XR6 Airbox mods and intake muffler delete N/A. Project: 13s for fk all - part1

[@FPV_Engineering]

Mate, you’ve done a great job with this video. If I where to point out the only issue, it’d be that it wasn’t the PCV you removed. It was the crankcase breather. The PCV valve is the white plug in the rear left corner of the cam cover. Only a tiny inconsistency. Otherwise, you’ve done bloody well.

[@backyardbunkybuilds7461]

Hi Josh I know right ....was one of those brain snaps but didn't want to re shoot the video. Glad you enjoyed the vid 😁👍

[@luke28411]

So are you meant to put it on the front or the rear one please help

[@backyardbunkybuilds7461]

G day Luke. If your replacing the intake pipe its the one closest to the front of the car. Ultimately both can be re routed to a catch can if need be without any issues. Hope I helped

[@Healthliving1967]

I did this and it threw up a check engine light ! I found out it needs to be a closed system otherwise it will keep throwing up a check engine light even if you clear it. Oil catch can or run the factory hose back into the intake.

[@oliveira9137]

Awesome been looking for a video like this. As I hv a Ford territory 2012, do basic upgrades. Your tips work well, saved me abit of coin. Watching from Samoa 🇼🇸 Pacific territory 💯🔥🤙. Surfs up uce 👍😎🏄‍♂️🍻

[@extroyor3483]

Thank you for the video man. Just did this exact same setup on my FG and the intake noise in insane. Picked up the parts from autobarn and did it in about 40 mins

[@matthewkeim6375]

I like how you are using a na xr6. 2 many videos are all about turbos. 🙃

[@backyardbunkybuilds7461]

Thanks Matt ....hopefully I'll get some more vids done soon ....just need the drag strips to re open !

[@matthewkeim6375]

Yeah old mate has a mid 8 torana alcohol racing fuel car!! And yeah we are waiting for the green light 2!!

[@kkstr]

Not sure if anyone has mentioned this but that's not a restrictor it uses some fluid dynamics called the Venturi effect. (High pressure, low flow rate converted into Lower pressure, Higher flow rate using a constriction)

[@Recklessbah]

Hey mate I’m from Perth to. Just fitted my my street fighter intake. Now I’m gonna get on this. Thanks for the tutorial. 😂👍🏻👍🏻👍🏻

[@jasonkay616]

Really enjoy your videos . Like how you have utilised the factory air box they work well . I’ve done this on another vehicle when I was younger even got the dremel out and grinded away the webbing /ribs smooth

[@ysomadbeats]

The Restricter in the air box is to increase the velocity of the air going into it for more low end power. It’s not much of a restriction at all, it’s just forcing air into a narrower hole to get it through the filter quicker

[@backyardbunkybuilds7461]

Hi Harrison. Yes that is correct but at higher rpm it becomes a restriction and we are regularly seeing 6000rpm

[@jarrod6400]

Yeah, old mates not wrong here, when your engine revving out its wanting to be breathing in more air so a restrictor in the airbox seems silly if you ask me. The barra has enough low end torque already there Haha.

[@ysomadbeats]

Jarrod the same about of air will go into the the engine reguardless, the only difference will be its velocity, the restriction adds pressure to the air which forces it though the intake quicker. You can test this with a hose at home. Fill up a bucket with the hose and time how long it takes, then do the same thing but pinch the end of the hose, the 2nd bucket will fill up quicker because the faster you push out water, the faster the water can move to rush behind it. Same principle applies to engines and removing that restriction decreases the amount of airflow across all rpm, it is however much more noticeable in the low end then it is in the high end, if he’s not opting for a larger intake then he should keep the restriction there.

[@jarrod6400]

@@ysomadbeats yeah I understand what your saying, I'm just only going by the feel of the car and I must say there is a bit of power gain especially in the top end. Idk but I know that a K&N filter installed, I felt a big difference

[@backyardbunkybuilds7461]

This will be easy to test once the track re opens .....I'll run the car as is then will run with the standard airbox and see what the results are. Only thing that sux is that the tracks are closed until next season

[@kcjnr371]

Hey bud yea my 2011 fg is standard also so i followed the same steps as you showed & mate she sounds good, increase in power aswel, still got standard exhause system tho lol but im happy...Cheers buddy👍

[@backyardbunkybuilds7461]

Yeah they sound pretty epic with the airbox opened up 😁👌

[@jimclarke1108]

Clever little modifications )) might look at my FGX and my son's BF

[@MRDOOMBOY12345]

Installed a cold air intake today to my na fg, looked up and noticed a massive crack in the rubber between the throttle body and the air muffler set up. Might just follow your guide and delete the whole thing.

[@loganboykett]

That's not the pcv valve the one at the back of the rocker cover is that's just cranck case breather

[@Healthliving1967]

If you just disconnect the breather pipe from the cam cover outlet to the air intake system and put that little air filter on it it will throw up a check engine light. You either have to run an oil catch can or run the breather hose into the silicone pipe intake otherwise it will keep throwing up the check engine light.

