Anyone elses 182 feel slower after custom back boxes?

[Dan Page]

My car is sooo m,uch slower with custom back boxes
I'm booked in at prospeed to go and have them taken off and one of theres fitted and this should cure it (or so i hope).

I thought it was because the ones i have just had fitted at mij were too small but it has been back today and had bigger boxes on and feels even slower! 2.5" bore now instead of the first ones which were 2".

 

[Dan Page]

and it sounds stupidly loud with 2.5"

am in two minds whether to settle for the "pea shooters" and go back to standard.

 

[ben_p]

who fitted the first one?

 

[len_beach]

Mine feels loads slower with custom, especially now it has fallen off. LOL

 

[Dan Page]

MIJ in Walsall fitted the first ones 2" bore. After two days of driving and me moaning ast them saying its slower they agreed to replace the boxes for 2.5" but now its even slower! I hope this 480 notes with prospeed sorts it

 

[Joe@ShedMotorsport]

When will people realise that custom exhausts are crap for performance gains, its pot luck whether you will see an increase or not.

 

[rory182]

its not pot luck if you goto somebody who understands the science of gas flow...

Hayward and Scott and Prospeed have great results.

 

[Justin182]

What about Janspeed?

I'm sure mine feels a little pokier.

 

[Dubai182]

Janspeed isn't custom Justin....come on keep up,lol.
I think you should always stick with companies that have experience of 182 exhausts if your going down the custom route...i.e Prospeed and H&S.

 

[thedoc]

Re-mapping the ecu may help with the power..

 

[Ali]

But you should never lose power with a full custom exhaust system...You may not Gain, but you'll never lose.

IK's are a different kettle of babies all together.

 

[Joe@ShedMotorsport]

I have to disagree. Exhausts are much the same as IK's, the lengths and diameters need to be tuned in much the same way to utilise pulse tuning effects, as crap as people think std airboxes and exhausts are, a lot of engineering knowhow has gone into their design

 

[MarkM]

I have to disagree. Exhausts are much the same as IK's, the lengths and diameters need to be tuned in much the same way to utilise pulse tuning effects, as crap as people think std airboxes and exhausts are, a lot of engineering knowhow has gone into their design

i agree but standard items have to be designed with factors such as cost, noise, ease of manufacture etc.

I have had two customs from MIJ the first one was loud with a thin bore 2" and twin back boxes. Very boomy and annoying at certain rpm and a bit strangled in the mid range. I dont know if it lost power because it is hard to compare when it made so much more noise.

The second exhaust with a bigger bore and single back box was noticeably better especially mid range, it felt smoother.

I know everyone holds prospeed and H&S in high regard and I am sure they make nice exhausts. BUT they build to fit simple as that, there is no thought on design in terms of size and position of the silencers for peak torque and power or computer modelling of the exhaust pulses, use of chambered silencers etc.

AWT, Orbisoud and BTB are the companys who will develop exhausts with performance in mind and develop rather then just build to fit. Unfortuneately they are expensive.

 

[Dubai182]

Pay your money take your choice.

Bottom line is money talks,but there are good deals,for example off the shelf blueflame. When back in the UK gonna have a look at the all the above mentioned..hopefully Ben will have got it released by then.

 

[MarkM]

Dan have you got a cat back system?

What are prospeed going to do that will be any different?
Are you getting the single back box with twin exit like GDIs?

I think from what you are saying you are confused by silencer bore and pipe bore. Look at the pipe from the cat to the silencers this is what will cause the problem if its to thin. Apologies if I am misinterpreting what you are saying.

Did they just replace the silencers when you went back or the whole system. Bigger silencers = quieter but bigger bore pipe will be louder.

 

[Ali]

I have to disagree. Exhausts are much the same as IK's, the lengths and diameters need to be tuned in much the same way to utilise pulse tuning effects, as crap as people think std airboxes and exhausts are, a lot of engineering knowhow has gone into their design

Nah, a decent off the shelf Exhaust will not lose you power. Janspeed, k-tec, Prospeed(Althoguht there kinda custon)

IK's on the other hand will. Esp open filters and Vipers....Been proven mate

In an ideal world joe, we'd all have supersprints or obisouds or BRB's

But at that sort of money i'd rather sell up and buy Jap.

