Notice: We request that you don't just set up a new account at this time if you are a previous user.
If you used to be one of our moderators, please feel free to reach out to Chris via the facebook Outerlimits4x4 group and he will get you set back up with access should he need you.
Recovery:If you cannot access your old email address and don't remember your password, please click here to log a change of email address so you can do a password reset.

Airbox lid idea

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

Post Reply
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Airbox lid idea

Post by GU-ish »

Since having put the cooler on my car i was thinking of putting a 3L airbox lid on.
while looking around the net i notice they still dnt have a full radius around the side of them.
what i have thought of doing is removing what plastic mould that is currantly there and using a 3" stainless doughnut (to give a tight full bend) and go from there.
the inside diameter of a 3" doughnut is 30mm, so there would be a gap of 15mm between the lid and the underside of the stainless.
i dnt think its possible to get it any lower, only other way i can think of is doing a lobsterback which wont flow as well.

did some quik measurments and it looks like it will fit under the bonnet.
Any thoughts or ideas welcome. Im no master on the subject.

i here are some pics to better explain it.

STANDARD 4.2 AIRBOX LID
Image

WHERE YOU WOULD MOUNT TO INSIDE THE LID, USING SILICONE AND SMALL NUTS AND BOLTS OR RIVITS. OF COURSE IT WOULD NOT STICK ANY FURTHER IN THAN THE BLACK PLASTIC DOES.
Image

BASIC IDEA
Image
Posts: 1857
Joined: Fri Feb 02, 2007 12:16 am
Location: ipswich

Post by nastytroll »

could be done, I would also make a braket to support the end where your induction outlet pipe will attach.
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

yeah i yas thinking it needed something like that but looking at the benifits of it over the 3l one.
Also does anyone have a 4.2 airbox lid so i can start cutting it up as i drive my car everyday. Will pay.
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

Why not get the whole airbox out of a ZD30?

Go round and check out colbys one, might be easier?
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Posts: 45681
Joined: Wed Nov 27, 2002 10:13 am

Post by bogged »

didnt a bloke do the "high flow" airbox lid using PVC pipe on patrol forum.. total cost of mod $3.00
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

aido, the air boxs are the same, only the lids differ.

bogged, yes i have seen then that. that is where i got the idea from but there was not much said about how it compaired.
and stainless wouldnt look as "tacky"

so do people think it would work better than the 3L lid?
Posts: 1857
Joined: Fri Feb 02, 2007 12:16 am
Location: ipswich

Post by nastytroll »

I do, zd30 lid is not all that different to td42. it is only slightly bigger.

Bogged can proberly find the dyno sheets/specs andy posted about it.
Posts: 1857
Joined: Fri Feb 02, 2007 12:16 am
Location: ipswich

Post by nastytroll »

an easy comparison would be to calculate the x section area of the original lid to the pipe.

You may be suprised how much more area the pipe has.
Posts: 45681
Joined: Wed Nov 27, 2002 10:13 am

Post by bogged »

another thought, why does the pipe have to come straight up and right... why cant the pipe that comes up on the top of the lid be on an angle, so then the bend to the turbo is only 45 degrees??
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

bogged wrote:another thought, why does the pipe have to come straight up and right... why cant the pipe that comes up on the top of the lid be on an angle, so then the bend to the turbo is only 45 degrees??

nothing at all... just hard to draw it on a slight angle from the view i did ahahah...
would bring it out on an angle simular to standard.
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

ok well i came across an airbox lid today (off a 2.8) so i was able to start cutting up my standard 4.2 one. the reason i used the 4.2 over the 2.8 is because the 4.2 has a 3" hole and the 2.8 has a 2.5" hole (or there abouts, its smaller)

took me about 20min to cut it up, now it is in the capable hands of Andrew (awill4x4) welding up the rest... using aluminum not stainless as first planned.
will be excited to see if it fits under the bonnet.

Rough cutout with grinder
Image
Image

cleaned it up with the bench grinder and sanding/ flip disk on the 4" grinder... finished with a touch of sandpaper.
Image
Image

Another pic to show the 3" hole, pretty nice and snug.
Image
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

So its going to have a 90 degree bend coming out of the top and will sit flush with the top?
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

Weiner wrote:So its going to have a 90 degree bend coming out of the top and will sit flush with the top?
will prob sit mayb 10mm above the top, using the tightest bend.
may be able to take more out of the lid to get it lower if possible...
fingures crossed lol
Posts: 1072
Joined: Sat Aug 26, 2006 6:04 pm
Location: Melbourne

Post by Weiner »

GU-ish wrote:
Weiner wrote:So its going to have a 90 degree bend coming out of the top and will sit flush with the top?
will prob sit mayb 10mm above the top, using the tightest bend.
may be able to take more out of the lid to get it lower if possible...
fingures crossed lol
Gunna get it re-tuned after its done?
'89 Hilux Single Cab - 3RZ, 35" Kreepy Krawlers, 4.88's, F & R Air lockers, RUF, Longfields, TG Highsteer, Highmount and no money
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

yesum... should have it done by wed night... and rang diesle tec today... should be good for monday if i have it ready.
Posts: 31
Joined: Wed Jan 12, 2005 1:09 pm
Location: Rock

Post by Austravel »

What was the outcome????????


GU-ish wrote:yesum... should have it done by wed night... and rang diesle tec today... should be good for monday if i have it ready.
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

Austravel wrote:What was the outcome????????


GU-ish wrote:yesum... should have it done by wed night... and rang diesle tec today... should be good for monday if i have it ready.
after getting the aluminium bend done, i left the cut up lid in a bull bar, never to be seen again!!
still have the aluminium if somone wants to donate a standard 4.2 lid.
Posts: 31
Joined: Wed Jan 12, 2005 1:09 pm
Location: Rock

Post by Austravel »

Damn, so you didn't even get a chance to get it dynoed to see if it made a difference?


GU-ish wrote:yesum... should have it done by wed night... and rang diesle tec today... should be good for monday if i have it ready.
[/quote]
Posts: 240
Joined: Thu Dec 25, 2008 9:48 am
Location: Melbourne

Post by GU-ish »

nope lol. Was shattered. Ended up just putting on a 3L lid on it. Worked good. Would have been good to compaired the 2.
Posts: 31
Joined: Wed Jan 12, 2005 1:09 pm
Location: Rock

Post by Austravel »

So do you think it really did make much of a difference? Did it help fuel economy? Did you actually feel higher torque or did you find only the response time improved?

Guess I'm trying to see if it really is worth the $$ and effort. My gut feel is that if anything only response time could improve and only if there was already a high enough restriction to reduce this.

Keen to know if you'd do it again due to the benefits or do you think it's more a perceived improvement.

Thanks again.
AJS
Posts: 79
Joined: Sun Mar 20, 2005 10:51 am
Location: Exmouth WA

Post by AJS »

Just wondering if you may have had a problem with bonnet clearance anyway, I know mine was fairly tight when I put it in. What was the difference in height between the two lids?
Post Reply

Who is online

Users browsing this forum: No registered users and 10 guests