who tracks their Sag?

[clive f]

in the process of making some trackday silencers at the moment for my sag, question is, are people who are using their sags on track running catted or decatted?

cats in will obviously be quieter, but interested if any have cats out and gets away with it, something I am aiming for with my silencer design, as putting the cats back for a trackday isn`t a 5 minute job.

[VARLEYHYD]

Hi Clive,
Mine is de-catted for all uses.

ACT/JP Fully packed 5 1/2" OD
Sleeved=103-105DbA always passes 105. Without sleeve no back pressure created, so unrestricted horrible noise, guess 107+Dba



Noise killers sub 95DbA drive by create sufficient back pressure for silencers to work well; guess could be straight, or various lengths etc; just never got around to trying other stuff


Also Back Box split and loose packed to stop resonance


G

Edited by VARLEYHYD on Wednesday 30th March 11:43

[clive f]

thanks for that graham, interesting on the db test as well,will get mine on the car and do some testing this weekend.

[D14 AYS]

Hi Clive, mine is de catted everything else is standard, mine is around 105db ish! Sags are different gravy on track get some 888's on

[NTEL]

I wonder when SAGRIFF will be here to tell you all he got battered at Oulton Park yesterday by a............................TASMIN

[SAGRIFF]

NTEL said:

I wonder when SAGRIFF will be here to tell you all he got battered at Oulton Park yesterday by a............................TASMIN

in your dreams supercar man.

[SAGRIFF]

clive f said:

thanks for that graham, interesting on the db test as well,will get mine on the car and do some testing this weekend.

Mine standard spec 102db

[clive f]

SAGRIFF said:

Mine standard spec 102db

thanks, has Dave been giving you the runaround?

[SAGRIFF]

clive f said:

thanks, has Dave been giving you the runaround?

yeah, though even my mother driving her micra overtook me yesterday

[NTEL]

Usual excuses...ooh i"ve got a misfire, ooh my tyres are st, ooh my ride heights wrong....ooh.....ooh.

[SAGRIFF]

NTEL said:

Usual excuses...ooh i"ve got a misfire, ooh my tyres are st, ooh my ride heights wrong....ooh.....ooh.

[JxT]

VARLEYHYD said:

Hi Clive,
Mine is de-catted for all uses.

ACT/JP Fully packed 5 1/2" OD
Sleeved=103-105DbA always passes 105. Without sleeve no back pressure created, so unrestricted horrible noise, guess 107+Dba



Noise killers sub 95DbA drive by create sufficient back pressure for silencers to work well; guess could be straight, or various lengths etc; just never got around to trying other stuff


Also Back Box split and loose packed to stop resonance


G

Edited by VARLEYHYD on Wednesday 30th March 11:43

Graham, any mp3s or videos of the noise your car makes with that set up? I can find one on YouTube on a dyno but not sure what the exhaust on the car is at that point, and the sound isnt that great.
Thanks
J

[blackiepaul]

JxT said:

Graham, any mp3s or videos of the noise your car makes with that set up? I can find one on YouTube on a dyno but not sure what the exhaust on the car is at that point, and the sound isnt that great.
Thanks
J

it sounds great - better than in standard form.

[SAGTAFF]

My last trackday was year before last. Limit was 100dbA, I measured 102dbA (standard exhaust fitted) - the guy gave me a wink and let me have my fun!!