if i get - Subaru Enthusiasts Car Club of the Sierras

gg newb · 2007-09-11, 12:40 PM

a manual boost controller and only want to boost a few more pounds out of my sti will it cause problems

ive heard good and bad things

M3n2c3 · 2007-09-11, 12:52 PM

I think I've heard enough bad that I wouldn't go for one. . .

. . .you know, if it mattered to my car.

ibscottgoesnuts

sperry · 2007-09-11, 01:01 PM

Quote:

Originally Posted by M3n2c3

I think I've heard enough bad that I wouldn't go for one. . .

. . .you know, if it mattered to my car.

ibscottgoesnuts

BOOM!

A MBC on an otherwise stock car is a terrible idea. You *will* damage the motor, because you *will* run lean.

Dean · 2007-09-11, 01:23 PM

Quote:

Originally Posted by sperry

BOOM!

A MBC on an otherwise stock car is a terrible idea. You *will* damage the motor, because you *will* run lean.

If you get custom tuned though, apparently they are the way to go. Ask Cody and Scott, they both have them.

cody · 2007-09-11, 01:24 PM

Do it right. Run the boost you're tuned for.

cody · 2007-09-11, 01:29 PM

Quote:

Originally Posted by Dean

If you get custom tuned though, apparently they are the way to go. Ask Cody and Scott, they both have them.

Scott got an MBC?

Quote:

Originally Posted by sperry

If MBC's were so great, I'm pretty sure Subaru would have put one on the car to begin with 'cause they're about 1/50th the cost of the EBC.

Quote:

Originally Posted by sperry

Call me a stick in the mud, but switching to a MBC is a step backwards IMO. Reeks of the MBC/UniChip days.

Quote:

Originally Posted by sperry

In my experience, the factory setup is far superior to a manual solution, even with the "limitations" inherent to the design.

Nick Koan · 2007-09-11, 01:31 PM

Oh yeah Cody, you weren't supposed to find out.

cody · 2007-09-11, 01:38 PM

Quote:

Originally Posted by nKoan

Oh yeah Cody, you weren't supposed to find out.

All I can say is...

BAHAHAHAHAHAHAHAHAHA

Next you'll all be running Crucial parts and going to Ed to get tuned.

sperry · 2007-09-11, 01:51 PM

Quote:

Originally Posted by cody

All I can say is...

BAHAHAHAHAHAHAHAHAHA

Next you'll all be running Crucial parts and going to Ed to get tuned.

Wasn't this joke made like 6 months ago? I thought I even made it myself shortly after it was on the car.

And frankly, I still don't like the MBC, but MikeW put it on the car. Something about not having enough time to properly tune for 22+ lbs of boost in the Hydra in time to get the car to the track in time for the season. The stock EBC wasn't cutting it, at least not without hours of tuning, so it was to the simpler MBC solution.

So, the situation's quite a bit different than a MBC on an untuned car, or even on a car with a reflash. And even still, with the MBC I was seeing 2 lbs of overboost (though on a MAP based car, that's not quite the big deal it is on a MAF based tune). Also, my motor did in fact blow up with the MBC on it, though I don't blame the spun rod on the MBC.

I'm actually planning on going with the GM solenoid when the motor gets retuned.

cody · 2007-09-11, 01:55 PM

Aw, I was only joshin'. The GM solenoid is a great way to go. FWIW, I'm still running the Hallman and lovin' it.

sperry · 2007-09-11, 02:00 PM

Quote:

Originally Posted by cody

Aw, I was only joshin'. The GM solenoid is a great way to go. FWIW, I'm still running the Hallman and lovin' it.

That's what's on my car, and I'm less than impressed. Under long pulls, the car hit and stays at the target 22psi of boost, but my tell-tale on the gauge shows 24 psi peak. Which must occur mid corner at partial throttle or some other transitional period when I'm too busy driving to watch the gauge.

I'd still rather have a computer regulating the boost than a spring, but a spring is way easier to "tune".

cody · 2007-09-11, 02:13 PM

It can fluxtuate a touch, but my logs usually show a nice smooth boost curve.

Quote:

Originally Posted by cody

Code:


