Which Carbs To Use?

  1. #1
    Hi Friends!

    Just wondering what Carbs are best to use with a MK2 Single Plug VTR Engine? The Engine will have a high spec, but I just want a guide on what Carbs to use as I'm bored of Injection and Want to try Carbs.

    Thanks and Merry Christmas Friends!
  2. #2
    you mean throttle bodys?
  3. #3
    Quote:
    Originally Posted by Bikekid450 View Post
    Hi Friends!

    Just wondering what Carbs are best to use with a MK2 Single Plug VTR Engine? The Engine will have a high spec, but I just want a guide on what Carbs to use as I'm bored of Injection and Want to try Carbs.

    Thanks and Merry Christmas Friends!
    You do realise carbs arn't as good as fuel injection right? So you actually making the car's performance worse.

    what about throttle bodies instead?
  4. #4
    Use bike throttle bodies

    You could use the GSXR 600 as the GSXR1000 might be a bit over kill IMO...
  5. #5
    Quote:
    Originally Posted by Saxo_vtr View Post
    You do realise carbs arn't as good as fuel injection right? So you actually making the car's performance worse.

    what about throttle bodies instead?
    I wonder how many time before people have been told this, and does he know how much itb's are??
  6. #6
    Quote:
    Originally Posted by DaN90 View Post
    I wonder how many time before people have been told this, and does he know how much itb's are??
    Do you know how much work would be involved to get rid of the fuel injection and replace it with carbs? All for something that is worse than standard?

    If he is going to do anything then i suggest he saves and gets throttle bodies.
  7. #7
    Quote:
    Originally Posted by Saxo_vtr View Post
    Do you know how much work would be involved to get rid of the fuel injection and replace it with carbs? All for something that is worse than standard?

    If he is going to do anything then i suggest he saves and gets throttle bodies.
    I wated to put carbs on for something different, plus The Engine I am rebuilding is Single plug, my Car is 3 plug so I was going to use my 1.1 ECU to power clocks Etc... And blank the Fueling plug off and use Carbs, it's prob about as much work as converting it to 3 plug anyways I'd of thought
  8. #8
    Quote:
    Originally Posted by Bikekid450 View Post
    I wated to put carbs on for something different, plus The Engine I am rebuilding is Single plug, my Car is 3 plug so I was going to use my 1.1 ECU to power clocks Etc... And blank the Fueling plug off and use Carbs, it's prob about as much work as converting it to 3 plug anyways I'd of thought
    And what about the fuel rail? And the other bits?

    There really is no point in doing it mate, and they dont make any carbs that go straight on the TU engines, so it would be a custom job. It's upto you but it's really not worth it tbh
  9. #9
    Quote:
    Originally Posted by Saxo_vtr View Post
    And what about the fuel rail? etc?

    There really is no point in doing it mate, and they dont make any carbs that go straight on the TU engines, so it would be a custom job. It's upto you but it's really not worth it tbh
    Well I asked the question to get help and opinians so I am listening, I was going to buy ones maybe off this Forum that are made and come off a VTR Engine, not make it up myself. But never the less would you say it is easier and cheaper to convert the Single plug Engine to 3 plug for injection or put Carbs on? I'm not bothered about power, more of a fun project. Thanks mate
  10. #10
    Quote:
    Originally Posted by Saxo_vtr View Post
    Do you know how much work would be involved to get rid of the fuel injection and replace it with carbs? All for something that is worse than standard?

