Jump to content
SAU Community

Dissapointing Dyno Results

d.matho

By d.matho,
in Forced Induction Performance

 Share

Recommended Posts

d.matho Contributor

d.matho

Posted
Posted (edited)

Hey guys,

just got a nistune for my r34 gt-t pretty bummed about the dyno results. i havent got the sheet yet but spoke to the tuners, ill post the sheets when i can.

rb25 neo det

Hi-flowed turbo - stage 2 from mta gold coast

3" exhaust from turbo back

840cc denso injectors

z32 afm

walbro 255

blitz se return flow intercooler

spitfire coil packs

gfb respons BOV

Greddy OLED ebc

car got 290hp at 14 psi, apparently the car was still pushing but the waste gate was opening at 14psi and wouldnt' let it go any further.

Just kind of bummed out after readying other guys getting around 220kw - 240kw with roughly same mods.

next step is to get an HKS 14psi actuator and run more boost, when I've got more money haha.

ill post some sheets when I get them tomorrow, but for now what do you guys think?

Edited by d.matho
Link to comment
Share on other sites
d.matho Contributor

d.matho

Posted
  • Author
Posted

hahah yeah I know, I need to take it for a drive. Apparently the power curve is wicked and it can keep climbing once I've got a new actuator, I guess the end goal is to run around 18-19psi eventually. an HKS heavy duty actuator should fix it.

Link to comment
Share on other sites
Trex Grand Master

Trex

Posted
Posted

So it made 216 kW, which is 4kw short of what you were hoping for, and you still haven't actually driven the car?

You actually have nothing to be upset about yet

That power on a turbo of dubious "highflowness" and on 14 psi is not disappointing at all. It's only 14 psi!

These ^^

Link to comment
Share on other sites
d.matho Contributor

d.matho

Posted
  • Author
Posted

Do you mean the EBC wouldn't let you run any more boost? Or the wastegate actuator itself?

the wastegate itself opens at like 14 the ebc can hold way more. I thought the job of the ebc was to stop the wastegate seeing its max till youve reached the amount of boost you want?

Link to comment
Share on other sites
GTSBoy Grand Master

GTSBoy

Posted
Posted

A boost controller can bleed off some of the signal that the actuator sees, allowing you to increase boost above what the actuator is natively sprung for.

BUT......

There are limits. You can't use a bleeder to boost a 5psi actuator up to some much much higher setting like 15 psi (for example and using made up numbers). You can't usually go much higher than about double the native setting of the actuator. Having said that, I have a 5 psi actuator on a Neo turbo that is bled up to 11 or 12 psi.....so you certainly can go more than double. The question is just how much more. Anyway, the reason for not being able to arbitrarily wind up the boost is that the boost controller can't bleed off enough boost to raise it infinitely AND retain ability to control it with good response. On top of that, the exhaust manifold pressure will push the wastegate flap open against the weak spring of a low pressure actuator no matter whether the boost signal is completely disconnected or not!

So in your case, without us knowing what pressure actuator you have, it could be either or both of a couple of causes.

Link to comment
Share on other sites

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • klutched
      GOT SUM's RB34

      By klutched · Posted

      Got some decent progress after work yesterday and also today. Got the ECU all wired and passenger side interior all back together. Kept the wiring up nice and high to avoid people standing on it. Got the surge tank relays rewired and tidied up the pump wiring and cut a hole to bring the cables through.  I found a spare USB cable I had lying around so I decided to cut it up and see if I could use it for my CAN 1 bus. Turned out one of the pins I needed was to the shield of the cable so i cut it up and desoldered it and resoldered to the correct pins.  Had the issue with the powersteering hose hitting the A/C compressor and fan shroud. I pulled the bracket off and modified it to remove the front mounting point which now clears it all. Will keep an eye on it to see if theres any signs of fouling once it's up and running.
    • hardsteppa
      R32 OEM rims name?

      By hardsteppa · Posted

      That's some good input mate. Nice.
    • PranK
      My BMW 335i

      By PranK · Posted

      So today I went well outside my comfort zone (again) to replace my valve cover gasket.  I have had a big leak over the exhaust leading to a lot of smoke and smell every time I drove it. The leak was in the rear driver's corner.  The job wasn't hard as such, just a bit finicky and time consuming.  The old gasket was rock hard and broken right where the leak was.  The leaky corner had so much sitting oil in it.  The good news to my amateur eyes was no buildup or sludge under the cover. It all looked fairly nice in there.   I haven't started it yet. I ran out of light and body when putting the coils and injector loom back in. Probs only 30min left for the morning.  I was so nervous putting the cover back on, I must have lifted it 5 times to make sure the gasket was still seated properly. God it's going to be nice to be leak free and not make other traffic light queuers think my car is about to explode.
    • The Bogan
      MLR's Bogan cruise ship

      By The Bogan · Posted

      Gave the Mazda it's first wash, it will need some clay, a light compound, and polish polish to remove a few swirl marks, but that will be a job for when I have a full day to get my DA polisher action on
    • Jonesy93
      R32 vs R33 R34 C34 heater core matrix and elbow pipes info thread

      By Jonesy93 · Posted

      Just did this job on my 32 with the boost doc kit. was quite simple to fit, hardest part was getting the rubber bungs back on the firewall. does anyone know how the heater will work now without the flap in the bend? Will I just have a heater on 24/7 now?
×
×
  • Create New...