Is it possible to put the tiger back into the book chassie (for sierra donor), is it much work? Or should I go for a capri axel ?

Shaggy, this is exactly what I have done/am doing, and I've heard of a couple of others. So far it has all proved pretty easy, although I've yet to make the wishbones (shouldn't be any harder than making any other wishbones) and uprights, which I anticipate being the hardest bit. I would go as far as to say that it's proabably easier than using a capri axle, because that requires what looks like fairly extensive alteration to the tunnel (just ask Mark Allanson). Also I prefer the thought of the drive shaft being static in the tunnel rather than shaking around with the suspension.

Kingr

I held off starting my build until I had my hands on the Tiger book, and then started a bookish build the next day! I dont like the rear of the tiger chassis it design (if you can call it that) is not exactly sophisticated, it has little or no triangulation and to my eyes just look wrong, the rear uprights look a nightmare to make (qualified welder/fabricator), and RC's new book looks like it may have IRS plans, probably worth hanging on a few weeks to find out.

The tranny tunnel modification are not at all hard, it took me a little head scratching to begin with, but I think they are well worth it. The purpose of the rear suspension is to have both rear wheels on the ground in a level and upright stance, a live axle does this for free. The advantage of IRS is a better ride, I intend to use 13" wheels with a moderately high profile, if I am about to loose the back end, I want the car to tell be well before. I used to drive X19's, they run 165 70 13 tyres and the ususal conversion is to go to 185 60 14's, it gives you more ultimate dry grip at the expence of wet handling ,comfort and the 'feel' of the car.

Its everyone choice!

Mark

This has already been covered, but while live axle may be great for a snooker table smooth race track, it's rather less than ideal for the roads in this country. Having one wheel lift over a bump causes the angle of the other wheel to change, losing grip on both wheels, not perfect. IRS on the other hand will quite happily go over bumps all day long, and to a large extent leave the other wheel untouched. Also, on a race track, hard cornering with a live axle will cause an angular force from the outside wheel on the entire axle resulting in even less grip on the inside wheel, and unless you've got an LSD, that means wheel spin.

With regards to the design, take a look at the rear end of the MK - not a whole boat load of triangulation there, if anything, the tiger is purer spaceframe, because the MK features bent tubes. Hell if you're that worried, you can always slap some more triangulation in there around the diff.

Kingr

Shaggy,

It's what I've done - see pics in the photo archive.

It's slightly different to Jim Dudley's plan, I've just followed the general layout.

I'm hoping to get a few more jobs done in the next fortnight, then have a week off (work) for a major final finishing/ reassembly session. So I should have lots more piccies to post.

ATB

Simon