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Rb25 Det Neo Safe Boost Presure

Addicted2BoostR34
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Addicted2BoostR34 Proficient

Addicted2BoostR34

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Posted (edited)

every one has diff ideas on safe boost for a rb25 det neo :thumbsup:

my car mods are

the HKS gt-rs turbo kit

steel head gasket

head re-grind

full top end stud kit

hks timeing belt

pro cool intercooler

hks pod filter

440 fuel pump

full engine flush

new belts all around

hurricane custom 3inch sports exhaust ( cat and cannon )

after market radiator

split fire coil packs

hks elec boost controller

if i remember the other mods ill post

but im lookn at running about 15 psi on high and maybe 12 low waiting too see what the lowest the actour can handle

any help would be nice about this subject ((( or should i just run like 13 daily)) :unsure:

anyone whith this kit let me know what ur running and mods

Edited by Addicted2BoostR34
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Shazza24 Proficient

Shazza24

Posted
Posted (edited)

The safe boost level that you are probably referring to, is if you have standard turbo....

After that is replaced with after-market turbo(steel wheels) the problem is now safe power level for engine output (kw).

May as well tune & run 20psi(or whatever the highest boost efficiency range is) , then use your right foot to achieve desired boost.

Edited by Shazza24
PM-R33 Grand Master

PM-R33

Posted
Posted

Boost pressure has nothing to do with "safe limits" on an engine.

10psi from a T28 is a lot different to 10psi from a T88.

As has been said, the only reason people refer to safe limits of boost pressure is on the stock turbo.

Your HKS actuator on the GTRS is a 1bar item so the minimum it will run is 1bar. They run out of puff at around 19-22psi dependent on engine.

But +1 on what ECU are you running? Please don't say stock.

Addicted2BoostR34 Proficient

Addicted2BoostR34

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  • Author
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stock ecu pinch.gif as im still not sure wat one to get my tuner would like me to get the vipec ecu.. but i like the Fcons with hand controller :pirate:

maybe even a nistune ?:S

as for fuel pump i ment the 040 in tank fuel pump

the 440 is the inline version

injectors are stock as im going to do them at the same time as the ecu

my plan was to get the gt-rs turbo on run it at min bar ..

get the head cleaned up

upgrade the pump

timeing belt exc

get some forged items in her belly :) do supporting things water / oil pump then once thats all done lookn into tuneing and injectors 2 match

i drive this car f*k all its a long term thing for me

75coupe Grand Master

75coupe

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Posted

the 040 pump will be fine for the gtrs, the 044 is the external pump your thinking of...

the vipec ecu seems good from all accounts and so is the nistune but the Fcon is harder to find a tuner for Ive heard, if you want a hand controller go the powerFC, but at the end of the day get what your preferred tuner has the most experience with and recommends...

you say you have 'hurricane custom 3inch sports exhaust ( cat and cannon )' tell me you will have a 3 or 3.5" dump as well....

I wouldnt even worry about a pod filter just run the std airbox with a decent hiflow panel filter or an arc airbox... pods are ghey imo.

Im assuming you meant 'cooling pro intercooler'... yeah.? never heard of a pro cool one...

with injectors keep in mind that E85 is around more and more and to run it you need 30% more fuel flow, more power, less detonation more timing...

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Yeah ECU first pretty much in all instances.

Without it, forget running more than 7-9psi as the ECU will simply have a fit, not to mention you need injectors.

Have you even read the "what mods to do first" thread?

The RB25 dyno sticky?

You'll soon notice if you read every GT-RS thread, what the minimum requirements are.

Addicted2BoostR34 Proficient

Addicted2BoostR34

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  • Author
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the 040 pump will be fine for the gtrs, the 044 is the external pump your thinking of...

the vipec ecu seems good from all accounts and so is the nistune but the Fcon is harder to find a tuner for Ive heard, if you want a hand controller go the powerFC, but at the end of the day get what your preferred tuner has the most experience with and recommends...

you say you have 'hurricane custom 3inch sports exhaust ( cat and cannon )' tell me you will have a 3 or 3.5" dump as well....

I wouldnt even worry about a pod filter just run the std airbox with a decent hiflow panel filter or an arc airbox... pods are ghey imo.

Im assuming you meant 'cooling pro intercooler'... yeah.? never heard of a pro cool one...

with injectors keep in mind that E85 is around more and more and to run it you need 30% more fuel flow, more power, less detonation more timing...

yer 3" turbo back

pod was on it wen i brought it was thinking a nice metal fab'd one

and it would be 'cooling pro intercooler' that was allready on it wen i got it too ...

vipec it is i need to sell my bike and it will be done !!!

(injectors will be done wen ecu gets done ) so i will prob drive it like twice after the turbo goes on

i hae tryed 2 look for posts about the vipec but the button wont let me look it wont even find skylines pinch.gif

Addicted2BoostR34 Proficient

Addicted2BoostR34

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Posted

If your tuner wants the Vipec then go for it. Fantastic ECU and you will not be dissapointed.

Don't worry about half the stuff you listed that you want to do. Get the injectors and ECU done first.

its all done once i sell bike ecu and injectors :)

YZF400 any1 keen :P

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