Bike Carbs or Twin 45's on a pinto?

[Mk2Jo]

For and against please

[Posse]

deffo cheaper than 45's and more reliability

[Mk2Jo]

Well, that is what I thought and that is why I was considering it, however, I have been told you can't get big power from bike carbs which has put me off doing it myself

[bomber1]

Well, that is what I thought and that is why I was considering it, however, I have been told you can't get big power from bike carbs which has put me off doing it myself

 

dont think thats right havent done it myself but everyone that does do it raves about em get'em on there

[Baz.]

carbs jo, every time

[Fiesta Steve]

Bike carbs are generally small, thats because they are designed for 1 litre engines.

 

and I'm yet to see a some good results fron these cars on the rollers or any quick 1/4 mile times.

 

All the quick cars are on Webers, and not without reason. Minumim of 45's on a Pinto i'd say.

 

 

The plus side of bike carbs is they are cheap and the engine should remain driveable.

[ExotronGammaPlusSequencer]

My reasons for bike carbs are

 

1. For the budget i had to put the car on the road they were much better value

2. Came refurbished so i knew they would be in good shape

3. They fitted in with the build of my 100e,i wanted something a bit trick looking under the bonnet

4. Id heard they were gave better driveability(which they have in my experience)

5. They only need an electric pump from a bike (or even the standard mechanical pump)so no pissing about with pressure regulators,which means a tidier install & even less expense

6.They look better than the twin choke that i had before!

 

Ive had plenty of lairy crossflows/pinto's etc on carbs, most needed fiddling with & were a pain in the arse in traffic,my bike carbs have been sweet even on the way back from the ace when the car overheated & the engine got RED HOT.

I will admit my 100e only has a standard pinto but it was built to be driveable-which it is.I see no reason why they wouldnt be suitable for a fast road engine,there are plenty of modified kit cars running them.Ratters on this site has them on a modified crossflow,maybe he can give us his view.

 

Admittidley if i built another mk1 or a cortina id probably go with DCOE's/DHLA's as they are more in keeping with the old skool thing,ultimateley its up to you.....

[viv-ashton]

Webers Jo!!!!!!

[jayson2.3pinto]

well ,jo bike carbs are good but webers are better for power 45 would run sweet on pintos

[Tigran]

Bike carbs are generally small, thats because they are designed for 1 litre engines.

 

and I'm yet to see a some good results fron these cars on the rollers or any quick 1/4 mile times.

 

All the quick cars are on Webers, and not without reason. Minumim of 45's on a Pinto i'd say.

 

 

The plus side of bike carbs is they are cheap and the engine should remain driveable.

 

With the 1 litre they make as much as a hot pinto.

 

The whole 'all the others have em' mentality is surely not a good reason to do it. It was used as an argument against the mid engined cooper climax and look what the whole F1/single seater field is doing now...

 

Bike carbs from what i've heard...which is why i'm ordering a pinto inlet to link up some R1 jobbies onto it - more than beefy enough!

[Vista]

well ,jo bike carbs are good but webers are better for power 45 would run sweat on pintos

 

run sweat ? phew that could get smelly

 

Seriously though, Webers get my vote, they sound great go great and providing they're well set up don't give any trouble. Mine run just fine whether I'm caning it or pootling through town. I used the car as a daily driver all summer without so much as a hiccup.

[Capri_Steve]

I had the same dilema when choosing for my pinto. Went for 40's instead of bike carbs. Know a few people trying this and it seems a pain in the arse to actually get it running properly. You can't beat webers, they were designed for fast CAR engines.

[Morley]

What about a Nikki carb??

[Baz.]

well ,jo bike carbs are good but webers are better for power 45 would run sweat on pintos

 

Sweat, do you mean sweet?

[Mk2Jo]

I knew what you meant Jase

[Fiesta Steve]

Bike carbs are generally small, thats because they are designed for 1 litre engines.

