LS Build: In Progress
04-06-2019 | 08:09 PM
#231
Registered
Joined: Nov 2004
Posts: 14,109
Likes: 3,694
From: On A Dirt Floor
Coolthat you guys are able to do it. Full face helmet looks dumb when riding in a boat but it sure is warm !!!
My lake is still frozen, Our snow is almost gone,but holding out in the shade. My dirt roads still have sections with frost in them.
mggdoors - sunday better than week-day to call or ?????
My lake is still frozen, Our snow is almost gone,but holding out in the shade. My dirt roads still have sections with frost in them.
mggdoors - sunday better than week-day to call or ?????
04-06-2019 | 08:47 PM
#232
Thread Starter
Registered
Joined: Jan 2016
Posts: 493
Likes: 17
From: San Tan Valley AZ
Good point MT with superior flowing heads less duration necessary. Good example is Valakos 565 ci peaks hp at 6K with a little 236/244 duration cam. Running solid rollers to boot. Makes complete sense.
Endeavor32 and I took a not so cozy temp lake MI ride today in his 37 AT but did some prop changing and had fun regardless. Mike said my face was redder than my maga hat. Lol....
Regardless keep at it doug and I know you will. Nothing ventured nothing gained. Get some more deposits for doors and get some heads coming. You might even be able to get away with your existing cams. Good thread.
Endeavor32 and I took a not so cozy temp lake MI ride today in his 37 AT but did some prop changing and had fun regardless. Mike said my face was redder than my maga hat. Lol....
Regardless keep at it doug and I know you will. Nothing ventured nothing gained. Get some more deposits for doors and get some heads coming. You might even be able to get away with your existing cams. Good thread.
04-06-2019 | 09:16 PM
#233
Registered
Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
That will definately wake it up. I assume that's at .600 + - Ya I went with cnc brodix on my 421 sbc. It was night and day difference from the old ported camel back closed chamber heads. All takes time and money but in the end as long as you and the engines are happy that's all ultimately matters.
Do do you still have your custom BBC blower cams you ordered prior to change in builds?
Do do you still have your custom BBC blower cams you ordered prior to change in builds?
04-06-2019 | 10:08 PM
#234
Thread Starter
Registered
Joined: Jan 2016
Posts: 493
Likes: 17
From: San Tan Valley AZ
That will definately wake it up. I assume that's at .600 + - Ya I went with cnc brodix on my 421 sbc. It was night and day difference from the old ported camel back closed chamber heads. All takes time and money but in the end as long as you and the engines are happy that's all ultimately matters.
Do do you still have your custom BBC blower cams you ordered prior to change in builds?
Do do you still have your custom BBC blower cams you ordered prior to change in builds?
04-07-2019 | 10:32 AM
#235
Registered
Joined: Apr 2016
Posts: 210
Likes: 50
What would be reall estimated diference in power betwen this nice engine from thread and original Chevrolet LS3 376/480 480hp V8 Crate Engine Partsworld Performance or Chevrolet LS3 376/525 V8 Engine Partsworld Performance with marine exhausts like http://www.californiamarine.com/part...tnumber=123215 ?
Last edited by plavutka; 04-07-2019 at 10:39 AM.
04-10-2019 | 03:45 AM
#236
Registered
Joined: Jul 2005
Posts: 202
Likes: 2
From: Cedar Creek, TX
I would love to see your results with a good cathedral head. I think the LS3 style heads are not what you want in a boat. I eagerly watch every comparison I find where they compare motors with both heads and the cathedral always wins out in the torque range applicable to us. That was why I posted the link to that max effort build earlier in your thread. They could have easily chosen some wild LS7 style heads, but opted for cathedral heads to get the flat trq curve and lower rpm range. I think some of the guys posting after your results missed that link. Granted they did not have to worry about reversion or crappy exhaust, but other than that that would have made an awesome boat motor.
04-10-2019 | 10:19 AM
#237
Thread Starter
Registered
Joined: Jan 2016
Posts: 493
Likes: 17
From: San Tan Valley AZ
I would love to see your results with a good cathedral head. I think the LS3 style heads are not what you want in a boat. I eagerly watch every comparison I find where they compare motors with both heads and the cathedral always wins out in the torque range applicable to us. That was why I posted the link to that max effort build earlier in your thread. They could have easily chosen some wild LS7 style heads, but opted for cathedral heads to get the flat trq curve and lower rpm range. I think some of the guys posting after your results missed that link. Granted they did not have to worry about reversion or crappy exhaust, but other than that that would have made an awesome boat motor.
04-11-2019 | 08:40 PM
#238
Thread Starter
Registered
Joined: Jan 2016
Posts: 493
Likes: 17
From: San Tan Valley AZ
Verified cam timing. Survey says it is within .5 degrees of centerline. Out she comes. I have decided since I am going to be forced to add split thus adding overlap that I am going to step this **** up a notch. I know it will have to be dry exhaust at this point so screw it. Will give specs within the hour
Last edited by mggdoors; 04-11-2019 at 08:42 PM.
04-12-2019 | 02:25 PM
#239
Registered
Joined: Jan 2006
Posts: 3,867
Likes: 795
From: St. Pete Beach, FL
They were very high end 750hp LS7 builds. At least 427s, maybe bigger I don’t recall. A skater in Michigan had them.
04-12-2019 | 02:53 PM
#240
Thread Starter
Registered
Joined: Jan 2016
Posts: 493
Likes: 17
From: San Tan Valley AZ
