Cheap boost control for Tdi
Submitted: Wednesday, Sep 21, 2005 at 20:56
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Member - Oskar (Bris)
This arvo I fitted a $35 Turbotech adjustable boost controller on my 2.7 Tdi.
I must say I'm quite impressed with the increased boost and acceleration for a 15 minute installation.
Without the controller - max 8 psi boost @ 3000 rpm
With the controller - 8 psi boost @ 2300 rpm
Max boost 14 psi @ 3000 rpm so the power comes on pretty strong between 2500 and 3000 rpm.
Apparently the valve holds the wastegate actuator closed until the desired boost pressure is reached and only then does the wastegate start to open.
It's a shame about the cost of fuel because I suspect I may be a bit partial to car-like acceleration in the 4by.
At $35 I figured it's worth a try for a controller that's not just an overpriced air-bleed system. (Apparently the Nissan Skyline boys really like them)
No... I'm not posting a free commercial.. just passing on some info for those who may be interested.
I think they are made by a chap in
Bendigo.
Cheers
Oskar
Reply By: ACDC - Wednesday, Sep 21, 2005 at 21:24
Wednesday, Sep 21, 2005 at 21:24
Can't see how it can make boost come in earlier.
AnswerID:
131264
Follow Up By: guzzi - Thursday, Sep 22, 2005 at 09:05
Thursday, Sep 22, 2005 at 09:05
ACDC,
It wont allow the waste
gate to open UNTIL 8PSI is reached.
Without it the waste
gate will partially open from (bum pluck figure) say 5psi, it will eventially reach 8psi but it will need to be spinning a lot faster (higher engine RPM) and moveing a lot more air as the system is trying to bleed it off sooner. So higher PSI at lower RPM = more low down grunt.
Now that youve got the bleed valve fitted, go and get the thing properly tuned, by a reputable diesel outfit, the combined difference that will make is a pleasant surprise.
FollowupID:
385680
Follow Up By: Member - Oskar (Bris) - Thursday, Sep 22, 2005 at 16:08
Thursday, Sep 22, 2005 at 16:08
Yeah .. I'm no expert but I'm told they call that "wastegate creep".
Real low down torque is unchanged I think .. but it has made a big diff further up the rev range. I checked it today (went for burn) and noticed that it got to 8 psi at about 1900 rpm not 2300 rpm as I first thought. You're correct Guzzi in that, with the standard set-up, the boost is starting to bleed off much sooner than it is now.
It's much better up hills and overtaking now.
I've fitted a modified cut-off solenoid bypass system to allow a normal boost circuit to work until I flick the switch and then the extra boost comes on line.
SWMBO was not really interested in the extra boost setup until she had to drive it. Her comment was " can we just keep it the new way and not bother about the "normal" setting any more."
FollowupID:
385720
Reply By: JamieMac - Thursday, Sep 22, 2005 at 09:25
Thursday, Sep 22, 2005 at 09:25
Is it purely mechanical device or does it have electronics n stuff to control it? Where did you get it?
I tried a boost controller to increase the low end boost but the top end went ballistic so i took it off again as I had 10psi as from std settings
JamieMac
AnswerID:
131316
Follow Up By: Member - Oskar (Bris) - Thursday, Sep 22, 2005 at 16:18
Thursday, Sep 22, 2005 at 16:18
It's a very simple mechanical device(I suspect about $10 worth of off-the-shelf bits including a spring out of a parker papermate pen and a 5mm ball bearing out of a bicycle pedal crank). Check out Turbotech on Google.
It doesn't do much for real low-down torque as you have said but the boost from 1900 rpm (or less) is good.
Apparently some "air-bleed" models (controllers that just bleed off turbo pressure before reaching the wastegate actuator) cause some unwanted effects ("boost-spiking" or something like that.) I wouldn't have a clue what it really is but it sounds unwanted anyway.
Cheers
Oskar
FollowupID:
385721
Follow Up By: Ando80 - Saturday, Sep 24, 2005 at 01:24
Saturday, Sep 24, 2005 at 01:24
Well, tried google with turbotech and couldn't find anything on their site about this boost controller!! anyone got a link???
FollowupID:
385968
Follow Up By: Member - Oskar (Bris) - Friday, Sep 30, 2005 at 17:28
Friday, Sep 30, 2005 at 17:28
Ando
Try Turbotech on Ebay
Oskar
FollowupID:
386852
Reply By: prado_95 - Saturday, Sep 24, 2005 at 22:03
Saturday, Sep 24, 2005 at 22:03
Oskar,
Is this a 200 or 300 series TDi engine?
be careful running that much additional boost under anything but short duration. Thats a 75% overboost. A lot of additional boost on a standard engine if reliability is required.
