bike carbs v throttle bodies

jowley

jowley

Ex. Club Member
hey all ive searched around and not been able to answer the quetion running a standard engine whatt power gain would i get from running bike carbs apossed to throttle bodies and what would be the cost of throttle bodies and axuliarys to run.
 
Arent TBs ECU controlled and Carbs are just antique design which should be thrown away??

Unless twin 40s sitting on an Escort Mexico!!!
 
thanks for all the response im trying to way up power gains to cost cause a set of bike carbs is gonna set me back £200 but how much will throttle body set up set me back?
 
jowley said:
thanks for all the response im trying to way up power gains to cost cause a set of bike carbs is gonna set me back £200 but how much will throttle body set up set me back?
Click to expand...

In excess £1000, maybe £1500. A fellow member on here recently had quad tbs fitted.

You could get a low boost turbo set up for that much I reckon.
 
ollie240585 said:
Arent TBs ECU controlled and Carbs are just antique design which should be thrown away??

Unless twin 40s sitting on an Escort Mexico!!!
Click to expand...

properly set up and fueled bike carbs will out preform them webbers any day of the week, imo. and throttle bodies will do better again. just depends wot your prepared to spend.

twin 40's might be tradition, but not necesserialy the best
 
I may be wrong but you may find with carbs that the emissions will be harder to pass.

TBs are more efficient than carbs. Hence why most post 92 cars are fuel injection and not carb.
 
Jowley what kind of mechanic are you if you're not spending 1500quid (should be less being in the trade) on quad throttles and custom ECU mapping?

I question the fibre of your fabric... ;)

PS: what about the basic powerup and some suspension to use what you got, or already done that?
 
car mechanic but cant get performance at trade prices only engine work doin a race engine fuelin etc an an lowered an ajustable sus got to get yet got bout 2500 limit
building it all myself
 
jowley said:
car mechanic but cant get performance at trade prices only engine work doin a race engine fuelin etc an an lowered an ajustable sus got to get yet got bout 2500 limit
building it all myself
Click to expand...

Please try to use gramatical English WITH punctuation, so that other forum members, (we do have some overseas members), can fully understand what you are saying.

Thanks :)
 
hey work has started having complete uprated engine but unsure on what spark plugs needed any one have any ideas. its a 1.3 with forged internals all head work done 3 angled valve, port polish skimmed to highish compression, with piper ultimate cams bike carbs and a full ashley exhaust system
 
Sounds very interesting jowley, so is the majority of the engine work done? Have to get some pics up!

Surely you dont need to ask what kind of spark plugs to use lol! Id of thought any good brand like ngk would cope fine.
 
ive been advised by the parts company that the standard plug may need to be hotter running ngk bkr5e-11 at the mo just wondered which plug to go for will be starting on saturday got all the parts ordered
parts im fitting
-front camber bolt kit
-front lower and upper strut brace
-rear hd 22m antiroll bar
-weitec lowering kit by 35mm
-adjustable fuel regulator for carbs
-8.5mm performance plug leads
-piper ultimate cam kit
-ashley exhaust manifold
-custom made bike carbs
-paddle clutch kit
-complete engine work with new chain kit
and a custom bonnet vent off a imprezza with a closable flap for direct cold air feed.
will post pics as it proggresses
 
yep found that out monday when orderin parts
-front camber bolt kit
-front lower and upper strut brace
-rear hd 22m antiroll bar
-weitec lowering kit by 35mm
-adjustable fuel regulator for carbs
-8.5mm performance plug leads
-piper ultimate cam kit
-ashley exhaust manifold
-custom made bike carbs
-paddle clutch kit
-complete engine work with new
Click to expand...
 
I think the answer is yes.

The front swaybar (no upper/lower, as it is lower only) bolted to body in middle, to control arms at ends, and do that with a bush.

A strut brace (no upper/lower, as it is upper only) would connect the top mounts of the struts/uprights/shock absorbers.

Have you got the workshop manual yet? Torrent source is Italian K11, but diagrams would still help you, plus there's translate.google.com to assist further.
 
You'll need to run colder plugs not hotter ones. The stardard BKR5E-11's are too hot for a modified engine, I run BKR7E-11 and could even do with going to an 8 to get the heat range perfect.

As for the Whiteline lower brace, it attaches to the front side of the chassis points, (as in nearest to the front bumper).

Is this car for road use? as come mot time, you will have to find a solution to getting it through the emissions testing.
 
thanks for all the help motd car last week started the work will sort the plugs out tomoz thanks again for all the help
 
my friend has just had these made up and has two other sets available, let me know if you are interested.

bikecarb3.jpg


bikecarb.jpg
 
jowley said:
ive already got a set on order due int he nxt couple of weeks .well made tho look top class
Click to expand...

They are well made, they have taken ages in R&D getting the angle right for the R1 carbs to sit correctly!
If anyone is interested in one of the two sets he has let me know!
Peter
 
these are the throttle bodies fitted to my friends micra its a space frame autocross car but he is selling a smilar set up for £400, and he can also help with fitting set up, PM me if you are interested!

image135.jpg


image136.jpg


image137.jpg


image138.jpg
 
so to run carbs would you just not plug in any of the injection side of the ecu? and get the carbs setup for use with the CG13?

also, is there any way of getting a twin cat micra through an mot with carbs? (i mean its got twi cats for crying out loud..lol)
 
yeh just leaving all the manifold/ijection plugs unpluged. got to rolloning road tune the carbs. and i know the tester for the mot and if worse come to worse ill just put the origanl inlet and cats on
 
ive got the inlet an carbs already mde up will go to some srt of throttle body set up near the end of the year when the turbo set up gets under way
 
i might be being stupid here, but are those actual carbs or are they throttle bodies? arn't throttle bodies better?
 
NeX said:
i might be being stupid here, but are those actual carbs or are they throttle bodies? arn't throttle bodies better?
Click to expand...

Hi Nex, they are bike carbs but a lot of time and money has been spent it getting them correct with regards to set up these aren't your homemade set up. Yes throttle bodies are better but they cost four times as much, but the power gain we hope would be roughly the same. (Y)

Do you want a set for your cabriolet?
 
k6pfs said:
Hi Nex, they are bike carbs but a lot of time and money has been spent it getting them correct with regards to set up these aren't your homemade set up. Yes throttle bodies are better but they cost four times as much, but the power gain we hope would be roughly the same. (Y)

Do you want a set for your cabriolet?
Click to expand...

mate i would love a set, but its all money isn't it. i suppose the thing with carbs is the setting up, thats the expensive bit...

why do you need an ecu if they are all carbed up?
 
Seems that without set the gains from ITB's are hardly worth it. Interested to see it mapped though, hopefully unlock some real potential.

*setup
 
Just so you know with no AFM on the K11 ecu it has no load input and ignition will be way out from what it could be. (although connecting it to the TPS may help - if the carbs have one)

NeX said:
mate i would love a set, but its all money isn't it. i suppose the thing with carbs is the setting up, thats the expensive bit...

why do you need an ecu if they are all carbed up?
Click to expand...

Something has to control the ignition.... 3D mappable ignition is the best thing since sliced bread, yet everyone seems to ignore it.... Probably as most don't understand it at all.
 
Ed said:
Just so you know with no AFM on the K11 ecu it has no load input and ignition will be way out from what it could be. (although connecting it to the TPS may help - if the carbs have one)



Something has to control the ignition.... 3D mappable ignition is the best thing since sliced bread, yet everyone seems to ignore it.... Probably as most don't understand it at all.
Click to expand...

i think it may be that 3d mappable ignition systems are more than the price of most of the cars these things are going on..:blush:
 

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