Carbs or bodies on xe???

[Rob77]

Can anyone help me out by telling me the advantages / disadvantages between fitting carbs and throttle bodies on the c20xe engine?

I am going to fit this engine, and I dont know which way to go. (bodies / carbs)

Some friends have been telling me that carbs "go out of tune" ? ? ?

Also, which would give more power, and what size carb would i need (45mm, 50mm???)

Thanks a lot!

Rob

[Jim]

Provided the carbs are set up well in the first place they should not go out of tune. I know of a few 2.0 XE's with carbs and they use 45's.

Jim

[General Baxter]

well mines got 4 big blocks of ice in the engine

dam webbers :lol:

if you change keep the injection to switch it over at winter (got to do that this week :wink: )

[MechaT]

carbs can go out of balance occasionaly. Not a big problem really. I imagine TB's would do the same.

nbaxter, your T40s ice up?! Mine haven't come close yet.

[General Baxter]

who said 40's ;)

go up 8 more :lol:

[Snowface]

you'd want to run 36/38mm chokes so Weber/dellorto 45's would do.

[j1400]

The advantage of TB's over carbs it the midrange power and torque curves are better as you can precisely map every point for fueling and ignition, also you will make slightly more power with a set of TB's because of better fuel atomisation. Also you are meant to get better "crusing" fuel economy on TB's too as you can run in closed loop using a lambda sensor. But cost wise TB's are more expensive. And the out of tune thing is old wives tails. You may find they will go out of balance but that normally cause they locking nut isn't tight enough.

[fafnova]

stuck wit same prob as your self but looking at prices s hand carbs will leave extra cash 4 rolling road some head work + cams whilst your at it the only down wit carbs is the freezing az said above and there all over inbetween idle and top speed so i got told by a freind using them ona ford

[Rob77]

you'd want to run 36/38mm chokes so Weber/dellorto 45's would do.

What is the deal with choke size?

(I know jack about carbs!!!)

Thanks all for help!

Rob

[MechaT]

40/45/48 etc. refers to the diameter of the carb barrel in mm. 40s take 28mm-34mm chokes. 45s take 34mm-40mm, or 41mm if they're Webers.
You have to choose the smallest choke that won't restrict the engine at its maximum revs.

[Rob77]

Cheers.

So what size choke / carb would be recomended on an XE engine?

(Is it possible to get a 50mm carb on?)

Rob

[Ben]

If you own BP then possibly.

[Stuart]

T50's do exist but they are mega ??? and rare and seeing as chris T has 200bhp from his T45's and hes not far off the limit without spending even more silly money i dont even think T48's will get you anymore fun lol

[srs1]

i am going for t45's with 36mm chokes on. that way the car is driver friendly as the car is going to be used daily.

[Philsutton]

^^ im going to do the same when my next student loan comes, as im gonna have to use it everyday as i seem to break all the runabout cars i have

[Rob77]

So if a larger diameter carb (eg 45mm) means you get more power, (obviously!); what difference does having a smaller or bigger choke size have?

Thanx to all for the (much needed) help!

Rob

[srs1]

as far as i know, the bigger the choke size means it will run more lumpy. drink more fuel and obviously have more power to it.

like i said, mine will be the 36mm cause it is the best of both worlds.
power and not excessive fuel consumption for every day use.