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Fourtrak pump tweaking
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Post new topic   Reply to topic    Difflock Forum Index -> Nissan, Mitsubishi, Isuzu (inc Vauxhall) & Daihatsu
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RL12
Just got MTs


Joined: 22 Aug 2010
Odometer: 297
Location: Devon/Shropshire


1987 Daihatsu Fourtrak

PostPosted: Wed Apr 25, 2012 12:50 pm    Post subject: Fourtrak pump tweaking Reply with quote

How much is it possible to adjust the fuel pump up for good performance whilst keeping it reliable and not reducing the fuel efficiency too much... I know though three things don't really go together but whats the ideal setup/ what do you guys use basically.

Any Info for non turbo, turboed and intercooled engines settings appreciated, cheers.

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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Wed Apr 25, 2012 5:37 pm    Post subject: Reply with quote

at the end of madtrak i had the max fuel screw all the way in,the daiphram turned to the widest bit,the star wheel wound all the way down and the smoke screw on the highest bit

from the start to the end of madtrak i was getting around 22mpg


if i was you i would turn the daiphram to the widest bit and do 1/4 turn on the max fuel screw that way you should get abit more poke without useing too much fuel,you should even find you wont use as much as you did before.


just keep a eye on your temp gauge after doing it just incase it starts getting hot

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EnFlaMEd
Winch Assistant


Joined: 27 May 2011
Odometer: 94
Location: Adelaide, South Australia


1990 Daihatsu Fourtrak

PostPosted: Sat Apr 28, 2012 3:30 pm    Post subject: Reply with quote

what is hot for these motors? Mine sometimes gets close to 700degrees and its stock fuel/boost.
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fingers92
Just got MTs


Joined: 21 Sep 2010
Odometer: 266
Location: hindhead



PostPosted: Sat Apr 28, 2012 7:57 pm    Post subject: Reply with quote

ihi turbo spec sheet i got says rhf5 series turbo i think that what fourtrak uses got max allowable egt of 950 deg c. i would say max of about 800 long drags or 850 short periods
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Nathaniel
Difflock Royalty


Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire


1979 Suzuki LJ

PostPosted: Sun Apr 29, 2012 8:54 pm    Post subject: Reply with quote

I've had a lot of sucess with setting the smoke cam (nut and bolt in the diaphragm cover on top of the pump to its higest point, or even fitting a washer under it, and have always wound the star wheel right down and set the diaphragm to its widest point.

Then try tweaking the fuel screw.

I've found I use more fuel when driving it like a nun and keeping under 2000rpm then I do letting it hurry on a bit more and use the turbo but always with less than 1/2 throttle.

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Nat

If You Open Your Mind Too Much Your Brain Will Fall Out
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RL12
Just got MTs


Joined: 22 Aug 2010
Odometer: 297
Location: Devon/Shropshire


1987 Daihatsu Fourtrak

PostPosted: Tue May 01, 2012 8:15 pm    Post subject: Reply with quote

thanks for the info guys Smile

Nathaniel wrote:
have always wound the star wheel right down and set the diaphragm to its widest point.


sorry, i don't really have much experience with things like this, which one is the star wheel and 'setting the diaphram to widest point?'

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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Tue May 01, 2012 8:36 pm    Post subject: Reply with quote

RL12 wrote:
thanks for the info guys Smile

Nathaniel wrote:
have always wound the star wheel right down and set the diaphragm to its widest point.


sorry, i don't really have much experience with things like this, which one is the star wheel and 'setting the diaphram to widest point?'



i will do a little vid for you tomorrow if i remember

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JemAndes
Just got MTs


Joined: 25 Jul 2011
Odometer: 446
Location: 10th region (lakes region) Chile


1998 Daihatsu Fourtrak

PostPosted: Tue May 01, 2012 10:11 pm    Post subject: Reply with quote

Parrot, you should set up tutorial vids and start charging. Very Happy Then you'd be able to afford the Madtrak2/Jr...? Wink
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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Wed May 02, 2012 6:13 pm    Post subject: Reply with quote

here you go
http://www.youtube.com/watch?v=n3MTJz0msKU

and this is what the 306 boys do Shocked

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fourtrak craige
Articulating


Joined: 21 Mar 2012
Odometer: 863
Location: oxfordshire


1997 Daihatsu Fourtrak

PostPosted: Wed May 02, 2012 7:01 pm    Post subject: Reply with quote

cough cough, my input, PARROT, PARROT you hear me? LEGEND!!!! Cool Cool Cool Cool Cool Cool Cool

so you didn't notice much more smoke then you turned the screw then?

