Improving Intake Sound ....

crzymx · Postby **crzymx** » Thu Mar 05, 2009 8:44 pm

bensale wrote:Why not just drill some holes in your stock air box? I made three one inch holes in the cold side of mine. Its given me the desired sound, similar to a CAI but no where near as loud or angry all the time like the mania one, but still nice and throaty when you want it to be.

I also drilled a few more holes, if you open up about 5-6 one inch holes it sounds about as loud and angry as the mania one, I just left it at three as I think that is a nice medium ground.

Best of all its free and is in my opinion a much better match to a stock exhaust as the mania firewall intake sound overpowers the standard exhaust note. You could also try taking the snorkel off the back of the air box, that gives a bit of growl at WOT with no other mods, but when you do that you pick up hotter air so I put it back on.

Are the holes under the filter?

kazjim · Postby **kazjim** » Thu Mar 05, 2009 9:19 pm

Yep, on the "dirty" side of the filter ....

crzymx · Postby **crzymx** » Fri Mar 06, 2009 12:18 pm

Thats different, if its under its probably not a good idea..

Cheyne made me aware of the new mx5's 'factory firewall intake'.. Interesting huh..

What i would like to maybe gather from this thread in terms of improving intake sound is can the firewall intake be altered to whistle? This i think would be a great addition, not as a conventional mouthpiece whistle type sound but the subtle and slight pitchy intake sound you get with turbo's. Would be interesting dont you think?

RG.net · Postby **RG.net** » Sat Mar 07, 2009 10:28 am

crzymx wrote:Thats different, if its under its probably not a good idea..

Cheyne made me aware of the new mx5's 'factory firewall intake'.. Interesting huh..

What i would like to maybe gather from this thread in terms of improving intake sound is can the firewall intake be altered to whistle? This i think would be a great addition, not as a conventional mouthpiece whistle type sound but the subtle and slight pitchy intake sound you get with turbo's. Would be interesting dont you think?

They make N/A bov's that attach to your exhaust, if you want it to whistle, buy that :roll:

Mr_Q · Postby **Mr_Q** » Sat Mar 07, 2009 3:41 pm

kazjim wrote:The Pic of the Mania CAI shows what looks to be an RX-7 AFM ....

Yeah that was definitely the standard NA8 AFM - that pic is of my old engine.

Sounds like you've already started modding but thought I'd stick in another vote for the Mania CAI. If I ever get another NA it would be the first mod I'd do (just like it was on my last NA).

evil_weevil · Postby **evil_weevil** » Mon Mar 09, 2009 7:22 pm

Is the mania intake easy to fit yourself?

CheyneX5 · Postby **CheyneX5** » Mon Mar 09, 2009 8:25 pm

I did it my self, all you need is a 3 inch holesaw piece, a cool drink and some food :mrgreen:

Took me roughly 20 mins.

crzymx · Postby **crzymx** » Mon Mar 09, 2009 10:32 pm

Or in my case a 76mm holesaw which i think has been outlawed making it very hard to come by when your 'borrowing'. In that case you need a drill and a lot of patience!! See my thread for fitting instructions. viewtopic.php?f=29&t=34875

graemebc · Postby **graemebc** » Mon Mar 09, 2009 10:44 pm

As mentioned before in more than one post
http://autospeed.com/cms/A_110680/artic ... larArticle

How to make a CAI. Cheap nice noise added HP
Search is your friend...

evil_weevil · Postby **evil_weevil** » Tue Mar 10, 2009 11:15 am

Sweet, sounds good, thanbks CheyneX5 and crzymx

Cheers,
Chris

Fuzzlet · Postby **Fuzzlet** » Wed Mar 11, 2009 12:59 am

Dont forget the all important beer to go with the install haha

Chris - you and I could easily install it one afternoon

hejira · Postby **hejira** » Sat Sep 18, 2010 7:00 pm

crzymx - why do you say; 'if its under its probably not a good idea..'

Also has anyone got any pics of the underside of their intake box with the holes drilled? wondering where is the best place for these

bensale · Postby **bensale** » Sat Sep 18, 2010 7:23 pm

I think he's just mistaken and meant over. If you drill under the filter on the dirty side of the intake there are no issues. It's only if you drill into the clean side that there would be an issue as you'd be sucking in unfiltered air.

I don't have any pictures as it'd be impossible to show the holes without pulling the intake box out. Picture the box, on the right hand wall going along the bottom are 3x small one inch holes. I did it on the right side as i figured this was the point furthest away from the exhaust and therefore the coolest spot to get air from. If you're willing to wait a few days I may find some time to pull the box out and take a picture.

hejira · Postby **hejira** » Sat Sep 18, 2010 7:29 pm

i was hoping with so many doing this someone may have taken pics as they did it. all good, thanks for the help. i will probably do this tomorrow cause im keen to retain that growl under throttle that I currently only get when the car is cold. (NB8B).