ITB owners only need apply

[sexy_gt]

ive never had an issue with sound limits on trackdays but since i have fit my bodies im a little concerned. its ok passing the static tests but some circuits use a drive by limit too. i know bedford gt is 87.5db at 30ft. i drive there a lot. they have a one strike and your out rule! :panic:

any of the lads on here have sound limit issues with induction? my car is loud even with the filter on. i have seen some large box enclosures on a few other cars. are these to shut the buggers up when required or just a form of filtration?

stew :y:

[Ryan]

mine is very loud. So generally I avoided drive by tracks where I know they are hot on it.

One method is to lift off where the meter is (not ideal)

The airbox will reduce the noise alot (it did with Bic)

[adamskiTNR]

Yeah a common problem with itb's. statics usually pass as they are at the other end of the car. This is why a lot of caterham/westfield owners run plenums, as the inlets point straight out the side of the car towards the meter. I would definitely consider running a good plenum or box if you can't afford to go to less restricted tracks

[sexy_gt]

i may modify a cereal box lol

[AdamH]

is this for your atpower bodies? may be worth asking bic to see if he can make up some carbon ones or even grp if he deals with that?

[Ryan]

is this for your atpower bodies? may be worth asking bic to see if he can make up some carbon ones or even grp if he deals with that?

if you want to pay OTT prices.

There are a few off the shelf units that could be modified, or due to the AT design with the screw on horns plenty of people could even make one

[AdamH]

may be worth contacting a few companys with some technical drawings then..

mentioned bic as he would be more then up for making a box but i agree with you on the price part.

(is it possible to get a box and not cut the scuttle? i cant remember if jp had his cut?)

[AndySAXO]

Yer it will not effect the noise test before but can effect when they test during the track day, are you using a filter?

I have been ok and at cadwell, it was fine, I think 100 dB is alot more than 87, should be ok dont worry too much.

[Ryan]

if you want any decent trumpet length with straight trumpets you need the scuttle cut.

The old GMC kit used 180degree curved trumpets enclosed in the box which is what yates and josh have.

it was a completely designed system by john to run with the jevney bodies not a real off the shelf item.

The issue with the ATs is the ram pipes point directly at the brake bar due to how they were designed (on a head but on in an engine bay) so even though they are designed for direct airflow to valve there have been a few issues with them in an engine bay.

[dannygti]

with open trumpets you will NOT pass the drive by, my car was seriously loud. however with a proper airbox or chunky filter you should get away with it, although it would be touch and go for very quiet days.

[AndySAXO]

Nothing wrong with flow just can't add lenght to them you can but will never be able to use a filter, but you can run longer truppets like, toads old ones. But I will and think should always use a filter.

I have spoken to some people and fab some new inlets, for the at to bolt on to get a better angle to get long length, and still run a filter, but it still work in progress,

[AndySAXO]

Yer Danny only on drive by test static test will still be ok as it measure from the exhaust, but yer full song on drive by test at a quoted track day it will be touch and go, but should be ok on 100dB track days.

[Ryan]

Nothing wrong with flow just can't add lenght to them you can but will never be able to use a filter, but you can run longer truppets like, toads old ones. But I will and think should always use a filter.
,

I never said there was anything wrong with the flow of them, but that the design was based around the head and not around the engine bay aswell, which is why there is the brake bar issue.

The issue is with the airbox with the brake bar being there it really reduces the space you are working with as unlike the old gmc kit the set up isnt using curved trumpets.

[sexy_gt]

i have the atpower bodies and filter too. the filter is 3/4inch thick at a guess. i havnt heard it without. not paying bic a penny tho. over priced yet well made gear. i will make something and insulate it if i need to. i guess i can work my way up the rev range as i pass DB meters on track. they do give a warning if you get close.

im usually 96db on 4,500 rpm static but drive by is completely different as said.

[sexy_gt]

I never said there was anything wrong with the flow of them, but that the design was based around the head and not around the engine bay aswell, which is why there is the brake bar issue.

The issue is with the airbox with the brake bar being there it really reduces the space you are working with as unlike the old gmc kit the set up isnt using curved trumpets.

im sure i could cut and resape the brake bar to accomodate if need be. i have the standard length bodies.

[AndySAXO]

Yer miss read your post, I believe these where never tested in the engine bay before selling, which really should have been to get maybe a better angle and more testing involed.

John will never agree and will not tell you this good kit, but maybe more testing was needed, like I said I am looking into getting a better angle but will need testing aswell to make sure, nothing lost too with flow.

[Tufty]

What about F1 days then? They are very loud....
I take it there is no limit for them?
Think i could be in trouble, mine seems so so loud!

[AndySAXO]

96dB have you got a middle box? My is 86dB with bodies supersprint with middle box.

[AdamH]

anyone have a picture of how close it is to the bar?

[AndySAXO]

Yer if you ent using a middle box get one, it will help.

