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06-24-2016, 01:58 PM
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#61
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Quote:
Originally Posted by shrew
192 F for Engine Temp seems high. My alarm goes off and the engine goes into guardian mode at 200. I was under the impression the operating temp should be around 165 - 175.
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I kept the factory thermostat in. it is running exactly the same temp as my suburban does,which has the same engine.
I might try a cooler stat down the road just to see if I can get lower intake Temps that way.
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06-24-2016, 02:41 PM
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#62
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,607
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Shrew I agree for an OEM application but he has used a street engine with closed cooling and for a car operating temp it is right.
Now IMO a lower t-stat should be used as the loads of running a boat are much higher and there is a reason OEM uses a lower setting t-stat.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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06-26-2016, 12:54 AM
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#63
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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picked up a few props to try for tomorrow. hopefully one of them works out.
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06-26-2016, 02:39 AM
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#64
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Admiral
Join Date: Mar 2012
Location: Lake Powell
Posts: 1,613
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I have to admit i have skimmed this thread but does anyone else fear a BOOM in the future?
I would recommend not installing an engine hatch.
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06-26-2016, 02:43 AM
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#65
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Quote:
Originally Posted by Phillbo
I have to admit i have skimmed this thread but does anyone else fear a BOOM in the future?
I would recommend not installing an engine hatch.
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Why do you say that?
what do you think is the fail point?
I do realize this combo will be brutal to the alpha 1, I'm hoping to nurse it along till fall when I can get some time to put a b1 on it.
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06-26-2016, 04:15 AM
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#66
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,607
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Quote:
Originally Posted by Corfab
Why do you say that?
what do you think is the fail point?
I do realize this combo will be brutal to the alpha 1, I'm hoping to nurse it along till fall when I can get some time to put a b1 on it.
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I don't see anything that makes me think it will go boom but not sure it meets CG regs either.
So you plan to pull the engine over the winter to change the transom assembly for a Bravo?
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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06-26-2016, 02:02 PM
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#67
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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if it has to come out, I will. now that everything is made to fit, it would come out easy.
I believe I read somewhere the bravo outer will bolt to the alpha inner. maybe it was just the bellhousing...
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06-27-2016, 06:29 PM
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#68
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Moderator
Join Date: Apr 2008
Posts: 5,684
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What is the total HP on this engine? I have a buddy pushing 400HP per side on Alpha 1's. He has to be careful about holeshots and has to run with his hands on the throttles to make sure he chops them when the drives come out of the water. However, he is running a 29 ft Fountain.
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06-27-2016, 06:59 PM
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#69
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Quote:
Originally Posted by shrew
What is the total HP on this engine? I have a buddy pushing 400HP per side on Alpha 1's. He has to be careful about holeshots and has to run with his hands on the throttles to make sure he chops them when the drives come out of the water. However, he is running a 29 ft Fountain.
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based on someone elses dyno test with te same combo (minus boat exhaust) they were at 380ish, im thinking an honest 350ish in marine exhaust trim? How much power would you say a marine exhaust loses?
Any idea what props he runs?
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06-28-2016, 01:54 PM
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#70
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Moderator
Join Date: Apr 2008
Posts: 5,684
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No idea on HP loss. I believe the Alpha limit is around 300HP & 65 MPH. I would think if you take it easy with hole shots and don't wring her out for long periods of time you'd be fine.
My buddy runs some performance SS clever props and uses external steering.
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07-01-2016, 10:14 PM
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#71
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Smart tabs deployed.
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07-02-2016, 12:17 AM
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#72
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,607
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Does the instructions say to mount them so inboard? I would think they would be more effective further out.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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07-02-2016, 03:53 AM
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#73
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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the platform distance won't allow full travel on the shock if it's mounted to the outside. where it clears, gets on the way of the tie downs for trailering. they fit where they fit.
seemed to help stability anyway. made a blast tonight.
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07-02-2016, 11:02 AM
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#74
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Lt. Commander
Join Date: Dec 2014
Location: Mass
Posts: 232
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App
What app is that in r phone ??? Looks cool
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07-02-2016, 12:52 PM
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#75
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Admiral
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,607
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Quote:
Originally Posted by Corfab
the platform distance won't allow full travel on the shock if it's mounted to the outside. where it clears, gets on the way of the tie downs for trailering. they fit where they fit.
seemed to help stability anyway. made a blast tonight.
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Understood. 
Glad they helped.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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07-02-2016, 01:20 PM
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#76
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Quote:
Originally Posted by gmc60
What app is that in r phone ??? Looks cool
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ulyssee speedometer
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07-11-2016, 12:23 AM
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#77
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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just cruising the river today on the way back from tubing. everything seems happy. other than the trim gauge that quit today.
never run out of things to do with boats.
https://youtu.be/zlmwST2XW9g
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06-02-2017, 04:54 AM
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#78
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Ensign
Join Date: May 2017
Posts: 9
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Awesome build!! I've always dreamed of seeing twin LS7's in a 29ft. Are you using a wideband O2 sensor ? Geez I've been waiting years to mustard up the courage to do a 4bbl conversion on my 4.3l , this is pretty inspiring 👍🏼
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06-02-2017, 12:26 PM
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#79
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Lieutenant
Join Date: Mar 2016
Location: racine wi
Posts: 58
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Quote:
Originally Posted by MAXUMUM OVERDRIVE
Awesome build!! I've always dreamed of seeing twin LS7's in a 29ft. Are you using a wideband O2 sensor ? Geez I've been waiting years to mustard up the courage to do a 4bbl conversion on my 4.3l , this is pretty inspiring 👍🏼
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thanks.
im behind on my plans this year, but i have an aluminum block engine i am going to freshen and use now. it should save another 75 or so lbs. the fuel injection is very "dumbed down" as it sits. i have disabled the o2 sensors(they dont like water), and it runs with no maf sensor as well.
I never got to drive my boat with the 4.3,i bought it as a project.
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06-02-2017, 12:48 PM
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#80
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Ensign
Join Date: May 2017
Posts: 9
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Got any pics of the exhaust exits? It must sound wicked coming from a little bowrider
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