weber 40's or 45's

[paddy235]

my mate has a c20xe and wants to fit a set of carbs. but he isnt sure which are best for him. the car will be used as a weekend toy. just after some advise on advantages and disadvantages for each. thanks

[Adam]

40s will restrict an xe, to a point. 45s will suit better.

[philip]

40s will be ok on a standard engine. 45s if he wants to add cams or go for a wilder build later on with rods pistons etc with 240+ bhp in mind. 40s wont be large enough.

[paddy235]

He will be adding cams, arps and a manifold so would 45s be best?

[cossienova]

I'd have a word with tommy, Wilfield motors abercynon, if I were him, he's very good with xe's and he runs a 260hp one in his corsa.

[philip]

That power he'll probably say tbs. Id go 45s or 45mm tbs. 40s will be to small.

[paddy235]

He's ringing tommy in the morning. Thanks for the advise what bhp would you expect from 45s, cams and a manifold?

[blue_peg_16v]

Be a man 48s all day

[BRoadGhost]

Was going to say, if he's aiming for proper HP then consider 48's or 50's

[philip]

45mm itbs are larger chokes than 48s anyway and if were going over 240bhp id be looking at tbs over carbs anyway.

usually for a good de with fast road cams, ex mani and 45s should see 190-200bhp comfy.