27 replies to this topic

[ArticMonkey]

The air filter is one of the last bits I need to complete my collection of parts. I want to make the right choice and not have to buy twice. I will be going stage 2 this year then harrop next. I don't mind the noise of the SC but when I eventually go harrop running over 350bhp its going to become an issue for some tracks. So I don't mind having an inclosed unit as long as it can flow the air needed. I'd also like the most protection for the engine once its forged. This would push me towards the paper filter route but I know there are some cone filters out there just as good. I've looked at 90% of my options but want some things cleared up before I press the pay button. Common filter used is the fook off big cosy piper filter that most use on their SC conversions. Cheap enough to buy and good for around 320bhp. Up from there I don't know many who still run them. You then have the mango ITG inclosed unit. Supposedly reduces the SC sound and good for 300bhp. Can it go beyond 300 though? Next is the Apexi filter. I would assume a 70-75mm bracket is needed for the 68 TB we use? Equivalent filtering to OEM and good for up to 400bhp. Then its the NA OEM air box. Can this me modified in any way to flow the amount of air needed (I've seen the extra feed mod but is it any good)? Or can the Dave Hardwick kit be applied to this box (as the tubby box is slightly different)? I know cliffie and techie run something else. What filter I don't know, but it seems to be doing well for cliffie at least. Your thoughts are gratefully received.

[Bargi]

Leave it add NA, done...

[ArticMonkey]

Leave it add NA, done...

But then I'd always have an excuse for being quicker than you! At least if we're both SC its a tad more fair.

[Bargi]

The JG option does have a an option for higher power but slightly less filtration

[MrSimba]

I know its not an SC but with the std filter and a 'Dave Hardwick' airbox on the EFi dyno there was absolutly NO difference between having no filter in the airbox, just an 'open' intake to the engine, and the std filter with Dave's deretricted airbox, and that was at over 400bhp! Derestrict the airbox & stay standard for best filtration!

Edited by MrSimba, 07 August 2013 - 08:18 PM.

[ArticMonkey]

I know its not an SC but with the std filter and a 'Dave Hardwick' airbox on the EFi dyno there was absolutly NO difference between having no filter in the airbox, just an 'open' intake to the engine, and the std filter with Dave's deretricted airbox, and that was at over 400bhp! Derestrict the airbox & stay standard for best filtration!

This does sound like the best option for engine safety and flow. Price is a little eye watering but I'm sure something can be done. Even if I made my own take on the box flow. Biscuit tins riveted together like Lee's build for instance.

[Nev]

You could easily just make your own from 2 OEM filters. That way you ensure that you are getting high particle filtration, it will cost peanuts to make and lastly you know it will flow well enough. Hell you could even make a 3 panel filter !

 

One thing I can say though (through personal experience and listening to a couple of other 360 BHP owner cars) that minimising pressure loss over the air filter is really fundamental to getting good power. In my case when I built my own filter + larger bore intake pipes I epic amounts more power (around 45 BHP at a guess).

 

good luck either way, shame I never got a psx ride when it was NA (my fault for not re-finding you at the National)!

 

 

Edited by Nev, 07 August 2013 - 08:24 PM.

[Gedi]

The standard paper air filter is good for over 500bhp. It also filters the air much better than these aftermarket ones.

There's no reason to change, in fact people that do are generally reducing the life of their engine due to poorer filtration.

[ArticMonkey]

You could easily just make your own from 2 OEM filters. That way you ensure that you are getting high particle filtration, it will cost peanuts to make and lastly you know it will flow well enough. Hell you could even make a 3 panel filter !   One thing I can say though (through personal experience and listening to a couple of other 360 BHP owner cars) that minimising pressure loss over the air filter is really fundamental to getting good power. In my case when I built my own filter + larger bore intake pipes I epic amounts more power (around 45 BHP at a guess).   good luck either way, shame I never got a psx ride when it was NA (my fault for not re-finding you at the National)!    

Limited space in the ear for a SC conversion but its something not been tried yet. Hmmmmm, where's joe and his dremmal? You had a try in all different types on the day which was a great way to learn what each can do. Perhaps when you have brakes and suspension to match your engine (banter) ill allow you to take me for a spin!?

[Nev]

Perhaps when you have brakes and suspension to match your engine (banter) ill allow you to take me for a spin!?

 

 

Admittedly I only have RC6 pads and OEM callipers, but what is it that you think is wrong with my suspension?

[ArticMonkey]

It's was meant in jest.....but while we're here. You have nitron single ways do you not? So your suffering from lack of droop? What spring rates? Who does your geo? I've not read your blog as of late, but the little I know, this area has had little touched. We all like to teas you on your cars use but I think with the correct set up it would be more than handy on track.

[rik]

http://www.knfilters...px?Prod=RE-0910

 

[Andrew aka Stuwy]

if you can find the space, then surly an air box from a v8 or some other 400 bhp standard car would be cheap on ebay?

[ArticMonkey]

if you can find the space, then surly an air box from a v8 or some other 400 bhp standard car would be cheap on ebay?

Have you seen what area we have to work with!

[Andrew aka Stuwy]

yes but when I have the car in bits the space is always bigger then I remember..

 

Maybe when I'm in the arch liner this weekend I will get the tape measure out..

[rik]

yeah there's a fair amount of room actually when you think about it

[Sticky]

Lee has freed up a load of space by fitting the coupe back (and cake tins)

[ArticMonkey]

Lee has freed up a load of space by fitting the coupe back (and cake tins)

So I need to spend £2k on a coupe back for me to access more space?

[Sticky]

Lee has freed up a load of space by fitting the coupe back (and cake tins)

So I need to spend £2k on a coupe back for me to access more space?

Errrrr....yes They are £845 from JJJ

Edited by Sticky, 07 August 2013 - 10:14 PM.

[techieboy]

I don't mind the noise of the SC but when I eventually go harrop running over 350bhp its going to become an issue for some tracks. So I don't mind having an inclosed unit as long as it can flow the air needed.

Remember, the Harrop is massively quieter than an overdriven M62. So you might be trying to solve a problem that doesn't really exist.

I run the Pipercross VM-7000 with the 100mm intake option and 80mm exit to the throttle body. It's allegedly good for 400bhp and it's definitely knocked a few db's off at the high pitched end of the SC noise and generally feels a little more muted than the sh!tty great big Cosworth cone filter and whatever it was Courtenay's fitted before that.
 

if you can find the space, then surly an air box from a v8 or some other 400 bhp standard car would be cheap on ebay?

 
I've tried to fit a few. The problem with air boxes from powerful NA V8's is that they're either meant to fit in the V or above the V or they have stupidly shaped flat intakes and ducting to sneak a bit of air from a slot behind a grill etc.

Best bet may still be to use the NA airbox as Exmantaa did on somebodys conversion. Winstar reckoned with a few of the normal mods to the airbox trumpet etc, that it was more than man enough for the job and was better designed than the turdo's airbox (which I also tried). I'd have it in the car now, if the ECU wasn't located where it is, though Exmantaa did manage to squeeze it in.