Holley Snipper
09-19-2018 | 07:24 PM
#11
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
I spoke with K&N today and their ECi doesn't seem practical for my application. As others have pointed out at $800 you're well on your way to fuel injection so why not keep going. I thought with ECI you'd tune your carb lean and let the ECI trim the fuel curve as needed to maintain AFR but that's not what K&N said. In fact they didn't recommend having it active or in service continuously, rather occasional only when the 02 sensor detected a lean condition. It doesn't have an IAC so it's not going to be very helpful if RPM is to low in gear (my problem). I like what CDShack said and I'm inclined to get my carbs calibrated accordingly and i think I'll be fine. I've had a number of carbureted that ran fine, Just not one with this much cam and this much prop but as I said I'm hopeful with the right calibration things will work out.
09-19-2018 | 07:37 PM
#12
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Joined: Jan 2003
Posts: 6,021
Likes: 1,522
From: Grand Rapids, MI
I'm taking it in steps:
Adding bigger oil coolers and heat exchangers
Fresh fuel pumps (mechanical) and 1/2 hoses all the way
Adding Weiand 177 blowers with pre-configured Holley carbs
Adding O2 sensors to Gils and AFR guages so I can see where Air to fuel ratios are on carbs.....
Then, eventually, going with the Snipers
We will see how it works out for big cruiser.
Adding bigger oil coolers and heat exchangers
Fresh fuel pumps (mechanical) and 1/2 hoses all the way
Adding Weiand 177 blowers with pre-configured Holley carbs
Adding O2 sensors to Gils and AFR guages so I can see where Air to fuel ratios are on carbs.....
Then, eventually, going with the Snipers
We will see how it works out for big cruiser.
09-21-2018 | 06:39 AM
#13
Platinum Member
Joined: Jan 2005
Posts: 1,157
Likes: 520
From: Owen Sound Ont.
I am freshening my 454's with 177 blowers, they only had 750 carbs on them when I bought the boat so I needed to buy something, I really wanted to do 1050's but a good friend talked me into injection. I am going to try the Sniper system. Should be on the dyno in the next couple of weeks. I will post results
09-28-2018 | 05:09 PM
#14
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Joined: Aug 2005
Posts: 711
Likes: 88
From: South FL
I am freshening my 454's with 177 blowers, they only had 750 carbs on them when I bought the boat so I needed to buy something, I really wanted to do 1050's but a good friend talked me into injection. I am going to try the Sniper system. Should be on the dyno in the next couple of weeks. I will post results
As posted above - I have a friend who went Sniper on marine application - might be 540s with AFRs but he loves it and he runs the boat a ton every year (hundreds of hours) - long trips NW coast. After I get mine running - going Sniper on top of my Weiand 177s baby blowers 454 Mags.
Post how your dyno goes or PM me please. Cheers and good weekend!
10-01-2018 | 01:57 PM
#15
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Joined: Jan 2005
Posts: 1,157
Likes: 520
From: Owen Sound Ont.
The heads are 188s
Hoping to be dynoing this week. If the sniper is not where we are hoping and there is time I'll try a 1000 cfm carb
I'll post results as soon as I can. I'm really looking forward to seeing how it runs
Hoping to be dynoing this week. If the sniper is not where we are hoping and there is time I'll try a 1000 cfm carb
I'll post results as soon as I can. I'm really looking forward to seeing how it runs
10-01-2018 | 04:30 PM
#16
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
Id love to see a back to back comparison if possible.
