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Ruddspeed carbs
- Thread starter Cooperman
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You should look at this John Bolster test of a Ruddspeed modified Healey: https://healey6.com/Technical/ruddspeed.pdf In combination with a modified head and camshaft, the Ruddspeed carbs made quite an improvement (and if a decent header was added would have been even better). But like all engine mods, it's the combination that makes the difference. You would not likely see an improvement in adding these carbs to a stock motor if it was already under-carbed, which your car probably is not. Nevertheless, if you want to run them you could probably do so by using some weaker needles and be ok. The cool factor when you open the bonnet is probably worth it. If they were mine, I'd seriously consider doing the rest of the mods like the Bolster car, that would be very interesting. If not, they are a prized piece of Healey kit that someone would pay dearly for.
Thank you Healey Rick, that's a very interesting article, identical carb set up. Looks like I'll have to keep my eyes open for a mod'd head..... They look great on that car. Its a bit difficult to see but it looks like they have no heat shield fitted on that car. My carbs do not have one either which I guess would cause issue.
dougie
Luke Skywalker
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That's a great find, I suggest you have the carbs rebuilt and use a BJ8 cam grind, with a little head porting you'll gain some good performance.
I run triple 2" SU HD8's with a Ruddspeed manifold on my '57 100-6 MM vintage racer which produces plenty of performance. I designed and fabricated my own heat shield to look factory original and my motor is totally ungraded for vintage racing, dyno (rolling road) tuned for total output. I love the look of the SU's on the Ruddspeed even though Webers will provide a little more HP.
I run triple 2" SU HD8's with a Ruddspeed manifold on my '57 100-6 MM vintage racer which produces plenty of performance. I designed and fabricated my own heat shield to look factory original and my motor is totally ungraded for vintage racing, dyno (rolling road) tuned for total output. I love the look of the SU's on the Ruddspeed even though Webers will provide a little more HP.
Randy Forbes
Yoda
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These pics show up brighter, taken a little more than three decades ago (>30 years) at a Healey event held at Cypress Gardens, Florida. It's possible that Reid may have some details about the car, as I only recall it being a BN7, but he was a member of the host club at the time (maybe still is?).
Notice that these are a different pattern, with the balance conduit on the top surface.
The car sporting them was shown pre-restoration, but it was however, driven to the event! BTW, that's my BN6L/942 in the center-background (with primer around the freshly installed fender vents).
I did take away a couple of momentos though (the trophies were awarded June 6, 1985, the picture of them being more recent)
Please forgive the pictures being larger than I typically post, but I thought the greater detail around the #1 carb would be appreciated, and if you're going to do one...
Notice that these are a different pattern, with the balance conduit on the top surface.
The car sporting them was shown pre-restoration, but it was however, driven to the event! BTW, that's my BN6L/942 in the center-background (with primer around the freshly installed fender vents).
I did take away a couple of momentos though (the trophies were awarded June 6, 1985, the picture of them being more recent)
Please forgive the pictures being larger than I typically post, but I thought the greater detail around the #1 carb would be appreciated, and if you're going to do one...
Healey Nut
Luke Skywalker
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Whats with the the funky cap on the brake/clutch reservoir in Randys pic ?
dougie
Luke Skywalker
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There must have been 2 types of period casting of the Ruddspeed manifold, mine looks like Randy's example which will accomadate a hi-performance free-flowing header design. The other with the lower integral balance pipes as see here on the 1960, former Bill Bolton owned Canadian Championship winning 3000 # 171.
D
Deleted member 19315
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After I'm back on the road a triple su set up like this is my next change . I already have a pair od 2 inch SU's so one more and a manifold seems doable. Currently I have standard cast iron exhaust manifolds coupled to a DW side pipe. I have a DW alloy head and an unknown cam but hhe build was by Rawles Motorsport and is describedcas fast road. Are the tubular manifolds much better than the cast ones which look relatively free of awkward shape or constriction. ?
Randy Forbes
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C'mon, you've got to be old enough to recognize that; it's the cap off one of those old, round-flat gas cans. You'd remove the whole cap to refill the can at a station's pump, and just loosen the small cap on top to vent when pouring the gas out, using the snorkel screwed onto the opposite side-top of the tank.
Probably put it on there A) because it fit, and B) to have a cap large enough to actually get a purchase on.
Healey Nut
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way before my time Randy
DerekJ
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Hassad,
Yes the tubular manifolds are much better than the original, especially so as you have a an alloy head and hotter cam. You might get an extra 6-8 bhp. The downside, if I can call it that, is that you will experience more resonance and also lose that lovely change in exhaust sound that standard Healeys have around 2500-3000 revs.
Yes the tubular manifolds are much better than the original, especially so as you have a an alloy head and hotter cam. You might get an extra 6-8 bhp. The downside, if I can call it that, is that you will experience more resonance and also lose that lovely change in exhaust sound that standard Healeys have around 2500-3000 revs.
D
Deleted member 19315
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Thanks Derek.
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I have tube headers ceramic (jet-hot) coated inside and out. That process gets rid of the typical tinny sound of headers as well as the engine compartment heat. Not sure if it's identical to the cast-iron manifolds, but it's not too different.
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I believe those shown are the ones for the RH drive cars. There were LH and RH drive manifolds.
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