I am all for Webers on an Elan (or some other twin cam or V12 marvel), but on A series street engines, they are the wrong choice, plain and simple. They stumble, transition poorly, start with difficulty and generally seem like way more carb than these little engines need. Side draft or down draft, it makes little difference. They are a compromise. In our world, SU carbs rule.
Case in point… this is Richard’s trick little Bugeye that we picked up in Texas post ebay purchase for sorting. The car is now one of my top 10 favorites, because she has responded quite well to our multiple improvements. But we could not stop the car from a slight cough each time we exited a curve. It ran well, but nothing diminished my smile more than asking for power on an exit, and getting a slight delay.
Now, however, now that HS2 new carbs and K &N filters have been bolted on (above), this thing is pure perfection. Instant and smooth power delivery, without delay or hesitation. SUs work. Slightly bigger HS2 carbs (as shown) are even better. And if you can spring for new HS2s and air filters (available in our catalog by clicking here) like what you see above, then you have a slam dunk. And an impressive 1275 engine 0-60 time of 11.4 seconds (stock original 948 with H1 carbs was 20.5 seconds) with no hiccups.
I am absolutely certain there is someone reading this out there who disagrees, and has massaged their Weber into what they feel is the ultimate fuel/air blender, but from my experience driving more than 300 Sprites, they just flat out suck, and should be the first thing you remove from your Sprite.