That equates to a lot more power and combustion heat (assuming there is actually sufficient addtional fuel to use the additional oxygen in the air charge). What are you expecting for engine life?
With a properly setup diesel fuel system almost all the fuel should be consumed at the factory settings (diesels dont usually burn all the fuel injected - about 70% v 80% on petrols). Older diesel engine designs tended to be a little more smokey than later engines.
Unlike a petrol engine which require a narrow A/F ratio range, diesel engines should normally be running with more air than is required for good combustion, without undue heating from the turbo system. Any additional air just results in additonal stress (pressure) and heating of the air charge (and subsquently engine components). Hot air is not good for best performance, or the additional thermal stress that is created (without any real power gains). Without an intercooler this situation is worse.
Without looking up the specs, I'd sugest that your wastegate actuator was out of calibration a bit. You have overcome some of that loss, and added additional boost
well above the factory settings.
LR tend to use a small turbo & compressor when compared to other engines in their class. The turbo compressor is likely to be starting to operate outside of its effiency range as
well. This tends to create more heat and less pressure than operating inside the efficent zone. Have you considered dropping the pressure setting back until just before there is a drop in engine power (or black smoke) - in the interests of engine life?
Dave
ENG-TEK
AnswerID:
131666
Follow Up By: Member - Oskar (Bris) - Sunday, Sep 25, 2005 at 15:11
Sunday, Sep 25, 2005 at 15:11
Dave
Thanks for the info
The engine is a intercooled Nissan 2.7L TD in a Terrano II.
My plan is to run standard boost unless extra power is needed for hills or overtaking etc but I think it wise to drop the boost back a little. I have a solenoid valve set-up that I can control from the cab that by passes the controller to run standard boost for most running around .( Bits and pieces from the wrecker etc).
I was just seeing what sort of difference the extra boost makes.
When you mention temperature do you mean EGT or
water temp?
Cheers
Oskar
FollowupID:
386066
Follow Up By: SantaAus - Monday, Sep 26, 2005 at 21:55
Monday, Sep 26, 2005 at 21:55
Oskar, did i miss anything or did you upgrade to the Terrano II?
FollowupID:
386243
Follow Up By: Member - Oskar (Bris) - Friday, Sep 30, 2005 at 17:24
Friday, Sep 30, 2005 at 17:24
Sorry for the late response but I've been up at
Double Island Point for a week.
I bought a mate's '97 TII for his trade-in price, (raised
suspension, air-locker, roof-rack, mags etc. etc.) It's a manual.
I've still got the old one and I'm trying to decide which one to keep.
The old one is in really good nick and all the bugs are ironed out. I've got an intercooler for it plus it's got a storage system/kitchen in the back, a roof-rack system that's anchored in to the main side/roof frame (and it's an automatic (re-built to Australian specs) - which I really like in the bush and on
the beach and big
wheels. We love the electrics and the climate control and the great stereo.
The old one has a lot of plusses as you can tell.
I've got the old one advertised but haven't sold it yet.
I might just sell the TII instead.
Cheers
Oskar
FollowupID:
386851
Follow Up By: SantaAus - Friday, Sep 30, 2005 at 18:41
Friday, Sep 30, 2005 at 18:41
4 days ain't that bad as a reply. Looking at your old rig and what she is loaded up with i would hesitate in selling it. Never diven a T2, so i can't compare. I finally fitted that dump pipe i bought of you, the guys at the exhaust center had to modify the scalops to fit the nuts on, no big deal. Was a big deal when they decided to pull the turbo off to fit, then forgot to put the copper washers back on the high pressure lines, forgot the gasket for the oil drain line, and broke a stud off the exhaust manifold.
Works
well, extra power. Just got back from towing a car and tralier 1500Km and it wen't brillantly. The dump pipe got red hot while on the road, as in glowing. Will have to shield it abit. I am glad that you bought up the boost controller here, or would not have thought about looking at ordering one. Skyline Aus, give these little devices a good rap. So i wen't and ordered two, one for me and another for a friend running a 2.8TD 2000 Patrol. Will see how they go when they get here next week. Also will post results of teh install and test drive.
SantaAus
FollowupID:
386865
Reply By: Ando80 - Friday, Oct 07, 2005 at 22:18
Friday, Oct 07, 2005 at 22:18
thanks for showing me in right direction... been on ebay and ordered two, one for my 1hz with aftermarket turbo and one for my dad with a hj61 turbo diesel..
been looking for something similar and would never have found it without this post..
cheers
Ando
AnswerID:
133553