Jump to content
SAU Community

Recommended Posts

After peoples thoughts on RB26 Low-Mount manifolds. Im looking at using something as opposed to 100% stock items.

Im sure there is gains to be had there in conjunction with a various head work inclu:

Mild porting, Trust split dumps, cam gears (at this stage not going to use cams)

All the little things are going to add up hopefully to something a little better than expected ;)

I'll be using GT-SS turbos so around the 300-330rwkw mark.

Have people tried extru honed stock manifolds?

Ive got a little info already about UAS ones with the bench/flow testing done there, which seems to yield a gain on the bench, but how much as tested on a car... im not sure.

Alternatively, have people tried Aftermarket ones... ie the Tomei ones as an example.

They look the goods going from thier larger dimensions, but for a positivbe or negative effect?

The aim is to bring boost on as early as possible and make the new setup as responsive it can be

I'm just trying to work out which is better justified $$$ wise.

Stockers honed - $600

Tomei (or otherwise) - $1100

Any thoughts or products that havent lasted the distance that one should be wary of?

-ash

Link to comment
https://www.sau.com.au/forums/topic/94380-rb26-low-mount-manifolds/
Share on other sites

just my 2c about the tomei or larger diameter low mounts, if you want the best response then keep the runner diameter small in order to keep the gas vilocity high. faster the gas travels the harder it hits the turbine. but then you loose out on flow at the top end... sort of a catch 22.

;)

very true kwazza.. how much larger diameter are we talking?

how about the HKS stainless ones? im thinking of going an HKS stainless balance pipe type. Not cheap tho! could always go the UAS ones and weld my own pipe between them?

so whats the gist of the aftermarket stainless mani's? is it top end power more than response? or are they meant to have good response too?

HPI make some great low mount manifolds.I have used their SR20 manifold on my S15 and it made 20rwkw over stock at 4000rpm,7rwkw up top.I will be upgrading to the HPI units as soon as I can get Gerald to fit them cheaply lol

Yeah, it seems to be a grey area not really dabbled in "hugely"

but having it larger, would that allow more to flow, decreasing backpressure and making it more responsive?

Hmm.. seems a fine line. Not a lot of info about A/M ones unfortunately

i had hks low mount manifolds on mine with the highflow stock turbos, but unfortunately i did a few mods and changes so i couldnt tell the difference (turbos were stockies originally) in power/response. but i cant see any big differences in the different aftermarket brands, its a simple 3 into 1, which is str8 as, not like single turbo spagetti manifolds that can be good design or total shit.

the hks ones looked heaps better flow and smoothness internally than the stock ones thats for sure :D

i got em cheap second hand though, so i dont think id rush out and spend the $1500 or whatever they are worth new in a hurry B)

sorry it wasnt much help....

Brad

mm.. $1500 i cant justify.

$1100 i could... :(

Some places have what probably are china ones for $600-$700.

risky depending on the materials and grade/thickness of the stainless.

Hmmm... need to do more readings i do. Also i think the stocker (or non stainless) would keep temps down a tad also

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Yep, the closest base tune available was for the GTT, I went with that and made all the logical changes I could find to convert it to Naturally Aspirated. It will rev fine in Neutral to redline but it will be cutting nearly 50% fuel the whole way.  If I let it tune the fuel map to start with that much less fuel it wont run right and has a hard time applying corrections.  These 50% cuts are with a fuel map already about half of what the GTT tune had.  I was having a whole lot of bogging when applying any throttle but seem to have fixed that for no load situations with very aggressive transient throttle settings. I made the corrections to my injectors with data I found for them online, FBCJC100 flowing 306cc.  I'll have to look to see if I can find the Cam section. I have the Bosch 4.9 from Haltech. My manifold pressure when watching it live is always in -5.9 psi/inHg
    • Hi My Tokico BM50 Brake master cylinder has a leak from the hole between the two outlets (M10x1) for brake pipes, I have attached a photo. Can anyone tell me what that hole is and what has failed to allow brake fluid to escape from it, I have looked on line and asked questions on UK forums but can not find the answer, if anyone can enlighten me I would be most grateful.
    • It will be a software setting. I don't believe many on here ever used AEM. And they're now a discontinued product,that's really hard to find any easy answers on. If it were Link or Haltech, someone would be able to just send you a ECU file though.
    • Yes sir am asking is there possible way from aem tuner from wiring pins 
    • Have you checked cam to crank timing and confirmed balancer marks are correct?
×
×
  • Create New...