Jump to content
SAU Community

Recommended Posts

hi guys

on the weekend i did a DIY on my r34 gtt stock bov

we cut a coke can into the shape of the BOV as a gasket to block off airflow causing it to flutter but now it is back firing pritty regularly

y is it back firing so much ?

and how much damage am i causing to the turbo?

thank u =)

Edited by skylinesrus
Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/
Share on other sites

  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

hi guys

on the weekend i did a DIY on my r34 gtt stock bov

we cut a coke can into the shape of the BOV as a gasket to block off airflow causing it to flutter but now it is back firing pritty regularly

y is it back firing so much ?

and how much damage am i causing to the turbo?

thank u =)

your car will also stall.

I did the coke can thing and undid it. Its crap. Get a HKS SSQV if you want flutter.

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3230177
Share on other sites

The afm is expecting air (from plum back bov) to be returned to the air flow, so when you stop that air being plummed back into the air flow the air flow metre doesnt know this and just assumes everything is normal, hence thinking there is more air there than there really is, therefore keeping the same amount of fuel for less air, causing it to run rich. hope that made sence

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3230202
Share on other sites

The afm is expecting air (from plum back bov) to be returned to the air flow, so when you stop that air being plummed back into the air flow the air flow metre doesnt know this and just assumes everything is normal, hence thinking there is more air there than there really is, therefore keeping the same amount of fuel for less air, causing it to run rich. hope that made sence

So if u put the afm in the cooler piping do you rekkin it would run beta?

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3230737
Share on other sites

not too sure but the thing is...people have done this but the AFM isn't designed to be placed under pressure, its just plastic, and excess heat to this plastic can cause it to become brital. The afm relies on an accurate reading of resistance measured by a very thin wire. Any excess heat to this could cause improper readings, hence different air/fuel ratio....probably wouldnt be f**k all but there's no point just for a flutter and bad economy.

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3230770
Share on other sites

LOL

it works... but wouldn't recommend it on a r33 with the ceramic wheels..

blew mine out my exaust pipe and also straight into the intercooler..

i don't see any issue with a steel wheel type turbo

edit: i have fixed this up cos people can't seem to understand wtf i was saying...

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3231400
Share on other sites

LOL

it works... but wouldn't recommend it on a r33 with the ceramic wheels..

blew mine out my exaust pipe and straight into the intercooler..

i don't see any issue with a steel wheel type turbo

Err how is that possible? Is your exhaust connected to your intercooler? :P

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3231517
Share on other sites

LOL

it works... but wouldn't recommend it on a r33 with the ceramic wheels..

blew mine out my exaust pipe and straight into the intercooler..

i don't see any issue with a steel wheel type turbo

:laughing-smiley-014:

Luckily it didn't go the other way and end up in your sump hey? or even worse, in the flux capacitor.

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3231575
Share on other sites

aah.. school holidays :P

if and I stress IF .. your serious about this make sure your aware of the possible damage it might do

also if you REALLY want to do this .. least give the 34 a bit of respect and cut a bit of 3mm Ally plate and paint it black .

on a LOT of cars you will get flutter if you back off on low revs -

at full throttle the BOV is designed to stop air " ramming up against " the throttle body and traveling back past the turbo wheel

Link to comment
https://www.sau.com.au/forums/topic/176614-flutter/#findComment-3231590
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



  • Latest Posts

    • Version 1 aluminium airbox is.......not acceptable No pics as I "didn't like the look.....alot" Even after all my "CAD", and measurements, the leg near the fusebox just didn't sit right as it ended up about 10mm long and made the angle of the dangle look wrong, the height was a little short as well, meh, I wasn't that confident that Version 1 was going to be an instant winner I might give Version 2 another go, there's plenty of aluminium at work, but, after having in on and off a few times, and laying in the old OEM airbox without the new pod filter and MAF, there may be an option to modify the OEM air box and still use the Autoexe front cover and filter.... maybe This >  Needs to fit in here, but using the panel, and not the pod, the MAF will need to fit in the airbox though> I'm thinking as the old OEM box and Autoexe cover that is sitting in the shed is just sitting around doing nothing, and they are relatively abundant and cheap to replace if I mess it up and need another, it may well fit with some modifications to how the Autoexe brackets mounts to the rad support, and some dremiling to move it get in there, should give me some more room for activities, as I don't want to move the MAF and affect the tune Sealing the hole it requires to stick it in the air box is simple, a tight fit and some pinch weld will seal it up tight  I am calling this a later problem though
    • and it ends up being already priced in as though you're just on 91RON without any ethanol. Car will lose a bit of economy as the short and long term fuel trims bring down the AFR back to stoich or whatever it is for cruise/idle for the engine.  
    • Oh, you are right. But, in Australia E10 is based on 91RON fuel and ends up being 94RON. Hence it being the cheaper option for economy cars. The more performance oriented cars go for the 98RON fuel that has no ethanol mixed in. The only step up we have left then at some petrol stations is E85.
    • There is a warning that "this thread is super old" but they ignore that anyway...
    • With 10% Ethanol, we're talking 2-3% fuel consumption difference. The emissions reductions and octane boost in my opinion far outweigh this almost non existent loss.    My tanks sitting at 80%. Luckily that should go down fast as I'm on vacation again for the next two weeks. 
×
×
  • Create New...