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My R33 Goes Faster On 10 Psi Than It Does On 12psi

zafeniak

By zafeniak,
in Engines & Forced Induction

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r33cruiser Grand Master

r33cruiser

Posted
Posted (edited)

FINALLY THANKYOU MAN FOR A RESPONSE.

im going after 600hp. and if i get more. its a bonus.

DONT worry about internals (springs, pistons, sleeves, rods, solid lifters,crank, valve stems/guides./fuel supply (squirters, pump/s), electrics etc.

im just wondering what size turbo would get me there that comes on boost below 4000rpm if possible.

if possible, a snail that gives me breathing room to go further if i ever want to..

but for now 600-700hp snail is what im after.

i was thinking a US-spec super t70

Edited by r33cruiser
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Kaido_RR Grand Master

Kaido_RR

Posted
Posted (edited)
FINALLY THANKYOU MAN FOR A RESPONSE.

im going after 600hp. and if i get more. its a bonus.

DONT worry about internals (springs, pistons, sleeves, rods, solid lifters,crank, valve stems/guides./fuel supply (squirters, pump/s), electrics etc.

im just wondering what size turbo would get me there that comes on boost below 4000rpm if possible.

if possible, a snail that gives me breathing room to go further if i ever want to..

but for now 600-700hp snail is what im after.

i was thinking a US-spec super t70

you have a few opinions

HKS T51R SPL

HKS T51R KAI

HKS T04Z

Blitz K5 or K6

Trust T88, T78, td06

etc etc....

i would look at a hks or garrett T04Z, size it up to how much power you want so you can select the correct rear housing size, not sure if you will be full boost under 4000rpm :happy: check out this topic : http://www.skylinesaustralia.com/forums/Rb...yno-t55845.html

its got alot of information of different types of turbos on rb25, also cams will affect lag etc...

Edited by [Michael]
  • 2 weeks later...
GriMo Contributor

GriMo

Posted
Posted
how come ive heard of skylines running 12 psi with only a cooler and exhaust?

The stock turbo is fully capable of making 12 psi, infact likely much more then that [ ive accidently hit over 15 on mine :) ] . However the life of the turbo is much reduced when running levels of boost higher then it was ever designed for.

IE you can do it, you prob just wont be able to do it for very long.

without some form of modification to the standard solenoid or some other form of boost controler, im not sure how just an exhaust and cooler would cause 12 psi?

r33cruiser Grand Master

r33cruiser

Posted
Posted (edited)

taking the stock ceramic/nylon wheeled turbo past 10-12pound is inefficient.

the ceramic wheel was built for response not power.

it will simply not be efficient at these levels.

it doesnt have the mass to sustain the boost levels past 12pound

Edited by r33cruiser
avrahan Collaborator

avrahan

Posted
Posted
Its because you're running less backpressure and hence giving you more power ... the more psi you boost it up to means more turbo lag... I wouldn't say you go faster - more so less lag... if that makes sense.

arent we in the forced induction section? or is this the v8 section??

ahaha so stupid...

  • 2 weeks later...
zafeniak Enthusiast

zafeniak

Posted
  • Author
Posted

WOW my topic is still open!!! WOOT WOOOOOO!

Anyway, I purchased myself a Power FC, brand new one from ebay for $1,540 with 1 year warranty and invoice, not bad considering second hand ones still sell on ebay for $1,300!

I haven't gottent around to installing it yet, however, I am sure it'll fix my problems!

I also got an a brand new Apexi NEO that I am selling if anyone is interested ($320)

I want to upgrade my fuel pump, does anyone have any suggestions as to what I can get, and how much itll cost me including installation, fiurthermore, will I see an Increse in power from it?

CHeers ladz

zafeniak Enthusiast

zafeniak

Posted
  • Author
Posted
don't know anything about safc but if it works for GTT R34...ill take it for $250 :D

Dude, they are selling on ebay for $400 without postage cost.

ANd yes it will work for you R34. In addition, I also got a genuine apexi stand for it which I will throw in for free.

r33cruiser Grand Master

r33cruiser

Posted
Posted

here ya go mate... depending on your power needs the bosche 040 is perfect for your needs and can sustain 400hp.... from memory it is about 200-300 bucks...

it has a filter in it...so its a direct replacement. just put it in the harness...then slide it in.

tm_r33 Experienced

tm_r33

Posted
Posted

Yer bosch 040 are a good little pump.. although you could get the new walbro pump that is still intank but flows as much as an external bosch 044.. about 600hp from memory... haha although this would be overkill for you, so 040 IMO

green 33 Explorer

green 33

Posted
Posted
Yer bosch 040 are a good little pump.. although you could get the new walbro pump that is still intank but flows as much as an external bosch 044.. about 600hp from memory... haha although this would be overkill for you, so 040 IMO

I would reccomend the bosch over the walbro, i had the walbro and it shit itself in less than a year, also had a mate that had one and it died too.

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