MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

Honestly, I think you are running into the same issues we all do when we start talking about increasing boat performance and that is, its very expensive and you quickly run into limitations of some other component. In most cases thats the outdrive. Even if you had a drive rated for more HP it would almost certainly require a change in gear ratio and that isn't cheap by any means. As you've had a chance to look at EFI kits to retro fit you can see that too has issues and is no where near as simple as bolting it on as the manufactures would have you believe and very often results in poorer performance than you began with.

If I could give any advise it would be what I tell most of my customers and friends, you come out way ahead if you sell the boat you have and buy the one you really want.

Hey mate, yeah it is true isn't it. unfortunately I couldn't buy the boat I really wanted because well theres none here. haha a nice 30ft scarab would have done me just fine. I have no idea what I would have used it for but I would have found a way. My main aim is a reliable family boat, as much as I would love to build a big block etc etc etc, that is purely because the motor is coming out of the boat anyway. im glad everyone has shared thier knowlege on the injection kits because its saved me making a $2500 mistake. :facepalm: I think I'll just clean the motor up, change the inlet and put a new carb on it. If my drive really can't handle much more power then there is absolutely no point putting a blower on it. If I lived in the states where I could buy a parts boat I would probably be going a bit silly with it, but as I dont' im going to have to settle with just making what I have nice i think

 

[Scott Danforth]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

my recommended first steps would be to make sure the throttle cable is fixed and the current carb is in working order.

then if you really want to swap parts, in addition to the carb and intake, I would look at the cam. Here is one that I would recommend http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=98&sb=2

or this one http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=99&sb=2

I would also change the exhaust to let the engine breath. here is one from your neighborhood http://www.hitekmarine.com.au/mercruiser-chev.htm

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

my recommended first steps would be to make sure the throttle cable is fixed and the current carb is in working order.

then if you really want to swap parts, in addition to the carb and intake, I would look at the cam. Here is one that I would recommend http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=98&sb=2

or this one http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=99&sb=2

I would also change the exhaust to let the engine breath. here is one from your neighborhood http://www.hitekmarine.com.au/mercruiser-chev.htm

I was looking at those exhaust manifolds. I was thinking those with a nice captains call/silent choice side exit pipes.
The cam looks good, I think I'll pull the motor down and see whats happening with it at the end of summer. (only a few more weeks to go) I'll run a duel fan set up, bring air in from both sides of the boat, so far I'm only pulling in from one side and when I open the hatch It seems to run a little less rich.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

on the shifter and carb, I ordered a new shifter so its not really a problem. The carb is going. I spoke to baz and He has a nice 4bbl carb and inlet manifold on the way for me. its costing me about $350 (plus some beer) so we should be good on that.

 

[E4ODnut]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

You're moving in the right direction, at least from my perspective. Now, if you want to get finer resolution in your engine tune, I'd strongly suggest installing a Wide Band O2 Sensor, controller and display with data logging. This is essential if you want to know what your actual Air/Fuel mix is. Depending on what style of exhaust manifolds you have, this may or may not be difficult.

As for the WB itself, Peter Gargano at Tech Edge in your land of Oz makes a very good product. Let me know if you are interested in more details as to installation.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

G'day E40, yep tech edge is on my list of saved websites. I haven't used them before personally but my mate baz has used the software before. the manifolds im thinking of are http://www.hitekmarine.com.au/products/merc-chev/front-manifolds.htm
so I'll find out what I can do with them on moday. im really trying to find where I can buy a side exit captains call exhaust? I have a ton of room to run them out to the side but with the way the back of the boat is Id have a tough time running them straight back. does anyone know where the best place to get them from is? I looked here on Iboats but I couldn't find anything?

 

[Tail_Gunner]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

This forum should not be so hard on FI. It's time marine comes out of the dark ages and old 80's smog cams. For years there has been large improvements in FI...That needs to be encouraged for fuel econ and power.

Its still very expensive and few take the time to understand it and share it. Lets not be so dismissive

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

G'day Tail_Gunner, Yeah I am a HUGE fan of FI, but nobody has a complete kit that will work as well as a factory installed FI application. I am willing to spend a couple of grand on a kit but Its just not there yet. http://www.affordable-fuel-injectio...vrolet_Marine_Tuned_Port_Injection-26-41.html
This was the closest I could find to a complete kit that should work but it still seems like a headache to get it up and running properly. I am still tossing up about buying an MPI crate motor but it seems like a waste of money at this point. My motor is still as strong as an ox so until it dies there's not an awful lot of point.

 

[dubs283]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

This forum should not be so hard on FI. It's time marine comes out of the dark ages and old 80's smog cams. For years there has been large improvements in FI...That needs to be encouraged for fuel econ and power.

