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Re: Tuning 2500

To: Skip Gurnee <skip47@home.com>
Subject: Re: Tuning 2500
From: Dr John Upham <webmaster@ukmotorsport.com>
Date: Thu, 29 Jun 2000 00:26:35 +0100
Skip Gurnee wrote:

> 
> Hmm-forward holes for the steering rack?  In mine, it caused the
> steering arms to be angled much too far to the rear, maybe 20 degrees!
> Bump steer was minimized by moving the rack vertically, not
> horizontally.  

  This is correct: bump steer is cured by moving the rack vertically.

Could there be differences in frames???

I doubt it at least the chassis are the same for various Vixens where
the
rack mounts but there are some other wierd differences occasionaly.

Regards,

JU

> Best,
> Skip
> 
> Dr John Upham wrote:
> >
> > Skip,
> >    How much space frame twist is there with 230bhp (although the
> >    torque figure is more relevant)?
> >
> >    I'd guess most of the twist is in the middle section but a decent
> >    roll cage should stiffen it up properly. I assume you do have
> >    a roll cage rather than just a roll hoop?
> >
> >    Whilst I''ve been rebuilding my Vixen S3 I've bought an Impreza
> >    WRX which is quite amusing but not as much fun as the TVR.
> >
> >    Where do you get your BDA parts from?
> >
> >    Regards,
> >
> >    John Upham
> >
> > Skip Gurnee wrote:
> > >
> > > Steve-
> > > Dare I quote the old adage about "speed costs money how fast, etc.?  The
> > > money you spend will be somewhat dependent on your plans for the car and
> > > how long you intend to keep it.  If it's a lifelong venture like my
> > > Vixen, then do whatever you want without regard to resale value.  If you
> > > have thoughts of selling it someday, then I second Bob's vote about
> > > changing engines.  I also second Will's thoughts about other
> > > modifications required.  My car is running a 230hp Cosworth BD engine,
> > > and EVERYTHING has been changed in the suspension and drive train to
> > > support it.  The total cost is several times what you're considering.
> > > The TVR can handle 175hp, but the drive train will see a large
> > > percentage increase in stress, with consequent increase in breakage
> > > possibilities.  The mods on my car didn't come all at once; they came as
> > > a result of fixing the "next weakest link".
> > > By the way, the money and frustration are forgotten when the car stays
> > > together and you win.
> > > Best,
> > > Skip Gurnee
> > > 1970 Vixen S2  LVX14704
> > >
> > > "Hill, Stephen M EDUC:EX" wrote:
> > > >
> > > > I have been researching what can be done to warm up my stock TR6 engined
> > > > 1972 TVR, which as folks know is only 106 hp stock. I have triple 
>webers on
> > > > it, a header, and I am acquiring pieces and info to go the rest of the 
>way.
> > > > The more research I do, the more I realise how difficult and expensive 
>it
> > > > will be to get a realiable 175 hp out of it, and I am wondering if I 
>will be
> > > > happy with that amount of hp.  Perhaps I should go the Rover aluminum V8
> > > > route, or maybe a late Ford 5.0 litre mustang setup.  I figure if I dump
> > > > $3000 into the TR6 engine and am not happy with the results, I will be
> > > > pissed off. I am also starting to realise that the car would be worth 
>more
> > > > for resale with a V8 than with with a hot TR6 engine. Comments??
> > > >
> > > > Stephen
> > > > 1972 2500 TVR
> >
> >
> >
> > --
> > Dr John Upham, The UKMotorSport Index,
> > http://www.ukmotorsport.com/, webmaster@ukmotorsport.com,
> > Voice: +44 (0) 976 634 053 (W), Voice: +44 (0) 125 287 2551 (H),
> > Voice: +44 (0) 976 634 053 (M)

-- 
Dr John Upham, The UKMotorSport Index,
http://www.ukmotorsport.com/, webmaster@ukmotorsport.com,
Voice: +44 (0) 976 634 053 (W), Voice: +44 (0) 125 287 2551 (H),
Voice: +44 (0) 976 634 053 (M)



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