What exhausts pass track noise tests without a cat? Turbo

[Redrummo]

i have this exhaust fitted to rev3 tubby with downpipe

Had it tested at about 98db (98.8 i think....) for a trackday at bedford. It was ok (just) for their very strict drive by limit too..... well it was until the downpipe to turbo gasket started to blow and they threw me off......... 3 of the 6 fixing nuts came off i later found out!

[cantfindausername]

I'd like to hear from someone with the Dep2Pro. Interested to see how this differs from the Dep2Regular.

I saw jonb's (I think) trackcar up at lukes on thursday and he had a Dep2 pro on his car.

Anyone else running a Fujitsubo RM01A? It's meant to be a bit noisier than the Legalis R but is also Jasma certified so it's not stupid loud.

Good point. I'll give Jon a shout and see if he's ever had any trouble.

[Goto10]

you can't just put hayward & scott on the list and say its fine! they do complete custom systems to each customers requirements. i have a full custom manifold and cat-less system on my 3vz-fe V6 with quad pipes from a single transversly mounted silencer (355 stylee) and it burbles nicely and growls when provoked, all 4 tips are 3" inwardly rolled. i would say mine would pass, but then every one of thei jobs are generally different! so hard to generalise.

Matt

Yes, they do custom systems, but they also have a basic pattern for an MR2 (from when Ben F had his done many moons ago) - I bought mine in an IMOC group-buy, all of us got trackday friendly exhausts, we just chose which tips we wanted. One guy came along afterwards and specified smaller silencers (for a louder bark) but that was a deviation from their usual pattern.
If you go in there and ask for an MR2 turbo exhaust based on their standard pattern, it will be trackday friendly. So IMO it's perfectly fine for H&S to be on the list.

[afennell]

you can't just put hayward & scott on the list and say its fine! they do complete custom systems to each customers requirements. i have a full custom manifold and cat-less system on my 3vz-fe V6 with quad pipes from a single transversly mounted silencer (355 stylee) and it burbles nicely and growls when provoked, all 4 tips are 3" inwardly rolled. i would say mine would pass, but then every one of thei jobs are generally different! so hard to generalise.

Matt

Yes, they do custom systems, but they also have a basic pattern for an MR2 (from when Ben F had his done many moons ago) - I bought mine in an IMOC group-buy, all of us got trackday friendly exhausts, we just chose which tips we wanted. One guy came along afterwards and specified smaller silencers (for a louder bark) but that was a deviation from their usual pattern.
If you go in there and ask for an MR2 turbo exhaust based on their standard pattern, it will be trackday friendly. So IMO it's perfectly fine for H&S to be on the list.

What that man said, but I do understand what you are saying.

[Antstarr]

Been on brands with a Motoria Japspeed before without a Cat and it passed ok. I changed to a Berk now which is quieter so that would defo be allowed on track too imo.

[toxo]

I would wager that a buddyclub is far far too loud to go on a track! I'll see if I can measure it at the weekend but it's absolutely ludicrous.

Redrummo> You need to replace the nuts on your turbo studs with new ones, they're single use only and someone has reused them

[afennell]

1. Mongoose
2. Fujitsubo Legalis R
3. hks silent hi power
4. Phoenix Power Departure 2 105 db limit past.
5. Hayward & Scott
6. Berk
7. 5Zigen Pro Racer (Jasma Certified)

Way too loud!!
1. Apexi Hayabusa
2. 5Zigen
3. Blitz Nur Spec
4. RSR
5. Rogues Revision6
6. KO Racing (will pass with bung)
7. buddyclub

[jdbecks]

pretty much any exhaust that is jasma approved

pass for track

HKS hi Power


Kakimoto N1R will not pass for track

[Redrummo]

Redrummo> You need to replace the nuts on your turbo studs with new ones, they're single use only and someone has reused them

I did (Didnt know they were single use - better keep an eye on the others!)

[afennell]

pretty much any exhaust that is jasma approved

pass for track

HKS hi Power


Kakimoto N1R will not pass for track

Is it a given a Jasma approved will pass?

[afennell]

1. Mongoose
2. Fujitsubo Legalis R
3. hks silent hi power
4. Phoenix Power Departure 2 105 db limit past.
5. Hayward & Scott
6. Berk
7. 5Zigen Pro Racer (Jasma Certified)
8. HKS Hi Power

Way too loud!!
1. Apexi Hayabusa
2. 5Zigen
3. Blitz Nur Spec
4. RSR
5. Rogues Revision6
6. KO Racing (will pass with bung)
7. buddyclub

[toxo]

Is it a given a Jasma approved will pass?

JASMA pass level is 98dB IIRC. Not sure how they measure it though - presumably on a completely stock car, no decat etc.

[lockys96]

hayward scott ones weigh in at 40kg

[afennell]

im tempted to buy a hks hi power.

I know its been stated to pass above but still unsure what to do.

[afennell]

hayward scott ones weigh in at 40kg

Still waiting to see your pp car in the flesh, are you going to JAE?

[The TVIS Kid]

I have a blueflame (with cat) on mine and to be honest it's not much louder than stock, just has more of a rumble. I would imagine it would pass easily as its pretty much the same as the mongoose.

[Bo]

if i remember correctly, my RS-R measured 105db, with downpipe.
with bung insert and 10 metallic sponges it passed at 89db.

[JM_16v]

any confermation on the Depature 2 Normal with Decat on what DB it passed at?