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Re: Specific SR20 stuff

To: milton3 <milton3@pobox.com>
Subject: Re: Specific SR20 stuff
From: Thomas - Sweden <csp311@telia.com>
Date: Fri, 24 Jan 2003 09:26:03 +0100
Why not us the M3 S14 engine in another swap too?
It's not heavy and probably not expensive as some
think it is.

Thomas

milton3 wrote:

> James,
>
> Yeah, I know it's not that simple.  Gotta have more like 7 or 8
> connections into the harness.  Really, that's all you need and several of
> those are just to feed the guages.
>
> I've installed an M3 motor into a 70s 2002 using the factory computer
> without problems.  And, I'm hoping to advantage some of the stuff I
> learned doing that swap.
>
> But, my reason for choosing the SR is the simplicity.  I think the factory
> did plenty well enough tuning the motor and I'm sure it isn't hard to
> reprogram the thing if I change my perspective.
>
> Yeah, I built a custom CR tranny for that M2002, but it was a race car
> (AutoX).  The roadster is a street cruiser with emphasis on reliability and
> comfort.  Add cost to round out my list of design priorities.  The car was
> wicked fast with the U20, and I get to pick up a little power in the mix.  I
> will be smiling.
>
> But, using the factory computer is miles easier and less expensive than
> using an aftermarket controller.  I don't have to spend days or weeks
> programming fuel maps, etc.  And, I really don't sacrafice much power.
> Seriously, to effectively top factory tuning requires days of dyno/gas
> analyzer time I couldn't even start to afford, and the improvements would
> be marginal.  If I get bored, a SR20DET swap will be less than $3k
> away, and I bet I could recover much of the SR20DE investment to help
> with expenses.
>
> And, regarding the speed limiter - what do you suspect happens if there
> is no speed signal?  I'm guessing there is no limiter. Since speed is not
> a fuel map input either no signal or constant signal will trick the
> computer so that it doesn't worry about speed.   All I believe I need is a
> $20 part to drive the speedo cable.
>
> But we shall see, and I promise to share my results with the list.  My
> motor SR20DE/5sp gets here Saturday.  And, surprise, surprise I'm
> also pulling the U20/5sp on Saturday.  I'm being pretty aggressive, but
> I'm betting that by this time next month ...  I won't be wheeling a gas
> guzzling F150 <hopefully>.
>
> You might guess that I'm a wee bit excited - you would be correct.  This
> has been burning me since the U20 quit in october, so it feels good to
> finally make some progress.
>
> Milton

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