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20-12-2006, 10:09 PM | #1 |
Junior Member
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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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20-12-2006, 10:20 PM | #2 |
Senior Member
Join Date: Sep 2004
Location: Logan prefecture
Car: Touge monster
Posts: 7,585
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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. |
20-12-2006, 11:12 PM | #3 |
Senior Member
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im sure this is what ur after :
http://www.clubprotege.com/forum/showthread.php?t=1977 |
30-05-2009, 08:27 PM | #4 |
Junior Member
Join Date: May 2009
Location: adelaide
Car: mazda
Posts: 3
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eh brasileiro?!!
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04-11-2009, 08:41 PM | #5 |
Junior Member
Join Date: Apr 2009
Location: 2153, Baulkham Hills AU
Car: nothing :(
Posts: 10
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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) |
21-12-2006, 08:24 AM | #6 |
Junior Member
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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! |
21-12-2006, 08:30 AM | #7 |
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Join Date: Feb 2006
Location: .
Car: .
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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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21-12-2006, 08:35 AM | #8 |
Junior Member
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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 |
21-12-2006, 08:51 AM | #9 | |
Senior Member
Join Date: Feb 2006
Location: .
Car: .
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Quote:
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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21-12-2006, 08:53 AM | #10 |
Junior Member
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Cool! I can see this is the place to be for all my SP20 needs
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26-12-2006, 02:15 PM | #11 | |
Boostin Member
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Quote:
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94 Ford Laser XL - Trent 03 Mazda Astina SP20 - Sam 06 Mazda 3 MPS - Miff Now happily boostin |
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26-12-2006, 03:04 PM | #12 | |
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Join Date: Feb 2006
Location: .
Car: .
Posts: 1,689
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Quote:
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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27-12-2006, 11:18 AM | #13 | |
Junior Member
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Quote:
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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27-12-2006, 11:29 AM | #14 | |
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Join Date: Feb 2006
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Quote:
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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27-12-2006, 05:40 PM | #15 |
AstinaGT Regular
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Anybody got pics on how to do this mod?
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BJ Astina (Shades pack) stock other than the K&N Panel Filter, Tint, Fog Lights, Clarion fronts, Alpine rears, scuff plates, clear side indicators, VisionPlus and silver vision globes. |
27-12-2006, 05:42 PM | #16 | |
Senior Member
Join Date: Feb 2006
Location: .
Car: .
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Quote:
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21-12-2006, 09:02 AM | #17 |
Senior Member
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check out msprotege.com
for much more info. the sp20 hatch is known as the protege5 in the u.s |
21-12-2006, 09:16 AM | #18 |
Senior Member
Join Date: Feb 2006
Location: .
Car: .
Posts: 1,689
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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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21-12-2006, 10:12 AM | #19 |
Senior Member
Join Date: Sep 2004
Location: Logan prefecture
Car: Touge monster
Posts: 7,585
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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. |
21-12-2006, 10:16 AM | #20 | |
Senior Member
Join Date: Feb 2006
Location: .
Car: .
Posts: 1,689
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Quote:
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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