GT30r run a HKS cone filter or RS2 Airbox?

[Jamo]

I'm not a big fan of cone filters but can I get peoples real life opinions on those who have fitted the HKS with a Garrett turbo?

What is the heat soak like?

Does performance drop of in traffic?

034 have developed a hose that allows the GT30r to be used with a stock airbox, problem is the cost is $240 vs $100 for a HKS filter.

Of course there would have to be some modifications to the RS2 airbox to get it to fit in the 1st place.

Opinions please.

[Jaap]

034

Do like the 034 option, but would it take a Sport Q. Maf??

[Rocco]

pipercross cone filter works perfect in my car,of course it is some "shielded"


for me it´s much better than the oem 3b airbox in perfonmance and noise

[GazzaG60]

heat soak is large as you would expect. a shield helps quite a lot. placement on the filter down the front below the exdhaust really helps. i dont get heatsoak down there. filter is always cold.

power when in traffic if you get soak drops slightly. its not just the filter but the intercooler too that contributes to the drop of power. 30 seconds of travel and a boost run and its all much of a muchness. id expect a 30r can flow aroung the 580cfm. that wont get warm whilst being sucked in. also the difference between warm and cold boosted air at the exit of the turbo is very little. its the intercooler that does the business.

when i had my corraqdo G60 i got lots of heatsoak due to the continous compression that the glader does. intercooler would be heatsopaked in around 2 mins in traffic. power then dropped off massively. with a turbo it aint too bad.

the air box helps keep things even all the way. cone for peak everytime.

[GazzaG60]

a much bigger one than a pipercross is recommended. the hks work well but cost loads.

when i fitted the hks one i couldn't close the bonnet as i was fitting it straight off the turbo. i swapped it over for a unifilter

mine sits just behind the intercooler and seems fine there

[S2_Dave]

@Jamo: Very noticeable, even when I was just testing for a couple of weeks (not being pushed hard). It's definitely benefited from having a box built around the filter, but it's not been tested in hot weather yet so it's not a fair comparison.

@Jaap: Why do you want to use the SQ maf? You'll get into scaling problems, assuming you're sticking with the stock ECU.

[aronmatic2]

hks filter= -15hp

[Rusty]

I think I'd design my own airbox to fit the space available and get some proper cold air in there too then run a cone inside that. Get it made of ally and welded up or make a template and have it carbon fibred. Otherwise something Dahlbackesque or indeed have a punt at the 034 effort to ensure decent shielding.

[Rusty]

Oh, and the airbox sounds better than a cone IMO.

[Jamo]

I think I'd design my own airbox to fit the space available and get some proper cold air in there too then run a cone inside that. Get it made of ally and welded up or make a template and have it carbon fibred. Otherwise something Dahlbackesque or indeed have a punt at the 034 effort to ensure decent shielding.

your obviously over estimating me. Design an airbox?



I want to know more about this, what fits behind the shield etc

http://www.s2forum.com/forum/showthread.php?t=32266

[M_GORDON]

I´ve probed a lot of filters, and the Pipercross was the best.
And Pipercross have a lot of tipes of cones.
One of my family have one very big! bigest

[Rusty]

your obviously over estimating me. Design an airbox?

What I meant was a shielded and sealed box with very good cold air feed to house a cone filter. Doesn't have to be fancy, just better than a cone and a shield. The box could tap into the cold air in the inner wing, oil cooler duct or grille if you're running a reverse IM.

Another idea is like the old rally cars. They took air from the scuttle but packaging on the S2 might be a pain..

[GazzaG60]

yuo could use the already fitted airbox of the wing. put the filter in there. we used to do that on G60 too.

[Rusty]

Yeah, that's the sort of thing. By extending that area with a box you could fit a big filter suitable for 500bhp.

[EspenW]

Cone filters will have to be shielded and sealed extremely well in order to work.
Heated air not only have lower density, but it increases the pressure ratio as well, causing the turbo to work even harder in order to achieve target boost. This further heats the air and lowers density.

I have posted this torque curve plenty of times before, but it proves the point. The difference would most likely have been even larger on a turbo engine since the higher EGT/turbo would increase the temperature of the induction air further. The power loss with the cone filter vs. stock S6+ airbox w/paper filter was pretty massive. The graph was generated on the road on a 10c ambient day, so none of the excuses such as cone filters "only" showing losses on a RR apply