Do side draughts really make sutch a big diffrence on a stock 1400 motor as sum ppl say?

Plz guys help ;P

Define "side draughts" as you understand them to be.
Any method of providing a greater volume of fuel /air mixture to the cylinders, in the correct ratio, will result in increased performance.

Induction systems with a horizontal airflow manage to do away with right angle bends which are seen by many as an impediment to the airflow at high engine speeds, so as long as any side draught induction that you may use is correctly sized to your engines airflow requirements, & correctly callibrated for mixture control, then you will gain an improvement in maximum engine output.

I think your wasting your time with Side draughts (aka webers, dellortoes and Su's etc) on bog stock motor, there is not enough gain to warrant this extra fuel with no improvments to the motor.

You are best spending your moeny on the motor improvements such things as Cam, head work, extractors, some bottom end work etc...these all lead to a more improved motor in terms of Flow, HP and RPM. THen a set of side draughts would be warrented to provide the fuel, better revabilty and greater performance. You would see a marked improvement from sidedraughts on a motor that is built for them. Look at the Aseries the motors with factory side daughts were on the more improved motor SSS / GX.

I am also pretty sure that a bog stock Aseries will not even run with twin carbies, the cam is not large enough.. maybe SU's tuned down alot but not Webers, could i be wrong?

The amount of carbies and what type of carbies also depend on the motors CC's of course.

Other factors come into play with turbo and superchargers.

But dont be put off, side draught carbies are a hell of alot of fun with the right motor!!!

A well balanced motor with a stock carby is a dirty pig.
On the same engine. a couple of DCOEs will screw with your fuel economy..but make you smile.

If a factory decides that twin SUs make a difference...it's speaking volumes. A factory mod is a measurable modification...otherwise they wouldnt do it. Save 5 dollars on one car..save 5 million on their run...not something to sniff at.

Quote:

I have run twin 40's on worn out, standard A12's before and the engines have no trouble revving through to 7000 and develop more power than they did with the standard Hitachi. With regard to the A14 question I have a standard one in good condition that would fly on 40's - I know it's not optimum use of sideys but if you've got them don't think you have to rebuild your motor before you can enjoy using them.

My 2cents,
When PROPERLY set up and tuned, There will be a performance incraese on a stock motor.
What was said before about the cam not being big enough, Not exactly true. Smaller chokes, and the fact that A stock donk wont rev much past seven grand, means that they should be able to do the job fine. ( lower top revs meaning no loss from the smaller chokes)
Plus, with the A14 having the best rod:stroke ratio, cylinder filling wont be an issue.

However, getting them all set up right is kind of an art, requiring the right equipment.
just going out and buying a pair of a 150bhp race motor, and chucking them on, will lead to all manner of woe.

word on the grape vine is webber no longer make dcoe's can ayone verify this

Yes that's true no more webers.

hi there
yes I have been told this to.
DAMN I really wanted some 40mm sidedraughts in the future for a worked A15.

at 980 bucks each there was no way i was buying new webbers are they replacing them with something new