Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #21  
Old 08-17-2006, 06:00 PM
jimmer2880 jimmer2880 is offline
MC Maniac
 
Join Date: Jul 2004
Boat: 95 PS 190 EFI
Location: Hagerstown, MD
Posts: 3,059
Send a message via AIM to jimmer2880
Quote:
Originally Posted by east tx skier
I think there are two injectors on the Indmar TBI setup.
Correct, my TBI has 2 injectors.

If I remember correctly, I thought our stock MC TBI's were the same as an early 90's Camaro.
__________________
If one day you're asked:
" How did you spend your time here on Earth?"
Will you say:
"I kept a crabgrass free lawn"
It's time to SKI.
Reply With Quote
  #22  
Old 09-10-2006, 10:19 AM
tdaines@hotmail.com tdaines@hotmail.com is offline
TT Regular
 
Join Date: Jul 2006
Boat: 1984 ProStar 190 Stars N Stripes
Location: West
Posts: 34
Hey, I have had a lot of experience in this - and there is hope for you! TBI Injection is fine for the reliability that you're after, and a complete kit with in-tank fuel pump, high pressure lines, filter, and the TBI will run you around $1500 and take a fairly skilled back yard mechanic 8-10 hours to install. Electrical work is also required.

Port Injection aftermarket kits for marine apps don't really exist - you'd have to retrofit from a totalled boat, including HEI ignition and the manifold. It would be a major hassle...

The good news is this: I've been through it twice on my last two PS190 boats. The simple fact is that marine carbs aren't built to last 15 years. That doesn't mean, however, that they aren't any good. If you want an easy, fast, painless solution, I'd go down to the local NAPA store in your town, and have them order you a brand new HOLLEY Marine carb for your boat (4000 series, probably). They retail at MC dealerships for $730, but go for $509 at NAPA!

Trust me on this one - I've done it twice, and my boats start on the frist turn of the crank, and run like a fuel injected boat. Most people can't believe how well my boats run...

Good luck!

TIM
Reply With Quote
  #23  
Old 09-10-2006, 10:20 AM
tdaines@hotmail.com tdaines@hotmail.com is offline
TT Regular
 
Join Date: Jul 2006
Boat: 1984 ProStar 190 Stars N Stripes
Location: West
Posts: 34
Oh - One more thing - VERY IMPORTANT!!!!

NO Carb or FI designed for street cars is either SAFE or EFFECTIVE on a boat! Please don't try it.

TIM
Reply With Quote
  #24  
Old 09-10-2006, 02:01 PM
jake's Avatar
jake jake is offline
TT Enthusiast
 
Join Date: Jul 2004
Boat: 93' Prostar 190
Location: Minneapolis
Posts: 374
Send a message via Yahoo to jake
Quote:
Originally Posted by tdaines@hotmail.com
Hey, I have had a lot of experience in this - and there is hope for you! TBI Injection is fine for the reliability that you're after, and a complete kit with in-tank fuel pump, high pressure lines, filter, and the TBI will run you around $1500 and take a fairly skilled back yard mechanic 8-10 hours to install. Electrical work is also required.

Port Injection aftermarket kits for marine apps don't really exist - you'd have to retrofit from a totalled boat, including HEI ignition and the manifold. It would be a major hassle...

The good news is this: I've been through it twice on my last two PS190 boats. The simple fact is that marine carbs aren't built to last 15 years. That doesn't mean, however, that they aren't any good. If you want an easy, fast, painless solution, I'd go down to the local NAPA store in your town, and have them order you a brand new HOLLEY Marine carb for your boat (4000 series, probably). They retail at MC dealerships for $730, but go for $509 at NAPA!

Trust me on this one - I've done it twice, and my boats start on the frist turn of the crank, and run like a fuel injected boat. Most people can't believe how well my boats run...

Good luck!