RPM	Manifold Relative Pressure (PSI)
1968	-8.996
1926	-8.996
1926	-8.996
1926	-8.996
1921	-9.141
2051	-0.435
1980	0.145
1968	0.435
1983	0.725
2004	0.871
2005	1.161
2036	1.451
2055	1.741
2100	2.031
2108	2.176
2142	2.467
2154	2.757
2187	2.902
2208	3.192
2242	3.482
2247	3.627
2285	3.918
2315	4.208
2330	4.353
2356	4.643
2401	4.933
2448	5.224
2455	5.659
2502	6.094
2498	6.384
2550	6.82
2580	7.255
2625	7.835
2679	8.416
2693	8.706
2730	9.576
2781	10.447
2827	11.463
2849	12.624
2906	13.929
2948	14.8
2961	15.816
3050	16.396
3104	16.541
3146	16.541
3193	16.541
3278	16.396
3308	16.396
3351	16.396
3439	16.541
3461	16.396
3558	16.396
3588	16.396
3639	16.396
3702	16.251
3769	16.251
3811	16.251
3874	16.251
3922	16.251
3935	16.251
4011	16.251
4067	16.251
4112	16.251
4173	16.106
4230	16.106
4256	16.106
4308	16.106
4406	16.251
4456	16.106
4454	16.396
4548	16.541
4568	16.686
4638	16.686
4696	16.541
4714	16.541
4777	16.396
4867	16.251
4902	16.251
4908	16.106
4960	15.961
5020	15.816
5081	15.671
5137	15.525
5133	15.38
5205	15.235
5271	15.09
5330	14.8
5372	14.8
5380	14.655
5478	14.51
5515	14.51
5519	14.365
5601	14.22
5580	13.929
5660	13.929
5695	13.784
5725	13.784
5800	13.639
5850	13.494
5905	13.204
5905	13.204
5943	13.059
6010	12.914
6053	12.769
6083	12.624
6068	12.769
6107	12.624
6142	12.478
6178	12.333
6260	12.333
6313	12.188
6340	12.188
6324	12.043
6367	12.043
6454	12.043
6432	12.188
6527	12.043
6510	12.043
6510	12.043
6602	11.898
6637	11.898
6667	11.898
6655	11.898
6745	11.898
6745	11.898
6726	12.043
6818	11.898

100_Percent_Juice · 2007-09-11, 09:13 PM

EQ tuning recommended the Hallman to tune Imprezif's car. I know absolutely nothing about tuning or an MBC so I just took his experienced word for it.

gg newb · 2007-09-12, 12:36 AM

k thanks you guys

Dean · 2007-09-12, 06:44 AM

Quote:

Originally Posted by gg newb

k thanks you guys

Oh, don't worry, we will keep going even if you, the original poster, got the information you wanted 10 posts ago.

It's how we roll.

M3n2c3 · 2007-09-12, 07:43 AM

Quote:

Originally Posted by sperry

Which must occur mid corner at partial throttle or some other transitional period when I'm too busy driving to watch the gauge.

Could you get your in-car cam pointed at it?

sperry · 2007-09-12, 09:01 AM

Quote:

Originally Posted by M3n2c3

Could you get your in-car cam pointed at it?

The camera already points at the gauge, but 'cause it's a BF Defi, you can't see it on camera.

I keep thinking to swap out the BF dials for something easier to see, but it would just be expensive unless I can find someone w/ the non-BF gauges that just wants to trade with me.

Since I've got a RackPak telemetry setup, it would be sweet to get the gauges for it that get datalogged along with the GPS data... but if you think the Defi's are expensive, the RacePak setup is astronomical! It'd be like $2000 to replace the gauges I've already got.

2007-09-11, 12:40 PM	#1
gg newb n00b Join Date: Aug 2007 Location: reno Posts: 19 Car: 07 sti	if i get a manual boost controller and only want to boost a few more pounds out of my sti will it cause problems ive heard good and bad things

2007-09-11, 12:52 PM	#2
M3n2c3 EJ205 Real Name: Jeremiah Join Date: Jul 2005 Location: Lubbock, TX Posts: 1,888 Car: Current: 2014 Forester 2.5i Premium. Old: 2005 Impreza 2.5RS, 2000 Forester L Class: RNP, long ago (see motto) "Kids are ruining autocross."	I think I've heard enough bad that I wouldn't go for one. . . . . .you know, if it mattered to my car. ibscottgoesnuts __________________ Small red text that looks curious at first glance but is ultimately inconsequential

2007-09-11, 01:24 PM	#5
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Do it right. Run the boost you're tuned for. __________________ Slow and low, that is the tempo.

2007-09-11, 01:31 PM	#7
Nick Koan JDM Cowboy Real Name: Nick Join Date: Oct 2003 Location: Somewhere Posts: 8,642 Car: 2015 Mazda 3	Oh yeah Cody, you weren't supposed to find out. __________________ While a standard engine is powered by a belt connected to the crankshaft, a turbo engine runs on its own exhaust steam, making it more energy efficient. -- CNN

2007-09-11, 01:55 PM	#10
cody Candy Mountain Real Name: Cody Join Date: May 2005 Location: Californication Posts: 7,751 Car: 03 Pussy Wagon, now with more pink! Class: TESP OMG Internet!	Aw, I was only joshin'. The GM solenoid is a great way to go. FWIW, I'm still running the Hallman and lovin' it. __________________ Slow and low, that is the tempo.

2007-09-11, 09:13 PM	#13
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	EQ tuning recommended the Hallman to tune Imprezif's car. I know absolutely nothing about tuning or an MBC so I just took his experienced word for it. __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2007-09-12, 12:36 AM	#14
gg newb n00b Join Date: Aug 2007 Location: reno Posts: 19 Car: 07 sti	k thanks you guys