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Old 11-06-2007, 09:46 PM   #76
WeldingHank
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yep, they will work just the same.
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Old 11-07-2007, 01:14 AM   #77
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Man i just did this with my turbo xs boost controller and holly crap its smooth!!!
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Old 11-09-2007, 06:00 PM   #78
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what about the wastegate iat comp table, seems like if I set my wgdc to 100% in the 100% tps column that it will still drop when I have low iat in the winter (like now) so wouldnt that cause the bcs to still pass air or no?
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Old 11-09-2007, 11:07 PM   #79
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Has anyone had any problems with their boost levels being too high.

When I had this on my 16g, I didn't have any issues- now, with the 20g, I can't run any less than 22 psi with my MBC at its minimum setting.

Weird....
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Old 11-09-2007, 11:13 PM   #80
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Quote:
Originally Posted by crazymikie View Post
Has anyone had any problems with their boost levels being too high.

When I had this on my 16g, I didn't have any issues- now, with the 20g, I can't run any less than 22 psi with my MBC at its minimum setting.

Weird....
This doesn't make sense to me.

If you use the just the EBC, does that work better?

I'm inclined to think it's boost creep.
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Old 11-10-2007, 06:37 AM   #81
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what's your wastegate boost, mikie? hose straight from compressor to actuator gives you what?
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Old 11-10-2007, 08:36 AM   #82
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It was like 10-12 psi when I ran it straight from the wastegate.

It's definitely not creep- it hits 20-22psi and then just holds like a rock.
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Old 11-10-2007, 12:07 PM   #83
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any thoughts on the wgdc iat comp table when it comes to setting the 100% throttle column to 100% wgdc so that boost will be regulated by the mbc?
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Old 11-10-2007, 09:32 PM   #84
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i'd say set your 100% TPS boost targets to something slightly above what your MBC is set to. that way, the ECU is always trying to acheive target but can't.
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Old 11-11-2007, 07:27 AM   #85
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yes. set the target at 100% tps to something like 30psi, for example. the intention is to peg the electrical solenoid at 100% duty.

depending on the setup, getting close to 100% may be sufficient, but 100% is the only way to be certain it's JUST the mbc in the loop.
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Old 11-11-2007, 09:51 AM   #86
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Quote:
Originally Posted by ride5000 View Post
yes. set the target at 100% tps to something like 30psi, for example. the intention is to peg the electrical solenoid at 100% duty.

depending on the setup, getting close to 100% may be sufficient, but 100% is the only way to be certain it's JUST the mbc in the loop.
Yeah thats what I figured, my only concern was that as of right now when I do datalogs I see a reduction in wgdc because of the temp outside. So I assumed that I would see the same thing when its set to 100% and the temp drops, so I thought maybe I should change some stuff around in the wgdc iat comp table. So if I set the target boost to 25 psi, but I am shooting for 22 psi with the mbc and I set the wgdc to 100% in the 100% column it will still hold if the wgdc comp table drops the wgdc to something like 97% or 94%?
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Old 01-07-2008, 02:36 AM   #87
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Ok so i just redid this mod but im back to the stock EBC and using the halman. I reflashed my stock ecu with a stage 2 map thats slightly tuned. But how would i tune it for this???
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Old 01-07-2008, 06:36 AM   #88
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you just need to make sure that the boost control solenoid runs 100% duty cycle when at WOT, leaving the MBC as the only device in the loop.
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Old 01-07-2008, 12:54 PM   #89
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Quote:
Originally Posted by ride5000 View Post
you just need to make sure that the boost control solenoid runs 100% duty cycle when at WOT, leaving the MBC as the only device in the loop.
gotcha...do i set my MBC to hit target boost or just above it?
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Old 01-07-2008, 01:34 PM   #90
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the mbc should be used to set your target boost, since nothing else will be limiting boost while at WOT.
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Old 02-21-2008, 05:06 PM   #91
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ok so i gm bcs (in 2port operation) and a protune for 18.5 psi. if i were to do this setup would i see any improvement and would i have to get another tune? also a buddy of mine sold me a hallman for next to nothing. so i have all the parts at hand.
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Old 02-21-2008, 11:19 PM   #92
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you will need to run in 3-port mode and will require a complete retune.
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Old 03-11-2008, 05:18 PM   #93
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Allright guys, I need some help. I installed the GM silinoid/Hallman MBC setup on my car about a week ago, and cannot seem to get it to work right. Its hooked up Compressor nipple to tee, one end of tee to MBC and other end of tee to BCS. (Yes I have tripple checked to make sure they are hooked to the corect ports on both the BCS and MBC) Port two on BCS runs to tee, one end to Wastegate, other to output port of MBC. port 3 on BCS (originally the one with small filter) runs bact to intake. Now with it hooked up in this manner and the stiff spring in the MBC cranked all the way down, and the BCS at 100% duty, I can still only make about 16lbs of boost, and I don't get it till about 5500rpm. To me it seems like the MBC is not holding pressure. Has anyone ever heard of a Hallman MBC failing? It seems unlikely do to the simplisity of the design, but I suppose it is possible. Sorry for the long winded post, but my question is, does anyone else know why, essentially, to much air is getting to the wastegate.
Relivent mods are UTEC, TD0518G with frontmount, no restrictor pill. (although tested with and without) TXS catless turboback exaust, and K & N intake.
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Old 03-12-2008, 07:34 AM   #94
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are you sure you're plugged into the normally open pneumatic port on the solenoid?

