BT intake input appretiated!

[touge_ae101]

so got a BT coming next weekend from crampy and wanting to design everything in the engine bay (headers intake etc) for performance and do it properly first off rather than what is easy. always keen for a good challenge.

so been thinking about the intake side of things and trying to figure out exactly what makes the std intake work well or one like ARC be effective to the point where no one else does anything decent for these engines. so really wanting to design my ARC-type intake from scratch and see if i can improve on their design and answer some questions about why they are so good.

so if there is anybody here who has done a bit of solid research any help would be appreciated.

at this stage my thoughts are like this:
- how does the volume of the std intake compare to that of the ARC intake?
- what happens when you increase/decrease the volume (from filter to TB, leaving plenum alone for now)

thought about making up a closed filter box (fed from hole in my bumper - but not pressurised ) with a movable filter plate so i could move the filter up or down, effectively changing the volume of the intake.

not willing to just lie down and say 'toyota knows best' on this one because mass production is a bitch and rapes engines of power left right and centre! plus can't justify spending 800bux on ARC goodies!

[BZR4AGE]

Regarding ARC, I wouldn't say the filter box is good design compared with factory box.

Most ARC filterbox are enclosed cold boxes or facing away from heat, but for some reason the AE111 filterbox is directly sucking all the hot air from the extractor.

Regarding volume, I can probably give you an idea later this week as I have those parts sitting in home at the moment, let me finish my 2.25L coke and I will do some rough estimates for you.

[touge_ae101]

yeah that would be great thanks!what size is the pipe heading to the throttle body?

yeah not convinced that ARC is the best designed yet after seeing what you had to do to modify yours.

any help is much appreciated. if i can find any answers that work i would be more than happy to make some for any toyspeed members also.

[Bazda]

This plenum could be of help.

[Dell'Orto]

Any gains on an NA motor?

[cat007]

Any gains on an NA motor?

You'd get more of a gain from N/A than you would F/I wouldn't you?

[Dell'Orto]

If trumpet lengths etc are good then totally...I can just see this as being far more advantageous to FI sets ups.

[Bazda]

seems to have good gains more on the n/a motor than FI.
Think ke25sr off here was running open trumpets, changed to this and gained a heap more power. Something like 30hp atw along with some other mods.

I guy with a stock silvertop just with exhaust, this plenum and pod in the guard got me to make him one, auto ST as well!!! it made nearly 100kw atw!!! I coulndt beleive it but thats what the dyno read at ST Hitec.

In FI form from having no trumpets just a plenum box, its gained more torque and hp, but not by heaps but enough to have a gain over the whole rev range. It brings the peak power in earlier and holds that power with no real drop till red line.

Trumpet lenghts can be made up to 70mm.

[headshotnz]

seems to have good gains more on the n/a motor than FI.
Think ke25sr off here was running open trumpets, changed to this and gained a heap more power. Something like 30hp atw along with some other mods.

I guy with a stock silvertop just with exhaust, this plenum and pod in the guard got me to make him one, auto ST as well!!! it made nearly 100kw atw!!! I coulndt beleive it but thats what the dyno read at ST Hitec.

In FI form from having no trumpets just a plenum box, its gained more torque and hp, but not by heaps but enough to have a gain over the whole rev range. It brings the peak power in earlier and holds that power with no real drop till red line.

Trumpet lenghts can be made up to 70mm.

Hey man, so what gain do you think it would have for my stock 20v silvertop? was it you that made matt's one? (xsvwgn). you wouldnt happen to have some dyno results by any chance?

[Bazda]

yes I made that one.

I will most likely be getting one tested out on a BT soon. but its not stock.

I can get dyno sheets for the ST that was run.
I do have dyno sheets for the FI one that made 358kw atw.

[touge_ae101]

that is really interesting...were those results with a pod in a cold air box or the stock intake?

how much you after for those plenums??

[Mr Revhead]

seems to have good gains more on the n/a motor than FI.
Think ke25sr off here was running open trumpets, changed to this and gained a heap more power. Something like 30hp atw along with some other mods.

