Supra comp convertion to EFI

[Stacy]

Has anyone converted there 351 carb to some type of EFI. I seen some kits online that looked like they might work. I was just wondering if anyone has experience with this process. I am hoping to convert my boat to EFI sometime this summer.

https://www.holley.com/products/marine_and_powersports/marine/sniper_efi_marine/sniper_efi_4150_marine/parts/550-872K

https://www.holley.com/products/marine_and_powersports/marine/sniper_efi_marine/sniper_efi_4150_marine/parts/550-511

https://www.jegs.com/i/FAST/244/30227-06KIT/10002/-1

[michael hunter]

What year and model boat do you have. Why do you want to convert it?

[Stacy]

It's a 1995. To be honest I prefer efi that's the main reason for the switch. There is a decent variation in the lake altitudes we go to during the summer any where from 1500ft to 6000ft. I don't have any issue with the carb, but I like the ease of efi. I am just curious if anyone has actually done it and if so do they have a recommended kit that works well. I have been considering the holly kit for my conversion this summer.

[Stringcheese]

It's a 1995. To be honest I prefer efi that's the main reason for the switch. There is a decent variation in the lake altitudes we go to during the summer any where from 1500ft to 6000ft. I don't have any issue with the carb, but I like the ease of efi. I am just curious if anyone has actually done it and if so do they have a recommended kit that works well. I have been considering the holly kit for my conversion this summer.I'm doing the same. I hear there is no place to put the O2 sensor needed for tuning. Following...watch my post too.

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[secondsupra2004]

I'm doing the same. I hear there is no place to put the O2 sensor needed for tuning. Following...watch my post too.

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There is a thread in the Moomba forum and they said they installed the Holley Sniper setup on an older SkiRay. Said it worked good for him. I asked him how he was able to calibrate without the O2 sensor. He hasn't replied back yet.

[Stringcheese]

There is a thread in the Moomba forum and they said they installed the Holley Sniper setup on an older SkiRay. Said it worked good for him. I asked him how he was able to calibrate without the O2 sensor. He hasn't replied back yet.Okay, thanks. I'll check it out in a bit.

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[Hagman]

I used the fast EFI Retro kit. Runs the best ever. Going on the 4 years.19338

[Hagman]

This is how i installed the O2 censer19339.

[secondsupra2004]

This is how i installed the O2 censer19339.

Makes sense. I read on a few other sites where people have had problems with adding O2 sensors and having the sensor fail due to steam/moisture rising up to the sensor after the engine shuts off. Good to know you've had (4) years service with no problems.

[Stacy]

Thank you guys for the information and sorry I have not been on in a while to reply. On that O2 sensor, did you just drill and tap it or did you make a spacer that is drilled and tapped?

[Hagman]

The manufactures name is on the side of the O2 spacer. I think he is out in the grate lakes area.