Jump to content
SAU Community

Recommended Posts

Hey guys

Well having dramas again with unsure weather its the AFM meter again or not? I had no pod on the AFM meter before and killed the AFM (totally my fault) an now I have a pod adapot and a pod filter on it, you go to plant your foot down and I hit around 5000rpm and it's like the brakes ate being slammed on, pulls right back at me? Any idea what this is caused by? I am goin to put the standard air box back on but my other recent turbo cars I have done this and never had any issue with it? Also I blocked the bov of to make it flutter also any problems with doing this or anything? Let me know guys?

Regards

Matthew :)

Link to comment
https://www.sau.com.au/forums/topic/384374-stagea-5000rpm-problems/
Share on other sites

What model stagea? How much boost? Etc...

The first thing that comes to mind is airflow cut. If its a C34 S2 you could also be hitting the factory overboost protection.

Blocking the BOV will only cause stalling when backing off, it's a pain in the ass with an auto. If your not getting any stalling then don't worry about it. The only other things is you will get the occasional backfire.

Ive read somewhere on here that there's a glitch in the standard ecu map between 4500-5000rpm

yeah there is, not really a glitch but more like a big dip in the timing. if your hitting those cells it will feel like a flat spot in acceleration, and the more airflow or boost you run on the stock map the more you will feel it.

Also it's a standard boost m35 2003 model no mods done at all apart from pod and it doesn't like it lol

Hi Mathew,

factory airbox is way better than a pod, as I guess you've worked out, lol. You can get them to work, but why bother when the airbox & standard filter will flow more air (& colder) at negligible restriction than the engine will most likely ever need.

Cheers, Leon.

I've got a pod on mine. Required nothing to get it to work, just a filter adaptor for a 350Z.

Leon, when you say an airbox and standard filter will flow more air, have you tested it? On mine I had a significant increase in AFM voltage on the informeter when I put the pod on. Somewhere around 0.5V (which I thought was a lot when it only goes up to 5V, works out to 10%). Considering I had a Blitz panel filter and the powerduct cover removed I wouldn't have thought it would have given me that big an increase.

Temps seem ok too. Intake temp while moving is typically around 30 degrees. While stationary you do get some head soak depending on the ambient temp and how long you're sitting there, but when I complete the setup I'll put some head shielding up.

Mine has no issue, but the injectors were maxing out before the ECU rejiggered itself. I only had the pod, no suction pipe.

The only difference I can think of is the dump pipe and exhaust? I had all mine done by then.

What kind of pod are you using Matthew?

Yeh i do not want to use the standard air box becuase with the pod it spools up so much louder, seems alot less restricted and temps still seem very good. I think i may have worked out the problem, i made my own custom pod adaptor (boilmaker) and i used 75mm piping. but it was 80mm long, like went like 80mm inside in the pod, so i think it was restricting the air flow in, so by cutting it back to like 30mm it will allow the WHOLE to do it job, rather than just the top and sort of forcing the induction through the AFM??

Its a dual POD like the top and also the side, its a decent one...

Ok a couple of things, if I've understood you properly...

The Pod adaptor should be 80mm diameter, not 75mm.

Dual POD? Like an RB26? But you've only got one turbo...

Can you show us a pic?

Leon, when you say an airbox and standard filter will flow more air, have you tested it?

You may have misunderstood my post. It reads as one long sentence. To paraphrase, the standard airbox will flow more air than the engine will most likely ever need. But, to make it harder to read (lol), I also inserted that the air will most likely be colder & the extra restriction will be negligible (referring to std airbox).

I have no doubt a pod filter can flow more air (I admit that change on the informeter is surprisingly large Ryan), but at what cost? More flow generally equals less filtration (no such thing as a free lunch). It's a matter of weighing up risk v's reward I guess.

I've read lots of tests that show pod filters often provide no measurable gain, so I'd rather spend my $100 on something else. I wouldn't mind being proven wrong (before & after dyno tests anyone?) but I don't want to risk my engine ingesting dust & grit for the sake of a few kW (I live in the country remember). For an extra 10+rwkw maybe I would; but I'd be dreaming if I thought that was realistic.

Having voiced my opinion, I understand people spend more money on an exhaust because they like the sound, so if the extra induction/turbo noise puts a smile on your face, than that's cool :thumbsup: .

Hey guys

Well having dramas again with unsure weather its the AFM meter again or not? I had no pod on the AFM meter before and killed the AFM (totally my fault) an now I have a pod adapot and a pod filter on it, you go to plant your foot down and I hit around 5000rpm and it's like the brakes ate being slammed on, pulls right back at me? Any idea what this is caused by? I am goin to put the standard air box back on but my other recent turbo cars I have done this and never had any issue with it? Also I blocked the bov of to make it flutter also any problems with doing this or anything? Let me know guys?

Regards

Matthew :)

Sounds like you are hitting Boost Cut.. This is when the AFM has a voltage reading of 4.85v or over for any amount of time (on the stock ECU) , the ECU will cut boost and fuel to protect the motor.

It feels very much like the brakes have been applied very quickly.

You may have misunderstood my post. It reads as one long sentence. To paraphrase, the standard airbox will flow more air than the engine will most likely ever need. But, to make it harder to read (lol), I also inserted that the air will most likely be colder & the extra restriction will be negligible (referring to std airbox).

I have no doubt a pod filter can flow more air (I admit that change on the informeter is surprisingly large Ryan), but at what cost? More flow generally equals less filtration (no such thing as a free lunch). It's a matter of weighing up risk v's reward I guess.

I've read lots of tests that show pod filters often provide no measurable gain, so I'd rather spend my $100 on something else. I wouldn't mind being proven wrong (before & after dyno tests anyone?) but I don't want to risk my engine ingesting dust & grit for the sake of a few kW (I live in the country remember). For an extra 10+rwkw maybe I would; but I'd be dreaming if I thought that was realistic.

Having voiced my opinion, I understand people spend more money on an exhaust because they like the sound, so if the extra induction/turbo noise puts a smile on your face, than that's cool :thumbsup: .

Haha right that makes more sense Leon. I've read many a conflicting report on pod filters and their filtration, and haven't worked it out entirely myself. But I had the K&N pod kicking around, and thought I'd try it as an experiment. It's worked kind of well, except that with the ECU relearning its hammered by fuel economy. On the plus side it does give me room for a catch can and easy access to my HID ballasts :thumbsup:

That, and the Fcon should allow me to tune around any issues. If I've got the setup to make use of that extra airflow then I'm pretty keen to do so. Suction pipe will be next on the list!

Sounds like you are hitting Boost Cut.. This is when the AFM has a voltage reading of 4.85v or over for any amount of time (on the stock ECU) , the ECU will cut boost and fuel to protect the motor.

It feels very much like the brakes have been applied very quickly.

I think I was measuring 4.86V after I put mine on, so that would be about right I'm guessing.

Had pod setups on most of my cars to date.......great on the track and freeway......shit on a town car......just remember there is a temp sensor in the afm with our car so the more heat the crapper it will run.

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

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...