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skiron

Competition needle valves 225 and rolling roads

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Hello everyone on here, this is my first post and wont be my last going by the number of issues i am having with my recently purchased Lotus Esprit

I had fuel pouring out of the four inlets on my engine, i have set the float heights as per instruction on here. I also thought it prudent to change the needle valves.

When i removed the old needle valves i see they are 225 competition type instead of the standard 200 as stated in the book.   I have fitted brand new viton tipped 200 needle valves and 10 gram floats and all is well again.

What i want to know is will there be a significant difference between the two needle valves with regard to performance ??????

The engine was rebuilt by the previous owner and looking at the images and previous rolling road results it was producing 210 hp which is quite impressive for a NA car.  

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Sounds like the previous owner didnt set the fuel pressure correctly. Its essential you check this. Its probably too high.

The needle valves dont affect performance.

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10 minutes ago, Andyww said:

Sounds like the previous owner didnt set the fuel pressure correctly. Its essential you check this. Its probably too high.

The needle valves dont affect performance.

NA motors don't have pressurised fuel delivery, only turbo motors do.

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5 minutes ago, jonwat said:

NA motors don't have pressurised fuel delivery, only turbo motors do.

Oops yes missed the "NA".

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The needle valve numbers refer to flow rates, the higher numbers mean higher flow rates. You can go higher, but not lower.

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