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Gtir Motorsport club » General Discusion » Gtir related Discussion » boost pressure 1 bar mod

boost pressure 1 bar mod

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1 boost pressure 1 bar mod on 26th October 2013, 9:12 am

pulsarmad20

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Hi all

I would like to know how todo it as i havent got the restricter and have silicon hoses ?? i did find somewhere i can use a mig welder tip and put in the line but wat size?

any help appriciated


thanks

sam

2 Re: boost pressure 1 bar mod on 26th October 2013, 10:01 am

GTI-R US

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Management
Management
try a 1.2mm tip thatll put you just fractionally over a bar

http://www.gti-r-us.co.uk www.force500.com

3 Re: boost pressure 1 bar mod on 26th October 2013, 11:49 am

pulsarmad20

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ok thanks bob will go buy one thiss afternoon thanks

sam

4 Re: boost pressure 1 bar mod on 26th October 2013, 4:07 pm

nomad

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Admin
Admin
You can still get the restrictor from nissan .... there is also a picture in the how to section under useful diagrams ..if that helps Wink

5 Re: boost pressure 1 bar mod on 26th October 2013, 7:52 pm

johnny gtir

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moderator
moderator
my local nissan said yes to supplying restrictor pipe untill they went to order it and could not get it. If anyone else knows different let me know please as i want one

6 Re: boost pressure 1 bar mod on 26th October 2013, 8:11 pm

nomad

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Admin
Admin
You got the part number for that johnny ?

7 Re: boost pressure 1 bar mod on 26th October 2013, 8:30 pm

johnny gtir

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moderator
moderator
Err pass did have a few month ago give me 5 mins

8 Re: boost pressure 1 bar mod on 26th October 2013, 8:42 pm

johnny gtir

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moderator
moderator
22320-54c00

9 Re: boost pressure 1 bar mod on 26th October 2013, 8:46 pm

nomad

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Admin
Admin
Thanks matey ...

10 Re: boost pressure 1 bar mod on 26th October 2013, 9:11 pm

nomad

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Admin
Admin
http://www.online-parts.co.uk/nissan/shopping_cart.php#.Umwr56O3Mb0

11 Re: boost pressure 1 bar mod on 27th October 2013, 8:54 am

pulsarmad20

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just realised that as i didnt have a restrictor pipe that i have only been running 0.5 of boost for the last year is that right ? and i thought that was quick lol coudnt get a 1.2mm tip had to get a 1mm and i have 0.8 of boost Smile big difference from before

12 Re: boost pressure 1 bar mod on 27th October 2013, 9:37 am

Mr B

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gtir technician
gtir technician
Just drill it out a bit bigger ...

13 Re: boost pressure 1 bar mod on 27th October 2013, 10:46 am

GTI-R US

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Management
Management
yep as above its only copper so easy to drill

http://www.gti-r-us.co.uk www.force500.com

14 Re: boost pressure 1 bar mod on 27th October 2013, 11:11 am

pulsarmad20

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im going to leave it like that as i dont wont to blow it up lol and 0.8 is alot quicker than before for me i know its nothing compared to what some of you are running but i like it and as its my only car i cant afford any more repairs this year!!!

15 Re: boost pressure 1 bar mod on 27th October 2013, 11:05 pm

Whytie

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Just buy a dewes device, they are cheap and work as they should

16 Re: boost pressure 1 bar mod on 28th October 2013, 9:29 am

fred05

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french connection
french connection
i don't understand, what is this restrictor pipe exactly?? scratch 

17 Re: boost pressure 1 bar mod on 28th October 2013, 10:38 am

GTI-R US

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Management
Management
its a lengh of pipe from the out take pipe of the plenum around 6'' long with either a green or mauve band round it. if you look inside the pipe you will see a plastic restrictor where the printed band is

http://www.gti-r-us.co.uk www.force500.com

18 Re: boost pressure 1 bar mod on 28th October 2013, 10:45 am

fred05

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french connection
french connection
aaaahhh ok! and the restrictor means higher or lower boost pressure regarding the size of the hole?

19 Re: boost pressure 1 bar mod on 28th October 2013, 10:48 am

GTI-R US

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Management
Management
yep that's correct

was an old trick years ago to run higher boost by fitting a mig welding tip in vacuum pipe to actuator which obviously works on -&+ pressure

http://www.gti-r-us.co.uk www.force500.com

20 Re: boost pressure 1 bar mod on 28th October 2013, 2:55 pm

fred05

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french connection
french connection
ok, so if i understand well, the little is the hole of the plastic part in the pipe, the bigger is the pressure?
do you have a chart or somthing with the hole size vs. pressure given?

21 Re: boost pressure 1 bar mod on 30th October 2013, 10:00 pm

johnny gtir

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moderator
moderator
@nomad wrote:http://www.online-parts.co.uk/nissan/shopping_cart.php#.Umwr56O3Mb0
Few days later mate

Unfortunately Nissan UK have informed us that this part number is no longer available. We can check for an alternative but would need the VIN/ChASSIS number.

22 Re: boost pressure 1 bar mod on 30th October 2013, 10:37 pm

nomad

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Admin
Admin
I think its the same as another nissan motor when i was checking ....

23 Re: boost pressure 1 bar mod on 5th March 2018, 11:05 pm

venom42

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Sorry to resurrect an old thread (seems that I what I have done every time I have posted?)... Based on the info here, I purchased a 1mm MIG tip to replace the missing restrictor on my car (it was running .5 bar when I got it). I am getting at least 1 bar with it (I back out of it before it gets there because I do not want to blow it up). .8 bar (or around that) is what I am comfortable running, as this is my daily driver and I do not want to modify the car more to run higher boost. There seems to be conflicting info on different threads here in the forums as to the appropriate size tip to use. Am I correct in understanding that the larger the hole diameter, the less boost you will run? Do I have that backward? Some of the other threads seem to indicate the opposite (a larger tip will lead to more boost). The only size that my local hardware store has in stock is the .8mm, so I need to order whatever size I need, assuming the 1mm tip I have in there now is the issue, and not something else (I have been thinking it was a failing boost control solenoid). Should I look for a 1.4mm tip, since some of the other posts seem to indicate that the 1.2mm yields just over 1 bar, or is it the .8mm tip that I want?

I am very close to just saying F it and going with an aftermarket controller set to 12psi (I like the innovate one with the integrated wide-band). I just really wanted to try and keep it mostly stock if possible.

24 Re: boost pressure 1 bar mod on 6th March 2018, 3:29 am

venom42

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After doing more research, it appears the stock restrictor is 1.7mm. 1.2 yields a little over 1 bar, so I'm hoping 1.4 will be about .8 bar.

25 Re: boost pressure 1 bar mod on 6th March 2018, 8:51 am

mike74

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I'm not sure on the prices of welder tips but, they can't be much more or less than the cost of a dawes device. I've got one on my R and it performs faultlessly regardless of what boost you want.
At least then you could set the boost to whatever you want very easily...
one of these:
https://www.ebay.co.uk/itm/TURBO-MANUAL-BOOST-CONTROLLER-BALL-AND-SPRING-VALVE/220537042109?hash=item33590834bd:g:CYkAAMXQDnpTYh-Q

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