Boats For Sale:
EFI Conversion on a 76 PCM 351W |
Post Reply 
|
Page <1 234 |
| Author | ||
nubf14 
Newbie 
Joined: April-14-2020 Location: Fort Mill SC Status: Offline Points: 16 |
 Post Options
 Thanks(0)
 Quote Reply
 Posted: June-08-2020 at 1:52pm |
|
|
The thermostat is 140 so ordered a new 160. Reset timing to 8 BTDC and boat is running better than ever (manual said 6 I was running 10 before). VERY pleased so far with my Sniper EFI upgrade. Also able to run ethanol gas now so saving about 45 cents per gallon in my area vs non-ethanol. I have heard some that run E85 but I am staying away. Excellent throttle response and idle/full/idle never misses a beat. New timing and lower idle setting have gotten rid of the in-gear stumble. I am still going to install the new linkage to reduce the rear butterfly open as I don't need all that for my engine under 300 hp.
O2 Profile Side O2 Front Had to use treated rods in the rear because I did not have enough room for the longer bolts in the rear holes once the 1-inch plate was installed. |
||
|
Darrell Sanderlin
1986 CC Martinique Lake Wylie, SC |
||
 |
||
|
Peter6000
Newbie
Joined: June-04-2017 Location: Northern VA Status: Offline Points: 25 |
Post Options
Thanks(0)
Quote Reply
Posted: June-08-2020 at 2:32pm |
|
|
welcome to the world of fuel injection, I'm happy to hear that you did not get scared by all the comments fro our carburetor fans.
Peter |
||
|
||
|
rosconole
Gold Member 
Joined: May-10-2008 Location: United States Status: Offline Points: 759 |
Post Options
Thanks(0)
Quote Reply
Posted: June-08-2020 at 3:06pm |
|
|
You probably already saw this about the linkage https://www.youtube.com/watch?v=ap2tdGnrmxw&t=651s
Just make sure you have E85 compatible PTFE lined fuel hoses as well. |
||
|
1989 ski nautique ,1991 barefoot nautique, 1993 Mustang Cobra 1998 5.0 Magazine shootout invitee
|
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 12:55pm |
|
|
Good morning...can you describe your setup. I am thinking of doing the same think on a 93 Nautique , I have modified the engine with a aggressive CAM and Al heads and cannot get it tuned with the holley. Did you put riser blocks in for the O2 sensors? Thank you, Brian
|
||
|
||
|
nubf14
Newbie
Joined: April-14-2020 Location: Fort Mill SC Status: Offline Points: 16 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 12:59pm |
|
|
Yes I did the riser blocks to fit.
https://photos.app.goo.gl/9CL63sBR3Y11SQTJ7 I had to custom make the rear bolts (treaded rod) as you don't have clearance for bolt.
|
||
|
Darrell Sanderlin
1986 CC Martinique Lake Wylie, SC |
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 5:48pm |
|
|
Would it be possible for you to send a drawing of the riser block? Did you do anything special to try and protect the O2 sensor? How have the O2 sensors held up? Do you require an extra fuel pump, included in package? Do you change any linkages? Thank you for your help. Brian
|
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 5:49pm |
|
|
Sorry did you buy the riser blocks?
|
||
|
||
|
gun-driver
Grand Poobah 
Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 5:58pm |
|
Link from earlier in his post
https://www.ebay.com/itm/222482543306 |
||
|
||
|
KENO
Grand Poobah
Joined: June-06-2004 Location: United States Status: Offline Points: 11112 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 7:13pm |
|
swaterca, that link takes you to an adapter for Volvo Penta manifolds, but if you go to their website (Performance Fuel Injection Systems) you can find an adapter that's for PCM 351w manifolds,if you're doing something with a 351w PCM engine. Here's a link to the right adapter plate Not really knowing what you're planning to do, you might want to surf around their store on the website  They have complete marine TBI kits too.
|
||
|
||
|
nubf14
Newbie
Joined: April-14-2020 Location: Fort Mill SC Status: Offline Points: 16 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 7:43pm |
|
|
I used the VP and just drilled the holes a little bigger. Still using the same O2 sensor. Have about 110 hours on it now. I also upgraded my distributor right after the EFI so cannot honestly say which made the biggest difference. Starts and runs like a new boat and I burn general gas (87) and have not tweaked it at all.