    If he is going to do anything then i suggest he saves and gets throttle bodies.
    That my whole point you just interpreted it wrong mate lol
  11. #11
    Throttle bodies would be the best answer mate yes. If your planning to do it yourself you will save alot of money like most things.
  12. #12
    Quote:
    Originally Posted by DaN90 View Post
    Throttle bodies would be the best answer mate yes. If your planning to do it yourself you will save alot of money like most things.
    That is an option, I'm not 100% yet I've got to get the Engine built and stuff yet, I'm just stuck with the 3 options lol I'm not to good at Wiring looms so cutting it up and making it 3 plug would be... Fun lol but if it's cheaper I'll do that, I thought Throttle bodies were expensive, Carbs are about £300 I believe.
  13. #13
    Im not that clued up on carbs tbf matey. Does it have to be 8v or could you go 16v as there are some cheapish sets available for the 16v but yes throttle bodies are expensive but they are worth it. I wouldnt attempt to convert it if your no go at wiring lol its not a nice job. But carbs would be diffrent its just a mamouth task.
  14. #14
    You can use bike carbs with fuel injection, you just use the bike carbs as throttle bodies if you get me? Still comes to about £1000 including getting it to run right, as a standalone is virtually "required" Although it can be done with just mapping the standard ECU, but its far from best.
  15. #15
    Quote:
    Originally Posted by DaN90 View Post
    Im not that clued up on carbs tbf matey. Does it have to be 8v or could you go 16v as there are some cheapish sets available for the 16v but yes throttle bodies are expensive but they are worth it. I wouldnt attempt to convert it if your no go at wiring lol its not a nice job. But carbs would be diffrent its just a mamouth task.
    Yeh got to be 8V mate I can't get insured on 16V or I'd of bought a VTS Engine and rebuilt that with Cams Etc lol
  16. #16
    Ye thats a shame it so much more tunable. hiflow heads do a complete kit with omex 600 stand alone for 1700 but its alot of cash, and i doubt very much you would find carbs for your engine as many people throttle bodie there cars.
  17. #17
    Quote:
    Originally Posted by Saxo_vtr View Post
    You can use bike carbs with fuel injection, you just use the bike carbs as throttle bodies if you get me? Still comes to about £1000 including getting it to run right, as a standalone is virtually "required" Although it can be done with just mapping the standard ECU, but its far from best.
    Yeh I get you I've looked into that, I was kind of meaning that but I've not looked into how to go about that yet as I'm still deciding what to go for. Is useing them with Injection easier than chopping the single plug and making it 3 plug and running it as normal?
  18. #18
    well the bodies will cost around 500 area and upwards if your looking at bike bodies (i may be selling mine if your interested) and bike carbs depending where you go will cost similar price, about 350 to 550 area, i know shenpar do a bolt on bike carb kit, and bogg brothers are very good for bike carb kits too, but you will need standalone with bodies, and thats going to be 500 to 800 depending on if you go for predator or something like omex dta or emerald etc there will be other minor things like throttle cable filters just small bits that arnt a huge cost but will add up quick, but with carbs you will need 2 adjustable fpr,s the carbs, choke cable, longer throttle cable, and you can run on std ecu or run a dizzy, also depending which way you do it you wont have a rev limiter so will need an aftermarket limiter like the omex rev limiter which is 100quid i think

    if you go onto rallye register theres a large number of people that run bike carbs and all rate them highly and seem to make good power too, they will be able to give alot of good advice on them if you go towards bike carbs. but yes its seen as going back a step, but it will be fun and you will still see good gains with it and in theory it will cost less too than throttle bodies, how much im not too sure but it should do anyway
    i found one guys results on there earlier and he made 142bhp at the fly with 1.6 bottom end, s1 rallye head with ph4 cam and bike carbs which imo considering he hasnt had head work or anythink, just pocketed the pistons to suit the cam.

    but its up to you mate, i think bodies will run more efficiant and are easier to set up and might see slightly better results, but for the cost of bike carbs and for what you get it is still a good option if your looking for something thats fun and runs well'ish lol
  19. #19
    Woah ladies if you want straight forward raw power, using a carb is the best way to go.
  20. #20
    Quote:
    Originally Posted by VTRelite View Post
    Woah ladies if you want straight forward raw power, using a carb is the best way to go.
    Fuel injection is better for power? Hence why the fastest cars in the world use it and not carbs anymore

    Although Chevettes, Capri's, MK1 / MK2 Escorts and the likes are fantastic with big Webber 40s / 50s
  21. #21
    Quote:
    Originally Posted by vtr_chris90 View Post
    well the bodies will cost around 500 area and upwards if your looking at bike bodies (i may be selling mine if your interested) and bike carbs depending where you go will cost similar price, about 350 to 550 area, i know shenpar do a bolt on bike carb kit, and bogg brothers are very good for bike carb kits too, but you will need standalone with bodies, and thats going to be 500 to 800 depending on if you go for predator or something like omex dta or emerald etc there will be other minor things like throttle cable filters just small bits that arnt a huge cost but will add up quick, but with carbs you will need 2 adjustable fpr,s the carbs, choke cable, longer throttle cable, and you can run on std ecu or run a dizzy, also depending which way you do it you wont have a rev limiter so will need an aftermarket limiter like the omex rev limiter which is 100quid i think

    if you go onto rallye register theres a large number of people that run bike carbs and all rate them highly and seem to make good power too, they will be able to give alot of good advice on them if you go towards bike carbs. but yes its seen as going back a step, but it will be fun and you will still see good gains with it and in theory it will cost less too than throttle bodies, how much im not too sure but it should do anyway
    i found one guys results on there earlier and he made 142bhp at the fly with 1.6 bottom end, s1 rallye head with ph4 cam and bike carbs which imo considering he hasnt had head work or anythink, just pocketed the pistons to suit the cam.

