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Thread: K & N Pod filter & SRI damaging engine?

  1. Default K & N Pod filter & SRI damaging engine?

    So I've had a pod on my MPS3 series 1 for nearly two years. The difference was notable in better pickup, more urgent acceleration. I rang a tuning specialist the other day because I'm looking at performance options, and he was "oh dear, you've probably damaged your engine because it doesn't know it has a bigger intake, and will run lean and the timing will be wrong...give me $1900 (for the XA package, or stage 1 tuning upgrade with no mods) and we may have to do more work to fix the damage".
    I freaked out cursing myself for my own stupidity, and rang a mechanic mate who reckons that between the MAF and the o2 sensor the computer should compensate for better airflow.
    But the expert point-of-view is that, as I read in the tuning forum, the MAF still senses only the air flowing past it, not allowing for increased diameter, so the engine will run lean, etc.
    Is it likely that in fact I have damaged the internals of the engine?
    If not, will the Hypertech plug-in retune the engine to suit the increased airflow?
    Should I revert immediately to the stock airbox and avoid the drama altogether?

  2. Default

    As I read, the K & N diameter is 65mm, the smallest of the three, K & N, Cobb, and Corksport. Being closest to the original stock diameter, could it be less likely that the leaning/timing problem will cause damage?

  3. #3
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    Ahhhh, gotta love MRT...

    What intake is it? If it's a stock sized one (most likely) then it's fine as you said, the MAF reads air speed/density, and it knows how big the hole is, so can make a decent guess at how much air is flowing through... And yeah, when combined with o2 sensor, it makes decent adjustments...

  4. #4

    Default

    You will be fine. Don't worry.

    There is not enough of a difference to cause the MAF to read very differently and cause a serious issue. You have Fuel trims which calculate the oxygen from the exhaust and will adjust fuelling accordingly, fixing up any small inaccuracy from the MAF.
    Hypertech is OK if that's as far as you want to go, of you want more mods a COBB AP is far superior.

  5. #5

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    Sarcastic beat me to it again

  6. #6
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    Quote Originally Posted by SarcasticOne View Post
    Ahhhh, gotta love MRT...

    What intake is it? If it's a stock sized one (most likely) then it's fine as you said, the MAF reads air speed/density, and it knows how big the hole is, so can make a decent guess at how much air is flowing through... And yeah, when combined with o2 sensor, it makes decent adjustments...
    Yep! As long as the Maf size is correct you will be fine. The ecu will make changes over few hundred ks to adjust within its set parameters
    Many want Power not many hold it long.........

  7. #7
    Join Date
    Nov 2009
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    Default

    I wonder which "tuning specialist" gave you that crapped up story - maybe Sam knows :P
    plenty of ppl here and in the US just running what you are running and not an issue. Think these guys were just trying to see if they could make things look more difficult that it is...

  8. #8
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    Default

    Because this shop is run by a someone who seems to be more of a salesman than anything else.
    I'm surprised he doesn't offer a free set of steak knives with every purchase

  9. Default

    Phew, what a drama. How do did you know it was MRT ;-/ Good to hear your rather comforting posts fellas. Thanks.
    My intake is K & N...65.6mm according to the thread in Tech Talk...Hypertech post. The Hypertech thang will arrive shortly, grabbed it from a guy in Perth for $360, he's sold his MPS. Where did I read that the plug-in unit will only work on the original CPU? Hope it's not a ripoff! More dramas...hey I wish I knew what questions to ask in the first place.

  10. #10
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    Because "XA" kit is an MRT thing
    And it sounds like something he would say.

    And $360 for a HT.....well good for what you want, but a bit pricy, not far off what a 2nd hand Cobb AP would set you back

  11. Default

    Yes, $360 was what the dude wanted, and he got it...only one around ATM, 2nd hand, and there were a few other "best offers" going on it. Ah well, It'll sell again. Brad from MRT also added "there's a $500 discount offer on right now"...read; the work we do is worth $500 less than what we usually charge. It's a bit like the amazing trade-ins at Australian Fleet Sales. Maybe DIY kits like this are biting his sales pitch.

  12. #12

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    That advice is shamefull.

    And the Hypertech should work fine so long as it was unpaired from the original car before sale.

