Results 1 to 11 of 11

Thread: Serious question about Low rpm 6th gear

  1. #1
    Newbie Rajdeep's Avatar
    Join Date
    Sep 2015
    Location
    Mississauga
    Posts
    62
    Thanks
    0
    Thanked 4 Times in 3 Posts
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)

    Default Serious question about Low rpm 6th gear

    I was watching this video and he said that on turbo cars mostly speed3 and focus st, when we floor on 6th gear having low rpm we can blow the motor ? is this true ? i have done that multiple times already but if its true i will always downshift and never gather boost on 6th gear. please let me know what you guys know about this. i have had my speed3 for about 3 months now so i am trying not to blow it right away, cant afford that right now. thanks.
    http://youtu.be/z5_K2P49hyw

  2. #2
    Jr Member dexter's Avatar
    Join Date
    Nov 2011
    Location
    Barrie
    Posts
    356
    Thanks
    2
    Thanked 15 Times in 14 Posts
    Mentioned
    11 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Have you read anything about our fuel pumps? That would probably be your best place to start reading on this subject.

    If you haven't upgraded your HPFP I would probably avoid going WOT in 6th gear if you're under 3k rpm but that just me.
    JBR SRI | JBR TIP | Ultimate Racing Catless Test Pipe | Autotech HPFP Internals | JBR 80A RMM | CP-e TMM | JBR Spherical Series Heavy Shift Knob | Eibach Prokits | Cobb AP | Rally Armor UR | Weather Tech Liners


  3. #3
    Moderator loki's Avatar
    Join Date
    Mar 2011
    Location
    Toronto
    Age
    42
    Posts
    18,049
    Thanks
    1,911
    Thanked 6,154 Times in 3,173 Posts
    Mentioned
    881 Post(s)
    Tagged
    1 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    you don't want to floor the car applying that much load at low RPMs in the tallest gear

    that should be common sense

  4. The Following 2 Users Say Thank You to loki For This Useful Post:

    boyracer (12-09-2015),S.F.W. (12-09-2015)

  5. #4
    Sr Member Flagrum_3's Avatar
    Join Date
    May 2005
    Location
    Scarborough
    Posts
    6,355
    Thanks
    345
    Thanked 382 Times in 307 Posts
    Mentioned
    108 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Quote Originally Posted by loki View Post
    you don't want to floor the car applying that much load at low RPMs in the tallest gear

    that should be common sense
    Someone once said; "Common sense is the least of the senses" ; )


    Depending on what speed/rpms your doing, its usually suggested; Whilst cruising, you drop a gear then accelerate, to accelerate. Unless your in a snottomatic.


    _3

  6. #5
    Jr Member paulabreu's Avatar
    Join Date
    Nov 2011
    Location
    Keswick
    Posts
    638
    Thanks
    148
    Thanked 161 Times in 83 Posts
    Mentioned
    38 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Quote Originally Posted by Rajdeep View Post
    I was watching this video and he said that on turbo cars mostly speed3 and focus st, when we floor on 6th gear having low rpm we can blow the motor ? is this true ? i have done that multiple times already but if its true i will always downshift and never gather boost on 6th gear. please let me know what you guys know about this. i have had my speed3 for about 3 months now so i am trying not to blow it right away, cant afford that right now. thanks.
    http://youtu.be/z5_K2P49hyw
    yes

  7. #6
    Member
    Join Date
    Jun 2008
    Location
    Markham
    Ride
    2017 Mercedes Benz C43
    Posts
    1,715
    Thanks
    25
    Thanked 23 Times in 17 Posts
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Why would you want to floor it on 6th gear at low rpm?
    1994 Mazda MX-6 Mystere - SOLD
    2001 Mazda Protege MP3 - SOLD
    2007 Mazda Mazdaspeed3 - SOLD

    BYE MAZDA


  8. #7
    Newbie Rajdeep's Avatar
    Join Date
    Sep 2015
    Location
    Mississauga
    Posts
    62
    Thanks
    0
    Thanked 4 Times in 3 Posts
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    i was always above 3000 on 6th. so i guess i was good. i obviously downshift all the time, its the best thing to do anyways. thanks guys

  9. #8
    Jr Member
    Join Date
    Aug 2010
    Posts
    650
    Thanks
    0
    Thanked 2 Times in 2 Posts
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    You know there's this tiny computer call a ECU under the hood? And that your car can't operate without it? And that one of it's job is to control things so the engine don't self destruct?