get a hemostat or a small pair of locking pliers and clamp off the feed to the solenoid completely to remove it from the equation entirely.

also, are you SURE you have a stiff spring in the hallman? mine came with a soft spring installed and i had to swap it out.

finally have you EVER made more than 16psi with this turbo? what is the wastegate tension set to?
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Old 03-12-2008, 01:20 PM   #95
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Quote:
Originally Posted by ride5000 View Post
are you sure you're plugged into the normally open pneumatic port on the solenoid?
Yes, tried taking the MBC out of the equation, and put lower numbers in my map and easily hit my targets, so the solenoid is working properly.

get a hemostat or a small pair of locking pliers and clamp off the feed to the solenoid completely to remove it from the equation entirely.
Did that as well, and only hit 10psi with just MBC.

also, are you SURE you have a stiff spring in the hallman? mine came with a soft spring installed and i had to swap it out.
Yes, tried both to be sure, but definatly have the stiff spring.

finally have you EVER made more than 16psi with this turbo? what is the wastegate tension set to?
Yes, turbo has made over 20 (first test with restrictor still in place)


I talked to hallman yesterday, and they told me that sometimes the MBC can stick. I think that even though I cranked the knob with both hands till it stoped it was only about 6 turns from fully open with the heave spring, so today after work I am going to try a few drops of pneumatic oil in it and see if I can loosen it up and crank it down somemore. That is about the only thing left that I can think of. Thanks for the quick reply, and Props for comeing up with this setup.
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Old 03-30-2008, 08:53 PM   #96
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so of all this hybrid talk, could you run a dual stage MBC in line with the stock BCS with a stock EM tune? let stage 1 of the MBC open so that it doesnt touch boost, and allows the BCS to do all the work and cure PTFB, then set stage 2 of the MBC to your max boost ( lets say 16 psi) take over once at WOT and the BCS is no longer in control. so it would be routed..... compressor nipple----> dual stage MBC------> stock t fitting----->BCS. the other end of the stock t fitting goes to the wastegate. hows this setup sound
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Old 03-31-2008, 07:17 AM   #97
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you might have to partially disassemble the dual stage mbc so that you could ensure that the pressure signal is in no way obstructed from the WGA while the 1st stage was active, but otherwise i don't see a reason why it wouldn't work.

you could probably save money by just using a discreet solenoid (grainger/perrin/gm) and separate mbc though.
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Old 04-15-2008, 10:18 PM   #98
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Ken, you are THE MAN. I just ordered a Hallman unit and can't wait to put it in.

Also, I'm interested in your thoughts as to what RPM that you think the EJ20x is starting to reach the point where exhaust gasses are better routed through the WG instead of the turbine with the TD04. Your reasoning is solid in that at some point the turbine becomes the flow limiting factor and excessive back pressure results with no manifold pressure gains. I just wonder what that point is.

Buck
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Old 04-21-2008, 04:55 PM   #99
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buck, i don't really know.

i know there is some point at which you get much diminishing returns, but i do not bother tapering boost. i played around with boost tapering when it was the "hot topic" around here like 4 years ago, but i tired of it. for the amount of time i actually spend at 6k rpms and up it is just not worth my trouble... ie, i've got everything i need for a very nice ADI rig but i have no time to install it! i'd rather spend my time elsewhere.

that said i know crazymikie has an ej207 and the last time he was on the dyno he picked up a little bit of power by reducing duty cycle/relaxing wastegate tension on the high end. this was ~7-8500 rpms and with a td06 w 8cm housing iirc.
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Old 04-21-2008, 05:17 PM   #100
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Ok. I think that I'll experiment a bit. I installed the ceramic ball and spring Hallman MBC. It's the same one that you have minus the remote. I'm loving the rock solid boost.

Anyway, I guess I'll start out by keeping WGDC at 100% till redline, then comparing Vmaf at lesser WGDC to see what how they compare. If Vmaf actually goes up at lesser WGDC, I'll keep reducing it until Vmaf starts going down.
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