Blacktop trumpet/intake question(s) (UPDATED)

[eightytrueno]

haha yep its stil sitting there!!! altho i think it should be ready for the drift day on the 10th..

[AE85.6]

hmmm if i look into a blacktop 20v that a mate may be selling i was looking at doing this cause the 20v would be going to a rwd mounting in my levin, i assumed most rwd 20v did the trumpet thing to avoid the intake facing the wrong way or doing the whole cut and shut mod, i know the sound is cool and all but i dunno if i do get the 20v if i should or just keep the intake and modify to face the front ?

[Bling]

i know the sound is cool and all but i dunno if i do get the 20v if i should or just keep the intake and modify to face the front ?

trumpets all the way i'd be out driving.... but out of petrol its all about the sound

[fangsport]

why not rotate the trumpets 180 degrees . it may reduce inlet temp??

[Bling]

Yeah did try that, but i'm pretty sure the filters hit, and bend under the bonnet as they sit quite high.

getting a lot of work done to get cold air back there so shouldn't be a problem for cold air (once sorted)



no one know about the air lines i removed from the plunum?

[AE111_modifier]

how it looks.....



got filters and shes all go!!!

relocated the battery and air temp sensor, removed all factory airbox ducting / resonator box and plan to have some new ducting in place when I get time.


I now have 2 'redundant' air lines, both of which were plumbed into the factory plenum (pictured below)



from what i've read, one is a vacuum hose and the other ISC hose (whatever that is)

my question is this, do I need to filter these hoses, or do they not require filtering?

chur chur

Those hoses should really be filtered. I know one is for when the engine is idling and the throttle body butterflies are closed. You could buy 2 K&N vent filters and get a custom bracket and filter the air that way.

If you want cold air you should just route some flexible PVC ducting from the front bumper to the trumpets. You know where the original plastic cold air intake tube went from behind the headlight to the air box, somewhere along there it dropped into a plastic resonator... you could enlarge that hole and duct cold air from behind the bumper there. If you want equal cold air do the same on the other side. Also you should use the half of the air surge tank that mounted directly to the throttle bodies as a heat shield.

I thought another way you could do it would be to get some flanges custom cut the same shape as the old ones. Then weld on the appropriate length of steel tube and use individual K&N filters. Also with this setup you could drill a couple of holes into the steel tubes and weld small diameter steel tubing to it to fit those air hoses over that you were talking about that way you wouldn't need vent filters. If you wanted you could even cut the original tube of the surge tank that the air hoses were mounted to and weld them on as a cheaper sure fit option.

[Bling]

I'll look at making a heat sheild (me being flatmate ) and will also having ducting (all from right hand side as left hand side doesn't allow) feed into a steel box that fills the gap left by the removed airbox and bits, it will lead to behind the engine and should provide cool enough air.

i'll look at getting something to filter the two air lines in that case, cheers

will post when I get something sorted

[AE85.6]

how long are the stock trumpets ?

BZG|Bling:
you choose to use bent tubes because they sat too high and fouled the bonnet or cause the ones you chose were to long to be used striaght ? or both ?

for me being RWD id have a bit more room, i think id just have to masage one of them if they were too long as it touches the brake booster, but pointing out the side i think id get less warm air than on a FWD setup ???

was mainly the fact that all the ones ive seen mounted RWD have had trumpets, i just havnt seen one done without them

eightytrueno:
home made ones look all good man !!!
how long are those ones ?
have you tried them compaqred to the stock ones ?

[Bling]

the ones i'm using are factory trumpets that are inside the factory airbox..... might not understand you correctly tho, is that what you're asking?

if trumpets come along that are straight, i'll look at getting them, but for now this works

[AE85.6]

oh sorry i thought the pic of the bent trumpets you and AE111_modifier posted was of your car, obviously not then hehe, whos car is that one ?

[Bling]

tis mine.... and tis factory trumpets

[AE85.6]

ah ha true, sorry didnt know what the factory ones looked like ive only seen after market ones or home gorwn ones like eightytrueno posted

[eightytrueno]

cheers man, havent had the engine running with them yet but should be a bit better than stock ones. those stock ones didnt seal properly around the intake manifold even with gaskets, bzgbling i'd be careful of that on yours!

ae85.6 - they are about 8cm long, and 51mm inside diameter. i'm still anxiously waiting to hear RedMists comment on them!! they probably dont do heimholtz... (bad english on purpose). i think ideally to be heimholtz good they should be a bit longer maybe? theres only really room for about 75mm longer before they would hit the brakebooster tho

[bad20v]

And again... just a wee idea:

[AE111_modifier]

bad20V That is awesome!!!!!! is it your car? Did that set up gain extra KW's? That is one sexual engine!

[Lanius]

The trumpets on my engine are facing the other way ? (towards the windscreen)

What am I missing here ... ?

http://photobucket.com/albums/a293/lanius/th_AE82blacktop2-engine.jpg

[Bling]

And again... just a wee idea:

unless u HAVE that idea....

have u priced that up? i know I did and wans't impressed (for k&n) around $400 for filters

very sexy tho for an engine..... although lack of trumpets may upset Redmist

those stock ones didnt seal properly around the intake manifold even with gaskets, bzgbling i'd be careful of that on yours!

yeah I did notice that aye, not sure how it would be sealable either, but I don't think much air will get in the gap. May just look at having some soft rubber seals "rangi'd" inbetween the trumpets and manifold if i seems too bad

[bad20v]

bad20V That is awesome!!!!!! is it your car? Did that set up gain extra KW's? That is one sexual engine!

Ummm.... no.

Its just a picture I found off the net awile back. Besides this setup was from a AE86 so it was a NTH/Sth facing engine. I guess it would still work.
The K&N filters aren't that expensive if you know what your looking for. If you go to some aftermarket accessory store and ask for a specific filter size etc... they will rip you off!
But, if you go ask for a half set a V8 ram tube filters, you can buy them individually for around $20 each. I priced some up for mine for about $14 each at Auto Wooltons in Papakura. You have just got to know what to ask for.

[bad20v]

From another thread:

cold air would be sorted if you cut a hole in your bonnet and add a scoop obove the filters


anyone got a cheap one for sale?

Here's a little idea I had a while back:



Could incorporate the K&N filters into it somehow.

[Lanius]

Its just a picture I found off the net awile back. Besides this setup was from a AE86 so it was a NTH/Sth facing engine.

*breathes sigh of relief*

That explains it ... thought it was your engine, and that I was losing the last threads of sanity I had left

Your scoop idea is pretty much what I was considering, only concern would be the scoop catching anything other than air (read: water / bugs / stones etc) and sending it down into the trumpets. I would also have trouble doing that on my engine given the lack of room. Hence deciding on cold air feed from the front guards somewhere.