[AndySAXO]

It ok, with standard at lenght truppets can just get the filter on and off, but any longer will struggle to get a filter.

[sexy_gt]

96dB have you got a middle box? My is 86dB with bodies supersprint with middle box.

saxsport

wouldnt change for the world :)

has two boxes. im sure middle is straight through.

[AndySAXO]

Yer not saying change it but if the middle box has no baffles then get one with to get the noise down.

[Ryan]

Yer miss read your post, I believe these where never tested in the engine bay before selling, which really should have been to get maybe a better angle and more testing involed.

John will never agree and will not tell you this good kit, but maybe more testing was needed, like I said I am looking into getting a better angle but will need testing aswell to make sure, nothing lost too with flow.

Dont think it was Johns fault tbh. He sent a head to them and they designed it to give optimum performance to the valve. It was a slight oversight to not have engine bay specs but then its an issue im sure no one saw happening. Not easy when johns in scotland and they are based near Norwich iirc.

Its a shame Johns not selling the old kit anymore ok some forums slated it but overall i think it wasnt a bad solution for performance and decent noise levels.

[Ryan]

What about F1 days then? They are very loud....
I take it there is no limit for them?
Think i could be in trouble, mine seems so so loud!

its different for racing days.

+ places like bedford wouldnt host F1.

The reason its so tight there is the Db meters are linked to the council I have been lead to believe so they cant just let things go

[sexy_gt]

its different for racing days.

+ places like bedford wouldnt host F1.

The reason its so tight there is the Db meters are linked to the council I have been lead to believe so they cant just let things go

all true ;)

bedfors is a fast track tho would suit some real power cars

[Ryan]

anyone have a picture of how close it is to the bar?

Very old/rough pic/angles obviously not great but was for an idea

http://i4.photobucket.com/albums/y135/itsafastworld85/ATpowaaaa.jpg

[sexy_gt]

just out of interest did you have any issues with throttle being very sticky when you did the bolts u tight on those? i did :(

[AndySAXO]

Need to get two clips each side on the throttle adjuster to stop it catching. But it not sticky at all well not on mine.

[Ryan]

just out of interest did you have any issues with throttle being very sticky when you did the bolts u tight on those? i did :(

I dont have At bodies ive got pugsport ones.

It was just a pic that came up into a discussion about this before.

[Dave_P]

That TB pic above is Steve's 106 Rallye, its currently sitting in my garage. :)

http://i334.photobucket.com/albums/m433/16v_rallye/IMG_0125.jpg

[Ryan]

That TB pic above is Steve's 106 Rallye, its currently sitting in my garage. :)

http://i334.photobucket.com/albums/m433/16v_rallye/IMG_0125.jpg

yeah was when he was trial fitting them, wasnt sure he wanted his name advertised so i didnt say lol.

Has it been finished yet/nearly there?

[jpsaxo]

I have no problems with my TB set up on static and drive by tests :D

[sexy_gt]

what filtration do you run and at what tracks?

[jpsaxo]

Check my project thread in my sig mate. Its the gmc curved trumpet and airbox set up.

Ive done loads of different tracks never had any problems

[AndySAXO]

Yer I had no problem too, but would suggest if you have a straight though get s middle box, will bring the exhaust noise down.

[Ryan]

I have no problems with my TB set up on static and drive by tests :D

but you yurn for more noise from them at times :zainy:

[Dave_P]

Has it been finished yet/nearly there?

Kinda nearly there.

[jpsaxo]

but you yurn for more noise from them at times :zainy:

Not now I dont, with the carbon roof its bloody loud, I have to wear ear plugs on the ring trips lol

[Ryan]

didnt see you had gone and helped bic pay for a new house ;)

I took earplugs in mine to the ring, on the long drive down it needed them. Open bodies FTW :D

[Tufty]

didnt see you had gone and helped bic pay for a new house ;)

I took earplugs in mine to the ring, on the long drive down it needed them. Open bodies FTW :D

I think this could well be a problem when doing some trips to shows/tracks! Ear defenders! Haha :y:

Ryan, whats going on with your saxo atm? You had ECU problems didnt you? or something

[Ryan]

I think this could well be a problem when doing some trips to shows/tracks! Ear defenders! Haha :y:

Ryan, whats going on with your saxo atm? You had ECU problems didnt you? or something

I just take ear plugs with me. A guy I know his F1, now that has sets of ear defenders in it lol!

I had ecu/wiring problems. The ECU was tested by dave walker and apparently all was fine. The cars mostly been rewired, just having someone work on an adaptor loom and hopefully have the engine firing again. Then its get the car in road worthy condition again after an effective 2 years of sitting there.

[Tufty]

I just take ear plugs with me. A guy I know his F1, now that has sets of ear defenders in it lol!

I had ecu/wiring problems. The ECU was tested by dave walker and apparently all was fine. The cars mostly been rewired, just having someone work on an adaptor loom and hopefully have the engine firing again. Then its get the car in road worthy condition again after an effective 2 years of sitting there.

