10V head mod qustion

[ed armstrong]

Probably pretty minimal, although with a turbo the
gain is likely more on a percentage basis of increased
hp as compared to a normally aspirated engine. Maybe
you will see a 5 hp increase at high rpm. Perhaps
Javad has a better feel on this subject.

The point is, if your going to rebuild the head, the
40mm valves cost no more than the stock 38 mm. So the
upgrade is a no brainer. And every little increase in
hp and flow helps.

 -ed

--- Konstantin Bogach
<konstantin.bogach at morganstanley.com> wrote:
> What is estimated performance gain from 40mm intake
> valves mod?
>
> Thank you.
>
> Konstantin.
>
>
> ed armstrong wrote:
>
> > I rebuilt my MC head recently and installed bigger
> > 40mm intake valves. The head and motor are not in
> a
> > car yet but I think the upgrade can only help a
> turbo
> > motor. I don't think you can get bigger sodium
> exhaust
> > valves than stock. Even if you could there in not
> much
> > room to fit them.
> >  -ed
> >
> > --- Konstantin Bogach
> > <konstantin.bogach at morganstanley.com> wrote:
> > > I searched archives on subject of bigger valves
> but
> > > I could not find
> > > much on turbo engines. There is discussion on NA
> > > engines but not much on
> > > turbo.  So, what is general consensus on
> installing
> > > bigger intake or
> > > exhaust valves?  Is it worthy to do that on
> these
> > > cars ?
> > > Can I use not sodium filled valves in this cars?
> > > What is a downside?
> > >
> > > I have neither experience nor theoretical
> knowledge
> > > in
> > > technology/materials used in building heads.  I
> use
> > > Napoleon's tactic -
> > > engage first then see what you can do.  I
> engaged
> > > already by planning
> > > taking head off my car tomorrow.  Now... I will
> > > appreciate if someone
> > > point me to ABC of head rebuilding (if such
> write-up
> > > exists in first
> > > place).  I also need a good source for rebuld
> kit
> > > for K-26.  I called
> > > ont place - $125. Sounds like big $$$.
> > >
> > > Thank you.
> > >
> > > Konstantin Bogach.
> > > 200tq '89
> > > 200tqa '89
> > >
> > >
> > >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Find a job, post your resume.
> > http://careers.yahoo.com
>


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