hrubago

Have 2,5 conversion (USDM Sti short engine + TD05/06 20G turbo, FMIC, HAltech engine management + sti3 heads, PE exhaust + ehaust manifold) in my wagon (which has previously converted into Type R specification :-)
Engine has good torque and bhp but the problem is:
short gearing + narrow rev. range where the torque and power is interesting for me. Both starting to fall down before 5500.
Result is: I have to switch gears very quickly. Maybe longer gearing will be the solution, but i really need rising power curve till 6500-7000 revs.
I dont know if I have wrong maps or the hardware (turbo, cam profile etc.) dont me allow me big power in higher revs.
I think about cam timing wheel or different cams + timing wheel.
Cold you recomend me the best way to solve it?
Is there some technical drawing + specification of standard STi3 cams?

Thx

john banks

Bigger turbo, would be nice if someone tries the 06 turbine wheel in the 20G as I think it would be really nice. With the setup you have you should be able to get the power to be fairly flat from 5000 to 7000 RPM.

Could try higher profile tyres, taller gearing as well.

Would try mapping your present setup and using a bit of octane booster as well, with 20G on Optimax/NF mine did 0-200kph in 12.13 according to AP22 with the five speed. Look out for your headgaskets though, but the F355 should be behind you once sorted.

hrubago

100 octane petrol is in standard offer here in Czech republic.

john banks

What boost are you running?

hrubago

Now on 1,1 bar (because Im not sure about maps over 1bar) - during last mapping I have problems with IC pipes, then injection maps for boost over 1 bar were interpolated from values 1.0 bar + safe amount :-) but im not 100% sure this is ideal :-)
What is safe boost level with correct fuelling on 2,5 hypereutic based pistons on USDM STi?

hrubago

12,13 0-200km/h really good :-)

john banks

My pistons were fine for about 15000 miles running 1.3-1.6 bar until I ran 1.7 bar with methanol and lots of timing = small crack. Headgaskets seem troublesome at high boost, I'd limit yourself to 1.4 bar to be reasonably safe for both pistons and gaskets.... this should still manage 400 lbft and I hope you could get 400 BHP out of a 20G on 100 octane fuel with a 2.5 at about 1.25 bar at 6000-6500 RPM.

hrubago

With correct maps :-)
O.K nice to hear it.
But you recomend to do it with standard sti3 cams without timing wheel?

john banks

Why not? Just get the spark and fuel correct.

hrubago

Yes :-)
Could you help me little bit. Im not sure about correct setup injector phase map and dont know if this setup has big or small efect on power and torque.

get from www.volny.cz/petra.hrubago/haltech/STI.6KM and www.volny.cz/petra.hrubago/haltech/E6K.EXE

first is map file and second is program file (480 K).
Sorry it is only one possible way, I cannot do printscreen i dos window under Win XP :-(

RUN E6K, alt+F, load map file STI.6KM.
Then Alt+m. There are maps. Down in the menu is injector phase map. Could you clarify this map for me?

john banks

Injector phase is the injector timing in relation to top dead centre. I don't think there will be anything to gain from it if the car drives nicely and economically on part throttle. The airflow on boost means that the exact timing matters little I would think.

Other comments looking at that file is that the wastegate duties at low RPM could be higher to assist spool up. You could of course run more boost, if you do consider retarding the area at 3000-4000 RPM initially and advancing at higher RPM to get power at the top. Consider advancing the ignition say 3 degrees per 1000 RPM from say 4500-5000 RPM upwards following the midrange plateau, so if you run say 13 degrees at 4500 RPM at 1.4 bar, consider running say 20 or 21 at 7000 RPM at say 1.25 bar. I can't tell you numbers for your engine, just a rough idea based on my STi 5 heads with 8-8.7:1 CR and 20G....

Looks like a nice ECU to play with once you get used to the layout.

hrubago

Perfect and very usefull infos for me. Big, big thanks.

hrubago

Please ignition values at 1 bar 4-5000 and 1 bar at 6500. 1,4 bars arent actual for me at this time. Thanks.
Or your graph?
I love this remote mapping :-)

hrubago

And now I checked my maps and i have exactly your recomendation.....
(so if you run say 13 degrees at 4500 RPM at 1.4 bar, consider running say 20 or 21 at 7000 RPM at say 1.25 bar. I can't tell you numbers for your engine, just a rough idea based on my STi 5 heads with 8-8.7:1 CR and 20G....) This is exactly my setup. :-)

john banks

Mine isn't mapped by boost pressure, but airflow so I can't look up numbers from the map to tell you.

Start with the values I suggested for 1.4 bar at 1.0 bar and work up with wideband lambda and knock monitoring. If an area shows detonation pull back until it goes away and then another degree or two. Soon you will have a shape of curve by RPM for a given boost level. Repeat the same at a lower boost level and smooth in between. Then you will see the trend you need to try higher boost. Keep everything smooth and progressive unless there is an obvious need for something very different if there is a high VE peak over a short range.

hrubago

O.K. Today I did 1degree more retarding (without knocklink) in 6 to 7k revs and small increment in wastegate duty. It looks to be little bit better.
Thanks
Dan

john banks

You should really have a passenger with det cans on or a knocklink to even be driving your car until it is mapped though.