There are three problems that have caused this, I think. The first is the insane amount of power available - around 250bhp, though I believe some of the Ford turbos are around that figure - which is guaranteed both to distort tyre shapes and to lift the front end under boost. The tyres are wider and deeper than the originals and the offset is greater, too, which doesn't help.
The second is that the Fiat engine is quite wide and I was not able to centralise it between the wheels. While it does have an idle shaft from the diff to the right of the engine, so that on the original car the shafts are equal length, on this car it is offset an inch or so to the left - and that means the left drive shaft is about ten inches long against twelve on the driver's side, with all the geometry changes that implies. The third is that on both sides of the car, so much of the engine frame was changed to fit the engine *in* that even though we thoroughly braced it before we cut and rebuilt, it's surprising really that it's not half an inch out. We didn't change the suspension tower pickups nor the wishbone inboard ends (curiously, they were half an inch different relative to the bulkhead but I don't know whether this was by original ford design), but on both sides we had to reposition the tie bar pickups and use a blacksmith's forge to reshape the tiebars so everything fitted together again! The tyres are Yokos - can't recall the version - in 15/185/55 size. Neil On Saturday, May 11, 2013 11:48:59 PM UTC+1, trackerjack wrote: > > Very interesting mine improved tremendously when I changed from Yokohama > 309's (very square) to a more forgiving Uniroyal Rainsport 2 and today I > was booting it in the wet with no problem out of roundabouts etc.Finicky > things motor cars. > > ----- Original Message ----- > *From:* barnacle <javascript:> > *To:* [email protected] <javascript:> > *Sent:* Saturday, May 11, 2013 9:43 PM > *Subject:* [Quantum Owners] Torque steer control by camber angle change > > I may have mentioned that the Fiat 20vt Quanturbo that I built in a fit of > insanity has some pretty vicious torque steer - exceed 3000rpm in first or > second gear and you're heading for the ditch, and overtaking in third is a > risky enterprise because when you change up the steering wheel is pointing > in the wrong direction and so therefore heading for the *other* ditch. > > Today I got an MOT (sailed through) and while checking over the car fitted > a camber control bolt (well, two, as I had two, but the driver's side is > set as original). With the top of the passenger side hub carrier moved > inwards by less than half a millimeter - I calculate that as somewhat under > a degree less camber than originally present - the thing has turned into a > pussycat. > > There is still torque steer - but mostly squirming and occurring much > further up the rev (and therefore torque) range. In third or higher it > barely twitches - and third goes to 98mph, very very quickly... > > I'm finding it hard to believe that the resolution of this problem has > been so simple. > > Neil > > -- > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to [email protected]<javascript:> > To unsubscribe from this group, send email to > [email protected] <javascript:> > For more options, visit this group at > http://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As > Is" basis, without warranty or the implication thereof. Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or > in the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or > alleged to be caused directly or indirectly by the instructions contained > within this or related message(s). > --- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/groups/opt_out. > > > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2013.0.2904 / Virus Database: 3162/6306 - Release Date: 05/07/13 > > -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