 

[Joe@ShedMotorsport]

Nah, a decent off the shelf Exhaust will not lose you power. Janspeed, k-tec, Prospeed(Althoguht there kinda custon)

IK's on the other hand will. Esp open filters and Vipers....Been proven mate

In an ideal world joe, we'd all have supersprints or obisouds or BRB's

But at that sort of money i'd rather sell up and buy Jap.

You never said off the shelf, you said custom, hence my response. Internet wire crossing!

 

[nelson182]

As long as my H&S hasn't lost me power im happy. Noise and looks keep a smile on my face

 

[Ali]

You never said off the shelf, you said custom, hence my response. Internet wire crossing!

as so....My bad. apologies.

 

[Englebert]

I know everyone holds prospeed and H&S in high regard and I am sure they make nice exhausts. BUT they build to fit simple as that, there is no thought on design in terms of size and position of the silencers for peak torque and power or computer modelling of the exhaust pulses, use of chambered silencers etc.

I'm glad you said that because it was what i was thinking! I'm sure Prospeed have a good reputation for fitting and building good exhausts but ultimately there is no reason to say they are any better than a Poweflow dealer or such like...

Unfortunately if you want a truly decent exhaust you have to pay accordingly.

 

[Lagerlout]

Agreed. The exhausts that are designed for the car will always be better. Custom places build one to fit and make it look nice. Horses for courses.

But if you think I'm paying circa £1000 for an exhaust on a 7k Clio, you've got another thing coming!!

 

[M.C..]

MIJ in Walsall fitted the first ones 2" bore. After two days of driving and me moaning ast them saying its slower they agreed to replace the boxes for 2.5" but now its even slower! I hope this 480 notes with prospeed sorts it

thats a lot of money for a CAT back you could get a blueflame for about half that price and you can't see the back box's on the blueflame

 

[Dan Page]

MIJ just "cut off" the original two back boxes at pretty much the joint where they are joined to the bore and replaced from there, they welded a new short piece of pipe to each and then welded their boxes onto there.

The exhaust prospeed are building me is going to be a single box like the GDI car.

Im having second thought though, I may go back to standard or an "off the shelf" one because surely they are developed for power and looks and not just to fit and look pretty. Magnex, blueflame which one is best? Please ppl reply and help as im now having major doubts about an aftermarket exhaust.

 

[makavelli]

dan ive got the older prospeed with the two backboxes

first of all its pretty noisy lol but i dont mind that too much, it just drowns out the viper lol

in terms of power, i dont feel ive lost any power but i dont think there is much of a gain either.

the engine just seems more free on accelerating although the 5k kick has gone now, its more of a gradual build up from lower down in the revs

andy

 

[Dan Page]

i cant be arsed any more, i am going to go back to standard. I will still go down to prospeed and get him to put the original one back on as I have said I was so he dont loose out on any business

 

[Paul J]

Nah, a decent off the shelf Exhaust will not lose you power. Janspeed, k-tec, Prospeed(Althoguht there kinda custon)

Why do you say that, have you had them tested?

If not its perfectly feasible that a loss occurs from fitting a different exhaust :S

Infact if the design differs its almost certain that power band will alter and losses and gains may be seen.

 

[Gaz_]

my prospeed is spot on, deffo not lost anything imo, feels the same as when i had the magnex

 

[Joe@ShedMotorsport]

Would you be able to feel 5bhp though? I know i couldn't

 

[Gaz_]

.....so how much do yours gain?!,
i doubt very much it'll be anymore tthan 5bhp, if your lucky?

i'm open minded, so i'd like to see some proof of how good this 182 sysem really is

 

[Joe@ShedMotorsport]

I'm not saying ours is more or less than 5bhp, i'm just saying that it is an amount that is very hard to "feel", a lot of the time it can just be placebo. We're not publishing anything until we have prices sorted etc.....