Its still very expensive and few take the time to understand it and share it. Lets not be so dismissive

i dont think this forum is hard on EFI at all, i think you are mistaking some folks talking about issues with aftermarket EFI systems for marine applications for a hatred of EFI

as far as the marine industry being in the dark ages that is completely false, take a look at the new catalyzed sterndrive/inboard engines mercruiser and volvo are producing

if the op wants efi thats fine, i think it is a waste of time and he could solve his starting problems with a tune-up and carb rebuild, but its his money and time and if he wants to tinker instead of going boating more power to him

 

[Tail_Gunner]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

http://www.efisupply.com/fast_ez_efi.htm

http://www.massfloefi.com/

http://www.offshoreonly.com/forums/general-q/265811-efi-everyone.html

 

[Scott Danforth]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

I was looking at those exhaust manifolds. I was thinking those with a nice captains call/silent choice side exit pipes.
The cam looks good, I think I'll pull the motor down and see whats happening with it at the end of summer. (only a few more weeks to go) I'll run a duel fan set up, bring air in from both sides of the boat, so far I'm only pulling in from one side and when I open the hatch It seems to run a little less rich.

regarding bilge venting, one side of the boat is usually intake, the other exhaust. i would verify the direction of the vents before running a fan on both sides. My Cruisers has two blowers on the port side intake, and two exhaust tubes on the starboard side.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

if the op wants efi thats fine, i think it is a waste of time and he could solve his starting problems with a tune-up and carb rebuild, but its his money and time and if he wants to tinker instead of going boating more power to him

I think I have covered the carb issue, It will be getting a 4bbl carb. No one who has commented on this thread has said anything negative in regards to factory FI. Tinkering over winter is how I keep myself sane. If I could find a good FI kit I would buy it, but thats not the case.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

regarding bilge venting, one side of the boat is usually intake, the other exhaust. i would verify the direction of the vents before running a fan on both sides. My Cruisers has two blowers on the port side intake, and two exhaust tubes on the starboard side.

Hey I didn't even think of that. So I went out and checked....... both vents are designed to draw air in from the outside. just one has a pipe connected to it. now this has me concerned? should I take into account an exit vent when I redo the seats? i'll post some pics when the site is back up to full steam. do you know where I can get side exit exhausts from?

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

http://www.efisupply.com/fast_ez_efi.htm

http://www.massfloefi.com/

http://www.offshoreonly.com/forums/general-q/265811-efi-everyone.html

thanks man, thats some good reading right there. Although that has brought me back to the debate of FI. lols my misses is going to kill me :facepalm:

 

[smokeonthewater]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

Hey I didn't even think of that. So I went out and checked....... both vents are designed to draw air in from the outside. just one has a pipe connected to it. now this has me concerned? should I take into account an exit vent when I redo the seats?

the vents are wrong... the one with the hose should be exhaust and the one without should be inlet.

do you know where I can get side exit exhausts from?

Why? are you looking to make less power and more noise?

factory thru prop exhaust has a scavenging effect and is proven to be better than exhausting above the water for stockish engines.... now if you end up with a 600 hp engine it MIGHT be a different story but then you won't have an alpha at that point.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

the vents are wrong... the one with the hose should be exhaust and the one without should be inlet.




Why? are you looking to make less power and more noise?

factory thru prop exhaust has a scavenging effect and is proven to be better than exhausting above the water for stockish engines.... now if you end up with a 600 hp engine it MIGHT be a different story but then you won't have an alpha at that point.

I'll try and get some photos up hang on

To be honest with you, I really just dig them. People can point and laugh at me but im an engine guy through and through. My motor at the moment just sounds like a muffled kitten, I really want to Change it to a roar. My mate just bought a crownline the other day and his has the pipes factory, I tell you what it was like heaven to my ears hearing his boat start and roar across the lake. I know some people find it horrid, and hence why I want to run a captains choice so I can choose whether I want it loud or not, But To me its like the one thing I want to change because I just want it.

I watched Friscos video of the christening and I played it over and over again with the volume right up, they sound mean! on that topic he did a bang up job on that searay. Big thumbs up.

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

Boat

Interior

Vent (port no piping, cover off)

Vent (starboard with piping, cover off)

vent cover

as you can see the vents are identical, they both direct air into the boat, except one has a pipe attached. i may be missing something but based on the way they are designed they will both bring air down into the engine bay?

 

[evolution1985]

Re: MARINE PRO-JECTION THROTTLE BODY INJECTION. Any good?

Boat

Interior

Vent (port no piping, cover off)

Vent (starboard with piping, cover off)

vent cover

as you can see the vents are identical, they both direct air into the boat, except one has a pipe attached. i may be missing something but based on the way they are designed they will both bring air down into the engine bay?