1.8t in 4kq

[Dave Alarie]

ScottyCBoy at aol.com wrote:

>--
>[ Picked text/plain from multipart/alternative ]
>In a message dated 5/15/2002 5:32:44 PM Central Daylight Time,
>auditude at get.net writes:
>
>
>>Hmm.  How about a Coupe GT with a 1.8t?
>>
>>Maybe just a longblock, and something like SDS efi to run it?
>>
>>A step backwards from Motronic?
>>
>>Ken
>>
>
>I'd argue that the strong point to the 1.8t is not the engine its self but
>the electronics. You'd be taking several steps backwards using a different
>EFI.
>
>Scott
>
I agree.  CIS-E is elegant and robust and those strengths are
attributable in large measure to it's simplicity.  The opportunities
presented by the motronic system are compelling, e.g., the software is
mutable, a quality largely absent in the mechanical CIS-E system.
    <IMHO>, The primary adavantage to transplanting an otherwise
un-modified 1.8T rig into a 4kSQ or Coupe is the immediate remediation
of the weight distribution handicap of these platforms.</IMHO>
    As I understand it - please correct the numbers as necessry
gentlepersons, weight distribution in the 4K is 58/42 on a 2890lb
vehicle.  Thats 1676/1224 in lbs, front/rear..   If a new engine package
weighs, say 87lbs (3%), less than the old package, then the numbers look
like this:  2803lb vehicle weight, 1589/1224 and 56.7/43.3.
    Oh, but I also moved that steamin' hunk of burnin' funk battery to
the rear; to the trunk.  Using 33lbs for the battery weight the numbers
look like this: 1556/1257 and 55.5/44.5.
    The speculative engine weight savings makes for 87 fewer pounds
_ahead of the front drive axles_ that doesn't need to be swung to a new
heading during turns.  That makes for a quicker front end and less
tendency to plow.
    The only other means of significantly affecting handling by changing
mass and weight dynamics is to lighten the reciprocating weight at the
wheels:  lighter calipers, lighter discs, lighter wheels, lighter tires,
helium balloons.
    Anyway, I think "just" swapping in an otherwise un-modified 1.8T
package offers meaningful advantages to 1) handling and b) power to
weight ratio.

Well said by David Ullrich:

>But, that's not really the point, the guy wanted to know whether it can be done, not whether we like the 1.8T better than a 20VT, so let's get this thread back on track...
>
    What about the idea of swapping in the motronic system ahead of the
engine?   Rip out the CIS-E bits and then bolt-on a newer throttle body,
upgrade the injectors, and install the motronic fuel distibutor, MAF and
ECU.  Then it's just (look, he said "just" again.  ha ha ha ) a matter
of programming the motronic unit to spoof  the CIS-E fuel mappings.


--
thanksOkayBye
Dave