12 replies to this topic

[gurkatank]

Was thinking about fittin 57i kit to my 98 mpi but done bit of reading and k and n elements with filter housing mods seem to be better. I understand this involves drilling certain areas and removing a piece of plastic? Can anyone offer bit more precise instructions?

[Sprocket]

Is there enough room to drill holes in the standard SPi/ MPi airbox without bypassing the filter?

I cant comment as the first thing I did was to bin the standard airbox.

Up to a point the standard airbox with a K&N elememnt is good enough, but if you have around a stage three tune engine then its no good and you need to fit the induction kit

[gurkatank]

Yeah i think there's just enough room for a few holes in the rover airbox.

You think just put an induction kit on and keep original airbox and filter as spare for long journeys then?

Cars a 98 mpi-standard engine apart from RC40

[Dev]

To be fair the best thing is to Bin the standard filter box and put EITHER the KN57i or the pipercross equvilant on.

if you insist on modifying the filter box you need to file down the ridges on the inside of the arm style ram pipe and drill holes in the front of the box.

Being honest with you this is a bodge and in the long run you'll be better off buying the correct induction kit.

HTH

[Nu2mini]

Has anyone got any data to show the benefit of doing this on a standard car. I have a 93 SPI and was considering the Piper cross kit. What benefits am I likely to see. Car already has LCB manifold and modified exhaust as I was told you see more for your money starting on exhast side compared to inlet side.

[Dev]

thats not strictly true as the exhaust only removes the waste product from the engine ie the fumes.
Starting with the pre engine side ie air filter, injector etc then head and onwards in to the block is the way to find the best value bang for your buck IMO

[miniwats]

On my mpi, I modified the airbox (link below) and installed a k&N element. Also I removed the L-shaped restictor on the throttle body and it made a huge difference on how the car drove. There is also a lot more low more low down torque and the engine is much more responsive. This only cost 30 pounds and is well worth doing.

try this link
http://www.cloud-nin...tech_airbox.htm

[Dev]

Well the removal of the L plate is a good idea, but i really cant see the benifits of those air box mods tobe honest.

[Sprocket]

http://www.cloud-nin...tech_airbox.htm

I honestly dont think any of that is going to make one blind bit of difference compared to a standard air box set up. LOL modifying the bolts and the posts is a waste of time, it certainly wont unrestrict the flow into the engine.

why not fit the K&N element in the standard box and see how it goes, then if you wnat, modify the box and then see if you notice any difference. to be honest most of it is psycological, the only real way of proving it works is to have the car on the rolling road on the same day with both air boxes and do the tests side by side.

Edited by Mini Sprocket, 20 April 2007 - 05:32 PM.

[Dev]

to be honest Sprox, i dont see modifying the air box to be of any benefit other than financial. Not when the KN gives you more plus opens the bay up a bit more too.

[CooperTrooper]

this topic has already been covered.. type in induction kits in the search for titles then scroll down to 'induction kits which one?'
I found this really helpful.
Apparently if you put an induction kit into your car it f**ks about with the ECU..which gets a shock and pours more petrol into the engine making it run rich! From what i read, it seems most intelligent to put a K&N filter (to replace the original paper filter) in the original cooper airbox.
Better fuel consumption, less noise and cheaper than an induction kit .

[Sprocket]

Apparently if you put an induction kit into your car it f**ks about with the ECU..which gets a shock and pours more petrol into the engine making it run rich! From what i read, it seems most intelligent to put a K&N filter (to replace the original paper filter) in the original cooper airbox.

Not being funny mate but, that is all ********. If you fit a free flowing air filter then its not going to give a rich mixture its going to be lean. Secondly the ECU is adaptive and adjusts over a short period to the new conditions to maintain satisfactory fueling. I know i have never had to fiddle with the ECU other than an adaptive parameters reset. Fit the hot up bits, drive around for half an hour and its good to go.

Yes the standard airbox/K&N will be much quieter, good for a stage one tune engine. It is however pants on above stage three tune, if you were to use one you would be loosing power when you paid a lot of money tuning the engine to get more. Its a simple mod and releases power, small maybe, but add all the little bits up and you can end up with 100bhp on the standard ECU

Also dont see how a standard airbox is any better on fuel consumption, compared to the induction kit.

All this hear say and myth telling is why this section is really here, so that the people in the know can help you sort out the facts from the myths and help you on your way to a happier relationship with your injection car, rather than take the fools way out.

Edited by Mini Sprocket, 21 April 2007 - 06:41 PM.

[gurkatank]

Cheers fellas, think im gonna go with 57i as it appears that'l be fine for any mods in future