Morning guys and gals :-)

Looking at some xfire pics I see some people have 2 metal pipes in the engine bay either side of the cover yet mine are plastic?

I am not mechanically minded so wanted help on knowing what these are called and where could I potentially buy them? Could I fit them myself or leave it to professionals?

Also is it worth chipping my xfire? Any experiences people want to share?

Taa in advance!

 

Not sure, but you may be looking at the SRT engine. Go for a new exhaust system. Looks good and sounds great. Had one fitted last week.

Jon

 

What you may be seeing is a dual CAI ( Cold Air Induction ), but then you would probably not be seeing any engine cover.
Check maxcichon for any post and look at his sig : that is his home-made dual CAI.

Check my gallery, that is a single CAI with a C320 engine cover.


I have NO clue what 'chipping' means.

 

Aaaah! So looks like 2 x CAI pipes is what I need?

Chipping as in remapping the ECU... Apparently it improves power AND fuel economy?! Am I being a proper newbie and getting too excited over some real BS?

 

You dont need 2 CAI's, If you do it yourself then you need 2 pipes to run to a Y pipe going into the throttle body, which is the stock setup. Needswings has a Dual and a Single you can buy.

The chips I have seen are BS. The $60 and $40 ones you see that are universal dont do anything at all according to reviews I have read in the past. Get a tune, that is how the ECU can be remapped. There is a sale still I believe for $300. Thats what you want not a homemade money scheme.

 

My SRT6 is chipped and de-restricted, done by the dealer who first had it, apparently the best results you can get is 30+ bhp. I have heard that only 10/15 bhp can be made from the standard car so not really worth the cost.

Like The Bodyman I have put Magnaflow catback exhausts on both my cars, could give 5/8 bhp.

CAI is my next toy for the SRT6 if possible, then its off to the dyno to be set up. I am hoping to be somewhere near the 400 bhp mark

 

Can I ask abit of a technical question?.....
I'm a process Engineer - pipes/pumps/ducts/etc....what sort of max flow rate are you taking in through the intakes and hence we can do some calcs?
I think it's usually measured in grams per sec g/sec.
cfm is another - but is changed with pressure - ie: is 5% lower at the front intake than at the throttle
body - whereas g/sec is constant.
I guess for the purpose of an intake calc - we can neglect the 5%

say 500cfm*= 14.1m3/min = 16,920 g/min = 4.7g/sec

Whatever it is, you can then calulate the pressure loss through the system. Pressure loss there is lost suck = lost performance - that determines if you need 1x 50mm or 75mm or 2 x 75mm intakes and determines the cross sectional area of your filter as well. I'm guessing if you can keep that loss to <5kPa - you're on the money.

choose your poison

* at "normal" temp (0degC) and pressure (101.3kPa) air weighs about 1.2kg/m3

 

Not to overwhelm the lesson - but if you put it into the context of boost....15psig boost is 105kPag, if you are loosing 10kPa through your intake manifold - that's a 9% power loss.

Of course - I know processes - but I dont know cars so well - so I happy to be corrected.

 

Rob @ Needswings builds the CAI, both single and dual. He did do all the CFM calcs and testing before distribution... I don't remember them now. It was originally thought a dual was overkill until it was tested, and it does make a difference....

 

ECU tuned and limiter changed for us over on this side of the pond. There is no "chip" only a retuning of the ecu...in which case you can change all the parameters... You can certainly get to 400hp at the crank.... with all the right mods...

 

yes - most things have been done before and NW woudl have certainly done all this stuff...amongst others.

I'm just looking for a peak cfm to get my calcs/curiosity started.

b22b