 

[Gaz_]

agree totally, but i'd be very suprised if a quailty exhauxst system made anymore than around 5 hp on a N/A engine, and when some of these systems nearly come in at 1k, thats alot of $$ for not much gain

 

[Joe@ShedMotorsport]

I agree also, gains are very hard to get on an NA engine unless the std system is shite which the 182 is not and my 205 is the same. Where the "premium" exhaust systems come into there own is when the engine has had work done such as cams or TB's. Thats what our experience with the likes of btb has shown in the past. They don't always produce big gains on a std engine but that all changes when fitted to a modified engine in comparison to, for arguments sake a magnex.

 

[Ali]

Why do you say that, have you had them tested?

If not its perfectly feasible that a loss occurs from fitting a different exhaust :S

Infact if the design differs its almost certain that power band will alter and losses and gains may be seen.

Yep, with RR facilities on site up here, before each Mod, whether it be Zorst, Maxogen, Inlets, remap, Head or cams.

It's RR before and after. I gained 1.2bhp with zorst...f**k all basically and lost 3.8 with a Ram Air IK. (And i could feel the loss myself) before it was put on the rollers.

Regardless of the differnce in ambient temp and Air pressure between days.

 

[mijperformance]

Hi everyone,

You all know that you can still pump more power out of your engine with stock internals with just a few minor tweaks and the right setup then why didn't the manufacturers think of that? They make a system which will last a certain period of time and with restrictions to prolong engine life. They have regulations to comply with.

Once you buy an off the shelf replacement in MILD STEEL it never lasts as long as the original OEM system. This is firstly due to the quality of the system and also dependant on the section that is being replaced; clamps are used which allows chances of leaks and easy rot.

AFTERMARKET SYSTEMS THE BASICS
Increasing the bore size will:
Increase sound and BHP but if you increase it too much it will just be noisy and loss of power.

Reducing the bore size will:
Acceptable sound level (will increase as all our system are free-flow non restrictive), possible BHP gain but definately TORQUE. Again if you reduce too much then no good.

There's a never ending road when it comes to tuning car's, exhausts are simple performance enhancements which DO increase power & driveability.

Only FACT is the SETUP has to be right!

Working from a budget doesnt help and also when it is custom you choose your requirements. We meet them and in this case (Dan Page) it was looks and sound, as far as performance is concerned you can't expect much from just backboxes. It wouldn't be down in power for sure. As requested we had changed the bore size from 2" to 2.5", specifically stating that it will actually increase sound and less torque and it's not what you want.

Going from your requirements we do our best to achieving a pleasantly looking, sound a performing system.

We have had issues like this where customer's ask for a requirement and then change their mind for some apparent reason at a later date, we then change the system to their new requirements. Stating that its not what they want and then.... THIS HAPPENS!

UPSET & TOO EMBARRASSED TO COME BACK... DON'T BE!!


Come in to see us Dan or PM me.

Sorry if anybody is offended by this post.

Maz. <mijperformance.com>

 

[Dubai182]

Correct me if i'm wrong but he said he noticed the lack of power even with the 2" bore on which was first fitted?

 

[mijperformance]

Correct me if i'm wrong but he said he noticed the lack of power even with the 2" bore on which was first fitted?

I am not argueing any loss of power, the power gain/loss against the RPM Curve has changed. Like mentioned before how much are you to gain from just backboxes?

We are re-locating in a few weeks to our purpose built premises and soon we will have a rolling road, we will be doing before and after plots to prove.

Maz.

 

[Ali]

There's something Very wrong if you can noticble feel a loss of power with just back boxes.

 

[Dubai182]

Thats what i was thinking and questioning the comment,surely he shouldn't have any loss of power with just backboxes?

 

[Boz]

I am 100% satisfied with my Blueflame. 2.5" bore - best size for 182, no centre box, sensible silences which are out of sight. I recon power is similar to standard and mid range torque feels better. 5K kick is still nicely in place. All this for £250 and it wont tick,rattle and rust like the standard renault system which is very cheaply put together.

 

[182 Spiced]

Blue flame - Now I've heard a lot about this, but where can I buy it from? And for £250

All I want is a nice purring noise from my exhaust, nothing else. No power gain or of course loss. Surely there must be an exhaust which the majority would agree with...

I have a budget of £650ish including fitting... The more I read, the more confused I get, or is it the fact that I haven't got a grand to spend on some top notch stuff (which most ppl seem to recommend) and only enough ££ for either a lucky buy or a potential headache.