Agreed
I agree wholy heartedly with Iain's comments as turbo charged cars with NOS act differently to normally aspirated motors due to in main the "cooling" effect of the NOS be sprayed in at such a low temp..
On a turbo charged car is you have a 25 bhp NOS jet then you can expect aroun 47-50 bhp gain...
Also the NOS jet and Petrol jets in the actual venom injectors are different and can be properly sourced from Wizard os Nos etc i.e for 150 bhp Nitrous jet you require 60 bhp petrol jet etc...
I have "absorbed" all this NOS info from regularly attending NSCC drag meets, and drinking until we can't stand up with the drivers!!!

Very Nice bunch of people though!!
If proper used etc it is probably one of the best value for £££ power increase available for any turbo charged motors!!
Cheers
Stu