[khamai]

When Chris & I were at LCU a few months back we both picked-up the StageII system. It's LIGHT! 14lbs is probably about right. But, don't know how "loud" it is.

Still have the mp3 of the stock system taken from the vid of Randy's autoX run at the WCLM here...

http://ns1.freeapp.net/~gglotus/cnbcvid/

Kiyoshi

 

[adamant]

Is there a dB rating for the stock exhaust to compare against the other values. I would like to lose the weight for a stage 1. Stage 2 could be into the hearing damage levels though.(and I like my neighbours)

 

[HOCKYDOC]

WOA! That black car cover looks like a big wet suit! That's awesome!

I believe that cover is just a dust protector for inside. Does not protect against weather or UV light.
Check out the sector111.com site for better descriptions of available covers.

 

[Randy Chase]

Standard exhaust is rated at 93dB.

Both Stock and Stage 1 are 25 pounds.

Stage 2 is about 15 pounds and 105dB and for competition use only (not for street).

 

[mikester]

After quite a bit of searching, I came up with this as a likely answer to the question of what distance from the exhaust tip these sound pressure levels (noise levels) are measured:

....The legislation require the use of Society of Automotive Engineers test procedure J1169, which employs the A-weighted dB scale to measure exhaust sound--based on 95 decibels at 20 inches. ...

I don't know why 20 inches, but this seems to be the standard for auto exhausts. I would have guessed a distance of 1 meter, as this is generally the distance from which reference noise measurements are taken for equipment (pumps, fans, motors etc.).

 

[LarryB]

It's nice when these types of question come up we can get "offical" answers from Lotus. Thanks Randy.

 

[Randy Chase]

Anyone have the conversion for translating that to 75 feet away? I *know* how loud 93dB is at 75 feet, but I don't know how loud a 93dB exhaust at 20" is.

 

[ivan1]

Standard exhaust is rated at 93dB.

Both Stock and Stage 1 are 25 pounds.

Stage 2 is about 15 pounds and 105dB and for competition use only (not for street).

surprised that stage 1 is not lighter than stock. I thought they had said any performance gain from stage 1 was related only to difference in weight as the stock exhaust was already optimized.Would that mean there is no performance gain from stage 1, just a better sound????

 

[Derek]

Standard exhaust is rated at 93dB.

Both Stock and Stage 1 are 25 pounds.

Stage 2 is about 15 pounds and 105dB and for competition use only (not for street).

My dealer said stage I is 24 lbs lighter than stock. I also heard nothing about comp use only?

Where did you hear this information? Are you sure? If so the dealers are spreading wrong information as more than one person here has reported similar specs.

 

[LarryB]

The number I'd dug up was a 6db drop for every doubling of distance. So in the case of the Stage II at 105db, at 75 ft I'd guess it'll be a good 27 db down.

From what I'd heard early on stage I was better looking, nicer tips. 4db will be noticeable but fairly minor gain is sound level but no real preformance gain.

 

[Dan]

Standard exhaust is rated at 93dB.

Both Stock and Stage 1 are 25 pounds.

Stage 2 is about 15 pounds and 105dB and for competition use only (not for street).

That means Stage 2 is about twice as loud as stock, so if you want a loudness demo, play a video of the stock exhaust at 2x the volume.

 

[atyclb]

stage 1:

stage 2:

 

[wallabyguy]

Anyone else interested in the Custom Interior Items? How custom are we talking here? Anyone figure out a IPod adapter Yet? I know someone was working on it.

Has anyone seen or know what the center console is or looks like that continues to be referred to on this thread?

 

[Patricko]

If so the dealers are spreading wrong information as more than one person here has reported similar specs.

That has never happened before

 

[Dan]

Has anyone seen or know what the center console is or looks like that continues to be referred to on this thread?

Is this it?:

 

[mikester]

Based on a dropoff rate of 6 dB/doubling of distance (which is a good assumption in the free field for a point source such as an exhaust) the decrease in noise level would be 33 dB, from 20 inches to 75 feet.

So an exhaust putting out 93 dBA at 20 inches would be equivalent to 60 dBA at 75 feet. One caveat: an exhaust in the real world is not in the "free field" (i.e., a space free of reflecting surfaces etc.), so in fact the noise level could be as much as 3 dB higher, potentially even a bit more because of other complicating factors. But that's a good estimate, anyway.

 

[atyclb]

Is this it?:

yep, that's the leather-wrapped center console

 

[Randy Chase]

My dealer said stage I is 24 lbs lighter than stock. I also heard nothing about comp use only?

Where did you hear this information? Are you sure? If so the dealers are spreading wrong information as more than one person here has reported similar specs.

Heard from Lotus.

Am I Sure? I am never sure. But I believe Lotus more than dealers.

 

[mact3333]

is the leather wrapped center console stock or an option????....I need that!....wow, didnt know all these options were available...I need clearless bra, HID, st II exhaust and now ceneter console..guess theres one advantage of getting car next yr..

 

[wallabyguy]

I'll be passing on the leather console. I think it takes something away from the purity of the interior.