Nozzle size questions etc.

DaveW · 10-21-2007

This is my first post here, so go easy. I have some questions on nozzle sizing and methanol.

I have a heads up turbo drag car, it has a 355 chevy without a intercooler and has a blowthrough carb. I estimate it to have around 1000 hp. I am wanting to install a injection system to maximize cooling of the intake charge and hopefully gain some perfomance. I always run good race gas. I think I would most likely want to use 100% methanol for max performance.

My questions are.
1 What level of performance is calulated when using the calulator?
2 Does the nozzle size change when using different ratios of methanol.

Going by the calulator it looks like I need to use 2 m15 nozzles.

Thanks
Dave

bmuu · 10-23-2007

What octane fuel are you running?

If you are running race gas already and no FNIC I think a 50/50 mix of w/m may provide you with better benifits. I would do some test passes with dirrerent mixes to see what works best.

To figure my nozzle size I took the duty cycle of my injectors and calculated it out to figure out my gph of fuel consumed at WOT. Then I took 15% of that and 25% of that and I plan to test both when I finish building my motor.

DaveW · 10-23-2007

I run 114 most of the time. I am wanting to get the most cooling from the injection more than anything, as I am not running an intercooler. I am using a carburator.

bmuu · 10-24-2007

Then you will not want to run 100% meth. Water does more for cooling than methanol.

pacemkr86 · 10-24-2007

http://www.alcohol-injection.com/for...-hemi-835.html

carbed car with about the same HP... might wanna ask him whats been working for him...

10-21-2007	#1 (permalink)
DaveW Water Injection Newb Year: 1985 Make: chevy Model: monte Join Date: Oct 2007 Posts: 2	Nozzle size questions etc. This is my first post here, so go easy. I have some questions on nozzle sizing and methanol. I have a heads up turbo drag car, it has a 355 chevy without a intercooler and has a blowthrough carb. I estimate it to have around 1000 hp. I am wanting to install a injection system to maximize cooling of the intake charge and hopefully gain some perfomance. I always run good race gas. I think I would most likely want to use 100% methanol for max performance. My questions are. 1 What level of performance is calulated when using the calulator? 2 Does the nozzle size change when using different ratios of methanol. Going by the calulator it looks like I need to use 2 m15 nozzles. Thanks Dave

10-23-2007	#2 (permalink)
bmuu Water Injection Newb Year: 1995 Make: BMW Model: M3 Join Date: Oct 2007 Posts: 7	Re: Nozzle size questions etc. What octane fuel are you running? If you are running race gas already and no FNIC I think a 50/50 mix of w/m may provide you with better benifits. I would do some test passes with dirrerent mixes to see what works best. To figure my nozzle size I took the duty cycle of my injectors and calculated it out to figure out my gph of fuel consumed at WOT. Then I took 15% of that and 25% of that and I plan to test both when I finish building my motor.

10-23-2007	#3 (permalink)
DaveW Water Injection Newb Year: 1985 Make: chevy Model: monte Join Date: Oct 2007 Posts: 2	Re: Nozzle size questions etc. I run 114 most of the time. I am wanting to get the most cooling from the injection more than anything, as I am not running an intercooler. I am using a carburator. Last edited by DaveW; 10-23-2007 at 09:58 PM.

10-24-2007	#4 (permalink)
bmuu Water Injection Newb Year: 1995 Make: BMW Model: M3 Join Date: Oct 2007 Posts: 7	Re: Nozzle size questions etc. Then you will not want to run 100% meth. Water does more for cooling than methanol.

10-24-2007	#5 (permalink)
pacemkr86 DevilsOwn Tech Year: 86 Make: Buick Model: T Type Join Date: Oct 2005 Posts: 644	Re: Nozzle size questions etc. http://www.alcohol-injection.com/for...-hemi-835.html carbed car with about the same HP... might wanna ask him whats been working for him... __________________ Phil Underwood My Turbo Buick