k&n kit

[The ron]

has anyone fitted one or got one on there car ????? extra 13bhp sounds good 4 the money

http://cgi.ebay.com/ebaymotors/ws/eBa

[Bonnie and Clyde]

I was told recently that there were very little gains over the standard air intake with K&N other than top end. If you want better air flow go for OTRCAI. It's a far more direct system. I doubt very much that you'd see a gain of 13bhp.
I may be wrong but thats my view

[Wolfracer]

Bonnie and Clyde said:

I was told recently that there were very little gains over the standard air intake with K&N other than top end. If you want better air flow go for OTRCAI. It's a far more direct system. I doubt very much that you'd see a gain of 13bhp.
I may be wrong but thats my view

You're not wrong about the K&N, can't comment on OTRCAI though..

[drew ss]

Bonnie and Clyde said:

I doubt very much that you'd see a gain of 13bhp.
I may be wrong but thats my view

every little helps and adds up

[007 VXR]

drew ss said:

Bonnie and Clyde said:

I doubt very much that you'd see a gain of 13bhp.
I may be wrong but thats my view

every little helps and adds up

+1

[stigmundfreud]

whats teh flow rate of the paper filter vs the k&n, also oil = great for damaging the maf.

consumed cfm at 6000rpm (assuming VE of say 90 for example) = 379 * 6000 * 0.9 / 3464 = 606cfm

The CFM rating for the K&N filter for our cars is 633.9, the CFM rating for the paper filter is nowhre to be found but that figures all based on assumption of 90% ve efficiency which the trims would appear to disagree with. You need to match your exhaust potential flow rates to be good enough to scavenge. I doubt that any panel filter is giving any benefit at all other than the cost savings over the life of a car.

[behold81]

Bonnie and Clyde said:

I was told recently that there were very little gains over the standard air intake with K&N other than top end. If you want better air flow go for OTRCAI. It's a far more direct system. I doubt very much that you'd see a gain of 13bhp.
I may be wrong but thats my view

Something i was told a few years ago is that the figures given on performance parts are guided in 2 ways.

1. The advert states and increase of 10BHP over the STOCK HP giving a increase of 10bhp

2. If not and it says the part give a in increase of 10BHP. This can normaly means that this part is worth 10bhp of the overall engines performance. If you know what the stock part produces you find your increases. E.G standard Airfilter is 7BHP then the GENUINE Increase is actually only 3BHP.

There are other conditions on some that 13BHP is only achivable with a performance exhaust ETC.

Hope that makes sence.

[Wolfracer]

How does a standard filter produce hp? Maybe you could measure the drop in hp from unrestricted flow to filtered flow both oem and aftermarket? Difference would be hp gain.. Figures are generally maximum recorded, if they tested 100 times and only got the 13hp once it would still be a valid statement. Also would it not be cheaper for manufacturers to install better filters than spend millions on engine development to increase hp? Just my cynical view...

[ringram]

Im hoping to do some intake tests soon.
I need to have a word with a couple of people to borrow some intakes though.
Ill run them on my engine. The plan is

Open, no filter (or maf)
Stock intake and filter (+ maf)
Russo intake
Orssom intake
Duspeed intake
If I can I might try a K&N panel filter too

Maybe Gareth can help me with the duspeed intake side of things and someone with an orrsom intake can loan me one, or come along on the day so I can borrow it!? Also K&N panel filter. Plus any other intake anyone has not listed above..

Ill record intake vaccuum and of course a dyno run with AFR in case that changes. All runs will be mafless, but the intakes with maf requirements (ie Stock) will have it installed inline (but disabled)

If you can help with an Orssom or Duspeed intake please let me know. Im hoping to test in around a months time at SRR.

[stigmundfreud]

when you say no maf, are you totally removing it or just zeroing out the resolution?

Also my next planned update is OTRCAI and I am running on rollers this Friday to base line

[ringram]

Good, so you will enjoy the results then!

Maf calculations will be disabled through DTC P0102

I recon one of the otrcai's will come out best, but we will see.

