Balance Tube..

[cbileske]

Just got around to putting a balace tube between my intake pipes, made such a huge difference all throughout the RPM. It seems like the AFR stays alot more consistant all around too. I still get a little shuffle if i cruise under a little higher boost but i think this wont go away untill a MAP sensor is used instead of mafs. I now can drive down the highway in 5th doing 90-100 and it is as smooth or smoother then driving my girlfriends 2000 civic. Thanks guys for the advice to put this in.

[kelaog]

You're running 2860r-5's right?

My map system fixed this issue. However... Doesn't the stock piping kit have a balance tube as part of the recirc valve setup?

Did you take yours out originally? I found advancing the timing helps considerably with shuffle.

[donk_316]

Balance tube between the intakes... Does this mean between the MAF and the turbo inlets?

[cbileske]

yah i got the same turbos as you kealog, I originally took all the recirc piping off and built aluminum piping for both intakes. So i had no balance tube, I decided to see how much of a difference it would make if i put one in so i put the stock piping back on and cut and capped off the part that connected up with the rest of the recirc. setup. Made a big difference. Timing advance, isnt that increasing the risk of "knock"? mine is at stock timing 20 BTDC.

[GTR-Dad]

Yes.

It reduces the magnitude of airflow fluctions through the MAFs when airflow oscillates.

Dan

[kelaog]

yah i got the same turbos as you kealog, I originally took all the recirc piping off and built aluminum piping for both intakes. So i had no balance tube, I decided to see how much of a difference it would make if i put one in so i put the stock piping back on and cut and capped off the part that connected up with the rest of the recirc. setup. Made a big difference. Timing advance, isnt that increasing the risk of "knock"? mine is at stock timing 20 BTDC.

Of course more timing = knock... Just keee on p your eye on it. I just recently brought mine back down to 20BTDC. Before though I had it maybe 5 degrees advance, my pfc hit a high of only 21 "knock" but anything under 40 is safe as long as your not constantly in the 30's.

I was thinking of putting a balance tube where my mafs are suposed to be, since I no longer use them and plugging my recirc valve.

[cbileske]

yah man good idea. so your PFC shows you your knock amount?

[kelaog]

Yes it does show me my knock ratings...

After driving the car up the mountain today I found in fifth gear the turbos would bounce off each other around 3psi and fluctuate a bit... Didn't do that with the timing a bit more advanced than it is now. Maybe I'll adjust that load map to be a bit more advance.

[cbileske]

yeah sounds about the same as mine, 5th gear low boost, but if i downshift into 4th and boost up and then shift into fifth it will continue to not shuffle untill you let off.

[GTR-Dad]

Of course more timing = knock... Just keee on p your eye on it. I just recently brought mine back down to 20BTDC. Before though I had it maybe 5 degrees advance, my pfc hit a high of only 21 "knock" but anything under 40 is safe as long as your not constantly in the 30's.

Timing should be set to achieve mean best torque and stay a safe distance from the knock threshold.

Be aware that the factory knock sensor output depends significantly on installation torque. There is no substitute for learning what knock sounds like and listening for it when you tune.

Dan

[cbileske]

20BTDC is pretty safe is it not? or should it be retarded for 94octane fuel? im not running any manegment yet still on stock setup, My AFR is good. would putting the balance tube in change my timing at all?

[kelaog]

20BTDC is pretty safe is it not? or should it be retarded for 94octane fuel? im not running any manegment yet still on stock setup, My AFR is good. would putting the balance tube in change my timing at all?

Balance tube would not affect your timing. It may actually create a bit more power as there is a bit less turbulence in the intake flow.
20btdc should be SAFE as that's the cars factory setting.

[cbileske]

Yeah it seemed to pull a little harder all around actually, Im going to recheck the timing just to be sure, it was set at 20BTDC originally, and 94 octane fuel is always run.