rev information

1. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #1 1st June 2009, 18:41

   just after some information it isnt for a saxo but i think you engine/performance guys would know the answers im looking for
   
   im looking at tuning a 4 pot bmw engine, the powerband on the cams stops a 7.8k
   
   what would i need to upgrade to alloy the engine to rev that high without everything going bang?
   
   regards,
   rob c.
2. scot-ish Established Member Joined: Apr 2009 just aroon the corner Posts: 1509 Audi S5, Corsa, Defender 90 CSW

   #2 1st June 2009, 18:43

   nothing to be fair mate, whats the standard rev limit?? 4 pot?? 4 cylinder??
   
   what engine is it ?? and to be honest, a 20 min search on a bmw forum, would get you definate answers
3. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #3 1st June 2009, 18:50

   my standard rev limiter is about 6.25k, here is a picture of the clocks so that you can see http://i18.ebayimg.com/02/i/001/31/67/d8f4_1_sbl.JPG
4. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #4 1st June 2009, 18:51

   you could rev it that hard on standard internals ect. just get the cams and remap sorted
5. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #5 1st June 2009, 18:52

   rev at 7.8k on standard internals? thats abit far isnt it going from 6k to 7.8k without upgrading internals
   
   should i atleast upgrade valve springs and things like that?
6. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #6 1st June 2009, 18:54

   i have also been searching for the best cams for it, and i notice that cat-cams do not show the powerband figures e.g 2000-6500rpms, why is this?
7. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #7 1st June 2009, 18:55

   because catcam dont know , i personally would have the whole head rebuilt ew valves, springs etc but you can get them remapped to rev much higher without and mods. just fuel and air mixture mapping
8. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

   #8 1st June 2009, 18:58

   do you mean new valves and springs or bigger valves and stronger springs mate?
9. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #9 1st June 2009, 18:59

   well either, depending on the millage on the engine. obviously if your going to do it then uprated is the way forward
10. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #10 1st June 2009, 19:05

    yeah, i think il find out how much its going to cost to get a head rebuild with uprated valves and springs
    
    the cams powerband is 7.8k if i get the car remapped to 8k and just set the limiter to 7.8k on my omex rev limiter with launch control, do you see any problems with that? also will get a new timing chain put on
11. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

    #11 1st June 2009, 19:06

    sounds good to me, make sure you get the breathing mods sorted on it
12. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #12 1st June 2009, 19:09

    at the moment i have the following...
    
    green cotten powerflow induction kit with cold air feed pipe
    4-2-1 manifold
    decat
    devil backbox
    
    looking at upgrading the inlet manifold as i think i would need it as im going to be reving up to 7.8k instead of the standard 6.25k
    
    i have also got the omex rev limiter with launch control on my car
13. col101 Frequent Poster Joined: Mar 2009 York Posts: 768 VTR

    #13 1st June 2009, 21:25

    So this is an E36 318?
    Is it the IS (16V)?
14. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #14 2nd June 2009, 01:42

    it is an e36 318ti mate, 1.9 16v
15. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #15 2nd June 2009, 09:34

    just put an m3 engine in.
16. Rob-C Established Member Joined: Nov 2007 Maidstone Posts: 1223 Citroen Saxo VTR MK2

    #16 2nd June 2009, 11:54

    too much money mate lol, you have to change the engine, box, diff, loom everything... your looking well over £1k just for the engine let alone the box, diff and other bits n pieces
17. user_22749 Saxperience Post Whore Joined: Apr 2008 N.Wales Posts: 7746 e46 M Sport

    #17 2nd June 2009, 11:58

    Ye but would be totally worth it
18. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #18 2nd June 2009, 12:15

    Quote:

    Originally Posted by Rob-C too much money mate lol, you have to change the engine, box, diff, loom everything... your looking well over £1k just for the engine let alone the box, diff and other bits n pieces

    be better off doing that though imo, my mate done it to his 328, just bought a crashed m3 and swapped it all over, better than spending loads for 20hp or whatever.
19. col101 Frequent Poster Joined: Mar 2009 York Posts: 768 VTR

    #19 2nd June 2009, 22:53

    Williamvts speaks sense here.
    However, isn't the 318ti the 3 series compact?
    If so, (as previously a BMW trained mechanic) this is an asthmatic engine and will take major money to make good power.
    A M3 conversion is even more complicated by the compact size (propshaft and diffs are not upto the job - don't think E46 ones fit either) and would need alot of parts custom fabricating. Would be awesome though.
    
    edit: might be worth looking to source parts from a Z3 for the M conversion