  13. #13
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    Quote Originally Posted by Locomotivator View Post
    Yes, $360 was what the dude wanted, and he got it...only one around ATM, 2nd hand, and there were a few other "best offers" going on it. Ah well, It'll sell again. Brad from MRT also added "there's a $500 discount offer on right now"...read; the work we do is worth $500 less than what we usually charge. It's a bit like the amazing trade-ins at Australian Fleet Sales. Maybe DIY kits like this are biting his sales pitch.
    Yeah, they lost every inch of respect from me when they posted a graph of a mps saying "look, it doesn't need a hpfp upgrade"

    In actual fact, they'd managed to delay the car hitting any sort of meaningful boost (15psi) till 3500 rpm (hence tuning around the problem) where as even stock we make that well before 3000rpm...

    Quote Originally Posted by Lachlan View Post
    That advice is shamefull.

    And the Hypertech should work fine so long as it was unpaired from the original car before sale.
    This ^^^
    Also, 350 for a ht is a bit expensive, think the last one I saw was sold for 200-250...
    Newbie FAQ My Build Thread
    From stock, to GT3071, to substantially less modded, many lessons learned!
    3" HTP | 100 Cel DP | Autotech HPFP | AP V3 - Self Tuned on E20 | JBR RSB | CPE S2 REM | JBR Shifter Bushings

  14. Default

    wow MRT are asking $1900 for what would be a comparitive stage 1 flash? Thats crazy.
    http://www.mrtperformance.com.au/ima...06-on-2012.pdf

    at least HP-F throw in a rem and sri and flash for $1495

    Or be a bit more budget savvy and do what everbody else here has done, that $1900 equivalent can stretch a LOOOONG way.

  15. #15
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    Quote Originally Posted by creole View Post
    wow MRT are asking $1900 for what would be a comparitive stage 1 flash? Thats crazy.
    http://www.mrtperformance.com.au/ima...06-on-2012.pdf

    at least HP-F throw in a rem and sri and flash for $1495

    Or be a bit more budget savvy and do what everbody else here has done, that $1900 equivalent can stretch a LOOOONG way.
    For $1900 you can go 3" intake, test pipe, hpfp internals, access port, e-tune, rear engine mount, rear sway bar
    Newbie FAQ My Build Thread
    From stock, to GT3071, to substantially less modded, many lessons learned!
    3" HTP | 100 Cel DP | Autotech HPFP | AP V3 - Self Tuned on E20 | JBR RSB | CPE S2 REM | JBR Shifter Bushings

  16. #16

    Default

    Quote Originally Posted by SarcasticOne View Post
    For $1900 you can go 3" intake, test pipe, hpfp internals, access port, e-tune, rear engine mount, rear sway bar
    @Locomotivator do this, you will be much happier
    Fast: RayD Tune|COBB AP|JBR|Stratified|CP-e|Xforce|Autotech|Denso|Corksport
    Turn: Bilstein|Eibach|Whiteline|JBR|Hankook RS3
    Stop: Wilwood 4pots|Custom lines|DBA T3|Remsa|TRW 600
    Rice: JL|Alpine|Focal|MiniDSP|Rota g-force|2XS|Cree|Celestial Blue FTW!

  17. #17
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    This is why I have fundamental issues with mrt. I keep hearing these scare tactics! Poor form indeed.

    Sent from my GT-I9505 using Tapatalk

  18. #18
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    @brandonjATCorkSport @CorkSport are you still in talks with MRT? Might want to see this...

  19. #19
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    Default

    Oh, and from Feb last year:
    Click image for larger version. 

Name:	uploadfromtaptalk1408057374077.jpg 
Views:	234 
Size:	68.7 KB 
ID:	16616

    My favourite graph from their Facebook page
    Newbie FAQ My Build Thread
    From stock, to GT3071, to substantially less modded, many lessons learned!
    3" HTP | 100 Cel DP | Autotech HPFP | AP V3 - Self Tuned on E20 | JBR RSB | CPE S2 REM | JBR Shifter Bushings

  20. Default

    Quote Originally Posted by SarcasticOne View Post
    @brandonjATCorkSport @CorkSport are you still in talks with MRT? Might want to see this...

    We sell parts to them but not like a, "vendor", if they have a customer that want our intake they'd order it. Beyond that not so much.

    The K&N filter will not harm your motor. The cleaner can gum up your MAF but regular cleaning will resolve that.
    Cheers,
    Brandon Johnson
    CorkSport Mazda Performance
    (360)260-2675 ext. 106
    BrandonJ@corksport.com


    CorkSport.Com

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