Project MIDTRBO (Page 21/35)
ALLTRBO NOV 07, 11:52 AM

quote
Originally posted by Rallaster:
You want 10's. The additional weight is going to be negligible with the amount of power your Turbo 6 is going to be putting to the pavement.
/concern



It's not just the power/weight ratio, I'm more concerned about the handling. While the weight will be fairly centralized, it's still extra weight, and that puts more stress on everything.

The Pioneer shallow 10's I have weigh 25lbs for both, and the extra-shallow 8's I'm looking at weigh 8lbs for both. I guessing the boxes for the 10's would weigh about 10 lbs extra for both, compared to the boxes for the 8's. That's ~27 lbs total. While not seeming like much, it all adds up, I'm adding a lot of weight to this car, but trying to keep the increase minimal. Leaving out subs altogether is not an option, and my symmetry obsession states that I have to have one on each side.
The 8's are also shallower so would save me about an inch behind each seat.

Here are the 10's I have-
http://www.pioneerelectroni...ers/Shallow/TS-SW251

And here are the 8's, they are direct replacements for the underseat subs on some BMW's. Lots of people are very happy (and impressed) with these subs. (Click on SWS-8 down at the bottom)
http://www.earthquakesound....virtuemart&Itemid=82

Either pair would be using the Pioneer amp I bought for the car. It would overdrive the 8's if I let it, but I wouldn't, and there's probably a decent bit of error margin built into the subs anyway. For the 10's wired in parallel (2-ohms), it is the perfect amp.

I'm mostly typing this out for my future reference, it helps to have it laid out in front of me, but also for anyone interested.
I'll decide eventually.

As for MIDTRBO updates, I'm waiting for Dave to recover from the apparently insane amount of BMW (etc.) work that he's been getting in.


------------------

'10 Camaro LT/RS, 312hp V6 6-speed
'88 Fiero GT - coming soon! - Project MIDTRBO

The rest of my cars are for sale
There's no replacement for turbo placement

[This message has been edited by ALLTRBO (edited 11-08-2010).]

tonycampbell86gt NOV 07, 06:46 PM
I have one of the SWS-10's behind the passenger's seat of my 86 GT with about 150 watts on it, and it slams pretty good for such a small box.

Tony
ALLTRBO NOV 08, 08:07 PM
Cool, thanks for chiming in. What is your box's internal volume?

[This message has been edited by ALLTRBO (edited 11-08-2010).]

tonycampbell86gt NOV 10, 07:57 PM
Roughly .5 cubic feet. Outside dimensions are 27" tall, 20" wide, and 3.5" thick.

I haven't had much time to fool with it, but this winter I am going to build a box to put it in the factory location. With the shallow depth of the sub, I might be able to get it flush with the bottom of the dash.

Tony
ALLTRBO NOV 13, 11:02 PM
Thanks Tony, that gives me a good physical comparison.


Well there's not much to do while sitting here in pain, so I figured I'd digitally load up Amida's Fi 512TR nose and Whodeanie's production F355 bumper onto my Fiero (though the color is still 'wrong' as previously mentioned).
I used pics of a real 512TR and F355 for this PS.
With some design of matching sideskirts, I think these will look fantastic together.

I like it. Lemme know what you think.

[This message has been edited by ALLTRBO (edited 11-14-2010).]

Rallaster NOV 14, 10:58 AM

quote
Originally posted by ALLTRBO:

Thanks Tony, that gives me a good physical comparison.


Well there's not much to do while sitting here in pain, so I figured I'd digitally load up Amida's Fi 512TR nose and Whodeanie's production F355 bumper onto my Fiero (though the color is still 'wrong' as previously mentioned).
I used pics of a real 512TR and F355 for this PS.
With some design of matching sideskirts, I think these will look fantastic together.

I like it. Lemme know what you think.
dobey NOV 14, 11:20 AM

quote
Originally posted by tonycampbell86gt:

Roughly .5 cubic feet. Outside dimensions are 27" tall, 20" wide, and 3.5" thick.

I haven't had much time to fool with it, but this winter I am going to build a box to put it in the factory location. With the shallow depth of the sub, I might be able to get it flush with the bottom of the dash.

Tony



Wow. The SWS-10 looks like it wants 3x that for box volume. And the SWS-8 is still rated at about 1.0 cu ft. But with only 0.5 cu ft available, the 8 would probably sound 100x better than the 10 does.

But this is why I tell people that depending on where in the passenger cabin you mount the sub, a 6.5" or 8" is really the largest you want to go.
tonycampbell86gt NOV 14, 02:04 PM

quote
Originally posted by dobey:


Wow. The SWS-10 looks like it wants 3x that for box volume. And the SWS-8 is still rated at about 1.0 cu ft. But with only 0.5 cu ft available, the 8 would probably sound 100x better than the 10 does.

But this is why I tell people that depending on where in the passenger cabin you mount the sub, a 6.5" or 8" is really the largest you want to go.



Odd. The documentation with the sub actually calls for a minimum sealed volume of 0.38, and a maximum sealed volume of 0.75 for the 10".

Tony

Will NOV 14, 03:07 PM
There are a whole lot of compromises in both driver and box design to accomodate small boxes, not the least of which is that of proper volume. A given driver might produce acceptable results in a box that small, but the proper design based on Thiele-Small parameters to give a good response curve would have a much greater volume.

As I recall from my box building days, 1/2 cf is a tiny box even for an 8" driver.

[This message has been edited by Will (edited 11-14-2010).]

bmwguru NOV 23, 08:08 AM
just a quick update (should have been done two weeks ago, but we have been going nuts here). Anyway, we fabricated a custom battery mount using Steven's battery spec. He wanted the battery as far down and close to the windshield as possible, so here is what we came up with.





and this is what I see when I come home.....I think my dog is saying I don't spend enough time with her.