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Safe Boost Levels With Standard Afm & Injectors

DaveO74

By DaveO74,
in Engines & Forced Induction

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DaveO74 Mentor

DaveO74

Posted
Posted

Hi everyone,

This may sound a bit silly but here goes.

My Rb25 Turbo (R33) is at Hypergear getting the highflow (ATR28G3 450hp) work done and Im getting a 14psi actuator installed as well, As I have not yet got a Z32 AFM or injectors and I was wondering what a safe level of boost would be until I can get these extra bits.

I am still going to drop it down to CRD for a tune once the Turbo is back and I have most of the supporting mods but Im unsure wether I should leave the boost set at 15psi or lower it until AFM and Injectors can be put on.

I know i should have probably got the AFM & Injectors first but the stuffed Turbo was unexpected (And Untimely!)

Im curently running 217rwkw@15psi with standard Turbo

Mods are as follows:

Hybrid FMIC/ Apexi Super suction kit/Custom Air intake and box/Split Dump pipe/HKS 3.5" Cat back/Catco Metal cat (1016cfm I think)/Greddy EMU/Profec Spec B EBC/And as of next week High flow turbo

Any views?

Ta

and3_3 Proficient

and3_3

Posted
Posted

Standard gtst AFM have a air resolution to 220 rwkw, so if you are making 220 rwkw on 10psi with the highflow then 10psi is all you should run.

As for your injectors 220 rwkw is also safe for them, anymore and your just asking for trouble. Think of it this way, its cheaper to upgrade your injectors before running higher boost than replacing your motor because it wasnt getting enough fuel.

l0WRB Mentor

l0WRB

Posted
Posted (edited)

should be right on your after market ecu. ( get tune once u upgrade rest of ya stuff )

i blew my motor up (4 cracked pistons) on my slide hi flow on stock ecu on 16psi after a few months..

Edited by l0WRB
geraus Mentor

geraus

Posted
Posted

Hey therre i just got my highflow as well same as you! im running it on now with stock AFM stock injectors @ 1bar. It runs pretty good! but there are some flatspots . I will get a tune soon with my PFC.

DaveO74 Mentor

DaveO74

Posted
  • Author
Posted
im running a safe 307 rwhp (229kw) on 11 psi on my highflow until i get injectors and ecu. using a safc2. knock only going to 17-20 on a hot day but sitting on 0 when driving. my dyno

post-24566-1234664695_thumb.jpg

Hey Pal are you still running stock AFM or Z32?

Also what size injectors do all you peeps recommend, 555's or 740's ?

I should be able to get the Z32 in a week or two but the injectors may take a little while

a31lunacy Proficient

a31lunacy

Posted
Posted

just save up and do both at the same time, another option is s15 injectors i was running them and they are good for around 280 rwkw no worries i just sold my set for $450 as well so they are a good value upgrade. z32 can be had for around 150 -200 so in all for around 600 + 200 for re tune you should be sweet just keep an eye on the for sale section. i think there is another set going for around the same price.

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