So Walter, if I am reading between the lines correctly...you´re planning on a larger engine?
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The car itself is still very drivable too. Its not scary when you step on it, so also because the handling can handle it, I think more power is possible. If I can keep it 'in tune' (and I am getting rather well at this, even if I say so myself), there is no reason it should break with more hp, although I am getting more and more surprised the alu cylinders keep up :) Another thing to consider: this (much) bigger turbo is more gentle on the engine at comparable boost then the smaller turbo was due to lesser backpressure... So more power at less stress for the engine! How can you pass up on that? :D |
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After all, the current engine was only made from left overs of the 2,7 carnage and therefore not 'all i can be'... |
Sounds good! I think the heads you have now will do just fine.Or are planning with bigger valves and welded ports,etc.? You could sell your current engine,that would give you enough money for the next build.I´m sure you would find a buyer for it.
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I don't think I want to sell the current engine as I can use lots of its parts from it and I am VERY curieus how its looks on the inside. Only if I can see what it looks like will I be able to judge how well certain solutions have worked out. But thats all in the far future due to $$ needed ;) |
I wanted more "beef" on the exhaust ports,since that is a weakspot imo.That´s why I chose the CU heads.They have a thick chamber and enough room for big valves.The square ports allow a better seal at the header.I´m also curious what your motor looks like inside,mainly the cam and lifters.The crank and rods will be fine I´m sure and should show little wear.I´m anxiuos to see what size engine you will build.
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Personally I would like to see how the pistons are wrt skirts in relation to the clearance they had and of course the head seal ;) |
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Hello Wally
I like your combination of short stroke and large bore in your engine. And it seems to be very realibly, you have realy succeeded. I have read your thread but I cant find what valve size you use in your heads? I could have missed something.... // Anders |
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Slowly but surely the new parts for the new intake and exhaust side are coming together:
http://i174.photobucket.com/albums/w...turbo003-1.jpg http://i174.photobucket.com/albums/w...erturbo004.jpg Changing the springs to CB650: http://i174.photobucket.com/albums/w...erturbo005.jpg The double Berg springs had 3 saisons on them and were VERY much down on spring pressure, so this was/is a good thing to do either way. |
Nice one Wally! Did you put rope inside the cylinder to hold the valve or did you use air pressure?
Great idea with the jubilee clips, that would made it much easier for me if I had thought of that! |
I used air pressure Paul. Killed an old compression measuring device for that a few years ago :o
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The Berg double springs were about 35% down on spring pressure :eek:
Check your springs after about 2 years of driving I'd say... Anyways, back tp building the twin scroll header: Trial fitting: http://i174.photobucket.com/albums/w...derbouw017.jpg http://i174.photobucket.com/albums/w...derbouw022.jpg |
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