NEW MERCURY V8 INTAKE VENTS

[randycorson]

I am pretty excited to announce the “Venom Vent” is now in production! Patent pending. These added 5 mph to a 450R motor and 1.5-2 mph on the 300R. This drop in vent will fit all Mercury V8’s. We have made a mold of Steve Bishop's handcrafted design in effort to create a clean affordable solution to bringing more air into the heavy breathing V8, and cut down on pulling exhaust through the rear air plenum. These are 3D printed and finished just like they are part of the cowl. Also comes with "block-off" plugs that snap into the intake holes if wanted. It will come with a template to cut the holes and access to a "HOW TO INSTALL" Youtube video. We will doing performance gain tests soon. $1500 a set plus shipping. Installation video will be available shortly. To order, email Liberatorboats@yahoo.com Tested by Fastbass Marine here:

Liberatorboats@yahoo.com

 

[HCP3]

Nice. I am surprised Mercury didn't figure this out during R&D. Good on you .

 

[Shlbyntro]

Nice. I am surprised Mercury didn't figure this out during R&D. Good on you .

Mercury's using these engines to push fat tubs around where they're allowed to be lazy. Randy is ragging those fuckers out and making them do some heavy breathing! I think these are going to be a hit.

 

[Carlson-jet]

Would be cool to flip the scoops as well. Both options for the consumer.
Let it breath either way. Can't win if you don't play.
Looks good.

 

[attitude]

Looks way better than the vents DCB was using on one of there twin 450 M33s. Are you getting any extra MPH? I know guys were running with the cowls off and gaining quite a few MPH.

 

[lbhsbz]

Looks way better than the vents DCB was using on one of there twin 450 M33s. Are you getting any extra MPH? I know guys were running with the cowls off and gaining quit a few MPH.

This reminds me of my HF 3500W generator....I couldn't find any real good place for the air to come in so I opened up the oil check access door with it running and if I let go of it about 1/2 way open...it'll suck slam it back shut.

 

[randycorson]

We plan on doing some testing with the vented cowl and stock cowl soon! Acceleration and top end. Only problem with the 450 on a 22 Liberator is that every prop hits the limiter. I'll load the boat with passengers to see the difference in top end. Stopwatch for acceleration.

 

[Flying_Lavey]

IMHO, regardless of performance gains, these are a homerun!! They really break up the overly bland cowl and add some attitude to them I think. Kimda like the alien cowlings do on a 300x and xs.

Awesome job Randy!

Sent from my SM-G973U using Tapatalk

 

[prorider]

Damn ,only 500 a motor .

 

[Bigbore500r]

Maybe i'll slap one of these on a 150!

 

[Guest06]

Will look awesome in carbon, and a silver carbon would as well be an awesome touch, not that I’m in the wacker club tho.

 

[LBZRCKS]

I'll take a set, please let me know when you have them available. Thx

 

[Outdrive1]

The extra air won’t lean it out with the stock ecu calibration?

 

[THE Cat Sass]

X2

 

[Outdrive1]

They do look great though.

 

[LBZRCKS]

The extra air won’t lean it out with the stock ecu calibration?

These are just helping get more air flow towards the intake and not adding more air past the throttle body and MAF.

 

[Outdrive1]

These are just helping get more air flow towards the intake and not adding more air past the throttle body and MAF.

Lol. Ok.

 

[Doc]

The extra air won’t lean it out with the stock ecu calibration?

In short no. These motors probably have map or maf sensors the measure the air coming in and adjust fuel to that. Think about crazy hot days where the air is much thinner it will adjust fuel to that also. I've heard of people pulling the cowls completely off and picking up mph just from that. Obviously the don't run the boat like that all the time.

 

[Outdrive1]

Mercury is pretty precise. I know if you change an XS cowling to an Alien cowl, and you don’t do the DBR recal. You can burn it down. I’d guess these motors are built to the same standards. Just saying, but I could be way off base.

 

[Flying_Lavey]

Mercury is pretty precise. I know if you change an XS cowling to an Alien cowl, and you don’t do the DBR recal. You can burn it down. I’d guess these motors are built to the same standards. Just saying, but I could be way off base.

I'm wondering if that has more to do with the 4 stroke versus 2 stroke thing. Making heat twice as frequently in the smokers make it more susceptible to lean conditions.

 

[JUSTWANNARACE]

I would imagine that the new 4stokes are a closed loop fuel system with an o2 sensor to compensate and adjust.

I'm not aware of the 2strokes being a closed loop. More an open loop system with no o2 to compensate, so in turn it all has to be done through the ECU manipulation.

 

[Outdrive1]

I would imagine that the new 4stokes are a closed loop fuel system with an o2 sensor to compensate and adjust.

I'm not aware of the 2strokes being a closed loop. More an open loop system with no o2 to compensate, so in turn it all has to be done through the ECU manipulation.

I didn’t realize they were closed loop. That’s a huge difference.

 

[Doc]

I would imagine that the new 4stokes are a closed loop fuel system with an o2 sensor to compensate and adjust.

I'm not aware of the 2strokes being a closed loop. More an open loop system with no o2 to compensate, so in turn it all has to be done through the ECU manipulation.

I was told supercharged engines also have knock sensors, they will also bleed off boost in bad conditions in effort not to damage the engine.

 

[Outdrive1]

I was told supercharged engines also have knock sensors, they will also bleed off boost in bad conditions in effort not to damage the engine.

Even their old stuff, like 90’s 454mags and such had knock sensors that would retard timing. But closed loop was never really used with wet exhaust. They’ve obviously solved all those issues.

 

[Doc]

Even their old stuff, like 90’s 454mags and such had knock sensors that would retard timing. But closed loop was never really used with wet exhaust. They’ve obviously solved all those issues.

Yea for sure. The technology just in sensors alone has come a long ways. Agree on the closed loop with the wet exhaust, that is a huge advantage just from a tuning perspective.

 

[LBZRCKS]

Yea for sure. The technology just in sensors alone has come a long ways. Agree on the closed loop with the wet exhaust, that is a huge advantage just from a tuning perspective.

Exactly Jimmy, these are modern engines with tons of tech in them and that's why I'm not worried about leaning it out LOL. It's all metered/sensored, all these vents are doing is helping provide the airflow the computer is asking for.

 

[JUSTWANNARACE]

Exactly Jimmy, these are modern engines with tons of tech in them and that's why I'm not worried about leaning it out LOL. It's all metered/sensored, all these vents are doing is helping provide the airflow the computer is asking for.

Actually what the vents are doing is introducing fresh/cold air, not pulling the hot/stagnant air from inside the cowl. It has nothing to do with "airflow provided" as that was established at the factory.

And will the fuel system "compensate" enough for the "new" air(as most systems only compensate 10%-20% + - the fuel map in the ECU.) Time will tell.. and, will merc honor the warranty with these installed?

 

[THE Cat Sass]

FWIW....DCB has their own version of these now. Take a close look at a few of the recent M37R's. I've chatted with Tony about a set and I didn't get the impression you had to mess with the programming at all. The answer was as stated, essentially at top speed they will introduce more fresh air and reduce pulling in exhaust. As an old motor builder buddy of mine used to say all the time - "Its an edge...".

 

[Crazyhippy]

Should help with pulling spray into the cowl too... Not enough to worry about in fresh water, but salt spray causes all sort of issues!

Should be a home run!