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Old 20-12-2006, 10:09 PM   #1
spedwards
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HOW TO: SP20 Intake Modification

Hi guys,

I've been lurking for a while but thought I'd finally join up and leech you for all your valuable information! Introductions aside...

Last night I was reading up on a modification to the top of the grill to allow better air flow to reach the intake snorkel. I'm certain there was some info on AGT, but after a good hour of searching I've not been able to find it again and Google isn't being my friend either.

I was hoping that someone might be able to point me in the right direction for this information.

Cheers
Jon
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Old 20-12-2006, 10:20 PM   #2
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Hi Jon, and welcome to AGT,

- You unscrew the 2 screws holding the grill into the front bumper.
- Pull out the 4 plastic press-clips on the vertical/back edge of the grill to the chassis rail.
- Gently and slowly lift the front of the grill to unpop it off the 3 prongs that hold it down.
- Now sort of pull it out tilted up and away from the car towards you (be carefull of the 2 prongs on the back/vertical edge of the grill that project into the chassis rail).
- Now you get the largest drill bit you can find that will fit between the honeycomb shapes, and drill into and above the tray part of the r/h side of the grill.
You can additionally or optionally dremel out the bottom portion as you see fit aswell. However you will then be allowing hot air to come up from the radiator if you do this without making a duct of sorts to guide the air in better.

If you want to see if this is a worthwhile mod or not. Take the grill out and drive around for a week or so with it out of the car. It will look like poop as you can see the horn and radiator, but you will get good ram air and much better fuel economy. So try it out for a couple of tanks and see how you go before commiting a drill or blade to your precious grill.

Enjoy,
Gav.
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Old 20-12-2006, 11:12 PM   #3
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im sure this is what ur after :
http://www.clubprotege.com/forum/showthread.php?t=1977
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Old 30-05-2009, 08:27 PM   #4
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eh brasileiro?!!
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Old 04-11-2009, 08:41 PM   #5
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ooops i just did the mod using a drill + spade bit and regular bits to grind off the leftovers, then stanley knifed the rest. stanley knifing it alone is far too slow in the cramped space. the plastic is actually pretty stiff too..

my stupid mistake was in leaving the grill attached to the car, now i have plastic shavings everywhere and in the aircon radiator too
what's the process to remove the grille? (BJ series protege 1.8L)
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Old 21-12-2006, 08:24 AM   #6
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Hi and thanks for the welcome Gav, those instructions are great. I had a quick look last night and gave up trying to work it out. I have a Dremel with a large assortment of attachments so will probably get into it with them.

I've just put the K&N replacement panel filter in and will let that run for a while to see if there are any fuel usage improvements. I noticed that engine temps seem to be a little lower than I remember them usually being this morning, but that could just be a bad memory. Probably look at doing this early in the new year I think...

That's the one Arden! I must have seen people mentioning it being done here and joined the dots incorrectly. Page is now bookmarked!
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Old 21-12-2006, 08:30 AM   #7
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You can also remove the big fat bong shaped resonator.... i found a lid from a paint can, and electrical tape was perfect for plugging the hole on mine Ghetto ftw!
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Old 21-12-2006, 08:35 AM   #8
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Ghetto sounds good, I was probably going to follow up with questions about resonator removal I had read that that resonator played a part in improving the low down torque, is this not the case?

I like cars and going fast but I've really got no idea what I'm doing
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Old 21-12-2006, 08:51 AM   #9
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Quote:
Originally Posted by spedwards
Ghetto sounds good, I was probably going to follow up with questions about resonator removal I had read that that resonator played a part in improving the low down torque, is this not the case?

I like cars and going fast but I've really got no idea what I'm doing
Resonator plays the part of quieting the whole thing down..its a tuned baffle..

by removing it you are removing a restriction. Restriction may artificially give you a bit more down low, but what it costs you up high is insane.

Also by removing it you shorten the whole system a bit... shorter air intake = better throttle response.....difference between my car with the standard system on (modified), to when i put the VERY short ram intake on is crazy in the throttle response department..

Plus removing the res makes the car sound a bit better So... pass the bong - to the bin
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Old 21-12-2006, 08:53 AM   #10
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Cool! I can see this is the place to be for all my SP20 needs
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Old 26-12-2006, 02:15 PM   #11
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Quote:
Originally Posted by LordWorm
Resonator plays the part of quieting the whole thing down..its a tuned baffle..

by removing it you are removing a restriction. Restriction may artificially give you a bit more down low, but what it costs you up high is insane.

Also by removing it you shorten the whole system a bit... shorter air intake = better throttle response.....difference between my car with the standard system on (modified), to when i put the VERY short ram intake on is crazy in the throttle response department..

