Bump Steer mod - anything I should know?

[bc_suv]

Hi All,

Next weekend I shall be lifting the engine out of the car prior to putting it in the skip (engine not the car!).

This would be the perfect time to shorten the steering column tubes from 110mm to 103mm whilst there is no engine in the car. Apart from trying to reuse the off cuts as spacers under the lower nuts, is there anything else I need to know before I do this?

Alternately, is it worth waiting to do this untill after SVA so I know how the car handles from stock?

Regards,

Brian

[sumoboy]

Hi Brian,

If my memory is correct it is 102mm not 103mm, so cut off 8mm

When you lower the steering rack the lower steering column uj might just touch the chassis upright, if so make a small dent in the upright so there is no contact.

Also when you lower the steering rack the tracking will be out, so check this and mine car then needed the top wish bones moved back a little, as it would not self-centre

Also check that the steering rack does not crush the lower water pipe.

Sounds a lot but it is worth the effort

Dave.F.

[Sidecarbod]

Originally Posted by bc_suv

Hi All,

Next weekend I shall be lifting the engine out of the car prior to putting it in the skip (engine not the car!).

This would be the perfect time to shorten the steering column tubes from 110mm to 103mm whilst there is no engine in the car. Apart from trying to reuse the off cuts as spacers under the lower nuts, is there anything else I need to know before I do this?

Alternately, is it worth waiting to do this untill after SVA so I know how the car handles from stock?

Regards,

Brian

The measurement that I used to give out was 102mm. 1mm seems a trivial amount but believe me it makes a difference.

Infact when Noel and I did his car I used my improved measuring methods, (lasers) rather then ali bars which is what I did when I did my car ages ago. I have now found that is still a small amount of bumpsteer with the 102mm posts. (5 times less than 110mm though!).

If I was you I'd cut them to 100mm. You will have to put a small dent in the chassis upright so that the UJ and the pinch bolts miss but its not an issue.

We also setup Noels camber to be vertical on full droop then wound out each top ball joint another 3 turns. On reflection 4 maybe slighly better. (You may not be able to do this, it depends on what mushrooms you have as to whether you will have enough spare thread on the balljoint)

All of the above will totally and completely mess up the tow so don't even think of driving it until that's sorted out. Once it is you won't be able to get the smile off your face!

Pete

[Sidecarbod]

Just thought I'd better qualify my 100mm statement!

Basically it is a bit of a guess but at the end of the day you could cut them down to 100mm and then stick a couple of 1mm washers between the rack and each post. If I, or someone who has the equipment to measure the bumpsteer then finds out that 100mm is the figure you'll be "quids in". Having said all that 102 or 100 is a 5hit load better than 110mm. (I'd go for 100mm if I was you) Noel's are at 101mm but that is due to his unique hack sawing skills!

Pete

[Noel]

Originally Posted by Sidecarbod

Just thought I'd better qualify my 100mm statement!

Basically it is a bit of a guess but at the end of the day you could cut them down to 100mm and then stick a couple of 1mm washers between the rack and each post. If I, or someone who has the equipment to measure the bumpsteer then finds out that 100mm is the figure you'll be "quids in". Having said all that 102 or 100 is a 5hit load better than 110mm. (I'd go for 100mm if I was you) Noel's are at 101mm but that is due to his unique hack sawing skills!

Pete

Yeah but if I was even more cack handed the bumpsteer might be completely eliminated rather than the miniscule amount that is left

(For those who weren't there, with 101mm posts there is fraction of bumpsteer remaining, which is still probably better than most cars on the road)

[Sidecarbod]

Originally Posted by bc_suv

Alternately, is it worth waiting to do this untill after SVA so I know how the car handles from stock?

Regards,

Brian

I would not wait until after the SVA, I can tell you how it will handle....5hit! (I don't care what anybody says about their Pilgrim handling well, IMHO they don't as they come from the factory).

I don't think that Noel will mind me saying that he was quite a doubter on this subject and he was pretty well "blown away" by the difference.

The other issue is the self centering, you should do the wishbone mod as some cars basically won't get through the SVA without this mod.

When your engine is out is the ideal time to get it all done.

Regards,

Pete


Why are their two threads running on the same subject?

[Noel]

Agree, these are all VERY simple mods to do during the build, just a little more awkward on a built car.

[jeff]

qoute "I don't care what anybody says about their Pilgrim handling well, "

who the feck said that LOL

Sumo's in standard form handle like a slidey thing on slidey road covered in extra slidey stuff

and No I havent sorted mine yet, its better than it was but I still need to do the bump steer mods.

I am hoping to sort next weekend I will let you all know how it pans out, It would be nice to feel in control at 100 plus (Petes private road of course)

[Sidecarbod]

[quote=jeff;249092]qoute "I don't care what anybody says about their Pilgrim handling well, "
quote]




Jeff, I was just prempting any flying "buns"

Pete

[alfiebeard]

Originally Posted by jeff

qoute "I don't care what anybody says about their Pilgrim handling well, "

who the feck said that LOL

Sumo's in standard form handle like a slidey thing on slidey road covered in extra slidey stuff

and No I havent sorted mine yet, its better than it was but I still need to do the bump steer mods.

I am hoping to sort next weekend I will let you all know how it pans out, It would be nice to feel in control at 100 plus (Petes private road of course)

Hi Jeff,
I totally agree with you about a standard Pilgrims lack of handling ie puppy on a lead springs to mind, BUT have you driven a pilgrim MK111 with Jag running gear, NO, well try one they handle spot on right upto 130mph and beyond if your private road allows.
Am I the only one with Jaguar running gear???.

Alfie B