5tox Posted December 15, 2011 Report Posted December 15, 2011 while ive got a few spare quid i was considering buying some bike carbs for a 2.0 pinto engine im basically going into this conversion completely blind so any advice is much appreciated, ive been told this is the better option than twin 45's Im looking at yamaha R1 carbs but they all have different codes, 4xv, 5jj, yzf ??? this all means nothing to me... any ideas what i need? cheers guys, Steve
oliwally Posted December 15, 2011 Report Posted December 15, 2011 You need webers. Bike carbs are too small. Look at all the real quick engines from wpe,Ashton, HPE etc and they all have webers. Bike carbs are cheaper, but people have realised and they're slowly getting exspensive. Biggest size you can get with an accelerator pump and direct pull slides. FCR carbs would be good but expensive
sgallywag Posted December 15, 2011 Report Posted December 15, 2011 use 94 r1s with a bogg bros mani connect both vacums at the top of the carbs witha t piece and leave 1 end open then go and buy a sitech regulater for 25 nook and run it at 2psi but make sure your jets are drilled at 1.6mm...then take it to a local tuner and get it set up proper otherwise it will run like a pig and will drink serious amounts of petrolium....oooooosh
5tox Posted December 15, 2011 Author Report Posted December 15, 2011 I was all up for a set of twin 45's but after a bit of research it seems as if a set of bike carbs far outweights the webers the general consensus was that they were more economical, idled and ran better, only needed setting up once (diddnt go out of balance) and they were cheaper ... all this seems too good to be true, i asked my brother who's very clued up and he said 'bollox to bike carbs, you want webber twin 45's' im confused
xrt_si Posted December 16, 2011 Report Posted December 16, 2011 This should help, it was a guide we wrote after we went and saw Bogg Brothers for a day! http://www.classicfordmag.co.uk/2011/07 ... ike-carbs/
oliwally Posted December 16, 2011 Report Posted December 16, 2011 Rubbish. When webers,dellortos,bike carbs are set up they should remain balanced. Anything mechanical like tappers and carbs need periodic adjustments. Throttle bodies also require balancing every so often. Bikes are too small. 250cc chambers verses 500cc chambers. Why do you think ford went to 44mm down draughts for the grp1 rs2000. That's the smallest they felt the pinto needed.
MK2Ed Posted December 16, 2011 Report Posted December 16, 2011 Many of the mainstream tuning places could have difficulty tuning bike carbs for max effect so also look into this before making decision
5tox Posted December 16, 2011 Author Report Posted December 16, 2011 cheers for the input fellas, oli reaises a really good point that the bike carbs are meant for an engine half the capacity
puddy Posted December 16, 2011 Report Posted December 16, 2011 cheers for the input fellas, oli reaises a really good point that the bike carbs are meant for an engine half the capacity Yeah but they still supply enough fuel/air for at least 150 bhp ,and most modern sports bikes are revving to 13/14k not 7/8k. Thats how they get the same grunt as a 2.0 from a 1.0 puddy
5tox Posted December 16, 2011 Author Report Posted December 16, 2011 ahhh i see... they are going on a pinto so wont be any more than 150bhp, i guess if i got 45's though it would give me scope for a 200bhp zetec later on
Fiesta Steve Posted December 16, 2011 Report Posted December 16, 2011 Biggest size you can get with an accelerator pump and direct pull slides. FCR carbs would be good but expensive 5tox, oli is right. One of the biggest problems with bike carbs is the lack of an accelerator pump. Bikes don't need them as they weigh nothing, a car struggles to accelerate quickly without one which is why all the quick cars have webbers, trust me, they aren't missing a trick here, lol !! Ultimately an engine with bike carbs will make the same horsepower, so on paper they look fine but they will never have the get up and go of webbers.
5tox Posted December 16, 2011 Author Report Posted December 16, 2011 cheers buddy, im decided now... its gonna be webber 45's
sgallywag Posted December 17, 2011 Report Posted December 17, 2011 webers or dellortos defo i was running bike carbs on my pinto and it wernt as good as i was hopeing i was quite disapointed with them
MK2Ed Posted December 17, 2011 Report Posted December 17, 2011 ahhh i see... they are going on a pinto so wont be any more than 150bhp, i guess if i got 45's though it would give me scope for a 200bhp zetec later on Good luck with the 200bhp N/A Zetec - you'd do as well with the Pinto...
