My 1500's 7.5:1 compression ratio will help with that
problem. Proper mapping of the air fuel ratio and
spark timing in the engine management system, along
with a knock sensor ought to address knock.
There are turbo Civics running 10:1 compression and 20
lbs of boost on the street. The precise control of
electronic engine management makes it possible.
But it can take a lot of testing and tuning to get
things set up right. And mistakes can eat motors.
Truthfully, I do not know yet. I will use the lowest
octane that runs properly. Adaptive ECU and knock
sensors *should* allow 87 octane, though maybe at
reduced power and driveability.
I'm not looking for outright horsepower, I want to
substantially fatten up the stock torque curve in the
midrange.
To misquote,
'Horsepower sells cars, torque wins races'
Carter
--- Ken C <sdspitfire@worldnet.att.net> wrote:
>
> Carter,
>
> What type of gasoline do you intend to use to avoid
> detonation ? Are you
> planning on using additives ? I may need a mild
> octane boost, any
> suggestions ?
>
> Way back in 1979 when I moved to socal, I brought a
> '79 Turbo Mustang and
> had problems with detonation, nasty problem. I do
> not want a problem with
> the Spit.
>
> Ken C
> '72 Spit
>
> >
> > For reliability, prepping the crank, rods,
> bearings
> > etc. to comp manual specs will help. Limiting the
> RPM
> > will help a bunch, with a well matched turbo you
> > should not need to use high RPM. But there are
> other
> > issues, head gaskets, cooling, detonation.
>
>
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