    I think you are worrying too much. It is possible to do something to kill your car for sure by being stupid, but asking the computer (it is a throttle by wire system after all) for more power at low RPM shouldn't be one of them.

  10. #9
    Jr Member paulabreu's Avatar
    Join Date
    Nov 2011
    Location
    Keswick
    Posts
    638
    Thanks
    148
    Thanked 161 Times in 83 Posts
    Mentioned
    38 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Quote Originally Posted by gotak View Post
    You know there's this tiny computer call a ECU under the hood? And that your car can't operate without it? And that one of it's job is to control things so the engine don't self destruct?

    I think you are worrying too much. It is possible to do something to kill your car for sure by being stupid, but asking the computer (it is a throttle by wire system after all) for more power at low RPM shouldn't be one of them.
    http://papers.sae.org/2011-01-0342/

    http://stratifiedauto.com/blog/low-s...oboost-motors/

    The root cause is a phenomenon called Low Speed Pre-Ignition (LSPI).

    LSPI, which results in Superknock, is auto-ignition before the spark but not early enough to melt the piston. It happens close to the spark event and causes massive knock afterwards. Damaging knock.

    The other interesting fact about LSPI is that it happens at low engine speeds and high loads which is a common condition when passing on the highway, for example. Below is a graphic showing the knock in the cylinder just after LSPI occurred:


  11. #10
    Jr Member crasth's Avatar
    Join Date
    Mar 2014
    Posts
    326
    Thanks
    37
    Thanked 86 Times in 59 Posts
    Mentioned
    54 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Quote Originally Posted by dexter View Post
    Have you read anything about our fuel pumps? That would probably be your best place to start reading on this subject.

    If you haven't upgraded your HPFP I would probably avoid going WOT in 6th gear if you're under 3k rpm but that just me.
    I think flooring it in 6th gear has more to do with rods that fuel pumps.
    2010 CWP ms3

    ENGINE

    -corksport stge 2 sri + tip,cpe hpfp,cobb ap,turbosmart BOV 50/50,jbr boost tubes,bpv hose
    SUSPENSION
    -H&R lowering springs, koni yellow shocks

  12. #11
    Jr Member crasth's Avatar
    Join Date
    Mar 2014
    Posts
    326
    Thanks
    37
    Thanked 86 Times in 59 Posts
    Mentioned
    54 Post(s)
    Tagged
    0 Thread(s)

    Default Re: Serious question about Low rpm 6th gear

    Quote Originally Posted by dexter View Post
    Have you read anything about our fuel pumps? That would probably be your best place to start reading on this subject.

    If you haven't upgraded your HPFP I would probably avoid going WOT in 6th gear if you're under 3k rpm but that just me.
    Damaging the car going wot in higher gears has to do with the engine's weak rods. I doubt it has anything to do with the fuel pump

Similar Threads

  1. Where to get Top Gear?
    By Scottobot in forum General Lounge
    Replies: 11
    Last Post: 01-02-2015, 07:38 AM
  2. Question about general gear shifting RPM
    By jiayang0103 in forum Mazda3 General Discussion
    Replies: 22
    Last Post: 10-08-2010, 09:20 AM
  3. Gear Shift gets stuck between N and 1st Gear
    By colinchrisc in forum Problems with the Mazda3
    Replies: 9
    Last Post: 08-08-2010, 07:34 PM
  4. Top Gear
    By Mazda3X2 in forum Pictures and Videos
    Replies: 2
    Last Post: 11-15-2008, 10:06 AM
  5. gear changes on AT
    By vblanche in forum Mazda3 General Discussion
    Replies: 9
    Last Post: 05-23-2007, 06:31 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •