Air Intake
Mod | Benefit | Drawback | Is it a problem? | Notes |
Replacement performance panel air filter e.g. K & N |
|
|
No |
Don't get a foam filter as these are generally poor at filtration and if they disintegrate it'll disappear into your turbo and engine |
Remove intake resonator Picture |
|
|
No |
May provide enough space for:
|
Straight air intake and large cone filter Picture |
|
|
ish - takes time/effort |
Several companies manufacture cone air filters. A K&N is fitted at the moment but another alternative is the A'pexi filter which has proven to filter and flow wellBlitz make a shiny stainless steel mesh filter - you can see through the filter, so it doesn't filter very well! |
Cold air box Picture |
|
|
ish - takes time/effort |
|
Gas flow AFM Stock AFM Pictures |
|
|
ish - takes time and effort |
I "think" that made a small difference... |
PCV catch can Article |
|
|
ish if fabricating, No if buying! |
The GReddy catch can seems to be a good unit. The Mocal one is rubbish as this is not internally baffled. The Halfords can is better than nothing but not brilliant...(it's cheap!) |
Port intake manifold |
|
|
Yes, very awkward |
Awkward to remove the manifold Need a Dremel or something similar to do the porting. You can pick something similar up for <£20 Sanding drums are available and shift aluminium in no time |
Remove & port
TVIS
Article |
|
|
Yes - access very awkward |
Low idle speed produces a low oil pressure which is bad. Mr bearing is not protected as well from damage by Mr crank...When the car is hot in summer and stuck in traffic it very occasionally stalls due to the low port velocity |
Bored out and gas flowed Throttle Body Article |
|
|
No |
Difficult to ascertain it's benefits as this was fitted with a few other mods at the same time. The 205 came with a larger throttle body 60mm vs 55mm for 165 and 185 |
Tighten AFM spring |
|
|
ish. Make sure the car is not running lean |
Try a 1 or 2 notch increase in spring tension I have seen an increase of ~20bhp on running a 44mm trim turbo just by altering the AFR to closer to 12.5:1 |
Front grille Article |
|
|
No |
Drilling holes in the grille below the lhs headlight will allow more cooler air to enter into the air filter area |
Cold Air Intake |
|
|
No |
Try running a length of hose front the front bumper back and up where the intake resonator used to be and out just by the air filter. Note this is the stock air intake path... |