bn6
Junior Member
Once a BT-7 Owner, now a BN6 100/6 Owner
Posts: 89
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Post by bn6 on Nov 21, 2018 18:28:54 GMT
Anybody know the best place to purchase a set of triple HD6 carbs new or second hand ?
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Post by bbh on Nov 21, 2018 21:46:40 GMT
I think that you just to make a few calls to see who has the best deal. When I did it there was quite a price difference..... From my notes Burlen, Rawles Motorsport, Cape and MG Motorsport, were some of the companies I tried.
(Note in the end I went with triple HS6's from Burlen, but used some of my linkages etc from my HS4's to build up).
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bn6
Junior Member
Once a BT-7 Owner, now a BN6 100/6 Owner
Posts: 89
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Post by bn6 on Nov 22, 2018 9:39:59 GMT
On the triple carb setup is the middle carb different in anyway ?
The reason I ask I have seen some Healey triple carb setups were the rear and middle carb have the float chambers next to each other i.e rear carb chamber on the right, middle carb chamber on the left, then the front carb chamber on the right.
And other setups with all the float chambers on either the right or left of the carbs. Is everything interchangeable ?
(when viewed from the distributor side of the engine)
Apart from the technical differences of an HS or HD carb is there any performance difference between an HS6 or HD6 carb ?
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Post by frankenhealey on Nov 22, 2018 14:19:05 GMT
Theoretically you should be able to get a better deal from Burlen as AFAIK they own SU now and all the other suspects must buy from them.
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Post by healeyneil on Nov 22, 2018 22:24:00 GMT
With the HD carburettors there are just 2 types of angled float chamber effectively. For the left side of the carb or the right. They are interchangeable but sometimes choke mechanisms get in the way a bit. The HD carburettor is technically a bit better but more expensive to make. The body is slightly longer and reckoned to aid the inlet charge velocity slightly
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Post by bbh on Nov 23, 2018 20:50:36 GMT
Interestingly when I was looking at what to buy, I asked a few "professionals" their view of which was best. Ended up a pretty even split of opinion.
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bn6
Junior Member
Once a BT-7 Owner, now a BN6 100/6 Owner
Posts: 89
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Post by bn6 on Nov 24, 2018 14:01:05 GMT
Interestingly when I was looking at what to buy, I asked a few "professionals" their view of which was best. Ended up a pretty even split of opinion. Can you remember the arguments for and against the HS6 vs HD6 ?
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Post by frankenhealey on Nov 24, 2018 20:17:39 GMT
Interestingly when I was looking at what to buy, I asked a few "professionals" their view of which was best. Ended up a pretty even split of opinion. Can you remember the arguments for and against the HS6 vs HD6 ? Webers
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Post by bbh on Nov 24, 2018 21:07:21 GMT
Can you remember the arguments for and against the HS6 vs HD6 ? Webers Unfortunately I didn't write down the specifics, only the recommendation. Interestingly when you look through the Healey model evolution the factory seemed to change back and forwards. ... and yes Webers would "blow" them both away, but (and who isn't tempted) I felt would be too much for a road car.
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Post by frankenhealey on Nov 24, 2018 22:18:14 GMT
You're probably right. I've had Webers and replaced them with something more 'normal'. I really miss the Webers
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bn6
Junior Member
Once a BT-7 Owner, now a BN6 100/6 Owner
Posts: 89
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Post by bn6 on Nov 25, 2018 11:55:18 GMT
Webers Unfortunately I didn't write down the specifics, only the recommendation. Interestingly when you look through the Healey model evolution the factory seemed to change back and forwards. ... and yes Webers would "blow" them both away, but (and who isn't tempted) I felt would be too much for a road car. Webers had crossed my mind as well but as you say if you wanted the best out of the engine you would end up with not a very practical road car. I have gone for the DWR8 cam with valve pockets, balanced crank line and lightened flywheel, for the period look correct RHD Ruddspeed manifolds with triple carb setup, DWR tubular exhaust. Once I have recovered financially I am hoping for a DWR fast road alloy head
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Post by bbh on Dec 17, 2018 21:56:58 GMT
To "go off" on a tangent here, just had a look at the video posting from Joe Curto, describing some of the differences between the SU family of carbs ....
.. and for those with an early Healey with "H" type a useful video on changing the shafts and bushings ....
... and for those with the later "HD" carbs, how to change the nylon / PTFE bushings ...
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Post by dougie on Dec 18, 2018 4:24:44 GMT
Unfortunately I didn't write down the specifics, only the recommendation. Interestingly when you look through the Healey model evolution the factory seemed to change back and forwards. ... and yes Webers would "blow" them both away, but (and who isn't tempted) I felt would be too much for a road car. Webers had crossed my mind as well but as you say if you wanted the best out of the engine you would end up with not a very practical road car. I have gone for the DWR8 cam with valve pockets, balanced crank line and lightened flywheel, for the period look correct RHD Ruddspeed manifolds with triple carb setup, DWR tubular exhaust. Once I have recovered financially I am hoping for a DWR fast road alloy head You mean something like this.....
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bn6
Junior Member
Once a BT-7 Owner, now a BN6 100/6 Owner
Posts: 89
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Post by bn6 on Dec 18, 2018 11:16:51 GMT
Yep, except my Ruddspeed manifolds and rocker cover are the same as these for the right hand drive car and I will use triple HD6 instead of triple HD8 carbs.
It should look like like this once finished.
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Post by bbh on Dec 18, 2018 19:51:54 GMT
from a different angle .....
Looks good, although that copper water pipe does stick out a bit, personally I would have done it in stainless.
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