Lmao! i bet.

Argh fair play mate, How comes you have taken down those track day vids? says i need to log into your photobucket when i try watching them lol. Can you link me up with some again?

It has not moved in two years?
Not even turned the engine?

[Ryan]

Lmao! i bet.

Argh fair play mate, How comes you have taken down those track day vids? says i need to log into your photobucket when i try watching them lol. Can you link me up with some again?

It has not moved in two years?
Not even turned the engine?

should still be there, will have a nose.

Engine turned over on the pred last year, about it.

Life took over, couldnt really be arsed with the car for a long time etc..

[Tufty]

should still be there, will have a nose.

Engine turned over on the pred last year, about it.

Life took over, couldnt really be arsed with the car for a long time etc..

Fair enough Ryan, you got a really nice motor! Be nice to see it around track this summer, be nice to see it in person aswell.
I want to see what 200hp in an N/A is like! :hug:

[AdamH]

a reply from atpower.


Thanks for the email. We have no plans to make a specific airbox to use in the Saxo/106 engine bay. It should be possible to use the pipercross px airbox, or the reverie zolder 65mm in carbon fibre. Both of these will be fairly tight around the brake master cylinder area. I have a customer in France who will be trying one of the reverie airboxes out soon, and I will try to get images/feedback of it if I can. The main issue with airboxes is the price, so as it stands we have no interest at the moment.

Also in regards to the angle we currently have no plans to adjust the it, but the next time we make some, we may go ahead and alter it. We have tried new manufacturing techniques on other throttle sets over the last year which would allow us to do that. However, we have no current plans to make more at the moment.


Hmm

[Tufty]

coming back to this, booked a track day at brands hatch in april, DB limit is 105 static test. You reckon i will pass that? straight through super supersprint and then my engine spec

[Olly]

Should be fine tufty.

[Tufty]

Should be fine tufty.

Thanks mate :)

[Olly]

Mine was around the 90's exhaust with the btb

Around the front was borderline 105 with revs, but my setup is very open.

[Tufty]

Mine was around the 90's exhaust with the btb

Around the front was borderline 105 with revs, but my setup is very open.

they do one for the front of the car aswell? I think i should be okay.

You done brands before?

[sexy_gt]

i had 97 static at 4,500 today, 708, at with filter, saxsport and milltek manifold.

[Ryan]

mine passed the static at brands twice that was with pugsport manifold and 2.5inch system with 1 single silencer.

If you are worried just dont rev it to hard/high they often dont check the rpms ;)

Only thing louder than me that day apparently was a GT3 Cup car according to some spectators lol. They didnt test the front of the car just the back. I didnt make it obvious I was running open bodies when going up to be tested mind.

[sexy_gt]

hello lads,

i drove bedford GT last monday 28th. passed static at 97db. limit was 101.

drive by is set at 87.5 30ft drive by. on my 1st lap in the morning taking it steady and warming things up i was shown the "NOISE" board immediatley. i drove a few more laps gently and was not shown this again.

i decided i should pit in and have a chat with the marshalls....

theres 4 noise mic's at bedford. it was one in particular exit of hairpin i was 1db from being sent home ON MY FIRST LAP! no excuses at all they just kick you out :(

i was asked to lift on 4 of these points and asked to take care, light throttle and short shift from this one hairpin.

i managed the whole morning till i crashed (yes twice in a month lol) and the rest of the afternoon once fixed. i will go back. i dont mind lifting off slightly in places as its such a good track.

so if you have throttle bodies or are thinking of them bare this in mind :)

[AndySAXO]

Do you run a middle box in the exhaust system?

[sexy_gt]

its a saxsport, dummy cat. its hollow. its not the exhaust its the induction.

YouTube - PLANET SAXX 25/03/11 saxo vts cadwell park

[AndySAXO]

With a middle box that bring the drive by noise down, it brought mine down alot, I would look at getting a baffled middle box to help that level.

The bodies will be loud but on a drive by it take the whole noise, when I had a straight though, it was extremely loud, but with a middle box brought the drive by noise down.

[AndySAXO]

As your static test is loud and that taking from behind, my static test with bodies and kam racing system with middle box is 83 dB

On a drive by it take it all into account, so get the exhaust noise down will help you abit

[sexy_gt]

maybe an idea but my static has only risen 1db since fitting cams and bodies. ive driven bedford 3x before and never had an issue till now.

[Ryan]

bedford is an arse, im not even going to bother going there for this reason as stated previously on the forums.

They are linked to the council so there is the 1 strike and you are gone rule. Not cool/worth the risk.

[KamRacing]

I dont totally understand why you wont change your exhaust system. Seems to work for others and will be better for power than a badly designed enclosed airbox.

[sexy_gt]

I dont totally understand why you wont change your exhaust system. Seems to work for others and will be better for power than a badly designed enclosed airbox.



I like my exhaust. I only have problem at one track. I can live with that. :)