Diesel boost compensator

Submitted: Sunday, Feb 08, 2004 at 14:31
ThreadID: 10357 Views:18163 Replies:5 FollowUps:5
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I have seen an advert by a diesel service centre for a boost compensator " which controls your fuel according to boost pressure " & offers smoother running, better ecenomy,power,driveability,longer engine life,controlled smoke emissions.

Seems to me the mechanical injection systen does not have the ability to change the mixture like an EFI system so the Q is does anyone have any experience of these.

Thanks a lot......IAN
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Reply By: Member - Ken - Sunday, Feb 08, 2004 at 18:17

Sunday, Feb 08, 2004 at 18:17

I believe what you have described is a 'ANEROID'.

If so, they fit on top of rotary diesel pumps and in Australia are used in conjunction with Turbo Chargers to control the boost/fuel ratio.

I had an after market Turbo fitted to a 1HZ about 2-3 years ago and an ANEROID or BOOST COMPENSATOR was part of the deal.

The Toyota Factory fitted turbos come standard with the subject apparatus which is also known as a 'altitude compensation device'.

There is a lot more to the 'doctorine of turbo charging diesels' other than ANEROIDS, so other than saying that it does what it supposed to and I am more than happy with it, I'll leave it at that or to the other experts on this forum.


Ken Robinson

AnswerID: 45890

Reply By: Dave from Fraser Coast 4WD Club - Sunday, Feb 08, 2004 at 18:39

Sunday, Feb 08, 2004 at 18:39
I read an article on Alben Perret's (owner of LCMP) old 75 ute and it said that he had a boost switch and fuel compensator put in By ARB in brissy (can't remember the store). I emailed the store with no return and then ARB head office, also with no reply, so I gave up.

Noone I have talked to around town here knows much about them. They all know how to install a turbo or set up the fuel pump but that's about it.
AnswerID: 45894

Follow Up By: David N. - Monday, Feb 09, 2004 at 11:05

Monday, Feb 09, 2004 at 11:05
I believe IMHO they are a "nice to have" but if your turbo is set up properly, not really necessary unless you are in "alpine" regions a lot.

Basically a lot of extra dough for a small gain..... I don't have one and don't see the need personally. My TD42 turbo barely smokes at all when driven normally. Cheers
FollowupID: 307920

Follow Up By: ianmc - Monday, Feb 09, 2004 at 12:49

Monday, Feb 09, 2004 at 12:49
Thanks for info so far.
I just feel that the system on my ute does not compensate as well as it might for varying load/throttle combinations and the fuel consumption of diesels is rapidly being caught up by petrol engines which, if they did not seek to outdo each other with top end on paper figures, would be closer to diesel numbers.
Higway mpg figures with a Commodore sedan are better than my similar weight Triton. Surely not all in the wind resistance as Triton is fairly clean & canopy & tub is in line with cab 100%.
Commodores achieve 8l per 100kms & Triton does 10l 100kms at 100kmh. I need a tail wind & 80-90 cruise to achieve the same.
Compared off-road & in bush with petrol 4wds its well ahead .
FollowupID: 307928

Follow Up By: David N. - Monday, Feb 09, 2004 at 21:10

Monday, Feb 09, 2004 at 21:10
You'd probably be surprised at the difference in drag between your Triton and a Commodore- not just wind but also drive train, tyres etc.
Try comparing with a petrol Triton for a more valid comparison.
P.S. My Patrol gets 10l/100km @ 100kph on the highway.
FollowupID: 307992

Reply By: Red Rover - Monday, Feb 09, 2004 at 15:04

Monday, Feb 09, 2004 at 15:04
Where abouts r u Ian. If u r in brisbane check out highway diesel and they will put u in the picture. A mates car was done there then dynoed at Brisbaen Tuning and pumps out 1000 FT per lb of torgue NO JOKE! So whatever they did it really goes.

AnswerID: 45994

Reply By: Mick - Monday, Feb 09, 2004 at 21:34

Monday, Feb 09, 2004 at 21:34
The aneroid is the air fuel ratio control that is an add on to the top of the fuel injection pump, youll see them on newer cars such as the GU patrol 4.2.
It controls the fuel mixture going into the engine at the right rev range and turbo boost pressure, so the fuel consumption is better, and less pollution.
AnswerID: 46062

Reply By: donk - Monday, Feb 09, 2004 at 21:49

Monday, Feb 09, 2004 at 21:49
I think there is actually 2 different parts fitted to the top of toyota injection pumps that appear to be the same but have different functions

Factory Turbo engines have a Boost Compensator that increases fuel at high boost

Late model non Turbo Engines have a High Altitude Compensator that decreases Fuel at High Altitudes to stop overfueling & Oil thickening

Both parts look the samee but have a different function

I could be wrong but this is my understanding

Regards Don
AnswerID: 46065

Follow Up By: ianmc - Monday, Feb 09, 2004 at 23:39

Monday, Feb 09, 2004 at 23:39
Thanks so-far for all replies. Anyone know what they cost?
FollowupID: 308020

Follow Up By: ianmc - Monday, Feb 09, 2004 at 23:46

Monday, Feb 09, 2004 at 23:46
Ok Comparing the 2.5td with the 2.6 petrol Paj from all reports they do about 21mpg highway (about 7km/l). The same motor in a Manual Sigma which is much lighter than a Commodore from my own experience has trouble doing over 30m,pg nowhere near the later larger Commodore but few older 2litre petrols seem to do much better except for some Euros.
FollowupID: 308023

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