Right ho, I think I've worked it out.
Although, on the face of it (to me at least), locating the nitrous feed line in the coolest spot (underneath the car) would seem preferable to routing it inside the relatively hot car, it is wrong for the following reasons.
It's all to do with RELATIVE temp. difference.
Underneath the car, the feed line is sitting in MOVING air at say 15 deg C
Inside the car, the line is sitting in NON-MOVING air and in-between (therefore insulated by) carpet and sound deadening material at say 25 deg C
So, with the first blast of Nitrous, the line under the car will give the best performance.
BUT after the initial burst of nitrous or purge, the line cools down to a very low temperature.
After a couple of shots, the line inside the car that started out in the warm will have cooled its environment down to the same very low temperature and further shots will benefit from this, improving commensurately.
On the other hand, the line underneath the car is being fed by a fast moving current of air and will always be sitting in an ambient temp of 15 deg C. Therefore every shot will be starting with the same conditions as the first. Therefore no improvement.
It is the insulation that is the key here exactly as Trevor suggested. But not so much to protect it from possible heat sources, more to maintain the cold temperature the nitrous produces and to stop it from radiating away.
Trever, let me know if I'm on the right track, Cheers
To prove the hypothesis above, todays experiment: To measure the temp of the feed line itself in two positions. 1. Inside the car where it's insulated but starts out warm. 2. Underneath the car in moving air where it start out colder.
We'll then see which position attains the lowest temperature and maintains it the longest.
PS. Once I've got some suitable insulation I will be applying it to my line underneath the car, between the under tray and floor pan. That way my starting temp will be lower than an internal line.
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