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Standard Water/Methanol Injection vs W/M Port Injection

Old Mar 16, 2023 | 12:47 AM
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Default Standard Water/Methanol Injection vs W/M Port Injection

Had a thought earlier and figured id run it by the guys.

Im slowly gathering parts for my truck and was looking at a intake manifold with 16 injectors. Holley 300-624

After reading about folks thinking standard W/M injection nozzles prethrottle body had poor cylinder to cylinder distribution, figured why not just run a separate fuel system for Methanol with its own injectors and port injection.

Snow performance nozzle selection guide shows one would need a 20GPH nozzle for 1000hp/21-25psi boost.
Single 20GPH nozzle = ~135LB/HR Methanol.
Divide for 135LB/HR by 8 individual injectors that comes out to ~17LB/HR per Injector
So if one were to get the cheap 50# Flex Fuel injectors they would flow plenty of fuel and have a pretty good spray pattern. Ive tested the 50# injectors down to 15psi and their pattern is very impressive.

Think its worth a try?
Ive already got the Dominator ECU so up to 16 injectors isnt a issue. And i already have a Holley W/M injection pump and setup so i can put that on and do a comparison.


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Old Mar 16, 2023 | 09:28 AM
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Do it. Many high HP builds I read about run port injection
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Old Mar 16, 2023 | 11:26 AM
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Im trying to figure out which pump to use. Thought about pump rated for E85 and see how it does.
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Old Mar 17, 2023 | 10:13 AM
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I think Atomic did something similar in an intake spacer, he did some testing with different pumps and flow rates if I remember. Maybe he will chime in with some assistance.
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Old Mar 18, 2023 | 01:35 PM
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Originally Posted by RDF1
Had a thought earlier and figured id run it by the guys.

Im slowly gathering parts for my truck and was looking at a intake manifold with 16 injectors. Holley 300-624

After reading about folks thinking standard W/M injection nozzles prethrottle body had poor cylinder to cylinder distribution, figured why not just run a separate fuel system for Methanol with its own injectors and port injection.

Snow performance nozzle selection guide shows one would need a 20GPH nozzle for 1000hp/21-25psi boost.
Single 20GPH nozzle = ~135LB/HR Methanol.
Divide for 135LB/HR by 8 individual injectors that comes out to ~17LB/HR per Injector
So if one were to get the cheap 50# Flex Fuel injectors they would flow plenty of fuel and have a pretty good spray pattern. Ive tested the 50# injectors down to 15psi and their pattern is very impressive.

Think its worth a try?
Ive already got the Dominator ECU so up to 16 injectors isnt a issue. And i already have a Holley W/M injection pump and setup so i can put that on and do a comparison.
Parish8 (Jim) was talking about wanting to do that last year on Camaro 6 forum. Not sure if he ever did. Do it!
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Old Mar 18, 2023 | 02:52 PM
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...............................do it !
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Old Mar 18, 2023 | 10:17 PM
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Originally Posted by ZO6Ted
Parish8 (Jim) was talking about wanting to do that last year on Camaro 6 forum. Not sure if he ever did. Do it!
Oh really?
Ill have to dig that up.

Ive got most of the parts just got to finish a bunch of customers vehicles before i can work on my own.
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Old Apr 13, 2023 | 10:16 PM
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I couldn't find the post with parish talking about his W/M injection deal. I got some the cheap 50# flex fuel injectors and they all flow within 1.8% on the flow bench using mineral spirits as a test medium. Got my old FIC 80# injectors that i ran for years in my ole turbo truck and checked them to make sure they were still flowing good. Now I need to order the intake and some engine parts so I can get the L33 ready to go in the truck.
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Old Apr 18, 2023 | 12:38 AM
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Cool thing about the Dominator is i can program a few different W/M injection test.
Pre Turbo
Post Turbo
Port injection

Just need some time to get everything on the truck.
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Old Apr 20, 2023 | 07:20 PM
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You know I think Jim posted in my thread about port on my 16. It was my turbo build on Camaro 6. Like I said Idk if he ever did anything or if Choda did either...he's on here and Camaro 6. I absolutely love your posts. Wish we were close in proximity. Seem to know your stuff. I'm an AC guy for 50 years.
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