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if i can't break it, it must be a fourtrak

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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Wed May 02, 2012 7:20 pm    Post subject: Reply with quote

fourtrak craige wrote:
cough cough, my input, PARROT, PARROT you hear me? LEGEND!!!! Cool Cool Cool Cool Cool Cool Cool

so you didn't notice much more smoke then you turned the screw then?



Very Happy Cool

what the smoke screw??,yea it gave me more smoke but that was it

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fourtrak craige
Articulating


Joined: 21 Mar 2012
Odometer: 863
Location: oxfordshire


1997 Daihatsu Fourtrak

PostPosted: Wed May 02, 2012 7:23 pm    Post subject: Reply with quote

parrotveasey81 wrote:
fourtrak craige wrote:
cough cough, my input, PARROT, PARROT you hear me? LEGEND!!!! Cool Cool Cool Cool Cool Cool Cool

so you didn't notice much more smoke then you turned the screw then?



Very Happy Cool

what the smoke screw??,yea it gave me more smoke but that was it



how much more is more? might have a play tomorrow Twisted Evil

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if it ent broke i'll break it Smile
if i can't break it, it must be a fourtrak

for all diahatsu parts give bloodredoffroad.com a call
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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Wed May 02, 2012 7:37 pm    Post subject: Reply with quote

try it and see,they are all different

imo you will be better to do a 1/4 turn on the max fuel screw

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fourtrak craige
Articulating


Joined: 21 Mar 2012
Odometer: 863
Location: oxfordshire


1997 Daihatsu Fourtrak

PostPosted: Wed May 02, 2012 7:50 pm    Post subject: Reply with quote

will do the fuel screw, it won't drop my Mpg too much will it?

i get a nice puff of black when i plant it in mud Twisted Evil
ah its all trial n error Laughing

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if it ent broke i'll break it Smile
if i can't break it, it must be a fourtrak

for all diahatsu parts give bloodredoffroad.com a call
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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Wed May 02, 2012 7:52 pm    Post subject: Reply with quote

yea all trial n error,you will find the best setting for you
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fourtrak craige
Articulating


Joined: 21 Mar 2012
Odometer: 863
Location: oxfordshire


1997 Daihatsu Fourtrak

PostPosted: Wed May 02, 2012 8:00 pm    Post subject: Reply with quote

i think this engine will be the best Razz

nice big juicy cummins V8 Twisted Evil

ye will see whats what, all depends on what exhaust i have on the ol' girl too.

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if it ent broke i'll break it Smile
if i can't break it, it must be a fourtrak

for all diahatsu parts give bloodredoffroad.com a call
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JemAndes
Just got MTs


Joined: 25 Jul 2011
Odometer: 446
Location: 10th region (lakes region) Chile


1998 Daihatsu Fourtrak

PostPosted: Tue May 08, 2012 5:17 pm    Post subject: Reply with quote

Today, I played the pump. I turned the "star" screw down Question 1 complete turn, and spun the diaphram with plunger 180 (wide side front), with a 1-1/4 turn on my fuel screw.

My friend here (a Chilean guy), told me that the emissions are fairly stricked on the smokle density here for TR (MOT). So, he told me a bunch of the guys that have our pumps advance the pumps to advance the injector a bit and lessen the smoke but keep a more constant fuel consumption. Has anybody done this?

By advancing the pump, I mean loosening the 4 mounting bolts on the pump and twisting the whole pump toward the right (UK Driver side).
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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
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Location: bradford on avon (wiltshire)



PostPosted: Tue May 08, 2012 5:20 pm    Post subject: Reply with quote

yea i twisted my pump to advance the injector timing but cant say it made much difference on mine
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Nathaniel
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Joined: 13 May 2003
Odometer: 17901
Location: North, North Yorkshire


1979 Suzuki LJ

PostPosted: Tue May 08, 2012 9:59 pm    Post subject: Reply with quote

I have in the past wound the power screw out two turns before the MOT and back in again afterwards...

Its slow going on the way to the test centre!

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If You Open Your Mind Too Much Your Brain Will Fall Out
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RL12
Just got MTs


Joined: 22 Aug 2010
Odometer: 297
Location: Devon/Shropshire


1987 Daihatsu Fourtrak

PostPosted: Tue May 15, 2012 7:13 pm    Post subject: Reply with quote

cheers for the video parrot - that was ideal Cool

however do you know what adjustment can be made for a non turbo engine? (as there is no boost compensater so no diaphram etc)

have had to do a temporary engine swap and it feels like i'm driving a lawn mower lol. obviously a without a turbo its never guna drive the same but would like it to have a bit more poke.
(have bought a brand new milner exhaust which has helped)

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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Tue May 15, 2012 8:16 pm    Post subject: Reply with quote

