Another job for tidying up some bits and pieces, noticed that the ICV pipe had split off the main inlet pipe, presumably letting the engine fill with unfiltered air

Don't know how long it was like this so I set about replacing and upgrading. Saw someone's thread on here with a 90degree elbow fitted instead and, while it might not make much difference to the car, it looks shiny

When i took the old pipework off I noticed another eric, whoever fitted the K&N before me didn't use the right coupler and the hose clamp had fallen off, so the filter wasn't even attached to the pipe

Must have been like that for a while by the looks of it, given the fact the car RR'd at 175bhp and 143lbft i'd expect at least one of the figures to be up slightly now, not least a better torque curve. That combined with last month's full service and engine flush means she's purring smoothly now and seems to "bark" more than it did.

I also saved expense (not that it's expensive anyway) by using the old breather pipe, the dog leg shape meant the breather sat quite nicely out of the way

Ingredients:

90 degree alloy pipe, 76mm OD, 150mm x 150mm
Two 4 ply silicone joiners, 76mm ID, 76mm long
Mini breather filter
4 70-90mm hose clamps
2 small hose clamps
Coupler for the breather

Before:



After



I'm not going to write any fitting instructions, it's pretty self explanatory.

Haven't taken if for a drive yet, left the battery unhooked tonight ready for an ECU reset tomorrow, football called me in the house before I had chance. Better sound from the engine now and better throttle response, no idea if that would be noticeable over a well fitted filter though

________________________________________

Bye bye Sundance Kid

The engine was pretty standard, just an ill fitting K&N and a decat, and what looked to be 3 year old spark plugs and filters. Book figure was 167bhp iirc, taking into account discrepencies with RR's it's a pretty healthy engine on the whole.

Now it's got advanced inlet cam timing, PTFE inlet gasket, custom inlet tract, new filters and plugs too.

Filter straight on the throttle body will reduce peak torque and power due to shortened inlet tract and heatsoak from the engine.

________________________________________

Bye bye Sundance Kid

Chris you can get another 8/9% more torque out of that engine if you look into advancing the cams next time its on the rollers

________________________________________

Nothing to see here

Be really weary of puddles with that set up. The car that I broke 2 years ago had a knackard engine because it sucked up water. It had the filter in the same place as that.

________________________________________

Ex SC-6

Now in a Megane R26

That is the standard setup minus the box which is tehre to stop shit sticking to the filter= peroformance downgrade. The area of teh standard filter is already massively oversized fort eh power requirements of the engine so no power gain will be had. Even a good rolling road the accuracy will be =/- 7% anyway. original power is claimed to be 123KW- in bhp that would be 165bhp. I think they make about 160bhp when new. add miels average good one puts out 155bhp- performance measured backs this up.

Looks like you have done some top work on your car though- will be agood buy for someone.

Partly true, but the inlet piping was designed as a compromise, both flattening out in sections like under the top coolant hose and a concertina'd section to allow for engine movement. The engine is now Group N mounted and, considering the throttle body is 74mm internal diameter or there or there abouts, the new piping shows no restriction to air flow at all. Also the standard feed passes over the top of the radiator adding to the heatsoak. Where it is now it has a nice supply of cold air straight through the front grille.

The idea was to create a much smoother inlet tract than the standard airbox, theoretically improving torque spread if not peak.



Again, we all know of discrepencies on Rolling Roads. However when at the Ecosse Rolling Road last october on 135k miles it made 174.5bhp at 6610rpm. Out of all the normally aspirated GTi6's it came out as the second most powerful, most others coming in at around 160-165bhp, and one dog at 145bhp or so. Even if the rollers were over-reading, or underreading for that matter, it would affect all the results for all the cars. Same day, same atmospheric conditions, same roller calibration. At the very least it's a healthy engine.

Bear in mind those figres came with an induction kit that obviously never fitted the pipe properly, an idle control feed that had split and nearly fallen off, and from the state of the oil and plugs woud appear the car hadn't been serviced in a long time.

Personally i don't think i'm being optimistic when I expect to see an improvement.

Oh and Adam, the timing was only advanced a couple of months ago. The figures were pre-advance

________________________________________

Bye bye Sundance Kid

Not had a look internally but the last owner had it for 6 years and no mention of changing anything, was completely standard apart from a blowing custom exhaust of unknown origin and the K&N fail.

**edit

Must just be one of those "weekday" engines

________________________________________

Bye bye Sundance Kid

Any pics of this custom exhaust? Maybe that is giving the power?

If a standard engine is setup right with a standard exhaust and induction then it can make those figures. Mine was always 156lbft with power readings between 172 and 179 on different rolling roads. It was standard at that point apart from the cam timing. Knowing the many issues with rolling roads however I was happy that it was a good curve set and always seemed quicker than other similar cars.

Better get mine on the rollers soon and see what the cam timing does on the V6. I know another 20lbft and 10BHp can be found if its setup right.

________________________________________

Nothing to see here

Look in the FAQ section Dan

________________________________________

Nothing to see here

+1

The induction kit sits about 12" off the ground and is in front of the wheels so no splashback, people must just be daft to drive through puddles slowly with an open filter

________________________________________

Bye bye Sundance Kid

Aye cheers mate, that's the thread I used for reference. Good thing with using an induction kit is I could sit it where I wanted it

________________________________________

Bye bye Sundance Kid