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PostPosted: Sun Jan 22, 2012 12:21 pm 
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Joined: Wed May 18, 2011 3:16 pm
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Location: Austria
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does anyone know if the st205 engine loom work with the ST185 head/engine ????
or what have i to change???

ECU from ST205 that all work - Mines or Apexi/Haltech
throw the Air meter out - because of the MAP sensor
the intercooler from the ST205 - i have it already in stock

what else???


why i want to do this: i want to do a complete engine rebuild with a Garrett GT3071R twin scroll, for such an big turbo i need an MAP sensor. thats all ;)


greets
Thomas


Last edited by Blue Dragon on Sun Jan 22, 2012 1:08 pm, edited 1 time in total.

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PostPosted: Sun Jan 22, 2012 1:01 pm 
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Hi,

ich werde englisch scheiben, da das hier die gängige sprache ist :)

i think it makes no sense to use the stock ecu with such a big turbo, and his total different flow chart

better you go with a greedy e-manage ultimage (which you can run with a map sensor) or more better a stand alone ECU

greetz

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PostPosted: Sun Jan 22, 2012 1:32 pm 
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185 head doesn't have the intake temp sensor but it is quite common to fit one in place of the 5th injector.
The other sensors are compatible but most have different plugs. Either swap plugs or sensors.
185 has smaller injectors. 205 ones will fit.
I would leave the tvis open or better still replace with a heat insulating one. Tvis alters the ve of the engine so isn't very compatible with a map sensor fueling.
The 185 head will have a different ve so you will probably find fueling is out with a standard ecu. Better to use a programmable one.

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PostPosted: Sun Jan 22, 2012 2:23 pm 
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thanks Nibbles,

when the whole engine will be rebuilde the other things should´t be the problem :wink:
the tvis...i don´t know what to do with it, leave it or cut it out :?:
the injectors will be exchanged against 800ers sard/denso


I drive mostly mountain roads so the torque is important for me and not the maximum HP :twisted:


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PostPosted: Sun Jan 22, 2012 3:11 pm 
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You will need to run a piggy-back or standalone ecu to control the fuelling.
SARD, MINES, Blitz plug-in ecus will not work (on their own).
Emanage (Blue or Ultimate), HKS EVC or similar piggy-back ecu would be good and work as required.
MOTEC, Haltech, or similar standalone ecu would be best and give you better options in the future.

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PostPosted: Sun Jan 22, 2012 3:24 pm 
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Hi,

eliminate T-VIS against individual throttle bodys :twisted: :lol:

greetz

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PostPosted: Sun Jan 22, 2012 9:45 pm 
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TVIS should in theory provide more low end torque however I'm not sure the gains would be worth the effort & research needed.

The way I would go about running TVIS would be to drive the solenoid with a spare programmable output which would switch on below a fixed RPM - this would need to be determined on a dyno as the point at which TVIS goes from providing a gain at lower RPM to a loss at higher RPM. At this point, switching would not cause a discontinuity in engine VE so shouldn't cause a noticable error in mapping.

The possible pitfalls are firstly, the ideal RPM changeover may vary according to throttle opening or boost, secondly if the TVIS fails to operate (it relies on stored vacuum) you will have a mapping error which could cause problems.

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