ok so me and rick were at the dyno today!
Story time.
arrived high spirited, would be happy with stock power (170) and stock + 50 for nitrous.
first run, brings it up and boots it to the wonderful figure of 141bhp. to the words from dunc "thats fucking shite!"
second run, boots it and lets it chirp off the limiter and reads 145bhp. still. not. good.
third run, up to 3k, hits the gas switch and the power flies up to 180bhp with a distinctive buzzing noise from the exhaust... DET. fuck.
fourth run i brought the timing back to 15* and done a run without gas, 161hp. so for some reason retarding the timing in this case gained power. thats really quite odd!
fifth run, nitrous brought in at 4250rpm, instant spike up at that point on the graph from 100hp to 155hp and continued climbing all the way to 198hp. with a maximum torque figure of around 190ft.lbs.
sixth and final run, brough the nitrous in earlier to give it a little more time to overcome lag and revved up to 6500 before that buzzing noise came back with a vengence. more det. netting 191hp
the next 20 minutes were spent discussing where to go from here. im advised to tighten up my plug gaps from 0.9 to about 0.7-0.6mm to give a better spark. where det presented itself the AFR reading was around 10:1. VERY rich, which dunc reckons is a result of the overfuelling quenching the plug.
Videos:
Listen for det :
[video=youtube;UoozooDXSpo]http://www.youtube.com/watch?v=UoozooDXSpo[/video]
No Nitrous :
[video=youtube;Zl8ulVY_X8w]http://www.youtube.com/watch?v=Zl8ulVY_X8w[/video]
Nitrous :
[video=youtube;3_ULTtkeUfw]http://www.youtube.com/watch?v=3_ULTtkeUfw[/video]
last one to try break the 200's. DET
[video=youtube;xOxWMDNqdzc]http://www.youtube.com/watch?v=xOxWMDNqdzc[/video]
Graphs:
Power:
AFR:
note he only revs to 7k with nitrous.