Jump to content
SAU Community

N1 Turbos Laggy

mattblack

By mattblack,
in Engines & Forced Induction

 Share

Recommended Posts

mattblack Enthusiast

mattblack

Posted
Posted

hi all,

I recently had a PFC installed and retuned on my 32 GTR. Was previously running an eManage making 285rwkw and was getting around 420km per tank city driving.

With the PFC install the tuner leaned the tune out a little and got 311rwkw but now im seeing 320-340km per tank with very similar driving patterns.

Another situation im baffled with is the lag. Im getting full boost by 4600rpm with N1 turbos :) . Mods include 3.5Inch exhaust from front pipes back (std dumps), std internals, std cams, cam gears, Sard FPR.

Can anyone suggest some reasons why boost is coming on so late and fuel consumption is so crap now.

thanks heaps

Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/
Share on other sites
rtune Experienced

rtune

Posted
Posted (edited)

in these situations you have to ask.. what changed.

From your description the only thing that changed was tune and possibly cam gears.

therefore unless (by sheer coincidence) your car developed a new problem right when the tuner had it, it must be the tune.

Did you get full dyno graphs before vs after including one showing AFR?

And btw your original power and consumption was very good for the mods you have, so I wonder what you were looking for in going PFC.

Edited by moneypit
Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/#findComment-4548646
Share on other sites
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Was it laggy before the ECU Change?

If so, its either actuators need upgrading/modifiying to hold shut

Or

They might be N1's with a .63 rear on each, if so then 4600 is as good as it'll get.

Otherwise the economy - probably related to the tune

Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/#findComment-4548774
Share on other sites
mattblack Enthusiast

mattblack

Posted
  • Author
Posted

i changed to the PFC as im going to slowly increase the number of mods to the engine and was told the PFC is a better platform to do this. I got a good change over price too.

the car was laggy before as well. I will post up dyno graphs. The N1s are the factory fitted turbos on my car, its a genuine Nismo 32GTR so not too sure of the exhaust size.

Im thinking of fitting some Tomei Type A cams and dump pipes then getting a retune. what you think?

thanks for the advice so far.

Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/#findComment-4548837
Share on other sites
R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Factory R32 N1 turbos are fairly lagy so thats about right, they are old design non ball bearing turbo...

Agreed :) Im not sure of the requirements/how/what setup they came on in the .63 either.

But ye, R32 N1's are the pits, hence R33s are better, and R34 N1's are the response monster for around the same power

Perhaps some more playing with the cam gears as if its stock housing N1's thats still a bit poor.

IMO cams wont give you much vs the $$$ you'll spend if at all.

Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/#findComment-4549076
Share on other sites
  • 3 weeks later...
Duncan Grand Master

Duncan

Posted
Posted

hi mate did you get anywhere with this?

I run the same turbos unfortunately and they are pretty bad. but with cam gears set right and a good tune you should be able to bring the boost on a bit sooner, mine is about 4000 for full boost which is still noticeable lag.

only real concern with your setup would the standard dumps. the rest of your exhaust is good but the standard 32 dumps are woeful and would not be helping at all.

Link to comment
https://www.sau.com.au/forums/topic/266540-n1-turbos-laggy/#findComment-4584655
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

    • Murray_Calavera
      R33 GTR running -9 with no tune

      By Murray_Calavera · Posted

      I don't understand how this hasn't boiled down to - Upgrade the turbo when you have everything required. ECU, injectors, fuel pump, turbo, etc. Do it all at once.  If you don't have everything required, just enjoy the car as it is and keep saving up your pennies. 
    • Duncan
      R33 GTR running -9 with no tune

      By Duncan · Posted

      Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Duncan
      New kid on the block

      By Duncan · Posted

      Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Duncan
      Coolant leak?

      By Duncan · Posted

      Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • GTSBoy
      Coolant leak?

      By GTSBoy · Posted

      I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
×
×
  • Create New...