What's the resultant effects of nozzle location?

C6C6CH3vo · Feb 22, 2006, 11:31 AM

Can anyone share any info on the theory of nozzle location, the effects, and ideal location in respect to TB for most power (disregarding fit and integrety).

Assume it's on a typical setup - a system about to be installed on a 300whp evo using 80 - 100% methanol with say 375ml/min @ 60psi nozzles, planning to boost to 26 psi..

Like what does moving it closer or further away from TB result in or any other stuff?

Thanks

Saikou_kun · Feb 22, 2006, 08:11 PM

I am also interested in hearing various opinions from people who have experimented with nozzle location !

SlowCar · Feb 22, 2006, 08:34 PM

60psi against ambient pressure (0 psig) = 375ml/min

60psi against 26 psig boost = ((60-26)/60)^0.5*375 = 282ml/min

You loose about ~25% of injection + atomization will suffer slightly. Why only go with 60psig pressure?

just wondering......

lexat20 · Feb 22, 2006, 08:36 PM

Quote:

Originally Posted by C6C6CH3vo

Can anyone share any info on the theory of nozzle location, the effects, and ideal location in respect to TB for most power (disregarding fit and integrety).

Assume it's on a typical setup - a system about to be installed on a 300whp evo using 80 - 100% methanol with say 375ml/min @ 60psi nozzles, planning to boost to 26 psi..

Like what does moving it closer or further away from TB result in or any other stuff?

Thanks

+2

Evoryder · Feb 22, 2006, 08:40 PM

response is better closer to TB ...i've tried further away...temps are better with nozzle closer and angled to cover more cylinders. I run 100% tried running at 50/50 and car felt weaker...depends on tune.

my 2c

AlohaEvo · Feb 23, 2006, 12:29 AM

Quote:

Originally Posted by Evoryder

angled to cover more cylinders.

how do you angle for more cylinders?

Evoryder · Feb 23, 2006, 07:43 AM

with an L bracket/nozzle...vs just having the nozzle spray down ...it sprays past the TB covering more ....

Saikou_kun · Feb 23, 2006, 09:27 AM

Quote:

Originally Posted by Evoryder

with an L bracket/nozzle...vs just having the nozzle spray down ...it sprays past the TB covering more ....

I totally agree with you about spraying WITH the air flow for getting FULL and EVEN water dispersement.

EvilBlueEvo8 · Feb 23, 2006, 11:16 AM

thats an interesting idea but i think its already been done. not positive though

AlohaEvo · Feb 23, 2006, 12:37 PM

Quote:

Originally Posted by Evoryder

with an L bracket/nozzle...vs just having the nozzle spray down ...it sprays past the TB covering more ....

nice, might have to try and get that going before saturdays tune

Evoryder · Feb 23, 2006, 03:32 PM

Quote:

Originally Posted by EvilBlueEvo8

thats an interesting idea but i think its already been done. not positive though

its' definetly been done...
...ive seen it many times...i have my nozzle welded to a hard pipe b4 my TB ...so i'd have to buy a new nozzle. This can be done DIY from parts from a Home Depot/lowes...but having something preconstructed is good...oh and make sure its stainless steel...100% meth is corrossive if using that...like muah

C6C6CH3vo · Feb 23, 2006, 03:47 PM

Makes sense with closer to TB allowing vapor to go to a gas deeper into compustion.

About how close to TB are we talking about? With it closer the chances of equal distribution to each cyl decreases.

With a 160psi shurflo, exactly what psi sits at the nozzle at max pump setting, and full power?

moto17 · Feb 23, 2006, 06:18 PM

Quote:

Originally Posted by C6C6CH3vo

Makes sense with closer to TB allowing vapor to go to a gas deeper into compustion.

About how close to TB are we talking about? With it closer the chances of equal distribution to each cyl decreases.

With a 160psi shurflo, exactly what psi sits at the nozzle at max pump setting, and full power?

is it running progreessive or on/off?

C6C6CH3vo · Feb 23, 2006, 06:24 PM

Progressive

EngineRunup · Feb 24, 2006, 01:09 PM

On the cars I have installed it on that are similar to the Evo, I have found that as long as you use small nozzles (for better atomization) and a high pressure pump, the closer to the intake the better. The computer gives full timing advance without messing with your boost levels by seeing a false low temperature by the sensor being saturated with the water/meth. Don't get me wrong, the temps are lowered for the air charge, but the water is still cooler than the surrounding air, so as it hits the sensor, the temp readings are lower than they actually are.