Attn john, Supra ?

[HONDA GHANDI]

Im doing a Greddy BCC and APEX-i AVC-R on a 93 supie next week, what should I set the max boost levels to? I dont think the car has any tuning devices so I was just wondering what the ECU was good to on its own.

[HONDA GHANDI]

up

[V8SpankR]

I think max boost the stock turbos can push is about 18psi without just blowin' hot air.

[HONDA GHANDI]

I was thinking 18 or 19 but wasnt sure the ECu would be fine with that. Since I have no way to tune it I have no way of knowing that its ok. I guess we shall see.
I am setting up the boost cut controller to cut at 19 psi and the AVCR to have a 18 psi set and a 14 psi set.

[HONDA GHANDI]

up once more

[stu]

John, what if Tobi was bleeding to death, and needed to know where the hood release was to get his partially severd arm out from underneath the hood? You'd be responsible for his untimely death.

[CT9A]

:rofl:

[V8SpankR]

:D:D:D hehehe

[Kwando]

He still hasn't replied. :rofl:

[HONDA GHANDI]

Ah fuck, Im dead. :p

[john]

Sorry Tobi. I never saw this thread.

Without a BCC / voltage clamp, 1 bar. Anything beyond that for more than (I believe) 2 seconds will induce fuel cut. With the BCC, 18psi-20psi is all they will make. I ran 18psi on mine w/101 and it made 427 rwhp.

The BCC should be set for about 4.27 - 4.29 volts.

Look here (http://mkiv.com/techarticles/bcc/bcc_install/bcc_intro.htm) and here (http://mkiv.com/techarticles/bcc/why_bcc/Why_the_GReddy_BCC.htm).

I apologize for the late reply.

[J_Smuggler]

Hey Tobi, I found this a while back when i was trying to figure my AVC-R. Its for a Supra if running stock twins. Not sure if this will help you any.


Advanced Tuning Section:

*****IMPORTANT NOTICE*****
Do this ONLY if you know exactly what you are doing..and that you are familiar with your AVC-R


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NE Points:

Definition/Usage: NE Points (a.k.a. RPM points) are used by the AVC-R to control boost at specific RPM's.

Recommended NE Points: (Assuming you're on stock twins using Sequential setup)

2000
2500
3000
3500
4500
5000
5500
6000
(4000 is not needed...for it is the transition period for 1st->2nd turbo where the boost drops)



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*Feedback Speed Setting:

Definition/Usage: The numbers used in F/B Speed pretty much acts like a "delay time" in which boost is controlled. So the higher the speed is set to, the longer it would take for the AVC-R Solenoid to act and control boost. As with the lower the speed, the faster the Solenoid would act to regulate sudden boost overshoots. If your unit's having a hard time surpressing overshoots, try lowering the speed setting in increments of 1.

For BPU-level Supras I'd recommend setting it at:
3 2 2 2 2
If overshooting still occurs, then try:
2 1 1 1 1
Once lowered, the AVC-R solenoid will respond more quickly to avoid boost overshoots.



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*Start Duty:

Definition/Usage: The Start Duty is pretty much increasing/decreasing your set Duty Cycle (in 1% increments) for any particular gear. Let's say your Boost is 1.2kg/cm², and Duty Cycle is at 70%. Boost seems to hold without a problem in 1st gear... 2nd gear... but when you shift into 3rd gear...your boost shot up to 1.27kg/cm...you would then go into the St Duty menu ..and under 3rd gear...lower the Duty for 3rd Gear... (ie -4%)

Now this is what your AVC-R's Duty Cycle would look like when your at 70% Duty:

1st Gear: 70% (Holding fine)
2nd Gear: 70% (Holding fine)
3rd Gear: 66% (Dropped 4% as a result of using St Duty...and it now also holding fine)
4th Gear, 5th Gear.......etc...
Keep lowering the St. Duty in 1% increments for that gear until you get it right.

If you hit target boost correctly on each gear, then the St. Duty for that gear should be kept at +/- 0.



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***NOTE***

In order for the F/B Speed and St. Duty to work, you must have your Gears properly learned, using the Gear Judge Feature.



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How to Use Gear Judge? Read on!



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Gear Judge:

Definition/Usage: The AVC-R pretty much learns your gears by taking the RPM in the gear you're at...and dividing it by the speed your car's currently at, (in km/hr) and thus makes a ratio # that will be applied in "judging" exactly what gear you're at.

Formula: RPM/Speed

Under "Etc/Gear Judge", Press NEXT >

You will see Gear Judge menu, Gears 1-5 displayed.

On the right side...you should see the Ratio # (255 when car is at a stop)

Now drive your car into 1st gear at a moderate speed...around 30mph will do. (The ratio is kept at a constant...so it doesn't matter how fast you go..as long as you're in the proper gear) Now highlight the ratio # box in 1st Gear...and press NEXT>

Your car has now learned your 1st gear (Around 90 for AUTO's) ...now shift to 2nd..and do the same for the rest. This will now enable features such as St. Duty, F/B Speed, etc. :)

[john]

The AVC-R is way too much. Use a good ball & spring. Hallman comes to mind. :) :)

[HONDA GHANDI]

I thought so too on the AVCr but thats what my customer bought so I am not going to argue. I aim to please you know. thanks for the reply john. I think this guy is a daily driver so what is maximum boost for Colorados wonderful pump gas?


Thanks smuggler, very good input.