CVH On Carbs

[brainbug007]

After trying to fit my engine and having some space issues with the manifold on my CVH CFi, I hoping to now get rid of the manifold and replace it with bike carbs. From what I've managed to read so far, a majority of people seem to be using some variation of zx6 carbs but are there any others worth considering which aren't too expensive? Also where have people sourced theirs from?

Some seem to come with tps and some without. I'm I read somewhere that tps is good when it comes to the megajolt. Can anyone explain what tps is as it seems to be alot more expensive? http://cgi.ebay.co.uk/ZX-636-ZX6R-03...em33669 a250a vs http://cgi.ebay.co.uk/j1-model-carbs...em1c1d4 823a9 ?

Also I think I've also read that I need a fuel pump from the same model bike as my carbs but is there anything else I need besides the carbs, pump, and a megajolt for this setup?

[mark]

Is this roadster building lark starting to keep you awake at night! questions about carbs at 3.25am

Basically when running a megajolt it will run a preset ammount of ignition advance at certain rpm this is known as running in 2d mode

With a tps the (throttle position sensor) the megajolt will know how far open the throttle is and change the advance to suit the current throttle position/rpm, this is 3d mode

Definately worth using carbs with tps

You will also need an filter and base plate

[MikeB]

Tps seems to be better than manifold pressure for megajolt.
Don't buy throttle bodies, they are not carbs they need a full fuel injection installation. I think lots of other carbs can be used.

[brainbug007]

Lol I was up early before going on holiday so how can I tell if the carbs have tps as I'm guessing the link I posted above isn't actually carbs?

[davedew]

If you open your second ebay link, and look at the second picture. The carbs are actually upside down in this picture. To the right hand side of the picture, on the end of the butterfly spindles you can see a little black item with white writing on it. This is the TPS sensor.

Most bikes from around 1998 onwards that still ran carbs will have a TPS sensor, but if buying from ebay and you are not certain just ask them the question.

Cheers

Dave

[snapper]

I run bike carbs with MAP, map reads actual manifold pressure and is in my opinion more accurate than tps, both work with bike carbs, tps probably easier to fit

[robo]

Excuse my ignorance here but is the cvh engine being refered to here the same unit that used to be in the mk3 escorts?

Bob

[mark]

Originally Posted by robo

Excuse my ignorance here but is the cvh engine being refered to here the same unit that used to be in the mk3 escorts?

Bob

The escorts used 1.6 or 1.4cvh which are different from the 1.8 found in the sierras

[davedew]

If it is a 1.6 then mk 3 & 4 escort, mk 2 & 3 fiesta. Basically xr2, xr2i, xr3, xr3i models.
If 1.8 then sierra only.

[brainbug007]

Yup its a 1.8 cvh from a sierra I've got, one of the later ones that came with an early form of fuel injection (CFi). The inlet manifold is massive and has stuff like exhaust gas recirculation which gets in the way of the chassis rails hence why I'm going down the bike carb & megajolt route to reduce space and hopefully get a bit more power out of it im guessing though you could do something similar with the smaller cvh's by using carbs from a smimilar bhp bike?