    but its up to you mate, i think bodies will run more efficiant and are easier to set up and might see slightly better results, but for the cost of bike carbs and for what you get it is still a good option if your looking for something thats fun and runs well'ish lol
    Oo0o0 let me know if you sell yours, I may have made my mind up by then lol
  22. #22
    drop me a pm if your interested, i have alot of other stuff that will come with them too, bigger injectors longer throttle cable filters etc etc
  23. #23
    Quote:
    Originally Posted by vtr_chris90 View Post
    drop me a pm if your interested, i have alot of other stuff that will come with them too, bigger injectors longer throttle cable filters etc etc
    Will do mate cheers
  24. #24
    I'm talking outright 1000+bhp drag cars that use carbs and not injection
  25. #25
    Quote:
    Originally Posted by VTRelite View Post
    I'm talking outright 1000+bhp drag cars that use carbs and not injection
    and 2 spark plugs haha! but yeah i love carbs always have they are more mechanical and give a car more character IMO but then again injection it more reliable and can get more RELIABLE power not always more!
  26. #26
    Saxo_vtr, please step away from the keyboard...
  27. #27
    Quote:
    Originally Posted by Saxo_vtr View Post
    Fuel injection is better for power? Hence why the fastest cars in the world use it and not carbs anymore

    Although Chevettes, Capri's, MK1 / MK2 Escorts and the likes are fantastic with big Webber 40s / 50s
    Fuel injection is better for economy than carbs.

    But I reckon 4 individual carbs would be better than a single plenum for power...
  28. #28
    Quote:
    Originally Posted by titchster View Post
    Fuel injection is better for economy than carbs.

    But I reckon 4 individual carbs would be better than a single plenum for power...
    But a fuel injected engine on throttle bodies would be better again

    Quote:
    Originally Posted by Finchowned View Post
    Saxo_vtr, please step away from the keyboard...
    What do you mean by this?
  29. #29
    Quote:
    Originally Posted by Saxo_vtr View Post
    But a fuel injected engine on throttle bodies would be better again
    True, but it'd also cost more to setup, would need mapping etc.
  30. #30
    Quote:
    Originally Posted by titchster View Post
    Fuel injection is better for economy than carbs.

    But I reckon 4 individual carbs would be better than a single plenum for power...
    Yeh, I'm defenatly going to Carb now, I just need to find out how to go about it lol, Shame they can't just bolt on really
  31. #31
    Go on to rallye register quite a few people have set bike carbs up on 8v engines
    there's alot of info on there to help you out mate
    1 user thanked this post:
  32. #32
    Quote:
    Originally Posted by vtr_chris90 View Post
    Go on to rallye register quite a few people have set bike carbs up on 8v engines
    there's alot of info on there to help you out mate
    Nice one mate thanks
  33. #33
    Quote:
    Originally Posted by Saxo_vtr View Post
    What do you mean by this?
    This...

    Quote:
    Originally Posted by Saxo_vtr View Post
    You do realise carbs arn't as good as fuel injection right? So you actually making the car's performance worse.
    Quote:
    Originally Posted by Saxo_vtr View Post
    All for something that is worse than standard?
    Not entirely true.

    Good gains have been seen with bike carbs on TU lumps. Don't get bike carbs confused with a single carb from a 1.0 or something.

    Bike carbs can reap a good gain over standard if jetted and set up correctly
  34. #34
    i have twin weber 40 idf's and manifold im tempted to sell as my car is coming up for sale soon, complete with everything including the distributer cap set up etc etc?
  35. #35
    Quote:
    Originally Posted by iluminusbutterfly View Post
    i have twin weber 40 idf's and manifold im tempted to sell as my car is coming up for sale soon, complete with everything including the distributer cap set up etc etc?
    This all to fit Saxo VTR Silver top?
  36. #36
    I have seen a couple of people try and retain the original ECU and just fit bike bodies and well to be honest they were dogs. Do your self a huge favour and get your self a programmable stand alone ignition management system and get the carbs professionally set. Though carbs are not all that great. The day I got rid of my ones and upgraded to throttle bodes was a massive leap. Its also not that much more complicated to make a good fuel injection system as a good carb system. Pluss fuel injection will pass a MOT
  37. #37
    Quote:
    Originally Posted by Bikekid450 View Post
    This all to fit Saxo VTR Silver top?
    its to fit port spacing 00-00 not sure which spacing a silvertop is