General alky questions.

VxTurboxV · 04-13-2004, 06:51 AM

Lots of the bigblock guys useing spray bars found that they get better atomization if they spray up stream (away from the carb.) Looks like most alky kits are tapped into the uppipe and right angled tward the TB. Wouldn't it work better if I right angled it away from the TB? Am I wrong here?

Also I've heard spraying alky pre turbo will chew up your compressor blades, but only if you don't mist the water fine enough. My question is what is considered fine enough? And wouldn't water puddle up in the IC? Or at least condense? I was going to use all silicone charge piping on my car so if I could spray pre-turbo this would help me out alot.

Thanks

Steve Wood · 04-13-2004, 10:32 AM

I think the velocity in the uppipe under boost is such that it does not matter whcih way it is pointed...it is going to be atomized instantly under high boost. Facing the oncoming air will work against the pump pressure to some extent, I believe.

People that run straight alky (or higher percentages of alky vs water) seem to be concerned about the possible dangers of alky in the ic. If it does not go bang, it will corrode the aluminum.

On the spraying thru the turbo, there seems to be some debate over the years on the matter. If you use the AquaMist nozzles, it might take a very long time to eat away the compressor wheel. It has been done on sand dragsters and such in the past....

TTA 1387 · 04-13-2004, 12:18 PM

I had mine pointed toward the front of the car. Pointing away from the TB. Worked fine for me.

Mine was an older SMC kit and the instructions actually said to point it away.

Always ran 100% denatured also

Razor · 04-13-2004, 12:37 PM

Rob I think what is meant is reguarding the NOS style nozzle thats a fan tip. On those they typically point into the air since the alcohol is being sprayed not misted. Using a mist nozzle or aquamist(mist nozzle) its a non issue where and when you spray. But realize alcohol has a low flash temp.. but still has a temp. I believe its like 50 degrees. So when using alky and its really cold outside, it doesnt flash as well.

Water is much higher like 200 degrees thats why it has to be finely misted vs alcohol which isnt as critical. You mix water and alky.. then your flash point

between 50-200.. and depends on mist.

You dealing with a liquid not a gas. When you understand its not nitrous.. things will make some sense.

Back to the original NOS fan tip nozzle is pointed into the air stream not the throttle body.. becuase alcohol is being spurted out.. doing so aids in its atomization so it flashes. Kinda like pissing into a fan.. it disperses the fluid

Simple mist nozzle coupled with high pressure works tremendously

04-13-2004, 06:51 AM	#1 (permalink)
VxTurboxV Registered User Join Date: Oct 2002 Location: Wichita KS Posts: 1,724	General alky questions. Lots of the bigblock guys useing spray bars found that they get better atomization if they spray up stream (away from the carb.) Looks like most alky kits are tapped into the uppipe and right angled tward the TB. Wouldn't it work better if I right angled it away from the TB? Am I wrong here? Also I've heard spraying alky pre turbo will chew up your compressor blades, but only if you don't mist the water fine enough. My question is what is considered fine enough? And wouldn't water puddle up in the IC? Or at least condense? I was going to use all silicone charge piping on my car so if I could spray pre-turbo this would help me out alot. Thanks __________________ 86 Rx-7 GXL Hybrid 86 Grand National motor and trans. TRW pistons, Webber ported IRONS, Extender chip,Translator plus,Te-45a, Vig.Torque Conv.(3500), Trans Cooler, 55lb inj's, 10mm Race Wires, Adj. FP Regulator,RJC PP ,FMIC 18x32 spearco bar&plate, Custom 3 inch mandrel DP, postons X-over pipe. deltagate WG, 3.27 rear, WB 02 255 60 MT Progressive alky, 1 m15 nozzle. Best E.T. 10.65 Best MPH 131.4 Still tuning.

04-13-2004, 10:32 AM	#2 (permalink)
Steve Wood An American American Join Date: Sep 2000 Location: East of Eden, Texas Posts: 37,158	I think the velocity in the uppipe under boost is such that it does not matter whcih way it is pointed...it is going to be atomized instantly under high boost. Facing the oncoming air will work against the pump pressure to some extent, I believe. People that run straight alky (or higher percentages of alky vs water) seem to be concerned about the possible dangers of alky in the ic. If it does not go bang, it will corrode the aluminum. On the spraying thru the turbo, there seems to be some debate over the years on the matter. If you use the AquaMist nozzles, it might take a very long time to eat away the compressor wheel. It has been done on sand dragsters and such in the past.... __________________ ------------------ 'A government that is big enough to give you everything you want, is also big enough to take away everything you have.' - Thomas Jefferson I think one should worry more when people are lining up to get out of a country rather than into it. If they're sneaking in, we must be doing something right. The Chronicles of Zap, from the early 21st century www.vortexbuicks-etc.com

04-13-2004, 12:18 PM	#3 (permalink)
TTA 1387 Turboless Join Date: May 2001 Location: Mt. Airy, MD Posts: 52	I had mine pointed toward the front of the car. Pointing away from the TB. Worked fine for me. Mine was an older SMC kit and the instructions actually said to point it away. Always ran 100% denatured also __________________ Rob 04 IBM M6 GTO 89 TTA #1387 sold

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04-13-2004, 12:37 PM	#4 (permalink)
Razor Registered User Join Date: Jul 2003 Location: Tampa, Florida Posts: 883	Rob I think what is meant is reguarding the NOS style nozzle thats a fan tip. On those they typically point into the air since the alcohol is being sprayed not misted. Using a mist nozzle or aquamist(mist nozzle) its a non issue where and when you spray. But realize alcohol has a low flash temp.. but still has a temp. I believe its like 50 degrees. So when using alky and its really cold outside, it doesnt flash as well. Water is much higher like 200 degrees thats why it has to be finely misted vs alcohol which isnt as critical. You mix water and alky.. then your flash point between 50-200.. and depends on mist. You dealing with a liquid not a gas. When you understand its not nitrous.. things will make some sense. Back to the original NOS fan tip nozzle is pointed into the air stream not the throttle body.. becuase alcohol is being spurted out.. doing so aids in its atomization so it flashes. Kinda like pissing into a fan.. it disperses the fluid Simple mist nozzle coupled with high pressure works tremendously