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| cant get over 10 psi !!! |
| jarred | Posted @ 05 Jan 2008, 1:17pm |
Member
Posts: 18 | hay for all u brainy people my rb30et want get over 10 psi !!! could it be that im running a n/a computer and airflow meter ??? would that stop it geting over 10 psi ?? any help would be awsom thanks !!
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| #823 |
| makka84 | Posted @ 05 Jan 2008, 6:43pm |
Member
Posts: 190 | Most likely ECU,the N/A will allow so much before they start to govern(not allow)because the N/A and VLT ECU are different,i know this coz i had to prove it to one of my apprentices,airflow meter i doubt as much.
If your using a standard t3 check the adjustment on the wastegate,go to a competent tuner to do this as you need a dyno and knowledge to do this as i have have people come in my shop with similar symptoms.
Did you just bolt a turbo on an N/A motor?
Tell us what you've done so far so we can help you out.
Cheers
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| #832 |
| jarred | Posted @ 06 Jan 2008, 8:43am |
Member
Posts: 18 | hay man thankyou very much 4 the answer,umb nope oridgnal turbo engine,but oridgnal owner bluw up the t3 turbo or maybe took it off wen i brought it and he put a 300zx turbo on it umb....garrett A/R 48 if that rings any bells its a tiny turbo could that b da reason ?? but the cars mods include..
2.5" exust from dump pipe
600x300 frontmount intercooler
b.o.v
fuel preasuer regulator
38mm external wastegate
plugs,leads, ect
thankyou
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| #833 |
| eric richardson | Posted @ 06 Jan 2008, 1:58pm |
Member
Posts: 36 | yes turbo probably is the reason as we have already talked about.this turbo is designed to be used as a twin set up not individually.... even if u could run more boost i doubt it would make much more power as the turbo is already undersized and working too hard. also i didn't realise that those particular turbos run external wastegate?
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| #834 |
| MICHAEL | Posted @ 06 Jan 2008, 4:38pm |
Member
Posts: 241 | i dont know if its relevant but the rb30 and jap motors are fitted with an overboost fail safe device they are located on plenum chamber just right of the throttle body. looks like a round brass plug.they will open from 8-10 psi limiting boost to 10 psi they unscrew an can replace with a bung plug from hardware or plumbers. hope that helps
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| #836 |
| jarred | Posted @ 06 Jan 2008, 6:12pm |
Member
Posts: 18 | hay there thanks all umb lets get started yes michael my car at the moment dose have that round plug,and from what i no it dose work,i always just thought it was the factory blow of valve or somthing lol ill take that off some time and see what it dose,thanks
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| #837 |
| jarred | Posted @ 06 Jan 2008, 6:24pm |
Member
Posts: 18 | umb hay eric the turbo wasnt externly wastegated i put the external on cause im a suker 4 the sound lol,umb because im from newzealand looking for a vl t3 turbo is inposbile but in my shed i do have a rb20det turbo i could bolt up to my rb30et that should b a hole heap beter ae ?? if this helps my boost gague neddle flutters on and of the 10 psi number if that helps with anyfing and car dose not cut out on 10psi it just want go over,i even free boosted it 1 day and still 10 psi lol and na wen i got the car it was runnong 6 psi and even wit boost on 10 it still not dat much faster a
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| #838 |
| MICHAEL | Posted @ 06 Jan 2008, 7:36pm |
Member
Posts: 241 | i would start with the overboost plug that should do the trick mate if you need a pic of mine let us know and i will send you one you have done really well to run that much boost on n/a ecu injectors mate
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| #843 |
| jarred | Posted @ 07 Jan 2008, 9:29am |
Member
Posts: 18 | ok yip cool as umb thanks michael and ild love some pics of your vl would b awsm "cruz_club@hotmail.com" and from what i no i thnk the injectors are turbo ones i thnk its just a n/a ecu and afm a but u never no,im thinking of puting a t3 turbo rb20det turbo on my 30et how u think that will perform ??
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| #845 |
| MICHAEL | Posted @ 07 Jan 2008, 4:47pm |
Member
Posts: 241 | as long as it bolts up to the t3 flange that turbo should be good enough all though a turbo with external gate would be better for running higher boost.
air flow meter does nothing but measure the air and tell the computer you CANT adjust them
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| #846 |
| Posted @ 07 Jan 2008, 7:05pm |
Member
Posts: | man while u have it off get it hiflowed... that way when u do put it in u've probably made about 100hp (literally) extra and u know it's going to last ages hopefully. and despite what michael says u can adjust air flow meters by intercepting them..... this would be awesome for ensuring your na motor has the right fuel to avoid detonation and making deccent power.
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| #857 |
| MICHAEL | Posted @ 07 Jan 2008, 8:57pm |
Member
Posts: 241 | maybe you can calibrate the air flow meter but i was told not too touch them as they are preset? i learnt the hard way. good idea to rebuild the turbo if it has been sittting around for months she might be a bit smokey.
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| #864 |
| jarred | Posted @ 08 Jan 2008, 2:12pm |
Member
Posts: 18 | yea na wouldnt wanna touch air flow meter ae lol,umb the turbo was off the car and in my shed for 3 months so should b ok a the turbos mint no play in turbo and didnt smoke so dats good ae,and im still going to run the turbo with my external wastegate and mayb run 12 psi dose that sound good ??
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| #865 |
| MICHAEL | Posted @ 08 Jan 2008, 2:51pm |
Member
Posts: 241 | 12psi sounds allright what can you wind it too?from what i know you need to operate the turbo often when a turbo has not been used for a while the seals go hard and they blow smoke out the exhaust
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| #877 |
| jarred | Posted @ 09 Jan 2008, 9:12am |
Member
Posts: 18 | and im not to shore what i can wind it up 2 yet i havnt takn that big bolt out yet in the manifold a but yea hoplfly the seals havnt gone hard but will have to see as i will put it in when i get some money !! do u no what injectors line up and are bigger and better for a rb30et engine ??
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| #879 |
| MICHAEL | Posted @ 09 Jan 2008, 6:41pm |
Member
Posts: 241 | standard turbo injectors are good but if you want bigger injectors you will need aftermarket ecu to run them.
you can get larger o ringed fuel rails to fit larger and more types of injectors.
i have a set of 380cc injectors to replace the stockies when i can get to the dyno as i only have a powerchip.
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