5 replies to this topic

[tihok]

Hi , could you help me. I have rover mini 998 with stage 1 kit from minisport.
My original carb HS4 is broken, so I got a weber from ebay, but insted of DCOE 40, the gyus send me DCOE 45.
Is there a point to bother to install it. I know that its a way bigger for my engine, but my current carb works very poor.
Also I don't have the linkage kit.

[benpopham]

Will be too much for a standard'ish 1000cc, stick it back on ebay

[GreenMini17]

I have a 40 dcoe on my 998, and it works fine once it is set up properly. I am unsure whether a 45 dcoe would do the same though. Have you got a manifold aswell? Because that and a linkage kit could set you back £150 easily.

Could you not sell the 45 on ebay and then buy a 40 or twin hs4's? The weber is a far superior carb though, and it sounds awesome!

[TopCatCustom]

People always ******* off the old SU's but they are good carbs! Atomisation is better than fixed choke carbs like webers, as the venturi gets smaller with lower air flow, keeping velocity up, which is good for economy and part throttle torque. People also make good power with them!

*saying that- I'm going to be looking for a weber for my current project! Only because I want every drop of power and not concerned at all about fuel economy, my current car gets 10mpg so it cant be worse!

edit- wow this anti abuse filter is sensitive! I'm sure to "s1ag off" only comes from the smelting industry where they get rid of the s1ag

Edited by C4NN0N, 28 October 2010 - 04:02 PM.

[Ivor Badger]

you could put 34 chokes in it Iirc, the smallest available and then jet it from there. Flow rate might be a bit low around butterfly for slow run jets, but I know people who run 2 45s on 1600 Elans for hillclimbs.

[Cooperman]

A 45 DCOE, whilst far too big for a 998, will make an excellent price on ebay. For a 998 an HIF44 or HS6 is great if you have a head and cam with the ability to 'breath' the volume of mixture such carbs will flow. I built a 1061 cc Mayfair (that's +0.080" on the bore) which had an HS4 together with a 'soft' 510 Cooper 'S' cam, 12G295 head with larger inlet valves, 10.3:1 CR, 3-into-1 ex. manifold, 1.625" bore exhaust into an RC40 box, and Howley alloy inlet, all nicely matched and gas-flowed and it gave 66 bhp at 6000 rpm. Also, it was just so nice to drive on the road, was economical and cruising at around 75 to 80 was much smoother than a 1275 at the same speed.
I thought of fitting twin HS2 carbs, but it went so well I couldn't see the point. It was low-cost to build and a very nice engine.
SU carbs are still good on a Mini and, IMHO, you only gain with a Weber at large engine sizes, hot cams and very high revs, like over 6500 rpm sustained.