how many mpg would i lose if. . .

  1. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #1
    as above^ how much mpg would be lost (if any at all) if i fitted:
    4-2-1 mani
    raceland induction kit
    sports cat.
  2. Established Member Joined: Dec 2009 Essex Posts: 1006
    #2
    7.36 roughly.
    1 user thanked this post:
  3. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #3
    7? thats a fair bit for only 3 mod's
    any ways of saving a few mpg even with these mod,s such as some sort of remap?
  4. Infrequent Poster Joined: Mar 2010 Manchester Posts: 191 mk2 saxo VTS blue
    #4
    it depends what car you the mods on?
    what you drive like?
    and 7.36 is wrong?
  5. Established Member Joined: Dec 2009 Essex Posts: 1006
    #5
    Quote:
    Originally Posted by stevie__mc View Post
    7? thats a fair bit for only 3 mod's
    any ways of saving a few mpg even with these mod,s such as some sort of remap?
    I was joking fella, anyway hello. I have no idea how much you'd lose as i'm not interested in engine tuning on saxos but expect it to come down alittle but nothing to worry about. Get it on a rolling road after to see if its running rich (i.e failing o2 sensor) then sort the problem, but thats about all you'll be able to do.
  6. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #6
    vtr at the minute. but am hopefulling getn a vts in a few weeks and am gonna be putting them mod's onto it. so its whats mpg would be lost if its a vts ?
  7. Saxperience Forum Bum Joined: Jun 2006 Swansea Posts: 4946 Bianca White Peugeot 106 S2 Rallye, Saxo VTS
    #7
    See here.
    http://www.saxperience.com/forum/showthread.php?t=59943



    This is an impossible question to answer. It depends on so many factors.

    Hence why your first response was "7.36 roughly."
  8. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #8
    the thing is i dont want to spend a few hundred pound on them parts only to find out the car is drinking the petrol. just looking a rough estimate on how many mpg would be lost. maybe someone has simlar mod's done to there own car.
    and yea ino what u mean by it depens on loads of things the car am on about tho is driving brilliantly o3 model with 36k ??
  9. Saxperience Post Whore Joined: Jan 2007 Shropshire Posts: 9994 Moonstone Blue 106 GTi
    #9
    IN all honesty mpg should improve as you won't need to thrash the tits off the car as much but mpg should be the same if you driv eit the same.

    Put it this way Adsayer with his VTS with usual mods regularly gets 40mpg+ when he wants
  10. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #10
    sounds good.

    Does camshafts upset the fuel consumption much? i might possilbly get them aswel in time lmao
  11. Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr
    #11
    Everything with a car is a trade off. Ie ride comfort/handling power/economy lower your car/hits speed bumps etc.

    Adding a cam(s) will increas the performance (WIN) but you will get a less smooth idle and use more fuel to create the extra power (LOSE).

    You see what I am getting at here?

    It all comes down to what YOU want from the car mate, there is no perfect combination unfortunately.
  12. Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS
    #12
    With breathing/exhaust mods you're unlikely to destroy you mpg dude... it's only under full throttle that the extra 'potential' is unleashed and so the mpg drops.

    Ads
  13. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #13
    yea thats what i was thinking i was hoping that a few breathing mod's wouldnt reduce the mpg that much, so thats good
    even with camshafts id probly still see between 30-40 mpg?
  14. Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS
    #14
    When you're just at cruise or low speeds, you'll be at part throttle, so a tiny amount of air is being entered into the cylinders. Breathing mods enable more air to flow at full throttles and as a result increase your power. You don't create loads of power at part throttle, so the mods effectively do nothing - which is why your mpg isn't affected at low engine loads - but will do if you boot it a lot.

    camshafts, is where it gets a bit tricky.

    You've got to remember that for more power, you've got to use more fuel, but you also need more air, specifically, more air for a given unit of time. That's why you run your engine at higher RPM to get more power. The uprated camshafts allow more air in at higher rpm's, provided you can supply enough fuel, you get more power. But it's a compromise and you lose power at the lower end of the rpm range. But again, at part throttle it isn't so much of a problem.

    But I've got no actual data or information from owners with uprated cams on the mpg... but provided you don't have a lead foot the mpg will remain largely unaffected. Lead foot it and the mpg will drop dramatically.
  15. Infrequent Poster Joined: Apr 2010 northern ireland (joyriding country) Posts: 124 1998 Saxo Vtr Black Top (for sale soon)
    #15
    i see what u mean lol will thats mainly answered my question think il go along with them mod's. hopefully