6mm
*Lower the track rod ends by 20mm and extend the track arms by 6mm
*shorten the uprights by as close to 45mm as possible and extend the track arms by 6mm

My thinking is, instead of getting further into trouble, I'll take the option that gets the suspension close to the original and choose option 3. 

More to come..

[symes]

Well now you getting there mate-and welcome to my world-do one thing-alter 3 more But reckon you correct in option 3-as you put it.. At least you not dealing with rover p6 suspension(alters camber on travel)  I found that to make mine quieter inside-fit thicker carpet-it helps

[lozzzzzz]

This afternoon has been an education.  I'd done a lot of reading and trig to figure out what I needed to change about the suspension to get rid of the bump steer.  I did it all on one side only so I could test both and see the results.  The results from the left and right sides both looked the same

I was just raising the suspension and watching it though, so I devised a more accurate way of measuring the bump steer.  I used the laser from my tracking kit and attached it to the upright in various ways and marked off the path it followed through the suspension travel.  I made sure the laser was always pointing perpendicular to the side of the car no matter what the steering angle was and put the target the same distance away each time etc. 

I've been messing about with it for hours and have finally figure out what is actually causing it to bump steer.  I've lengthened the track arms by 6mm, not a bit of difference.  shortened the upright from pivot to pivot by 45mm down to the normal 290mm ish, not a bit of difference, still lots of bump steer.  I sat looking at it for hours then thought about adjusting the caster angle, that made a big difference and I managed to get the staight line you see in the last photo on the right. 




So it seems the issue of bump steer is very sensitve to changes in caster (resulting in changes in the height of the track rod end relative to the rack), and not very sensative to track arm length. 

There is still lots to do in deciding the best place for everything, but I feel like I'm making a bit opf progress and might actually solve it now. 

More to come