[hsv_v8]

The ron said:

has anyone fitted one or got one on there car ????? extra 13bhp sounds good 4 the money

http://cgi.ebay.com/ebaymotors/ws/eBa

Hi, I fitted one to my vxr 6.0l. I have to say it did sound good but suffered noticeably with heat soak in traffic, even in relatively cool ambient conditions. Difficult to comment on power gains as I only dyno'd mine after the filter, exhaust and mapping changes.

[stigmundfreud]

ringram said:

Good, so you will enjoy the results then!

Maf calculations will be disabled through DTC P0102

I recon one of the otrcai's will come out best, but we will see.

P0102?
b1099 from memory (as its a few years now!) you can zero that table out and keep the maf plugged in but effectively its teh same as disabling dtc, adjusting voltages and removing the plug (so retains IAT sensor) well b5001 on the old ls1 ecu - might be an easier way of doing things?

[V8NHH]

stigmundfreud said:

ringram said:

Good, so you will enjoy the results then!

Maf calculations will be disabled through DTC P0102

I recon one of the otrcai's will come out best, but we will see.

P0102?
b1099 from memory (as its a few years now!) you can zero that table out and keep the maf plugged in but effectively its teh same as disabling dtc, adjusting voltages and removing the plug (so retains IAT sensor) well b5001 on the old ls1 ecu - might be an easier way of doing things?

WTF!!!
Just got in from work to try and relax and more techy stuff..where is my beer
....ahhhh thats better

K+N panel filter I have fitted to my car, always run them just preference over stock.
As for item originally listed this will improve airflow over stock but will suffer from heat soak unless pod filter is situated away from heat or has sufficient cooling pipe feeds (as per KN57i pipework), any pod filter in engine bay with guard around it or not will suffer same fate unless piped cool air fed.

OTRCAI will come out on top but on a cost per bhp basis the pod filter will win out, (as said only downside is heat soak)
Reckon comparison same car same engine etc will show that out, dyno won't prove anything as need real world airflow and IAT stats on same route speeds etc...
Thats my pennies worth

[stigmundfreud]

but if you do a static test you get an indication as to differences. I'll log AirFlow on dyno too - you have exhaust and panel filter, be good to see what teh flow differences are and also take a look at what kPa we hit at wide open. Less than 100 and somethings a bottleneck

[V8NHH]

stigmundfreud said:

but if you do a static test you get an indication as to differences. I'll log AirFlow on dyno too - you have exhaust and panel filter, be good to see what teh flow differences are and also take a look at what kPa we hit at wide open. Less than 100 and somethings a bottleneck

I could bring the original filter with me hows that for a direct comparison?
only 3mins to change

[stigmundfreud]

if theres time after we;ve done the logging yeah why not!

[donk r8]

ringram said:

Im hoping to do some intake tests soon.
I need to have a word with a couple of people to borrow some intakes though.
Ill run them on my engine. The plan is

Open, no filter (or maf)
Stock intake and filter (+ maf)
Russo intake
Orssom intake
Duspeed intake
If I can I might try a K&N panel filter too

Maybe Gareth can help me with the duspeed intake side of things and someone with an orrsom intake can loan me one, or come along on the day so I can borrow it!? Also K&N panel filter. Plus any other intake anyone has not listed above..



You can borrow my otrcai before I sell it......................

Ill record intake vaccuum and of course a dyno run with AFR in case that changes. All runs will be mafless, but the intakes with maf requirements (ie Stock) will have it installed inline (but disabled)

If you can help with an Orssom or Duspeed intake please let me know. Im hoping to test in around a months time at SRR.

[scarebus]

My wife says I am obsessed with this forum..... but you guys?? Techie talk at 0115am??
wow that is dedication!

So whats the verdict then? Can I get my Orssum intake yet?

Edited by scarebus on Thursday 25th March 08:18

[maxmc2]

It may not give out any gains, but it makes the engine sound a wee bit more throaty