Hi all,

i just have my header and exhaust custom-made by local shop. but after done, some 'ssssss' noise coming out when reving and it's noticable in the car. the guy said it's from the flexible joint and normal for cooper S. he did check the header to make sure no gas leaking.

is it normal, guys?

also im thinking to upgrade my pulley to 15% or 17%. is it needed to upgrade the radiator and intercooler as well? for intercooler, any room to install it in the front near bumper?


thanks


so far, i upgraded header, exhaust, wheel, KW coilover, upgrading brake pad and hose soon (feredo 2500 and goodbridge).

 

No, no and no.

 

??

 

There isn't enough room in the bumper to have a FMIC. The radiator is there anyway... You'd have to do some serious surgery to do it in the first place, and I have no idea how you would do that. I don't have a pulley or an upgraded IC- so can't really help you there.... There are LOADS of threads on pulleys, so just search around and you'll come up with something.

 

Guys, give a little insight to your posts. Just saying no isn't going to help him!

1. I honestly have no idea. I would say it's not normal for a stock header, but as long as the header/exhaust isn't leaking I see no serious problems...maybe someone else will shim in.

2. If you change the pulley, a new radiator or intercooler is NOT required. You can mount a FMIC on the MINI, but it requires major surgery and the transfer/removal of certain parts. Do a search on here for the thread, I know Tuls has done it.

Keep in mind that if you go above a 16% pulley, you will need a new (shorter) belt.

-Cody

 

I'm sorry . Should have explained more. There is no hissing type noise that should be comming from the exh, unless the shop designed it that way? Don't know about a header, as I run the stock one. I have an aftermarket exh. system, made by Alta, has no hissing noise. Now if you have an CAI, then you might get a hiss type noise, but you did not say you have a CAI. About the IC, I have a 16% pulley and still run the stock IC. You can get a DFIC thru many vendors that gives 100-200% more IC cooling capabilities. M7 and Alta are a couple that sell them. You can check the "lower your IAT's" thread, this is all about IC's and stuff. Hope this helps .

 

I guess I stand corrected, but for all intents and purposes it is a serious undertaking to have an FMIC on a MINI. Not something that is common or easy by any means.

 

Here is the thread:

https://www.northamericanmotoring.co...highlight=fmic

-Cody

 

WoW . Never saw that thread, that is awesome!!! but can't be cheap .

 

Thanks for that thread Polizei. That's some sweet stuff!

 

Yea, it's all custom, even the size and piping of the IC.....so it's definitely not for the faint hearted, or for the modder on a budget!!!

It looks cool as hell though...I think MINI's should have come that way.

-Cody

 

+1

 

well...my header and exhaust are designed by a local shop. when they installed the first header, the noise is obvious. they claim it's from the flexible joint. they replace the joint with a better one (japanese). the noise is a lot smaller but still noticable. im very new to modification. so wondering if this is just normal sound from the pine. maybe greater air outflow leads to the noise?

also the pulley, i was told that if just 15%, no need to upgrade IC or radiator. but i like to upgrade the IC anyway to increase the power. how much extra power from the 15% pulley and IC?

thanks to all the comments anyway. good to share

 

I highly recommend the 15% pulley. I haven't heard of anyone upgrading their radiator unless they plan to do a full track setup; if anything, you can purchase an aftermarket oil cooler that is placed in-front of the radiator, but IMO that is just a waste of $$$ for most people.

There are also several threads on the effectiveness of larger aftermarket intercoolers. Keep in mind, intercoolers don't add horsepower; a better way to describe it would be that they prevent you from losing horsepower due to excessive heat. Of course a larger intercooler has more cooling capacity, but also a larger pressure drop. I believe the thicker cores actually block some of the airflow from the scoop and cooling is actually less. If I lived in an area that has high temperatures year round, I would probably invest in the M7 DFIC, otherwise I would spend my money elsewhere.

My interpretation of everyone's mixed opinions and data on intercoolers is that there are only marginal gains to be felt with aftermarket intercoolers; I still haven't purchased one yet because I feel they offer no significant power gains, just bling bling. The stock intercooler is actually pretty darn good. I spent $150 on the Alta I/C air diverter with water/alcohol sprayer and am extremely satisfied.

 

you are asking a very debatable question here. Technically a IC cannot make HP, it will only allow you to use more of the HP that is already there. You should go into the "Generation 1" threads, then go into the "drivetrane" thread. Then you will find a thread called " 231 whp...." This goes into all of this.

 

BTW, if you are looking for probably the best power upgrade besides the 15% pulley, SpiderX and MSFITOY each have a Webb Motorsports cylinder head for sale for $750; they haven't been used much and cost $1850 new. I believe they add about 19 whp. Depending on how serious you are, I would definitely look into that.