rallyesport04 Posted December 17, 2011 Report Posted December 17, 2011 Good luck with the 200bhp N/A Zetec - you'd do as well with the Pinto... cant see that being too much effort getting near that my black top in the kit car is completely standard apart from 45's an a 4 branch an produces 175bhp
oliwally Posted December 18, 2011 Report Posted December 18, 2011 Good luck with the 200bhp N/A Zetec - you'd do as well with the Pinto... cant see that being too much effort getting near that my black top in the kit car is completely standard apart from 45's an a 4 branch an produces 175bhp Really? How's that? What rolling road/dyno? Ford couldn't manage to do that with the ST170 ,which is a country mile short of 170! My mk2 had a sliver top and was ment to be running 180bhp. It was a hillclimb car. Single seat. Light weight. Etc. was as slow as anything. Raced my mate back home in a BMW E30 cab and his tired 325i pissed over me,and I mean pissed over me. His car had 10 brake less and near half a tonne extra to carry.
5tox Posted December 18, 2011 Author Report Posted December 18, 2011 could be the driver just kidding ya! jons tiger kit car is from a guy who produces them at his garage near peterborough, i'd imagine it was rolling roaded there as he has the facility to do it thats where ill be taking mine to get it setup
5tox Posted December 18, 2011 Author Report Posted December 18, 2011 done a little bit of research and 200bhp from a zetec may be a little more involved than i first thought although it is achievable. Gotta aim high though right? maybe an XE may be a better starting point
rallyesport04 Posted December 18, 2011 Report Posted December 18, 2011 Really? How's that? What rolling road/dyno? Ford couldn't manage to do that with the ST170 ,which is a country mile short of 170! for a start a st170 isnt on webbers or a 4 branch its on its own restricted daily driver set up fitting the webbers an 4 branch lets it breathe more freely giving more power the car is a tiger R6 an was a factory built car it was rolling roaded by tiger before it started to race in the tiger series an produced 175 ponys it isnt all about bhp figures torque,gearing is also very important in accelerating quickly you could have loads of power but if the gearing is wrong it will be slow in compareson to a well geared car
MK2Ed Posted December 18, 2011 Report Posted December 18, 2011 done a little bit of research and 200bhp from a zetec may be a little more involved than i first thought although it is achievable. Gotta aim high though right? maybe an XE may be a better starting point Gotta aim high and have deep pockets mate - specially with the cost of conversion + kit after you've managed to gain the higher bhp... An XE would be a better starting point but depending on your budget you'll get a very competent bhp from a full race Pinto head, high compression, pair of 48's properly set up on 2.1 or 2.2 205 bottom end and it will bolt straight in...
MK2Ed Posted December 19, 2011 Report Posted December 19, 2011 Good luck with the 200bhp N/A Zetec - you'd do as well with the Pinto... cant see that being too much effort getting near that my black top in the kit car is completely standard apart from 45's an a 4 branch an produces 175bhp Thing is it will be an effort and the performance difference between 175 and 200hp in practice is night and day...
lee_capri Posted December 19, 2011 Report Posted December 19, 2011 You need webers. Bike carbs are too small. Look at all the real quick engines from wpe,Ashton, HPE etc and they all have webers. Bike carbs are cheaper, but people have realised and they're slowly getting exspensive. Biggest size you can get with an accelerator pump and direct pull slides. FCR carbs would be good but expensive id have to agree webers are far simpler ive got a set of bike carbs you can buy all the bits but they are a bit thecky to set up was going to run them on a zetec, you can get manerfold made on ebay think its about £130 all in then you carbs my mate colin has a set on his anglia with hot crossflow he is also doing a set on his zetec in a mk1 tina il text him to see if he will pop on has he dont come on much,he seams to do alright on them
oliwally Posted December 19, 2011 Report Posted December 19, 2011 My silver top had lightened and balanced crank. Which was knife edged. 4-1 manifold. Weber alpha and 45's with a set of rally cams and that made 180bhp. £1000 head and valve work too. Low geared as it was a hill climb car
rallyesport04 Posted December 20, 2011 Report Posted December 20, 2011 Thing is it will be an effort and the performance difference between 175 and 200hp in practice is night and day... granted 25 bhp is a fair bit to find but it is possible with the correct fueling cams an a nice exhaust i think it should be possible to be pretty close to 200bhp an a zetec isnt the most straight forward engine to fit into a rwd osf an can be quite costly to fit once all the parts are purchased but i was making a point that zetecs can make power alot of people slate them but i found them to be quite good althou i much prefer a yb. i told steve to go pinto anyway as there rwd to start with easy to fit bags of grunt easy to work on an easy to mod an lots of mods on the shelf
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