[alan_m]

Guys 'n Gals,

Having looked at some previous posts, people have said that they have often noticed a loss of power lower down the rev range when fitting a full induction kit. Has anyone just fitted a replacement panel from say K&N??? If so, does it make a difference???

Thanks in advance!!!! :roll:

[BOK]

Guys 'n Gals,

Having looked at some previous posts, people have said that they have often noticed a loss of power lower down the rev range when fitting a full induction kit.  Has anyone just fitted a replacement panel from say K&N???  If so, does it make a difference???

Thanks in advance!!!!  :roll:

I've had a K&N panel in my previous 1.7 and in the FRP- no noticeable loss of torque but then again not any noticeable gain...no one mod like an air filter is going to set the tyres on fire but perhaps it is helping breathing as a part of the overall tuning package (exhaust, filter, tunable chip).

One advantage is the extended service life- don't forget to tell Ford service though or else it may get chucked to be replaced by a paper filter.

[Black_Kat]

Having looked at some previous posts, people have said that they have often noticed a loss of power lower down the rev range when fitting a full induction kit.  Has anyone just fitted a replacement panel from say K&N???  If so, does it make a difference???

I wouldn't say my K&N 57i induction kit has lowered performance. It seems to pull a little more mid-range (just right for over-taking), I like it; it is so easy to fit too. Could be a good modification for our new girl racer's to start on their Puma.

Doubt you get the roar with a filter panel whicht is part of the fun with an induction kit. :wink:

Kevin.
T5 KRH

[seang]

I did have a green induction kit fitted, I was impressed with the induction noise but not with the performance. The puma seemed to be a little life-less within the midrange. I then fitted a cool air feed from the bottom grill to the cone filter but made no difference .

I have now put the original air box with a K&N panel filter back on the puma and redirected the air feed pipe from the inner wing (which points towards the dashboard) to point towards the lower front grill. The midrange performance returned (though no noticeable power difference) and feels stronger during hard acceleration .

[lisafrp]

Doubt you get the roar with a filter panel whicht is part of the fun with an induction kit. :wink:  

Kevin.
T5 KRH

As mentioned before you should drill some large holes in the bottom of the airbox under the filter for a great induction noise, and its free to do.

[Turby]

Zetec engines get confused with induction kits, because the air is coming in too cold.  They run on what is effectively a choke mode all the time, so eat more petrol.  Don't think you get any real power gain - maybe 5 bhp.  Remember, it is bhp that sells cars, but torque that wins races.  moving the torque up the revs means a loss in performance.

Cold Air:
Not strictly true as any decent ECU measures ambient air temperature and usually inlet air temperature as part of its normal operation cycle.

The MAF sensor basically detects how much voltage is required to heat a fine wire to a given temperature, the more the air flow the greater the current needed. As you say the colder the charge air coming in the more voltage required but this is "simply" offset by the rerading from the ambient air temp. At the end of the day the incoming air charge can't be any colder than the ambient air - unless other cooling methods are employed which would confuse the ECU.

The inlet air temp sensor (amongst others) is used by the ECU to help fuel enrichment.

Cold air is more dense than warm air on a volume for volume basis - energy is provided by mixing fuel and air... more air allows the engine to use more fuel

Power vs Torque:

Close... but not quite right... torque is the actual unit of measurement of an engines output and BHP is simple a function of torque.

BHP = (RPM * torque) / 5250

Torque = (BHP * 5250) / RPM

Therefore a F1 engine which produces 750 BHP at 18500 RPM produces 212 ft/lbs of torque... i.e. which is less than a lot of turbo diesels!

When tuning an NA (Naturally Aspriarted) engine, power is released by moving the power band further up the RPM range - on a race track this is not a problem as the driver can choose to stay "in the power band". As you stated on a road car torque is more important because the driver (unless they are being stupid) cannot choose to stay in the power band for a large percentage of the total during period. This can be monitored by recording throttle position.

HTH Turby

[Deano]

I have now put the original air box with a K&N panel filter back on the puma and redirected the air feed pipe from the inner wing (which points towards the dashboard) to point towards the lower front grill.


!!!! Be VERY careful, the air feed points backwards for a reason, being low to the road you are much more likely to suck up flood / rain water if you turn it to point forward.

I have seen it done and it is very expensive.

[Mug]

I've a BMC panel air filter... obviously it can't be miraculous, but it makes revs increase a bit faster, above all at low rpm...

[Borges]

And what about a BMC CDA admission ?
Its a dynamic admission and i think that is one of the best solutions around, here in portugal people uses them allot, btw they are expensive (around 300€).
Anyone has one of this ?

[SteveTDCi]

BMC Coolflow kits work well and are available from Edge MotorSport. Very similar in principle to the Pipercross Vector.

Steve

[Navin]

Guys 'n Gals,

Having looked at some previous posts, people have said that they have often noticed a loss of power lower down the rev range when fitting a full induction kit.  Has anyone just fitted a replacement panel from say K&N???  If so, does it make a difference???

Thanks in advance!!!!  :roll:

Hi there, I'm pretty new to this site, but I have a 99 1.7 Cat with a Pipercross Induction Kit. It creates a hell of a noise, some increse in midrange performance, but the biggest noticable change is in the fuel economy. It really drinks the stuff. However it makes the small Cat sound like a wild beast.

[johnak]

Hello,

I tried K&N 57i for about two weeks.

My Kat lost it's rasp; and became a grawling beast. Not sure if that's good or bad.

These kits seem to work better on turbo-ed cars; as more cold air = more poke.

took if off because I could not tell if it improved anything. I've still got the kit and maybe I'll put it back if persuaded. Or if my Kat looses power over time _ I'm on 52,500 miles! T-'99.

Also, My girlfriend said she could her me for miles when I dropped her off at the train station...@ 7:30 am. :twisted:

JK