|
||
|
Darrell Sanderlin
1986 CC Martinique Lake Wylie, SC |
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-02-2022 at 8:27pm |
|
|
Is the part below for a PCM 351W? Thank you
|
||
|
||
|
KENO
Grand Poobah
Joined: June-06-2004 Location: United States Status: Offline Points: 11112 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 7:36am |
|
Hard to say, since you don't show any part But if it's the one linked earlier and down below again, then it's right. It has the right openings to fit the PCM gasket to maintain the water distribution as the manifold had before spacer installation. And it would be installed with the O2 sensor at the rear squeezed in under the riser The modified one that nubf14 used works for him, but looking at his installation pictures and the pictures of the Volvo plate and the way he has it installed, he's changed the water distribution path through the riser. PCM has the back opening on the riser blocked off by their gasket forcing water through the side and the front openings. That's how Darrell's port side manifold would be set up from the factory, unless he changed it. His plate and gasket setup looks to have that back opening wide open and the front opening blocked off except for a couple of tiny holes or maybe the front and rear openings are blocked Maybe he did it this way for clearance for the O2 sensor. Lots more working room with the sensor at the front. Maybe it didn't fit at the back. Does the change in the distribution have any big affect on the cooling of the riser and downstream exhaust hoses?...............probably not but it's something to think about. His seems to be working OK A search here on CCF will give you some reading on riser gasket installation. PS .........................You seem to be a little secretive about what you're planning on doing |
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 9:46am |
|
|
It looks like the kit only comes with one O2 sensor, is that all you guys used. If so did you put 2 riser plates on or just one.
|
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 9:54am |
|
|
Sorry not trying to hide anything. Rebuilt engine Al heads 175cc 62cc. Intake valve 2.02 in Exhaust valve 1.60in CAM Intake Exhaust Gross Lift 0.494 0.500 Duration 261 275 11:1 Compression. Just cannot tune the Holley 650, so looking at EFI.
|
||
|
||
|
MrMcD
Grand Poobah
Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3749 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 11:46am |
|
|
Even with aluminum heads at 11:1 compression you will have trouble trying to run on pump gas. 91 or 93 octane is the best you will come up with today. In a light car with a 4 speed and maybe a 4.11 rear gear people get away with 11:1. In a boat with high loads right off idle you are asking for detonation big time.
|
||
|
||
|
AlfaDon
Senior Member 
Joined: September-18-2011 Location: San Leandro, Ca Status: Offline Points: 407 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 12:42pm |
|
|
Too much compression for a boat engine that's under load all the time. If you can't tune it with a carb, EFI will be even more difficult All of that self learning stuff is marketing crap. You're better off paying a Holley expert to tune it on a dyno before it's installed. Then self learning can fine tune it
|
||
|
||
|
nubf14
Newbie
Joined: April-14-2020 Location: Fort Mill SC Status: Offline Points: 16 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 12:55pm |
|
|
I don't have 11:1 but the self-learning did work just painful since you don't have the manufacturer AFM (MAP or MAF) curves. Lots of options and if you can find a boat dyno that would work. The system does provide lots of possibilities for custom curves. I have had zero issues except for finding a fuel sending unit with return line built into the unit, Still trying to make that work correctly on my boat. I need to drill a new return line in the tank but have not had the opportunity (don't want to blow myself up LOL). Holley does sell a system with return at the EFI unit but that was not "Marine" approved when I started my search for EFI/TBI.
|
||
|
Darrell Sanderlin
1986 CC Martinique Lake Wylie, SC |
||
|
||
|
MrMcD
Grand Poobah
Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3749 |
Post Options
Thanks(0)
Quote Reply
Posted: June-03-2022 at 10:19pm |
|
|
Most of the EFI systems do not like large camshafts, his note says he has 261/275 duration but does not list at what lift, that cam is either fairly mild or pretty wild depending. I understand the newer systems are better than the older systems for large cams.
|
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: July-25-2022 at 7:27pm |
|
|
Here are the cam specs Intake Exhaust Gross Valve Lift 0.494 0.500 Duration at 0.050 218 224 Lobe Lift 0.309 0.3130 .006 Tappet Lift 261 275 Lobe Seperation 112 |
||
|
||
|
swaterca
Newbie
Joined: June-01-2022 Location: Texas Status: Offline Points: 8 |
Post Options
Thanks(0)
Quote Reply
Posted: July-25-2022 at 7:38pm |
|
|
Also on the PCM exhaust the back water port is blocked and the front port is open. However since the O2 sensor needs to be on the front (no room on back) this means that both the back and front port are blocked, since the riser block water port is blocked at the O2 sense. So 33% loss in cooling but the only way it will work.
|
||
|
||
|
GottaSki
Grand Poobah
Joined: April-21-2005 Location: NE CT Status: Online Points: 3363 |
Post Options
Thanks(0)
Quote Reply
Posted: July-26-2022 at 9:38am |
|
|
218/224@50 is a little hotter than mine at 214/224 and more like one of tim's at 218 duration if i recall right |
||
|
"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
||
|
||
|
Post Reply
|
Page <1 234 |
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options
swaterca wrote: