Air filters

[stevebradford]

there’s a reason that hose is factory ribbed for your pressure.

Common! That’s it no reaction to that! I found myself extremely funny and witty, pure gold!

 

[cruiserpilot]

Sort of on the topic.

My air filter housing (60 series) flex pipe to smaller diameter (I haven’t measured yet) turbo is on its way out. Anyone found a suitable tapered flex pipe? Toyota part number? Or have a good used one?
View attachment 3339345

I talked to a friend from MUD here in Ontario. He’s got the nicest rust free 60 I’ve ever seen. California truck. 3B with new turbo.
This is where he got this replacement.

2.5-3"5MM 90 DEGREE ELBOW TURBO/INTERCOOLER/INTAKE SILICONE REDUCER HOSE BLACK | eBay

Find many great new & used options and get the best deals for 2.5-3"5MM 90 DEGREE ELBOW TURBO/INTERCOOLER/INTAKE SILICONE REDUCER HOSE BLACK at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Just have to look J

 

[cruiserpilot]

Screen shot. He said he had to modify the air cleaner housing or something to get the angle right. I might see him again so if I do I’ll get better pic and info. BTW, I've got the same almost onto my GTurbo, and it's running 20+psi at times. It came with the turbo, so I'd not give collapsing
much thought, this stuff is pretty rigid in place, more worried about sealing and clamping

 

[stevebradford]

For some reason even if I turn my cleaner lid I think I have much more reach than that picture, different manifold maybe? That turbo appears to be towards the front more than centred on the manifold like mine.

You’re right a short section like that shouldn’t have an issue with collapsing. A longer section like the factory hose but not ribbed could collapse especially if on a dusty trail and the filter was getting restricted. You wouldn’t notice till you got back on the highway and flogged it noticing the boost topping off at less pressure and the motor bogging down at the top end. There’s a whole 3000 page thread somewhere on mud i didn’t read about the turbo’d Toyotas pulling a negative pressure threw the clean factory air cleaner and resulting power loss.

 

[stevebradford]

I’m lying, I did read it.. even though I don’t have a massively boosted 12ht or 1hd-t…

The "Official" 1HZ/1HD-T/1HD-FT Airbox/Intake Mod Thread

forum.ih8mud.com

Some interesting info in there that could even possibly be relevant to a turbo 3b. If they are upping their boost and running into restrictions with the factory cleaner size at 3 or 3.75 inches, most agree 4inches is ideal and noticing a markedly quicker boost with the upgraded outlet. Possibly a scaled down turbo’d 3b could benefit from an upgrade to its also scaled down factory outlet. Bah! You say it’s just a 3b! Well a 3b is a 3.4L and 12ht is only 4L motor, both doing similar rpm they are both sucking a lot of air. I wonder what size air cleaner outlet a 13bt came with?

Interestingly the air cleaner itself has stayed the same size since the 60 series with only the outlet tube of the lid changing with engine displacement.

Lids (don’t quote me these are internet numbers)
60, 70 N/A bj series 2.75inch outlet
12ht 3.5inch outlet
1hd-t 3inch outlet
1FZ -FE 3.75inch outlet

 

[stevebradford]

For some reason even if I turn my cleaner lid I think I have much more reach than that picture, different manifold maybe? That turbo appears to be towards the front more than centred on the manifold like mine.

ah hah I think I figured it out!

You said that’s a California cruiser, they didn’t get the diesels so that must be a diesel swap in there. That’s probably the fj60 air box or bj but mounted in a different position with the 3inch outlet lid vs my 2.75.

 

[cruiserpilot]

ah hah I think I figured it out!

You said that’s a California cruiser, they didn’t get the diesels so that must be a diesel swap in there. That’s probably the fj60 air box or bj but mounted in a different position with the 3inch outlet lid vs my 2.75.

Yes, it's a swap. Gary said he actually fiddled with the angle of the air cleaner and welded a little bracket to accommodate. I won't be able to
see it as ironically he is in Alberta for the time being while I sit in smoke in Peterborough. My air cleaner on my 12HT looks to be the same,
but whatever the stock piece for a 12HT is what mine has. Could be 3 1/2". His looks the same, but without measuring it's just supposition.

 

[seapotato]

It's interesting with the cruiser filter housings. I believe they all take the same element, but 40 series are a bit smaller diameter.

Then there's the lids. The one one installed on my 40 is from an HJ61, the rustier one is an 83 ish BJ60.

I was thinking about making a jig for my press to squish that dimple out to allow more air flow, but it looks to me like the older BJ version is actually less restricted than the newer 61 version. My 61 is the same, flattened right out on the one side. Makes you wonder why toyota would do that?

Kinda thinking I should tart up the old BJ60 version and put it in my 61.

I gather 80 series ones are even more open on top, if it makes any difference. I pulled this one out of the shed because I might have to modify one a bit for my turbo install.

 

[stevebradford]

Yeah! We unanimously decided the paper element is by far best here, now let’s discuss how to get the most out of that element.

So you slap a turbo on a N/A motor you up size the exhaust pipe right, why wouldn’t you also up size the factory N/A intake?? I’m not talking higher boost pressure, less restrictive intake means quicker boost at less rpm and also less Egt.

Throw away the small 40 series canister the later versions swirl better I believe.

