nope i am actually a genuine thickett

X2

not the best with this stuff thats why i need info

thanks for all the help so far everyone

keep it coming:D

what size carbs would i need?

and is there an issue with choke size?

thanks

aaron

that was usful, its always good to have someone break it down abit so its more understandable.

Good gear, cause so am i! Its handy to have such a forum, let us learn from the greats!

H&S

Problem is for later cars post 92 they do a fast idle check, which is where most carb setups become a little shakey. its alright with older cars because you can just run a little air leak i.e. remove the vac advance pipe from the dizzy and let it be tested at slow idle.

You may still find with bike carbs or twin 40's that a post 92 car may well fail.

With throttle bodies on the other hand you could combine them with a megasquirt ecu and program a specific 'MOT test map' which you can install the night before, running the car lean on the day. All you do is drive away after its passed and download the original tuning map and laugh. But that doesn't come cheap.

Edited 2 June, 200917 yr by RedRoller

You may still find with bike carbs or twin 40's that a post 92 car may well fail.

With throttle bodies on the other hand you could combine them with a megasquirt ecu and program a specific 'MOT test map' which you can install the night before, running the car lean on the day. All you do is drive away after its passed and download the original tuning map and laugh. But that doesn't come cheap.

With bike carbs,you simply turn the pilot jets in. So you've got your MOT setting in seconds,and that does come cheap - its free.

Or of course,you could just run it like that anyway..

il just have a tinker before MOT

so what size carbs would be the best for my car then?

thanks

28-30mm going on a per cylinder application.

Oop, that's choke size. Again, it depends on which carbs you want, bike or twin 40's.

With bike carbs,choke sizes up to 40mm,because they have flat-side air inlet chokes,so they wont be too big at lower rpm.

Still,there's no point going over 40mm because a 1.3 8v will never need that much,even at 9k rpm,as the valves and ports are smaller.

With bike carbs,choke sizes up to 40mm,because they have flat-side air inlet chokes,so they wont be too big at lower rpm.

Still,there's no point going over 40mm because a 1.3 8v will never need that much,even at 9k rpm,as the valves and ports are smaller.

Mikey, did you instal a rev limiter to yours?

H&S

Come to think of it,a 1.3 Polo has reached 175bhp on 41mm flat-slide carbs,like mine.

H&S - Mine's a Coupe-S on original ignition,the original rev counter is just fine. :)

Come to think of it,a 1.3 Polo has reached 175bhp on 41mm flat-slide carbs,like mine.

H&S - Mine's a Coupe-S on original ignition,the original rev counter is just fine. :)

175? How did they get that from it?

Yeah, i was just wondering. Someone on some forum said a rev-limiter would be helpful since these carbs increase revs

Just wondering whether they were fitted by many folks.

H&S

I'm after bike carbs really

lots if good help and info

really appreciated

so what size bike carbs would i need?

thanks

read your own thread

read your own thread

i mean like

400?

500?

600?

700?

I'm not sure

thanks

well going on what mikey says, any of them that will be completely open at 28-30mm would be most suited, but r6 carbs seems to work well on 1.3's and 1.6's aswell.

I've used CBR600 with mine and know of a few other people who have. R6 ones have also been used quite abit. Generally seems to be ones from a 600cc bike really

175? How did they get that from it?

Yeah, i was just wondering. Someone on some forum said a rev-limiter would be helpful since these carbs increase revs

Just wondering whether they were fitted by many folks.

H&S

My foot is the rev-limiter - I'm not a fan of such gadgets that do my driving responsibilities for me.

As for the 175bhp Polo,its not as unique as it sounds - it was a German MK1 race car (gold one featured in Pvw a good couple of years ago),in very high tune,and others had/have some equally high-tuned motors.

175? How did they get that from it?

Yeah, i was just wondering. Someone on some forum said a rev-limiter would be helpful since these carbs increase revs

Just wondering whether they were fitted by many folks.

H&S

My foot is the rev-limiter - I'm not a fan of such gadgets that do my driving responsibilities for me.

As for the 175bhp Polo,its not as unique as it sounds - it was a German MK1 race car (gold one featured in Pvw a good couple of years ago),in very high tune,and others had/have some equally high-tuned motors.

I know what you mean, thats why i drive an old polo, no abs, pas, tc etc. haha!

Really. how are they highly tuned? I thought there must be a finite amount of power you can get from a given engine. And i didnt think it would be 100bhp over the standard!

H&S

Expect knife-wedged crank,solid rockers,forged pistons,all steel internals,dry sump,crazy cam for 9k rpm etc etc.

right I'm going to start looking 2 find the thing i need for this so I'm just confirming this is all i need?

Electronic Ignition loom from a mk2 polo,

Carbs (28-30mm) 600cc

Suitable manifold,

Electric fuel pump and regulator.

thanks

You dont need a regulator if you feed the carbs via a T piece on the return line,but if you want to plumb it dead-end style,crack on.

My carbs,from a 600cc bike,are 36.5mm and that's fine.

Remember to get a choke cable - i got an early MK2 one,so its in its correct place in the dash,but a universal one will be fine (you can buy them from Europa or Car Builder Solutions).

You dont need a regulator if you feed the carbs via a T piece on the return line,but if you want to plumb it dead-end style,crack on.

My carbs,from a 600cc bike,are 36.5mm and that's fine.

Remember to get a choke cable - i got an early MK2 one,so its in its correct place in the dash,but a universal one will be fine (you can buy them from Europa or Car Builder Solutions).

Do you find you need to use the choke then? I know max_crox had one, but said he didnt need to use it

Also, where do you plumb the fuel line into if the T-piece from the return goes to the carbs? Wont that leave the normal fuel line 'open ended'?

H&S

Edited 3 June, 200917 yr by prankstar2003

Right. Pipe comes out of tank,into filter,into pump,then a long line back to the tank. Sorted. Nice little circulation going on there.

Now a T piece is placed on the line between the pump and the tank.

So now you've got petrol squirting out the T piece onto the floor etc,with only very little making it back to the tank.

Now connect the carbs to that T piece. The percentage diversion from carbs to tank,that balances naturally depending on how much the carbs take - because the back-pressure in the return line is enough to keep the carbs topped up (in my experience).

Id say for this though,that a high capacity fuel pump is best - the pressure still wont be much,and yet it'll give you best top-up speed when heaviest consumption is needed.

Right. Pipe comes out of tank,into filter,into pump,then a long line back to the tank. Sorted. Nice little circulation going on there.

Now a T piece is placed on the line between the pump and the tank.

So now you've got petrol squirting out the T piece onto the floor etc,with only very little making it back to the tank.

Now connect the carbs to that T piece. The percentage diversion from carbs to tank,that balances naturally depending on how much the carbs take - because the back-pressure in the return line is enough to keep the carbs topped up (in my experience).

Id say for this though,that a high capacity fuel pump is best - the pressure still wont be much,and yet it'll give you best top-up speed when heaviest consumption is needed.

Right, i tiughts that would bethe way, basically make a circular route for the fuel, then add in a T-piece. Makes sense to me

Ta for clearing it up though :-D

H&S

finally got carbs

just won these

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...em=190311963669

when they come il get a manifold made up

wher can i get electronic fuel pump and regulator from??

thanks