Yes I totally agree, and in fact, this was my original plan (shown on the earlier pages of the write up on the wizards forum)...but before I rehash the fuel system, I reaaly want to see of the stock pump can do the job...
A few people on here have ran up to around 80bhp on the stock pump...
. my biggest worry about the stock pump is "its pulsing mechanical operation" (ie the pressure is modulated and since the pressure is low anyway, this modulation may be large enough to swing the nitrous mixture all the way through 'too rich'<bogging down> and 'lean'<pop> (EEK!!))
anyway, I think I've sobred up now (from last nights tennants superstrength fest) so I'm goanna check the sparks are still as strong as they were a few months ago and check some other stuff too...maybe try to do an audio recording of the static test..
<EDIT: later on after some tests.....>
DRAT!!
I've just changed my email address on the wizards forum and I cant post untill I get the confirmation email link through (what an idiot!)
Ok so I'll post the link to the sound recording here first and then catch up with the main writeup when I get let back in
So following on from
http://www.technical-forum.com/nitrous-advice-forum/nossan-k10-micra-won-litre-t2799,start,75.html
First of all I rechecked the sparks using a spark strength tester that I bought from Fusion Motorsport and all leads gave a strong blue spark with the calipers extended to the end stop with no misses....One thing I did notice though was with a small gap in the calipers the spark grew fatter and oranger
...Im gonna look into this on thenet (any ideas anyone)
Back to business....
Idid this with a £2.99 pc microphone & laptop, heres a commentary on the recording....
There were 3 activations (3 tests) during this recording while trying to keep everythin else the same...then a normal revup for comparrison
9.0s to 14.0s : trying to find & hold 2000 rpm (system not activated)
16.5s to 19.0s : NITROUS ACTIVATED and held on while throttle position held steady
19.0s to 27.5s : trying to find & hold 2000 rpm (system not activated)
27.5s to 29.5s : NITROUS ACTIVATED and held on while throttle position held steady
29.5s to 45.0s: trying to find & hold 2000 rpm (system not activated)
45.0s to 46.5s : NITROUS ACTIVATED and held on while throttle position held steady
46.5s to 55.0s: wondering if this was recording properly (system not activated)
55.0s to 60.0s: normal rev up to around 4500rpm ish (system not activated)
Heres the link:
http://www.roadar-northeast.co.uk/K10/statictest.mp3
<EDIT: after digging around some more>
Ive found a couple of references that indicate that orange sparks are OK...so are blue ones
http://iaa.umd.edu/walls/INAG207/Ignition/Ignitionsteps.html
http://www.briggsandstratton.com/display/router.asp?DocID=67479