 

and I'm yet to see a some good results fron these cars on the rollers or any quick 1/4 mile times.

 

All the quick cars are on Webers, and not without reason. Minumim of 45's on a Pinto i'd say.

 

 

The plus side of bike carbs is they are cheap and the engine should remain driveable.

 

With the 1 litre they make as much as a hot pinto.

 

The whole 'all the others have em' mentality is surely not a good reason to do it. It was used as an argument against the mid engined cooper climax and look what the whole F1/single seater field is doing now...

 

Bike carbs from what i've heard...which is why i'm ordering a pinto inlet to link up some R1 jobbies onto it - more than beefy enough!

 

 

A 1 litre bike engine makes the amount of power it has because its carbs/chokes are matched to the size of the inlet ports, the valves, and the amount of air that the head can flow.

 

The big valves in a pinto need big choke sizes to make the horsepower (assuming you fit them for more power), big chokes mean big carbs.

 

So your saying small carbs will be better right ? Because a bike has the same horsepower as a hot pinto and is only 1 litre

[Tigran]

All I was saying is that if they can flow enough air for the power they make on R1's and the likes it stands to reason that they would cope with a fast road pinto.

 

Zetecs run a doosey with them so I can't see why pinto's wouldn't.

 

It would be awesome to somehow test them back to back on identical engines - perhaps something cf/rf could do in a tech feature?

 

**Edit** typos ahoy!

[ExotronGammaPlusSequencer]

Know a few people trying this and it seems a pain in the arse to actually get it running properly.

 

They shouldnt be any more trouble than setting up a secondhand set of webers Unless you are trying to run them with the standard jets still in them?Apart from a faulty fuel pump mine bolted up & have run sweet ever since.

 

As for the magazine feature i had an old copy of fast car or CCC from the early 90's where HT did a comparison between bike carbs(mikuni's) & webers.The bike carbs lost a few BHP low down but gained it higher up the rev range & they said they were better mannered.

 

That is from memory though so i could be talking complete the round ones....

[Fiesta Steve]

All I was saying is that if they can flow enough air for the power they make on R1's and the likes it stads to reason that they would cope with a fast road pinto.

 

Zetecs run a doosey with them so I can't see why pinto's wouldn't.

 

It would be awesome to somehow test the to back on identical engines - perhaps something cf/rf could do in a tech feature?

 

A 2.1 Pinto at 8000 rpm consumes more air than a

 

1 litre bike engine at 12,000 rpm.

 

Thats why they need bigger carbs

 

Do the maths !! Then tell me i'm wrong. Please don't just guess.

 

 

I totally agree with the magazine feature thats a good idea m8 . That way people can see for themselves.

[jayson2.3pinto]

they put harley davidson on weber carbs but just because you put bike carbs or webers on an engine its all the other factors that make it work but its what you want yourself, i do like the look off bike carbs but probably because i have webers , and i seem to like things that some one else has

[Rich Sav]

do u recon the R1 bike carbs will work on a 1.1 fiesta??????

[Tigran]

Having done a bit of basic maths (alright ok someone helped me). The 2.1 @ 7000 (8k is a bit extreme isn't it?) and even using the correct 12,500 at which the power is delivered on an R1 still means that the 2.1 is consuming ~7350 litres per minute compared to the rather puny 6250 of the R1.

 

Damnit! Still being a stubborn young male i think i'm a gonna find out if they work first hand.

[Onyx Dave]

Dont you think that us Hot Rod boys would be using bike carbs if they where better than Webbers!

[marky4]

i don't know which are best but talking to few peeps who have R1 carbs they say they are great smooth throughout the rev range and a third of the cost of 45's so if on a budget a great alternative

 

apparantly there are places that set them / jet them to suit your engine spec

 

personally i will stick to my 45's

[Mk2Jo]

Bogg Brothers are the boys to sort out the bike carbs so I understand.

 

http://www.boggbros.co.uk/