[Supras] Losing Performance

[berniek at technicaldevelop.com]

Van:


    Whoever did this work was meticulous.  Observations are as follows:


1.  The power producing externals of the engine are apparently stock 
except for a conversion to speed density or use of a GM hot wire AFM, 
given use of the stock BOV, stock unmodified FPR.  The Turbo appears to 
be a CT26, but without a bigger BOV, it has to be stock or ultimately 
will be destroyed from surge.  Looking further, absence of an ISCC would 
indicate use of a speed density system.  Also, wiring from the throttle 
position switch and sensor appears to simply end, and not connect to 
anything, although possibly a artifact of the photograph size and 
resolution.  Some temperature sensors are missing from the thermostat 
housing as well, not to mention anything about emission controls such as 
the charcoal canister.  Regarding turbo modifications, an additional BOV 
could be out of sight in this photo. 


2.  The piping is absolutely beautiful, including the canister and hoses 
for the remote mounted power steering reservoir.


3.  The engine mounts must be solid, considering use of hose for 
connections in the piping, but shunted with metal straps.  The one at 
the throttle body appears to have Heim joints to adjust the stress in 
the piping. 


4.  The FPR VSV was not used.  The VSV diaphragm is connected to a 
second tapping in the frontmost plenum vacuum fitting.  The EGR and its 
VSV may be removed as well, indicating that the steel and rubber tubing 
mess below the intake runners was probably removed as well.  The BOV 
diaphragm is connected to a second tapping in the power brake booster 
fitting. 


5.  A catch can not in view may be used instead of the stock crankcase 
ventilation provisions.


6.  The front wheels must really be decambered for good cornering, given 
the strut offset within the strut tower. 


7.  There appears to be two gussets or stiffeners between the firewall 
on the right side and the strut tower.  One is tubular and painted, 
while the other appears like a torque arm and is not painted.  There is 
also a painted tubular support  on the left side. 


8.  The car appears to be Japanese or English, as it is right hand 
drive, looking at the positions of the clutch cylinder (now the brake 
master cylinder?) and the windshield washer motor. 


9.  The exhaust manifold appears stock judging from the engine flange 
thickness and rust. 


10.  I've never seen an air cleaner setup like this before.  It appears 
to be use a squat piece of cylindrical black foam as the media, but 
looks stock at first glance. 


    Bernie

kdvanloo wrote:
> Hey Bernie,
> Here's a ref picture for your consideration during design phase. I 
> considered this route, but in the end went with a less custom and more 
> affordable LIPP alu IC pipe kit (that goes the stock route).  I took 
> my reference pic from, "Turbosupras.com".  Van
>  
>
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