Spare Tire Well Air Space...

ChopsZ · 08-20-2017, 12:40 AM

Looking into the future, I want to find out what the total air space capabilities I have utilizing the entire spare tire well area for the enclosure(s). I'll be running a pair of 8's, most likely in separate enclosures which will become the false floor.

I'm still debating on whether I'll be going sealed or ported. That will partly depend on the drivers and amount of air space they require. Most or showing up to 1cf ported, some less.

Many thanks in advance for anyone that may have the air space info!

RonRizz · 08-20-2017, 05:47 AM

spare tire well is approximately 2.4 cu ft. I am speaking, of course, of solely the area that the spare would occupy. It is basically wide open under there once you take the foam out surrounding it, as you know from doing your sound deadener.

ChopsZ · 08-20-2017, 09:53 AM

Quote:

Originally Posted by RonRizz

spare tire well is approximately 2.4 cu ft. I am speaking, of course, of solely the area that the spare would occupy. It is basically wide open under there once you take the foam out surrounding it, as you know from doing your sound deadener.

Thanks! That's a great starting point. If I can or need to, I'll also utilize the space of the foam, all the way into the back corners under the taillights.

I'm either going to go with a pair of 8's ported, OR two pairs of 8's sealed or ported depending on the drivers' requirements.

ChopsZ · 08-21-2017, 11:42 PM

I've been thinking about this more. With that kind of air space available, the amount of physical room in that area, and I think the floor height is between 8" to 8.5", I could probably comfortably fit four 10's back there and still have them completely hidden out of view, even with the hatch wide open. It would still look like the stock floor.

Several reasons for running so many subs also... A lot more efficient, they move a lot more air, a lot less strain on the drivers, amp and electrical system, much lower distortion from both drivers and amp, and much better dynamics.

It is not to simply be louder, which is not my goal.

What I'm looking at are four Image Dynamics ID10 V.4 D2. These are dual 2 ohm drivers. The two voice coils of each driver would be wired in parallel for a 1 ohm load, then all four drivers wired in series to come back up to a 4 ohm load for the amp.

With typical cabin gain, just on of these would easily hit a very usable 21 Hz in a 0.4cf sealed enclosure. I would have four of them, in roughly 0.55cf each. Loads and loads of oomph.

ChopsZ · 08-22-2017, 09:27 AM

Possibly even considering a single JL Audio 15W0v3.

RonRizz · 08-22-2017, 05:31 PM

BOOM..lol

ChopsZ · 08-22-2017, 11:37 PM

Quote:

Originally Posted by RonRizz

BOOM..lol

Nope. Nothing like that at all. Just looking to have detail and dynamics. This is all for keeping the sub as musical as possible.

ChopsZ · 08-28-2017, 11:42 PM

Well, it's done... I did it now... I have one of these on the way. And yes, it's 15 inches!

DrNumbers · 08-29-2017, 02:07 AM

Quote:

Originally Posted by ChopsZ

Well, it's done... I did it now... I have one of these on the way. And yes, it's 15 inches!

My oh my... what a big driver you have there!

ChopsZ · 08-29-2017, 03:03 PM

Quote:

Originally Posted by DrNumbers

My oh my... what a big driver you have there!

Yeah... Something like that...

Jayhovah · 08-29-2017, 03:06 PM

This is going to be a redonkulous build.

RonRizz · 08-29-2017, 03:40 PM

Fuzzzy · 08-29-2017, 05:42 PM

------------->

ChopsZ · 08-29-2017, 10:03 PM

Quote:

Originally Posted by Jayhovah

This is going to be a redonkulous build.

To be honest, with all of the research I have been doing for the past couple of months, I have yet to find a single 370Z running a 15" sub. Not to mention a Z running a 15" subwoofer completely concealed under a false floor, keeping it looking bone stock.

Knockoutpie · 08-30-2017, 01:43 PM

image.jpg

I did a 10" solely for the purpose of mounting depth and 3/4" board

I believe we only have 7.75" of total mounting depth we can use for our subwoofer to be flush with the floor. Any larger driver other than a 12" would make it so that I would need spacers on the top of the box for the sub to fit.

Contemplated doing that with a 15" but the cosmetic aspect of a non flush ported subwoofer just wasn't worth it for me.

Gotta have ported to slam.

