Jump to content
SAU Community

Acceleration Issues With R33

master_illusion
 Share

Recommended Posts

master_illusion Apprentice

master_illusion

Posted
Posted (edited)

Hi,

I have had a bit of a search but to no avail.

I have just had a new motor put into my 1994 R33, and the problem is that after about 1/2 throttle, there doesn't seem to be anymore poke from the motor. It just keeps accelerating as if it was still 1/2 way down.

It still sounds like its boosting but it just accelerates really slowly.

The motor is still on very low boost, but doesn't get over about 3 psi. As long as you keep the throttle below 1/2 it seems to pick up okay. But still doesn't boost over 3psi.

Any idea's??

Regards

Master_illusion

Edited by master_illusion
Link to comment
https://www.sau.com.au/forums/topic/127601-acceleration-issues-with-r33/
Share on other sites
RANDY Veteran

RANDY

Posted
Posted (edited)

So... if you rev the thing in neutral, does the motor spin up with the foot all the way in? If it does, then your TPS and throttle cable is OK.

Does it idle OK? If it does, then you might not have a boost leak. Still, some leaks open up under pressure, so recheck and retighten everything.

If those are fine, i'd start looking at your boost actuator, check that there are no blockages, and that it's plumbed up correctly to the intake pipe and wastegate actuator. EDIT: If it was blocked or not working, I think you'd get the factory 7psi or whatever the wastegate is rated for... so maybe just bypass the controller just to test. (keep an eye on boost, don't overdo it)

Then, maybe check, that your BOV or wastegate isn't stuck open or something.

It rather sounds like the turbo isn't generating more than 3psi... i'm sure it would be sluggish at 3. Whether it's because of any of the above possibilities, I dunno. Check them out, one by one...

Edited by RANDY
mad082 Grand Master

mad082

Posted
Posted

could be that the turbo is cactus. if it has been thrashed the exhaust wheel might be damaged which would explain why it isn't boosting.

as has been said check the wastegate isn't sticking open, check that the bov isn't stuck open, if you have a boost controller on it take it off and just run the hose straight to the actautor. sometimes the controllers get blocked and don't release the air between it and the actuator so the wastegate stays open.

master_illusion Apprentice

master_illusion

Posted
  • Author
Posted

There is no boost controller attached. It did have one but they have removed that while the motor is running in. Also the bov, has had a plate put over it so it passed the requirements. I have just brought this car. Could it be to do with the fuel filter, I have still not checked that, but could that also affect the overall total boost, as it is in relation to the acceleration problems??

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

    • Just_a_datsun
      RB26 block, rb26 head

      By Just_a_datsun · Posted

      Block bump. $400. As above cyl 6 needs bore or sleeve.
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      I would think making the argument that the travel is limited by a spring flexing against a spring perch as "the same method". Later on in the document they do state that the spring can't bind on full bump travel and cannot come loose in full rebound travel as well. (which is all very sensible). The laws are actually pretty sensible and reasonable. It's just that the people who enforce and check them don't actually read them or know them accurately. "Oh, coilovers? Instant fail mate. Don't even need to look at it." - Guy who will be instantly reported by me. There is probably merit to people who do get defected for height also get defected for the suspension in that state that allows it. I did never consider the people who are complaining about coilovers being picked on are also running around at 50mm off the floor.
    • Kinkstaah
      Ethanol Content Sensor - Always at 11%?

      By Kinkstaah · Posted

      I think given SAU's knowledge of E85 we can strongly conclude that 10% ethanol in almost any situation is entirely fine. Almost all of the myths against E85 were overblown, let alone E10.
    • The Bogan
      Blue slip

      By The Bogan · Posted

      From your link See bold text, is this referring to damper settings, if so that may a issue for "some" inspectors, I cannot see aftermarket coilovers having the evidence that "must be available that its functional performance is equivalent to the original" Maybe just remove the adjustment knows and hope for the best???? Meh 5.2 Suspension travel In all instances, modifications to a vehicle’s suspension must ensure the integrity of the system and not compromise the ride quality. At least two thirds of the original suspension travel should be maintained in both directions (rebound (i.e. extension) and bump (i.e. compression)), and rebound must be limited by the same method used by the vehicle manufacturer or if this is not practicable due to the nature of the modification, an equivalent method. If an alternative method is used, evidence must be available that its functional performance is equivalent to the original.
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      They actually don't - They adhere to VSB14 rules just like Victoria. The rules are against CABIN adjustable height, and it quite clearly states that the height has to be within parameters. I asked the VASS engineer to confirm this when I got my car engineered and they refused to engineer the coilovers because they didn't meet the requirements for requiring engineering. (mine are height adjustable.) People "Not wanting to bother" with "Actually reading/knowing/adhering to the rules" should result in fines and immediately losing the ability to issue blue slips and/or RWC's in Vic.
×
×
  • Create New...