Can anyone tell me if the fmic is going to be of any use for my particular circumstances.I'm probably going to get the Ecutek upgrade for my STi7(in a few months),I'm not going to go as far as uprating the turbo.Would a fmic make any significant gains for me?

 

Measure the intake temps and see? The STi 7 TMIC looks quite good, and if you don't want mega BHP might be up to the job.

 

Hi John.If I were to measure intake temps how would this really help me to quantify any possible gains?

 

My guess is that if the temp is already pushing the limits, then go fmic, if the temp is way low, don't bother!

 

That was what I was thinking too.

The problem with tuning with top mounts for high power/high boost is getting a healthy consistent ignition timing. With an appropriate intercooler you can find the det threshold and then pull it back for your safety margin and you don't tend to get surprises so much. With a TMIC you have to be more conservative with the timing. Some ECUs (eg GEMS) do allow you to adjust timing by charge temperature (nice feature).

 

Any idea if anyone has already measured these temps on the STi7?

 

Got a gauge going in shortly Deep (just gotta get round to it )

Matt

 

What boost are the standard STi7's running then? JDM and UK any different? I am interested in say 4000, 6000, 8000 RPM held boost.

 

Matt please let me know when you've measured them.
John,which gear?

 

5th or 6th? Just heard various info, and the ones I have logged so far have either been in lower gears on a very tight track or modified. I gather as standard it is pretty amazingly peaky?

 

Peaks of 1.2 bar before a decat, 1.3 bar after. As soon as this is brought under control it starts tapering off, around 1 bar held dropping to .9 by 6k - because the peak is so high, it makes it look as if there is no held boost...just a peak followed by roll-off

Should make remapping it 'interesting'

Richard

 

John,

YHM m8 Sorry I'm feeling lazy so can't be bothered to post the results here of the logs I sent you, but you always could....

Matt

 

Deep: The throttle body temps want to be as close to ambient as possible. I think your car will have an outside temp guage but if not such a thing is available from Halfords.To measure throttle body temps I installed a probe into a stainless tube coupler between the TMIC and throttle body but an other option is to tap the probe into the TMIC exit pipe.
SPA supplied my guage which also does boost (digitally). There are cheaper temp guage alternatives.
With my FMIC temps up to 4k rpm are not usually more than amb + 2c and amb max + 12 on rollers or track. TMIC could go to actual temps even on cool days of 50-60c on STi 6 Wagon.
Have no experience of STi7 but believe an up-rated TMIC is NOT a viable option.
Hope this is helpful.

 

Hi Harvey.I d'ont think the STi7 can be much better as the intercooler is only about 15% bigger.Do you still have that fmic for sale?

 

John,

I have a DD log from a completely std. STi7, WOT from 2.000 RPM to redline in 5th gear. I E-mail it to you if I am in the office tomorow.

Mark.

 

Thanks Matt and Mark. Seems like a very clever ECU.

 

EMS can you email it to me as well please

raymondsimpson@usa.net

Cheers,
Ray

 

Hi Deep:Have an APS FMIC for M/Y 01 if you want to go that way but I would want to get before figures to ensure it was necessary (which it probably is if you have more than minor mods) and then be able to take after temps. At the very least you will know it was money well spent.
I would be very interested in temperatures for the STi7 top mount back to back with an uprated top mount. I will be surprised if there is much difference in the top mounts as the STi7 is very efficient already.

 

Deep , Its not only the difference in size of the I/C of the 6 vs 7 Sti's but also the tilt angle and height that effects cooloing . Here this helps air flow over the I/C that aids cooling . The Sti6 guys put spacers to raise the I/C but Subaru have included this "mod" in the 7 . I must say the power is very reliable in my 7 , not getting soak like the MY00 when pulling off from a stop . Drive your car and then stop , open bonnet and feel the I/C , you will be amazed how COLD it feels , even on hot days .
I am also planning the EBC route so I can increase response of the turbo (effectively smaller restrictor) and then limit spikes with EBC . Damn thats gonna be fun .......

Ray

 

Check out :

http://www.users.bigpond.net.au/msgofast/ictiltkit.html

to see what I mean .

Ray

 

Deep, FWIW:

I have a Defi Water Temp gauge hooked up to read intercooler temp. The intercooler is tapped just before the exit to the throttle body, and the Water Temp gauge is stuck in here. As far as temp readings go, its not too responsive as it is fairly large and intended to read *water* instead of air temp. But assuming the steady state readings are accurate...

With outside temp of 30degC, I can get an intercooler temp of 35degC. With outside @ 25degC (rare in Singapore), I may get intercooler just above 30degC. With outside at 35degC, the intercooler is just pushing 40degC.

These temps are taken when the water spray is used (ambient tap water temps) and at a steady highway cruise approx 100kmh.

If I blast the car on the road, the temps hardly go any higher. I have not tried on the track yet. But I doubt that you can really get TMIC heat soak issues *on the road* unless you very seriously break the law.

Hope this helps.



PS Oh, and never blast the car after parking it for half an hour. The TMIC can hit 80degC! Give it at least 5mins at >60kmh to cool down.

 

Harvey,thanks for the reply.I'll mail you if I finally go that way.Unforunately I'm a little lazy and cack handed so was hoping another STi7 owner would have already done the temp measuring!
Mr Botha,interesting link.It says up to a 8 degrees drop was seen compared to the STi6, do you think this means on cruise or from hot stationary?