Plus removing the res makes the car sound a bit better So... pass the bong - to the bin
So where is this resinator located?
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Old 26-12-2006, 03:04 PM   #12
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Quote:
Originally Posted by DB0984
So where is this resinator located?
from *memory*...its like this:


pull the part of the intake system off that sits above the radiator

then remove the airbox

you'll be left with a right angle pipe, with a bong hanging off the end of it.

pull off the bong and plug up the hole

put the rest back on

its either attached to the right angle bit, or the bit just past the right angle bit..
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Old 27-12-2006, 11:18 AM   #13
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Quote:
Originally Posted by LordWorm
You can also remove the big fat bong shaped resonator.... i found a lid from a paint can, and electrical tape was perfect for plugging the hole on mine Ghetto ftw!
Not a very wise idea.

Ever heard of Helmholt resonance...?

AVOIDING this resonance is the reason why manufacturers use the resonator box.

When you remove it, you hear more induction noise. This is due to a coarser air flow into the AFM. The resonator smooths this air flow allowing more air down the pipe for its given diameter.

They are very common on NA cars especially in F1 where air speed along a pipe is critical.

Here is a web site to explain the technicalities of "that little box" > Here <

If you shorten the intake tract with (say) a pod filter, then you shift the resonant frequency up beyond the rev range so its not an issue.

However, if you keep the longer intake tract (standard pipe work) then the resonant frequency of that intake tract is lower & (usually) within the RPM range of the engine. Thus the need of the Helmholtz resonator to overcome it.

REgards
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Old 27-12-2006, 11:29 AM   #14
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Quote:
Originally Posted by WAR-20B
Not a very wise idea.

Ever heard of Helmholt resonance...?

AVOIDING this resonance is the reason why manufacturers use the resonator box.

When you remove it, you hear more induction noise. This is due to a coarser air flow into the AFM. The resonator smooths this air flow allowing more air down the pipe for its given diameter.

They are very common on NA cars especially in F1 where air speed along a pipe is critical.

Here is a web site to explain the technicalities of "that little box" > Here <

If you shorten the intake tract with (say) a pod filter, then you shift the resonant frequency up beyond the rev range so its not an issue.

However, if you keep the longer intake tract (standard pipe work) then the resonant frequency of that intake tract is lower & (usually) within the RPM range of the engine. Thus the need of the Helmholtz resonator to overcome it.

REgards
Proven additional mile an hour at the track - which is a good indication of an increase in power.

Crack it open and hav a look at it, its NOT going to smooth out the airflow in a pink fit. no way known. It is a massive restriction. Don't believe me? shove it on a flow bench.

Yes it makes your intake more noisey. By removing it you are making the intake tract shorter. considerably shorter.

Smooth air flow is also *impossible* to achieve on our standard pipe work. Beyond the airbox, it goes through a corigated pipe.

Stripping resonators out of cars for cheap/free power has been done for ages, and is a proven way to gain a bit of extra throttle response and maybe a small hit of power.

I have removed the resonator, and am making more power. Be that because the pipe work is shorter, more direct and less turbulent, or because the pipework is shorter and thus the air doesn't have as much time to heat up, or a combination of both, its definantly given a noticable gain.
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Old 27-12-2006, 05:40 PM   #15
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Anybody got pics on how to do this mod?

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Old 27-12-2006, 05:42 PM   #16
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Quote:
Originally Posted by Melbastina
Anybody got pics on how to do this mod?

Next time i've got the intake off i'll show pics of it in pieces...but its pretty easy to work out without photos....just remove the bong :P
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Old 21-12-2006, 09:02 AM   #17
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check out msprotege.com
for much more info.
the sp20 hatch is known as the protege5 in the u.s
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Old 21-12-2006, 09:16 AM   #18
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Yeh the yanks have all the info on MSP....stacks of Protege5/SP20 "howto's" for diy performance and visual mods
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Old 21-12-2006, 10:12 AM   #19
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Another thing you can do aswell as the bong removal is: Unscrew the 2 havles of the large intake scoop, and get some tape and block off the other resonator chambers. I have done this, and it made absolutely not a single fuggin difference, so I would say only to do it out of a labour of love for farken around, but not to expect anything wonderful from it...

Gav.
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Old 21-12-2006, 10:16 AM   #20
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Quote:
Originally Posted by chicaboo
Another thing you can do aswell as the bong removal is: Unscrew the 2 havles of the large intake scoop, and get some tape and block off the other resonator chambers. I have done this, and it made absolutely not a single fuggin difference, so I would say only to do it out of a labour of love for farken around, but not to expect anything wonderful from it...

Gav.
yeh you can only push that little snorkel so far

eventually you start wasting your time with it.


big fat bong resonator does make a difference....as does drilling out the grill (my grill is bodgy drilled, but you still couldn't tell without knowing exactly what to look for...)
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