[@backyardbunkybuilds7461]

Hi James our car has never thrown a code ....and it shouldn't if done correctly

[@outlawdingo3020]

I can see the holes in the front could work a lot better if you took the headlight out and made a custom cold air intake that comes out the headlight and you block off the factory cold air intake inlet

[@KJ-qw1qm]

I was advised not to modify the intake pipe, as it will lose low end power. Was also advised the restrictor is there to help low end power. Have you done a Dyno Yet ?

[@backyardbunkybuilds7461]

Hi KJ that information is true ....but !! Although you sacrifice a small amount of low end power the trade off is increased midrange and top end power. Once the world returns to normal we'll tune and dyno the car and should expect around 190/200rwkw

[@EXZACHTPERFORMANCE]

Only really worth favouring mid/top end if the gearing is short enough to keep it out of low revs and in the power band

[@backyardbunkybuilds7461]

It definitely makes a difference as the car makes very impressive power....video will eventually come with dyno figures and their impressive!!

[@techhints4343]

@@backyardbunkybuilds7461 I think you will find that there is no low RPM power loss from changing your intake pipe. But also no low down benefit since the standard air box flows enough to not cause any significant loss up to around 4-5000RPM. After that as you have described you will get a power increase. People believe some strange stuff that they don't even understand. All the power due to velocity effects is for intake port size and extractor diameter including length, not with an intake pipe. Reduce restriction before the throttle body and you will not see any negative effect!

[@backyardbunkybuilds7461]

Spot on Tech Hints 👌

[@jimmyyrebel666]

Hey mate. What's the lengths of length of the silicone hose pieces for either end and length of the elbow? Got a street fighter cold air intake coming for my fgx xr6 ut, and this would accompany it nicely. Got the DEA cat back system too. Sounds nice. Thinking of rear muffler delete

[@edoardotrivulzio2784]

Can I just keep the stock hoses, delete the restrictor and making holes on the box for better airflow ?

[@backyardbunkybuilds7461]

Yes that will work and probably perform just as well. The stock intake pipe has a muffling system to reduce intake noise but it shouldn't restrict flow. So you should get the increase in flow without the noise. 👍🏻

[@spaz-_-4023]

Did this the same to my n/a 6 and its pretty loud for a modded airbox, almost sounds like its the exhaust

[@TheJez135]

I've tried to do the same as you here but the aluminium pipe I bought was too long. I'm just gonna cut it to size with an angle grinder. And far out it took alot of effort to get that hose onto the airbox for me.

[@backyardbunkybuilds7461]

Yeah its pretty tight ....but a bit of spit helps !! We've had our car on the dyno and that airbox combination works really well .....will do an update when time permits but is the highest number ive seen for an NA so far

[@craigfiles7067]

To bad it makes your car a roadworthy defect if caught by the cops

[@rtj7836]

Why not an aftermarket enclosed box with pod filter?

[@backyardbunkybuilds7461]

Gday RtJ because the factory airbox is capable of making the same performance without the added cost.

[@rtj7836]

@@backyardbunkybuilds7461 awesome. Just genuinely curious, have a NA ba falcon I wanna play with. Cheers

[@nunika1975]

I went with a Herrod on my 2014 XR6 EcoLpi, and noticed higher consumption and loss of low end. Perhaps I need an exhaust and tune.

[@backyardbunkybuilds7461]

Should've helped it breathe alot better, let us know how you go if you get it tuned 👍

[@pijnto]

I don't know about your state, if you replace the crankcase breather with filter and the intake muffler, either one, get pulled over by the fun police the car will defected

[@backyardbunkybuilds7461]

Its not to bad over here, but its highly possible. Worst case will add a catch can

[@dougrann6049]

hey mate, thinking of doing something similar to my N/A FG. Do you think if I replace the normal air filter with a pod filter and cut the box a bit more than you did then get some extra piping it would make much difference to what youve done? would still delete the intake mufflers and the hose with the PCV valve filter.

[@backyardbunkybuilds7461]

Its worth a crack ....but ultimately the modified airbox flows more than enough for the NA barra. If you do it let me know how it goes

[@dougrann6049]

@@backyardbunkybuilds7461 I’ll follow your guide for now to delete the intake mufflers and in the future I might go to a pod filter, good video 👌

[@chrissmith9854]

Thanks for the vid.., I’ve got a 09 xr6 witch has the panel filter.. I’ll go pull out the thing in the air box.. next will try everything u have done. Was it more punchy at all

[@backyardbunkybuilds7461]

Hi Chris. It actually did make a difference in performance in the midrange and top end as well as some glorious induction noise 😁👍

[@chrissmith9854]

Backyard Bunky Builds sweet as I’ll be doin this

[@riza.1118]

Where did you get the alloy and silicone pipes and would you have got anything different with the piping.

[@backyardbunkybuilds7461]

I got the silicone joiners and aluminum pipe from Autobahn and to be honest its worked perfectly 👍

[@tanushmore9007]

Hey mate, how much did you spend all up on this, and would this return the same performance gains as say a growler intake kit?