TIM
Tim: I love to hear from people with practical experience. What benefits do you see to a new carb over rebuilding the existing one. I have the 4010, but don't really have issues with the hot stalls, which is the primary reason to abandon the 4010 from what I've heard. I just can't get it to idle reliably, I have to run it quite rich to get easy starts and smooth idle.
Reply With Quote
  #25  
Old 09-10-2006, 05:08 PM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,546
The TBI system on the boats is really the same as what was used on cars and trucks. There's a septum in the intake manifold and one injector feeds each. It's not an Indmar system, Indmar takes an existing one and adapts it for marine use.
Reply With Quote
  #26  
Old 09-10-2006, 08:41 PM
JDK JDK is offline
TT Enthusiast
 
Join Date: Apr 2005
Boat: PS 205
Location: Saskatoon, Sask.
Posts: 460
Quote:
Originally Posted by JimN
Indmar takes an existing one and adapts it for marine use.
....except for the damn fuel pump (the engine mounted one with the internal by-pass). I've looked and looked and looked for a 'generic replacement'.
Any ideas as to what other applications this pump may have been used in???
Reply With Quote
  #27  
Old 08-19-2011, 05:34 PM
Credo Credo is offline
TT Newbie
 
Join Date: Aug 2010
Boat: 1994 Prostar 190 Stars and Stripes
Location: Southwest
Posts: 12
The only question that I have with using a car multiport injection system ona boat would be the 02 sensor. I know that Ford ECU's take their main readings from the MAF and O2 sensor wouldn't a wet exhaust system corrupt the reading from the 02 sensor? And make the engine think its running rich?
Reply With Quote
  #28  
Old 08-19-2011, 05:58 PM
gr82bgreen's Avatar
gr82bgreen gr82bgreen is offline
TT Enthusiast
 
Join Date: Aug 2010
Boat: 1995 maristar 200 vrs
Location: Calgary
Posts: 186
Quote:
Originally Posted by Credo View Post
The only question that I have with using a car multiport injection system ona boat would be the 02 sensor. I know that Ford ECU's take their main readings from the MAF and O2 sensor wouldn't a wet exhaust system corrupt the reading from the 02 sensor? And make the engine think its running rich?
You could run it without the sensors. it would be in open loop and would set codes, but it would run fine. The maf was not used on the older speed density system, but that system is calibrated to the car or trucks camshaft. I think the boat cam would run ok though. I don't know how the prograqming would translate form a car or truck, to a boat though. Ive heard its a bad idea to install automotive efi on a boat. probably cheaper and less headaches to upgrade to a new boat with efi. You would need lots of new parts, intakes, new fuel pump and lines, ecu, a wiring kit to make it work. would have to find a dry sealed place for the comupter.
Reply With Quote
  #29  
Old 08-19-2011, 07:56 PM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,546
Quote:
Originally Posted by tdaines@hotmail.com View Post
Oh - One more thing - VERY IMPORTANT!!!!

NO Carb or FI designed for street cars is either SAFE or EFFECTIVE on a boat! Please don't try it.

TIM
The real difference between a stock GM EFI engine and these is the fact that, if the engine stops running with the key ON, these boat engines shut off because they're programmed to. Other than that, it's basically standard stuff. The LTR and some other intake manifolds are different but the rest isn't exactly what would be considered 'exotic'.
Reply With Quote
  #30  
Old 08-19-2011, 08:02 PM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,546
Quote:
Originally Posted by gr82bgreen View Post
You could run it without the sensors. it would be in open loop and would set codes, but it would run fine. The maf was not used on the older speed density system, but that system is calibrated to the car or trucks camshaft. I think the boat cam would run ok though. I don't know how the prograqming would translate form a car or truck, to a boat though. Ive heard its a bad idea to install automotive efi on a boat. probably cheaper and less headaches to upgrade to a new boat with efi. You would need lots of new parts, intakes, new fuel pump and lines, ecu, a wiring kit to make it work. would have to find a dry sealed place for the comupter.
If you disconnect the TPS, it will default to 12% throttle position at all times and that won't run "fine". If the MAP sensor is disconnected, the ECM will have no idea how much fuel to deliver, so that will default to a setting that won't allow good performance. If the ECT is disconnected, the ECM will think the engine is at about -40F, or below, so it will run exceptionally rich. If the knock sensor is gone, it will want info, so it will prevent correct timing advance and throw a code, too. How does this qualify as "fine"?

A really easy way to upgrade to EFI is to buy a GM Performance Parts crate motor, like the 350 RamJet. 350HP/390Ft-lb of torque, it uses the same ECM and any GM dealer can service it when the warranty is still in force. The thing about MC- they calibrate teh engine to the boat, not a generic weight load.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 12:50 PM.