RL12 wrote:
cheers for the video parrot - that was ideal Cool

however do you know what adjustment can be made for a non turbo engine? (as there is no boost compensater so no diaphram etc)

have had to do a temporary engine swap and it feels like i'm driving a lawn mower lol. obviously a without a turbo its never guna drive the same but would like it to have a bit more poke.
(have bought a brand new milner exhaust which has helped)



no problem Cool

the only thing you can do to a non turbo one is just turn the max power screw in abit but it wont give much more power without putting out loads of smoke

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timp
Winch Assistant


Joined: 01 Feb 2012
Odometer: 56




PostPosted: Wed May 16, 2012 10:02 pm    Post subject: Reply with quote

Went to adjust my pump today, took out the diaphragm only to find that the widest part was to the front Sad turned the star wheel 1/2 a turn, took the locking collar off the max power screw and turned it 1 turn and getting lots of black smoke Crying or Very sad

Not happy as to me it seems to need a bit more pulling power, it struggles with the mini digger behind it

btw Great video parrot Cool
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fingers92
Just got MTs


Joined: 21 Sep 2010
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Location: hindhead



PostPosted: Thu May 17, 2012 12:05 am    Post subject: Reply with quote

bit more boost should clear some smoke and make use of the extra fuel going in Very Happy
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parrotveasey81
Mud Obsessed


Joined: 13 Feb 2009
Odometer: 7480
Location: bradford on avon (wiltshire)



PostPosted: Thu May 17, 2012 4:58 am    Post subject: Reply with quote

timp wrote:
Went to adjust my pump today, took out the diaphragm only to find that the widest part was to the front Sad turned the star wheel 1/2 a turn, took the locking collar off the max power screw and turned it 1 turn and getting lots of black smoke Crying or Very sad

Not happy as to me it seems to need a bit more pulling power, it struggles with the mini digger behind it

btw Great video parrot Cool



thanks

as fingers92 has said more boost will help but first its better to fit a boost gauge as the trak should not struggle to tow

does it feel more powerfull now??
1 turn is alot to start with,i always say to do a 1/4 turn first then if thats not enough do another 1/4 turn.

how new is your air filter???

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timp
Winch Assistant


Joined: 01 Feb 2012
Odometer: 56




PostPosted: Thu May 17, 2012 12:34 pm    Post subject: Reply with quote

Thanks for the replies

I havent driven it much yet but It feels alot more responsive and appears to be pulling better.
I turned the power screw back 1/2 a turn for now.
Hope to get a boost gauge fitted over the weekend, I might put the star wheel and power screw back as they were and start again in smaller steps once I have the gauge on.

The air filter has about 5000 miles on it, I have a new one to put on it, another weekend job Wink

Do i need to drill the exhaust to can I hose clip a wire sensor to the pipe as near the turbo as possible?
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parrotveasey81
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PostPosted: Thu May 17, 2012 6:28 pm    Post subject: Reply with quote

timp wrote:


Do i need to drill the exhaust to can I hose clip a wire sensor to the pipe as near the turbo as possible?



Confused not sure what you mean Confused

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timp
Winch Assistant


Joined: 01 Feb 2012
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PostPosted: Thu May 17, 2012 7:13 pm    Post subject: Reply with quote

parrotveasey81 wrote:
timp wrote:


Do i need to drill the exhaust to can I hose clip a wire sensor to the pipe as near the turbo as possible?



Confused not sure what you mean Confused


Embarassed left half of that out
I am going to fit a temperature gauge to check the exhaust temperature Do i need to drill the exhaust to can I hose clip a wire sensor to the pipe as near the turbo as possible?
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parrotveasey81
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PostPosted: Thu May 17, 2012 7:17 pm    Post subject: Reply with quote

right so you want to fit a egt gauge
really it needs to be fitted as close to the head as poss so will be a manifold off job to drill the hole needed for the temp sensor

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timp
Winch Assistant


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PostPosted: Thu May 17, 2012 10:45 pm    Post subject: Reply with quote

Thanks
It will have to wait for a while so till I have a bit of time on my hands
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EnFlaMEd
Winch Assistant


Joined: 27 May 2011
Odometer: 94
Location: Adelaide, South Australia


1990 Daihatsu Fourtrak

PostPosted: Fri May 18, 2012 8:50 am    Post subject: Reply with quote

yo. I bought an EGT which came with a 1/8 NPT fitting. I drilled the hole (with lubricant) almost directly above where the manifold collector is that goes down into the turbo. Although its not recommended, I didn't bother with taking the manifold off. After I drilled the hole I stuck one of those flexible magnetic pickup tools down the hole to collect all the swarf. Spent a fair while getting it all out but I have had no adverse affect on my turbo since. Tapped it myself after. This is definitely a do at your own risk technique but it worked for me.
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