08-20-2017, 12:40 AM	#1 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	Spare Tire Well Air Space... Looking into the future, I want to find out what the total air space capabilities I have utilizing the entire spare tire well area for the enclosure(s). I'll be running a pair of 8's, most likely in separate enclosures which will become the false floor. I'm still debating on whether I'll be going sealed or ported. That will partly depend on the drivers and amount of air space they require. Most or showing up to 1cf ported, some less. Many thanks in advance for anyone that may have the air space info! __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

08-20-2017, 05:47 AM	#2 (permalink)
RonRizz A True Z Fanatic Join Date: Aug 2011 Location: Pine grove, Pa Posts: 2,136 Drives: 2 feet, 3 pedals Rep Power: 6775	spare tire well is approximately 2.4 cu ft. I am speaking, of course, of solely the area that the spare would occupy. It is basically wide open under there once you take the foam out surrounding it, as you know from doing your sound deadener. ChopsZ likes this. __________________ P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals Last edited by RonRizz; 08-20-2017 at 05:57 AM.

08-21-2017, 11:42 PM	#4 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	I've been thinking about this more. With that kind of air space available, the amount of physical room in that area, and I think the floor height is between 8" to 8.5", I could probably comfortably fit four 10's back there and still have them completely hidden out of view, even with the hatch wide open. It would still look like the stock floor. Several reasons for running so many subs also... A lot more efficient, they move a lot more air, a lot less strain on the drivers, amp and electrical system, much lower distortion from both drivers and amp, and much better dynamics. It is not to simply be louder, which is not my goal. What I'm looking at are four Image Dynamics ID10 V.4 D2. These are dual 2 ohm drivers. The two voice coils of each driver would be wired in parallel for a 1 ohm load, then all four drivers wired in series to come back up to a 4 ohm load for the amp. With typical cabin gain, just on of these would easily hit a very usable 21 Hz in a 0.4cf sealed enclosure. I would have four of them, in roughly 0.55cf each. Loads and loads of oomph. __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

08-22-2017, 09:27 AM	#5 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	Possibly even considering a single JL Audio 15W0v3. __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity Last edited by ChopsZ; 08-22-2017 at 09:43 AM.

08-22-2017, 05:31 PM	#6 (permalink)
RonRizz A True Z Fanatic Join Date: Aug 2011 Location: Pine grove, Pa Posts: 2,136 Drives: 2 feet, 3 pedals Rep Power: 6775	BOOM..lol __________________ P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals

08-28-2017, 11:42 PM	#8 (permalink)
ChopsZ Track Member Join Date: May 2016 Location: Central Florida Age: 49 Posts: 965 Drives: 2016 370Z GM 6MT Rep Power: 2301	Well, it's done... I did it now... I have one of these on the way. And yes, it's 15 inches! __________________ She's For Sale! PERFORMANCE: Aero Workz \| Akebono \| BC Racing \| EcuTek \| HKS \| MaxBore \| Motordyne \| Nismo \| RJM \| SPL \| StopTech \| Z1 AUDIO: Arc Audio \| Bazooka \| Helix \| Pioneer \| Stereo Integrity

08-29-2017, 03:40 PM	#12 (permalink)
RonRizz A True Z Fanatic Join Date: Aug 2011 Location: Pine grove, Pa Posts: 2,136 Drives: 2 feet, 3 pedals Rep Power: 6775	ChopsZ likes this. __________________ P99rs Head Unit--- Amps- 2 Pioneer Prs800d --- Zapco ST1000MX---Zapco ST-4XSQ---- SI BM mk5 Subs---SI TM65v2 Midbass--- SI M3 mids--- SI M25 xbl2 tweeters ----- 2016 MECA street class 3rd place at world finals

08-29-2017, 05:42 PM	#13 (permalink)
Fuzzzy Track Member Join Date: Mar 2014 Location: MS Posts: 876 Drives: 2014 370Z 7AT MR Rep Power: 21860	-------------> ChopsZ likes this.

08-30-2017, 01:43 PM	#15 (permalink)
Knockoutpie Base Member Join Date: Jun 2016 Location: Gilbert Arizona Posts: 93 Drives: 2013 370z Sport Rep Power: 9	image.jpg I did a 10" solely for the purpose of mounting depth and 3/4" board I believe we only have 7.75" of total mounting depth we can use for our subwoofer to be flush with the floor. Any larger driver other than a 12" would make it so that I would need spacers on the top of the box for the sub to fit. Contemplated doing that with a 15" but the cosmetic aspect of a non flush ported subwoofer just wasn't worth it for me. Gotta have ported to slam.

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