[@backyardbunkybuilds7461]

The prices are listed in the comments below and with this intake the car made 280.8rwhp (209.4rwkw)

[@Healthliving1967]

I have a growler cold air intake, i also deleted the factory intake the same here and it threw up a check engine light! It needs to be a closed system otherwise it will keep throwing up a check engine light even if you clear it. Oil catch can or run the factory breather hose back into the intake to eliminate this problem. My fg is running a a set of wildcat 770 extractors,high flow cat and xforce 3.5 inch rear exhaust system, also has bigger fuel injectors and re-tuned,dyno ran consistent 300 rwhp.

[@stevejobs553]

any change in fuel mileage?

[@backyardbunkybuilds7461]

With everything done to the car so far its seeing 9.4 litres to 100km average fuel milage and 600km to a tank on 98 octane. Plus now has more power than it did when it ran 14.2 seconds at kwinana.

[@joerobinson9304]

Someone for the life of me please tell me how hes got a 12mm breather on there. Got myself a K&N 3/8-1/2in (9.5-12.7mm) filter and cant see how its even possible that it fits on there. I am aware that its likely to be more difficult as its a universal filter with a size range, but looks like it needs to be at least double the size. Any help appreciated, cheers.

[@backyardbunkybuilds7461]

Hi Joe the filter needs to be a tight fit because you can't fit a hose clamp on it. I spat on it to lube it and it pushes on with some twisting and elbow grease.

[@kennethwarrenpeach5623]

Hay Bro would this work for the BA XR6 non turbo models as well

[@backyardbunkybuilds7461]

Hi Kenneth yes these modifications will work on the earlier BA and BF models but the piping will be a bit different.

[@kennethwarrenpeach5623]

@@backyardbunkybuilds7461 thanks Bro I'll suss it out on the misses car tomorrow

[@chris929rr7]

For the NA, best result I had on a 04 BA was 1) F6/XR8 lower snorkel (runs from under headlight front of the bottom part of the airbox) 2) F6/xr8 snorkel (big mouth) that runs from the bonnet down to the original hole in the side of the airbox facing the radiator. I found the lower section of and XR8 airbox that included these intakes on eBay from memory. K&N panel filter. Pulls hard and very clean all through the revs. Don’t bother with exhaust especially if it’s an auto (might be worth cutting out centre muffler on a manual) Clean the throttle body Iridium plugs (100,000kms) Stock coil pack

[@Righttv.]

How much increase of power does it do .

[@backyardbunkybuilds7461]

Combined with other mods it out performs the expensive brand name intakes like herrod and street fighter so far ......car makes 280.8rwhp with this setup.

[@Go_PORSCHE.]

Did you notice any difference in the car when doing this? Thinking of doing the same kinda thing

[@Go_PORSCHE.]

I have a 2014 fg mk2 xr6

[@backyardbunkybuilds7461]

I actually did notice a small increase in power but mostly it sounds awesome!!! Considering the cost its a great first modification. Once the other mods are done it will make a bigger difference.

[@Go_PORSCHE.]

@@backyardbunkybuilds7461 I took out the restricter from the airbox for now to see if that even makes a difference. Ive already got an xforce exhaust so i doubt ill hear any change

[@backyardbunkybuilds7461]

Cutting the front of the airbox (like XR8's) makes a difference......do you have a performance filter ?

[@backyardbunkybuilds7461]

Our car went 14.2 @98mph with just the airbox mods and 20% underdrives!!! Would've been 13s if we could get traction

[@mickblack2800]

Any mods for BA XR8?

[@backyardbunkybuilds7461]

Yep they benefit from a larger intake tube and sports filter even more than the 6cyl

[@jtsn667]

ever get it into the 13s?

[@backyardbunkybuilds7461]

Unfortunately we haven't had the opportunity to take it back but its much quicker now than it was when it was running 14.00s so time will tell.

[@jtsn667]

@@backyardbunkybuilds7461 please keep us up to date as there would be quite a few of us that will probably copy what you've done 👍 I've got a na territory and am doing diff gears, bolt ons, udp's, cams and I'll probably copy most of what you've done

[@backyardbunkybuilds7461]

Unfortunately its going to be a while before we can run the car again as we've moved over 600km away from the track but the car is definitely capable of mid to low 13s now it's just getting the correct conditions and traction to do it. The thing blazes first and a bit of second gear now even on a roll on with 265 rears.

[@_Musashi_13]

Isn’t cutting holes under the filter when it normally draws from the top defeating them purpose of having the filter?

[@backyardbunkybuilds7461]

Hi Andrew the filter sits on the airbox (lower section) and draws air through the lid which is sealed to the inlet. By cutting the airbox (lower section) it increases the amount of airflow available to the filter which is then drawn into the inlet.

[@DeL8r]

Andrew Smith it draws air from the bottom, the air coming though the holes still has to pass through the panel filter 👍

[@lsvolks1999]

Downside of putting a breather on idles like Shit plus losses pressure in higher rpms

[@backyardbunkybuilds7461]

I haven't experienced any of those issues ? Have you changed anything else ??

[@joeblow3869]

Any good ideas changing grille and boot emblems

[@backyardbunkybuilds7461]

I jut used FPV ones to change over from the blue oval style