The forum has now moved, please visit us at:
HTTP://FORUM.NITROUS-ADVICE.ORG

Noswizard · Posted: Fri Jul 15, 2005 12:03 pm Post subject: Metering jets / location

25 years ago I came up with the idea of locating the metering jets at the solenoid outlet rather than at the nozzle / injector. I realised many of the advantages this gave over the method used by all others top companies (at the nozzle inlet) and I've realised even more benefits as time has gone by, so here is the latest list of advantages that locating the metering jets at the Pulsoid outlets has over locating them at the nozzle inlets;

1) The jet meters denser nitrous when located at the solenoid, which results in more "performance" from a given jet size by way of more torque and sooner in the operating cycle.

2) The initial 'hit' of the system is lean for a shorter period of time which is safer for the engine. ALL other systems 'hit hard' due to the nitrous getting to the engine much quicker than the fuel.

3) The initial 'hit' is also softer than when the metering jet is located at the nozzle. This means the vehicle as a whole is under less stress and that it can handle higher full power levels than with a 'hard hit' system.

4) With the right design of distribution block it reduces the risk of uneven distribution, jet blockage and mismatched jets.

5) On a V8 engine (for example) it can reduce the number of jets from 16 to just 2 which makes it quicker and more accurate to adjust, as well as being much cheaper.

6) When a system is pulsed the metering jet location is vital for control over the flow. Having the metering jet at the nozzle allows the pipe to act like a reservoir which neutralises the desired effect of delivering matched short bursts of fuel and nitrous.

Well that's it for now but I'm sure I've missed some so come back in a week or so and there may be a few more posted. Wink

Regards
_________________
Trev (The WIZARD of NOS)

Scalded Cat · Posted: Sun Mar 12, 2006 10:04 pm Post subject:

No 6 additional explanation:

put another way (because this is an important point), the reservoire mentioned allows nitrous into the engine when the solenoid is shut (pulsing). Therefore if you set the controller to (say) 20%, the solenoid may well be shut for 80% of the time, but the reservoire continues to let nitrous into the engine; this will increase the actual %power way above 20% - the larger the reservoire (eg thick, long, braided lines...) the higher the actual %.
So a jet in the seat will have literally no reservoire and give you 20% if you ask for 20% Wink

_________________
If the last setting didn't work - add more gas! (and check your ignition is still working ok!)

Noswizard · Posted: Sun Mar 12, 2006 10:08 pm Post subject:

Buggar, I forgot to mention that one! Red Face

Thanks for adding that Dave because you're dead right it's very important.

Regards
_________________
Trev (The WIZARD of NOS)

mr_g · Posted: Mon May 28, 2007 1:17 pm Post subject:

What about jet numbering?

If I put, lets say for example 50/25 jets. I would "see" about 25HP gain. But what about torque gain? Is it 25Nm or what?
_________________
Daewoo LaNOS Sport 2.0 16V 167HP 136WHP (opel C20XE inside) + 70WNOS
13.97s@1/4mile

RitoBrisbane · Posted: Mon May 28, 2007 9:32 pm Post subject:

mr_g · Posted: Tue May 29, 2007 8:01 am Post subject:

OK. So there is no way of knowing this without dyno?

P[HP]=T[Nm]*N[rpm]/7024

This is equatation for corelation of torque and power, related with rpm...
_________________
Daewoo LaNOS Sport 2.0 16V 167HP 136WHP (opel C20XE inside) + 70WNOS
13.97s@1/4mile

Noswizard · Posted: Tue May 29, 2007 9:52 am Post subject:

Our jet sizes are flow numbers through the jet.

The 'potential' power that can be generated from flowing nitrous and fuel at the correct pressures through the jets can ONLY BE THEORETICAL, because each engine uses nitrous in a different way due to the numerous variables that make up an engine and because of the difference in those variable btween different engines.

A dyno is the only way to determine 'exactly' how much extra power your engine makes from a given amount of nitrous and the same applies to the amount of torque increase.

Some engine will make less than the THEORETICAL amount and others will make more.

Regards
_________________
Trev (The WIZARD of NOS)

mr_g · Posted: Tue May 29, 2007 10:02 am Post subject:

Then, dyno, it is... Very Happy

Thank you...
_________________
Daewoo LaNOS Sport 2.0 16V 167HP 136WHP (opel C20XE inside) + 70WNOS
13.97s@1/4mile

Noswizard · Posted: Wed Mar 26, 2008 11:41 pm Post subject:

UP
_________________
Trev (The WIZARD of NOS)

RitoBrisbane · Posted: Thu Mar 27, 2008 1:18 am Post subject:

HuH
_________________
I AM JUST AN ORDINARY GUY

	NITROUS OXIDE ( nos / n2o ) advice forum Forum Index -> Highpower Product Facts	All times are GMT
Page 1 of 1