I believe that crushed side is probably to improve flow with a more even less disruptive vortex entering the pipe.. or there wasn’t enough room for the hood to close

This is a N/A 3.4 litre 3B 60 series lid at 2.75 inches

Can you check for me, I believe the 4 litre 12ht to have a 3.50 inch lid outlet from shady internet research.

I can’t find online what size lid outlet the 13bt came with from Toyota it looks visually to be larger maybe 3 inch? if anyone has one please measure for me.

80 series should have between 3 to 3.75 inch outlet depending on what motor with I believe the gas to have the largest diameter.

 

[GTSSportCoupe]

Would be quite interesting to hook a vacuum gauge up between filter and turbo inlet. Could experiment with a few different things then. But really none of these diesels flow much. I think I calculated my 2LTE at 18psi sees 350CFM maximum.

 

[seapotato]

Yeah! We unanimously decided the paper element is by far best here, now let’s discuss how to get the most out of that element.

So you slap a turbo on a N/A motor you up size the exhaust pipe right, why wouldn’t you also up size the factory N/A intake?? I’m not talking higher boost pressure, less restrictive intake means quicker boost at less rpm and also less Egt.

Throw away the small 40 series canister the later versions swirl better I believe.

I believe that crushed side is probably to improve flow with a more even less disruptive vortex entering the pipe.. or there wasn’t enough room for the hood to close
View attachment 3345018
This is a N/A 3.4 litre 3B 60 series lid at 2.75 inches

Can you check for me, I believe the 4 litre 12ht to have a 3.50 inch lid outlet from shady internet research.

I can’t find online what size lid outlet the 13bt came with from Toyota it looks visually to be larger maybe 3 inch? if anyone has one please measure for me.

80 series should have between 3 to 3.75 inch outlet depending on what motor with I believe the gas to have the largest diameter.

My hj61 lid is the same outlet. Just under 3".
I don't have any 40 series airboxes...

 

[stevebradford]

Would be quite interesting to hook a vacuum gauge up between filter and turbo inlet. Could experiment with a few different things then. But really none of these diesels flow much. I think I calculated my 2LTE at 18psi sees 350CFM maximum.

Your turbo can pull a lot of air (350CFM) threw your intake even if it’s restricted but that first big gulp off the stop light will take longer/more rpm to get that air resulting in later boost.

Compare it to a very dirty air filter you probably still get up to your 18 psi boost and drive fairly normally but you notice it’s a little snappier with a fresh filter.

My boost gauge also does vacuum but it’s probably not small enough increments or percise enough to repurpose. I already almost have holes in my flex pipe no big deal to poke a new hole, i should hook up my shop vacuum gauge and test this out.

What size lid outlet did Toyota give the 2LTE?

 

[stevebradford]

Had to dust off the old vacuum gauge, never used it on a diesel before!

Conveniently i discovered a nipple Toyota probably put there for exactly this purpose I had over looked all these years!

And there you have it! I have 3/4 to 1 psi spike that drops off to a half psi of vacuum on my factory intake post filter at 3000 rpm 10psi boost. And that’s if my very cracked flex pipe isent leaking. and no change with the filter removed.

Any of you are welcome to borrow my gauge to check yours. If you cared to have a gauge permanently installed in the truck you could probably watch your filter get clogged.

 

[seapotato]

Had to dust off the old vacuum gauge, never used it on a diesel before!
View attachment 3345242

Conveniently i discovered a nipple Toyota probably put there for exactly this purpose I had over looked all these years!
View attachment 3345243

And there you have it I have 3/4 to 1 psi spike of vacuum on my factory intake post filter at 3000 rpm 10psi boost. And that’s if my very cracked flex pipe isent leaking. and no change with the filter removed.
View attachment 3345244

Any of you are welcome to borrow my gauge to check yours. If you cared to have a gauge permanently installed in the truck you could probably watch your filter get clogged.

Interesting. I have a static pressure gauge with 2 leads, so could actually do a comparison of the 2 different lids.

Someone sent me a pic of the 80 series lid. It looks a lot more free flowing , but I'm not sure if it matters.

 

[stevebradford]

I would love to try the 80 series lid on mine and see if there’s a difference. I need a new flex pipe and the factory one is unavailable so I have to make up something custom anyway. Know of any sources? or are you all running out to grab them now!

 

[seapotato]

The other thing, isn't the intake to that box smaller still?

The line to the engine is 2 7/8 but I think the inlet is smaller...not near truck to measure

 

[stevebradford]

The other thing, isn't the intake to that box smaller still?

The line to the engine is 2 7/8 but I think the inlet is smaller...not near truck to measure

Yes I just measured mine it’s od is just under 3 inches.

Uh oh! Snorkels here we come!!

 

[seapotato]

Yes I just measured mine it’s od is just under 3 inches.
View attachment 3345291

Uh oh! Snorkels here we come!!

Ha, snorkel actually makes it worse, aside from the bit of ram air effect.

When I redid my house ducting the formulas about ducts and overall length were something. Every elbow adding x feet etc. Made my fawking brain hurt

You might see a difference removing that extra intake s***...that'd be worth a look.

Generally you can't make your return too big, and that line to the filter is essentially your return...

 

[GTSSportCoupe]

Yes I just measured mine it’s odd its just under 3 inches.

You poor guy. How do you satisfy your old lady with something like that?

 

[stevebradford]