Hi
my car will be running circa 430bhp and I would like to keep the original air box with a K&N filter in
will this be sufficient or will I need to go to a cone filter
cheers

 

jason_nike just posted the other day on the post about turbo chatter that he felt the original air box was not good for his engine and swapped it for a cone filter which made a big improvement.My 2wd Saff is 450bhp and has always had a cone filter, although mine is inside an alloy group A airbox.

 

As far as I am aware the standard air box is restrictive when starting to push power levels but many change to the RS500 style box lid and run a lot more power than you are looking for so you can keep the airbox and just change lid rather than going over to a cone.

Anyone now what power the stardard airbox becomes a restriction?

 

Thanks
I brt the RS500 lid is a rare part

 

Seen a few places offering reproduction copy's of the lid so I think you can buy them new without paying genuine RS500 prices.

 

I bet at today's crazy prices if there was a genuine one for sale some greedy seller would be asking over Ł500 for it!!!!

 

Both mine are running stage 3, with the standard airbag it was a lot more restrictive compared to a big cone filter which I now currently run in both

 

Just gone back to the standard airbox in a bid to tidy up the engine bay, did love the sound of the group A cone filter but it had seen better days!

 

Have you tried it out yet Dan ,to compare performance you had with the cone filter? You obviously like the more standard look in the engine bay so from that point of view I guess you are pleased with it?

 

I’ve only driven it back from Daves which is about an hour and a half drive but that was with no boost as just had borgwarner 7064 fitted.
Its deffo quieter but won’t know performance wise until new ecu is fitted by autodynamix.
Cant see how performance will be effected as the standard airbox cold air feed is the same size as a T34 inlet diameter wise.
Sure standard airbox is good for 500hp which is more than I’m going for

 

Got to be a cone filter everyday. They just sound cooool.

 

[QUOTE=dan le moignan;6803004]I’ve only driven it back from Daves which is about an hour and a half drive but that was with no boost as just had borgwarner 7064 fitted.
Its deffo quieter but won’t know performance wise until new ecu is fitted by autodynamix.
Cant see how performance will be effected as the standard airbox cold air feed is the same size as a T34 inlet diameter wise.
Sure standard airbox is good for 500hp which is more than I’m going for[/QUOTE]
Probably in your case you are'nt really going to be able to see what difference it makes as you are going with the new turbo and ecu which will give more power anyway. Are you fitting bigger injectors as well?

 

Yes you will be correct I think, way too much will have changed for me to tell.
If it’s too quiet I will switch back to a group a cone.
Yes 1000cc injectors I think, coil on plug, wide band lambda etc

 

Dont use a warm sof filter if you can help it either modify a standard box or make one to get the best air feed you can

 

[QUOTE=dan le moignan;6803155]Yes you will be correct I think, way too much will have changed for me to tell.
If it’s too quiet I will switch back to a group a cone.
Yes 1000cc injectors I think, coil on plug, wide band lambda etc[/QUOTE]
Sounds like a good upgrade Dan, new ecu for the high impedence 1000cc injectors i presume? Should be good for 450bhp +!!

 

Yes link fury ecu, was going with monsoon but thought it was worth paying extra to gain wideband lambda and knock control.
Anything around 450 I will be happy with.

 

[QUOTE=dan le moignan;6803182]Yes link fury ecu, was going with monsoon but thought it was worth paying extra to gain wideband lambda and knock control.
Anything around 450 I will be happy with.[/QUOTE]
Will be interesting to see what your results are once it's mapped and how much boost it runs to make the 450 point.
Im already running a Link Thunder which made 425bhp on the T34 before it died. Currently going the opposite way to you and having the new Garrett G25 turbo fitted rather than the EFR turbo so will be interesting to see how the 2 compair with when and where they make power in the Rev range.

 

Yes sounds good!
my engine is standard bar a WRC head gasket so will let you know how I get on

 

[QUOTE=dan le moignan;6803204]Yes sounds good!
my engine is standard bar a WRC head gasket so will let you know how I get on[/QUOTE]
I'm on a standard bottom end other than valve pockets cut in to the pistons. Mildly ported and polished head with a inlet cam and a hart plenum and ARP Stud and nut kit but otherwise pretty much standard engine. Not sure what power it will make but my mapper said he would set a base line of 450bhp and see if he thinks it's safe to push more without stressing the engine as I'm not looking to build another one at the moment and would rather reliability over increased power.

 

Sounds like we have similar aims/ plans then!
Be interesting to compare graphs when done.
I also have airtec RS500 cooler and small turbo inlet plenum with 14mm spacer.
I did have the option of ARP studs but decided to stick with standard reinz bolts.
Want to keep everything on the safe side so happy to let it make what ever but anything around 450 would be good.

 

Hi Dan, not sure with your car having the 4x4 drivetrain but in my old 2wd Saff 450bhp certainly makes it lively!

 

Hopefully it should be enough as felt 4x4 with 380 Just was not quite enough power.
Should feel faster with less lag also

 

Will be interesting to see if they think the stardard air box is restrictive when it's mapped.

have you already got an uprated box fitted or are they going to restrict the torque to keep the gearbox in one piece ?

 

I can’t see it being an issue but will let you know.
I have a Pete Dougherty box with straight cut 2nd and 3rd gears.

 

Mate of mine had the same box in his Escort. Worked well but the noise use to drive me mad, it confirmed I don't want a straight cut box in my saph. Think I'm going to put a big tooth box from Gearboxman in mine next year as the old T5 is getting rather noisy

 

That’s the beauty of it though 1st 4th and 5th are standard so not noisy at all on the motorway etc.
If all gears were straight cut it would drive me nuts but the weak links are 2nd and 3rd.

 

The cog on the input shaft to secondary shaft is also supposed to not be that strong and that cog is used in all gears except for fourth, as that is a direct connection between input and output shafts. So I guess input shaft on yours is not straight cut then?

 

You can add uprated input shaft but was told it was not needed.
Mostly 2nd and 3rd gears that cause the issues. Layshaft is usually an issue with hard launches etc which I won’t be doing
i know of people putting 500hp through the same box for years with no issues so fingers crossed it will be fine

 

My T5 was a completely rebuilt/uprated box from Bara Motorsports and so far it's been coping well with the power level on my 2wd Saff .I think once you get up into 500 -600+ bhp you have no option but to go for a much stronger straight cut gearbox and the noise that goes with it. Was up at Castle Combe recently and the noise from the gearboxes of some of the trackday cars was very loud!

 

Cossie51 let us all know when you get it mapped

 

will do mate.
Currently waiting on the manifold being made then they can fit it with the new turbo and map it as the car is already with them.

Not going to be pushing the power as want it reliable but should see 450 + I'm more interested to see how quick it comes on boost as not found anyone that's run a Garrett G25 turbo on a YB engine yet but compared to my T34 it should be a massive improvement and run a lot less heat as T34 was maxed out and warn out.