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Single carb Okrasa?
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Slow 1200
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PostPosted: Sat Jun 22, 2013 1:47 pm    Post subject: Single carb Okrasa? Reply with quote

Browsing an old book theres a picture of an old Okrasa ad which shows dual port heads with a very funky looking single carb manifold
When did they sell those? Did they offer single and dual carb kits at the same time or was it a very early thing?
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henry roberts
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PostPosted: Sat Jun 22, 2013 4:07 pm    Post subject: Reply with quote

i think the single carb was generally for aircraft applications.
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Slow 1200
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PostPosted: Mon Jun 24, 2013 10:59 am    Post subject: Reply with quote

here it is Very Happy

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Fishynos72
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PostPosted: Mon Jun 24, 2013 3:23 pm    Post subject: Reply with quote

that's an awesome looking manifold, do any examples survive?
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txoval
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PostPosted: Mon Jun 24, 2013 5:24 pm    Post subject: Reply with quote

From what I've heard, but can't confirm is that Speedwell is working on these manifolds...

Would be great if true
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tobiasax
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PostPosted: Sat Apr 02, 2016 5:12 pm    Post subject: Re: Single carb Okrasa? Reply with quote

Any proof that this manifold was ever sold to the public?

I have seen this brochure and a review in AM&S, but have never seen a survivong manifold, or a picture of a complete engine installed in a car.

(Okrasa also had larger Nicasil cylinders in their brochures that I strongly suspect were only "paper ware")
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GTV
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PostPosted: Sat Apr 02, 2016 5:45 pm    Post subject: Re: Single carb Okrasa? Reply with quote

I remember seeing an EMPI Sportster many years ago with a 40hp Okrasa breathing through a single carb.
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Rome
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PostPosted: Sun Apr 03, 2016 6:35 am    Post subject: Re: Single carb Okrasa? Reply with quote

Paragraph above the power graph generally reads "special manifold combining greater elasticity with more power, when keeping the normal carburetor with different jetting".

Could be compared to the 1600 single-port engine rated at 57hp to the 1600 dual-port in '71 (though with a larger carb) rated at 60hp. So with the OKRASA, instead of the stock 36hp, maybe 38-39hp? Whoopee. Remember that the graph shows the Euro hp rating; a stock 36hp US SAE rating was 30hp DIN.
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