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My DIY Cold Air Box


jevansio

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Good work Jay,nice and simple to ram the air in ,might get the pipework done on mine.

Cheers Stu, did some calc earlier today to guess the rough performance of this setup, 1st up the amount of air a 3.0 @ 1.6 BAR ingests in litres/sec at various rpms

 

rpm 0	1000	2000	3000	4000	5000	6000	7000	8000
ltr 0	40	80	120	160	200	240	280	320

 

Next the amout of air the tube can provide at varying vehicle speeds (assuming the amount of air = the volume a 4" circle travelling at vehicle speed covers)

 

mph	0	20	40	60	80	100	120	140	160	180	200
ltr	0	70	140	211	281	351	421	491	562	632	702

 

So hopefull anything over 100 it should be ramming at least enough air no matter what the engine speed, and between 60-100 should be supplying enough if my gear is sensible (ie not screaming along in 2nd @ 8k :D)

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Todays progress.

 

Started by making the angle bracket that holds the two pieces together, also started on the template for the lid

 

attachment.php?attachmentid=107636&stc=1&d=1270230368

 

Next up the lid cut, (I used 2mm aluminium BTW)

 

attachment.php?attachmentid=107637&stc=1&d=1270230368

 

Then the hole cut for the intake pipe, I cut it big so I could use some rubber strip to get a flexible airtight seal

 

attachment.php?attachmentid=107638&stc=1&d=1270230368

 

Next the lid was cut to shape & bent

 

attachment.php?attachmentid=107639&stc=1&d=1270230368

 

I nearly called it a day at this point as I didn't have enough rubber strip to trim the edges. I went down my good friend Paul Woods & he kindly let me take as much door strip/boot rubber from an MR2 he had. The boot rubber is perfect for the intake hole due to it's flexible seal, and the door seal was great for trimming the other edges.

 

A pic of the side trimmed up & ready to install

 

attachment.php?attachmentid=107640&stc=1&d=1270230368

 

Finally a couple of the pics with the lid taped in place

 

attachment.php?attachmentid=107641&stc=1&d=1270230368

 

attachment.php?attachmentid=107642&stc=1&d=1270230368

 

attachment.php?attachmentid=107643&stc=1&d=1270230368

 

Tomorrows taks is to make some edges so the lid fits like a "shoe box lid" and to make brackets to secure the lid in place :)

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Box looks great though mate, well done. Real quality build. Truly inspirational.

 

Would inspire me to do something with my filter on the stock setup if I still had a Supra...

Many thanks :thumbs:

 

It really looks cool when the bonnet is up & you stand back, I will get better pics with it all polished up when it's complete tomorrow :)

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:blink: Thats fucking huge j :D

 

I like your resourcefulness! gotta take my hat off for thinking of using a boot rubber seal from a mr2 :lol:

 

Nicely done

Lol, it is a bit, then again the filter is feckin huge too :D

 

It's wasn't my idea, it was Woods, I would never have though of that :D

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Next stage= built in refrigeration ;) nice job Jay:thumbs:

:D, only if it keeps my beers cold too :D

 

Looking forward to seeing what difference it makes on the road,

 

On a side note, today I cut my intake pipe so that it finished as soon as it enters the air filter, previously it stuck a good couple of inches inside the filter. Boy what a difference in noise, I mean quieter, if you want some induction noise have your intake pipe shoved further into the filter, might be crap for a smooth airflow, but boy does it sound :D

Edited by jevansio (see edit history)
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  • 2 weeks later...

Right I finished this off tonight.

 

1st up to hold the lid on I riveted some brackets onto the sides. On each bracket I used some captive nuts so that I could use bolts through the lid to simplfy fitting.

 

attachment.php?attachmentid=108175&stc=1&d=1271269421

 

attachment.php?attachmentid=108176&stc=1&d=1271269421

 

I remade the lid as I kind of fecked up the 1st one. 2nd time around I did it perfect and only used 2 of the 4 brackets as it was so secure. It kept the lid looking cleaner too:

 

attachment.php?attachmentid=108177&stc=1&d=1271269421

 

attachment.php?attachmentid=108178&stc=1&d=1271269421

 

attachment.php?attachmentid=108179&stc=1&d=1271269421

 

I've got some heat reflective tape from my mate which I will use on the sides, which will not only keep heat out but cover the untidy rivets, but other than that it's done :)

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