Recent content by davidfawcett

Hi Brian, Thanks for the info. Cheers, Dave

Hi, does anyone recall the spring rates for the original factory GTD springs (red springs with yellow Spax shocks)? Cheers, Dave

Howard that makes a lot of sense regarding toe change, and thanks for the book recommendations. Trevor, yes the difference between a measurement, (in inch/mm), at the wheel and at the tyre could be significant.....especially with say 15" diameter wheels and high profile tyres! Would be much...

I knew I should have stuck to building engines......suspension is way more complicated!!! However, digesting your comments and those of Fred Puhn is certainly helping:) Howard, sorry perhaps I'm being dense!...on the front are you saying adding toe-in at full compression is bad and I should be...

Apologies......keep thinking of more questions!!! Howard, you mention a ride height of 4"F / 4.5"R, where is this measured on the car?

Forgot to mention......my suspension is stock GTD with the exception of the top transverse link which is as Howard's! One thing I have noticed is that with the stock front top A arm, I can only achieve a maximum caster of around 4 degs (all the way back in the bracket). Do I really need to be...

Thanks Trevor and Howard, great info. When measuring bump steer I guess I disconnect the coil over and sway bar for each wheel in turn, and on the front I realise that I'm aiming for the minimum bump steer but if I have a choice of a small amount of toe-in, or toe-out on bump, is one better than...

Thanks guys for your input. I've decided to make a bump steer gauge, which looks straightforward enough, and take measurements whilst shimming the rack and recording the results. What should I be aiming for....I'm guessing the least amount of bump steer, but ideally toe-in or toe-out on bump or...

HI All, I have read on this forum that raising the GTD steering rack by 7/16" eliminates (most) of the car's bump steer. Also that the factory apparently adopted this 'fix' at some time, but I'm not sure when exactly. My car is 1989 vintage! Was the factory fix simply to put spacers under the...

Hi Frank, was wondering why you asked about the bell housing.....is it possible to modify it to gain some chassis clearance? Thanks Dave

Hi Brian, thanks for that, it might give me a bit more clearance under the bell housing - I'll check the car and see. Hi Frank, pretty sure it's a Renault 30 bell housing mated to the 21 turbo box - as I said if I can manage to eke out 25-30mm I'd be happy:)

Nice thought Graham, cheers. Lowering the engine isn't the problem, it's getting the gearbox lower by a similar amount, (so that the engine remains level), is the real pain! Clearly the chassis brace under the bell housing needs to be modified and I'm hoping for some clues as to how to go about...

Cheers everyone for the replies...... Mike, a small insulating spacer might do the trick but I still only have room for 'tiny' valve cover breathers and would also like the benefit of a lower CoG. Hi Brian, hope you're all well. We already did that....remember! Roy Smart engine mounts and small...

Hi all I've just been reading with interest all the various options on lowering the engine in a GTD.... inverting gearboxes/Southern GT rear end/angle grinder to GTD chassis etc etc. The chassis is completely standard GTD and I'd like to lower the engine/gearbox by a modest amount c.30mm or...

Aha....got it! hybrid direct/bell crank system....you should patent that! As you say, lots of options to think about. Really appreciate all your help and will start mocking things up to decide which way to go. Thanks for the link to the cable co. will check it out. Cheers,Dave