Lotus Elan

Stromberg to Webber head

PostPost by: Tonyw » Wed Aug 01, 2007 1:32 pm

Hi all,

Given the cost and rarity of webber heads has anyone on the list converted their stromberg head to a webber head? is it possible. I feel it ought to be after all welding alluminium is not such a hard thing these days with TIG welders although getting the tube extensions correct would be tricky, thoughts anyone??

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PostPost by: SimonH » Wed Aug 01, 2007 1:47 pm

Tony,

These people in the USA have done it. Omnitech Engineering

They take the Stromberg head, machine of the inlet runners, drill the head and supply a bolt on Weber manifold. Here.

It looks good but possibly not much use for anyone outside the states. I did enquire and they will do one and ship it complete but wont supply just the manifold for home fitting.

What it does allow is much better porting possibilities than the normal head as you can get into the areas normally out of easy reach.

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PostPost by: CBUEB1771 » Wed Aug 01, 2007 1:47 pm

Go to http://www.cortexusa.com/omnitech/, John McCoy has been doing the conversion for some time.
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PostPost by: Tonyw » Wed Aug 01, 2007 2:20 pm

Thanks guy's,

That is interesting, pity I cannot get the piece to bolt on, still I might have a look and see what I can do here down under. Intersting comment re porting I can see how that would be much easier/better.

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PostPost by: oldokie » Wed Aug 01, 2007 4:40 pm

You might try www.lotuspbc.com He was doing conversions 30 years ago, I don't think he has much to do with the 'old' cars anymore,but it wouldn't hurt to ask.
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PostPost by: rgh0 » Thu Aug 02, 2007 9:25 am

Tony

I had two stromberg heads converted by John McCoy at Omnitech. He did an excellent job and airfreight of the heads from Melbourne to Seattle and back was not to prohibitive compared to the cost of repairing a stuffed Weber head casting or getting a new or good second hand head out of the UK

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PostPost by: Tonyw » Thu Aug 02, 2007 1:32 pm

Thanks for the replies everyone.

Funny how the same questions seem to get asked, what sort of five speed box fits, heads, seats, suspension, tyres and so on. You can spend hours going through old posts and generally there are answers to most questions as I said above most questions have been asked and answered before, what a great resource this is.

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PostPost by: Alasdair » Thu Aug 02, 2007 2:31 pm

Yes, my S4SE came with Stromberg head, I had an old scrap un-repairable Weber head, took it to a local welding wizard in Ontario who removed both intakes from both heads, installed the Weber intakes on the Stromberg head, 10 years ago!

Works great, make sure the intake carb angle is correct and I advise checking line bore for both cams after welding however.

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PostPost by: denicholls2 » Fri Aug 03, 2007 12:41 am

From what I've heard of both John's work and his prices, I seriously doubt you could do better than paying the freight to the U.S. on the heads. You don't need to ship by air, y'know.

In hundreds of posts, I have never heard of a dissatisfied customer. His work on the head goes way beyond "bolting up a new intake" and I'll opine he would not be a very intelligent businessman if he sold only the intake casting. (Picture of long line of whining, dissatisfied hacks looking to blame john for their flawed work goes here.) :cry:

A local Europa owner had his Europa Twink head done by John. With dual 45's, it turned 135 at the wheels on a conservative local dyno. This was a comfortable street engine, not full-race. A stock Stromberg in good tune would do about 100, likely less.
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PostPost by: twincamman » Fri Aug 03, 2007 1:12 am

aha -Just in from a sweaty 90 degree humid session in the garage where I melted some wires in a spectacular fashion on 0576R- [no fire department needed ]-I have waited for this ---I am planning on converting a Stromberg head [ as soon as I am finished with the europa --and can afford one ] by removing the intake portion of the runner and welding a V.W dual port webber intake manifold [ machined to match ] on to the head -- :) and placed on a 711 block to make a 'tall' twin cam -----what do we think of this ----I hope its more positive than the shape craft thread - :lol: -ed ---- BTW Alasdair-where in Ontario are you and is your europa bright yellow???ed
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PostPost by: Alasdair » Fri Aug 03, 2007 12:55 pm

My S4SE is a Yellow 1970 Elan DHC, Oakville.
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PostPost by: twincamman » Fri Aug 03, 2007 3:03 pm

well you should stop in if you come to the falls or St Kitts---ed
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