Well thats no surprise! Open trumpets are not exactly the best

[Bling]

Think ke25sr off here was running open trumpets, changed to this and gained a heap more power. Something like 30hp atw along with some other mods.

Which other mods?

I didn't dyno my car, but it was obvious how much power was lost running open trumpets compared to stock intake setup.

touge_ae101, there's lots of mods that can give you gains with your car, bang for buck, a fancy intake plenum is not good value. Just keep in mind that you'll have to spend $$$$ to get a good performance gain.

I'm all for recommended products to people, but if you're going to tell someone they need something Bazda, I hope you're going to back it up with proof its actually an improvement. So if you have proof, post it up, otherwise to me it just looks like an expensive replacement for the factory plenum. Prove me wrong

[Bazda]

I can try get you a direct comparison in the coming months.
I said he needed this but didnt say he had to buy it..

Using BZR4AGEs car as a reference from stock plenum to one of these.
Once he has rebuilt and ready to stick on the dyno.

But from the SilverTop I made one for, the guy recons it was a huge improvement. ST Hitec was a bit amazd by the power output they got.
Only thing was, I dont think he did a run before with the stock plenum but I will try get the run from Sochi.

As for expensive, to buy a set of bell mouths to the quality the ones used in these would cost you around $300.
In fact for the cost of materials, welding, and labour put into this, they should be ALOT more in price.

Plenum - A space where the air velocity is reduced so as to eliminate turbulent airflow prior to being smoothed and accelerated down the velocity stacks.
Airboxes need to be well-sealed and stiff in construction to maintain resonance characteristics. A simple way to illustrate this is to blow across the mouth of an empty bottle. The sound you hear is the natural frequency of a Hemholtz resonator.

[shihad]

pretty sure ke25sr 30hp gaining came from that plenium changing turners and changing dynos as he was still tuning his newly built motor so hard to compare however i am currently building a very near stock blacktop and if i can afford it will buy a bazda plenium and dyno it for all to see.

[FANGIN]

I will gladly offer up my AE111 for you to do comparitive dyno runs both with & without the plenum

[Bling]

I said he needed this but didnt say he had to buy it..

Thing is, someone is asking how to get gains on their car, and you say they need your intake. If I was them I would think I needed it, because you said I did. Until you have proof that your product actually does improve performance I don't think you should be recommending it over tried and proven mods to get gains. Also keep in mind the rules in regards to selling items commercially on here.

There's many more mods that can be done without the need for your intake plenum Cold air to the intake and a free flowing exhaust would be a good start to any modifications. Then you could look at cams and an aftermarket computer. That's what i'd do anyway, people have been making good power without a change in the plenum for a long time.

A search on here will give many examples of what mods people have done and what gains they got. I'd spend my time search for that info before spending any $$$. That said, I'd love to see some dyno plots to see how it does fare as i'm not bagging the plenum, just the lack of proof you have at the moment that its actually an improvement.

[touge_ae101]

i'm just looking to make improvements in the pre-throttle body section of the intake for now.

easily replacable items like plenums, trumpets etc are for a later date when the engine is not so standard. or i don't think i'd be getting good value in terms of extra performance out of the (rather large in my books) investment.

getting power by spending maybe 100bux on a airbox and decent piping is my goal here.
prob would not see a hole lot of gain if the stock airbox is attached to a nice plenum. [/code]

[Bazda]

Sorry I will try to remember not to post any info on things I custom make to improve 4age performance.
I didnt literally mean he 'Needs' the plenum. Sorry for making it sound like that. I will re word the post.

But yes i dont dis agree with you that the mods needed for his application are only small ones needed. Just replace the intake, exhaust, and headers should make good gains.

[Bling]

What actual info / proof have you posted though? I'm just saying post some real proof of the gains for all to see.

Just because someone on Trademe claims their electric turbo gives 4psi boost doesn't mean it does, does it? I'm just saying get some proof, that's all. I'm quite interested in the gains to be had myself. As they aren't the easiest engine to get more horses out of, so any gain is good.