weight concearns
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=4862
Printed Date: June-07-2024 at 6:52am
Topic: weight concearns
Posted By: 87BFN owner
Subject: weight concearns
Date Posted: September-25-2006 at 3:26pm
does anyone have any imput or first hand experience with the way reducing motor weight changing the wake behind the boat.
By weight reduction I mean going with aluminum heads and aluminum exhaust manifolds.
I want to improve HP but don't want to change the wake.
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http://i150.photobucket.com/albums/s95/buckethead1236/Barefooter6-10-09002.jpg" rel="nofollow - MY 87BFN
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Replies:
Posted By: 79nautique
Date Posted: September-25-2006 at 6:55pm
the exhaust isn't an issue but the aluminum heads are a little different since these marine engines don't get very hot so they don't expand the way they would in automotive applications and you can have issues running them, Now if it was an AL block with steel sleeves and AL heads that's different, but cast iron block and AL heads don't mix very well.
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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique
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Posted By: boat dr
Date Posted: September-25-2006 at 7:57pm
the issue i see here is not the difference in the expansion rate(this would be a moot point)between a block running at 195 degrees vs. a block running at 150 degrees,i would be concerned with the dissimular metals,electrolysis at the water inlets.a zinc anode would slow down or totaly stop this installed,then add the stainless manifolds and you have alm. oxide instead of trick heads.........also check the runner size, most have 200 to 220 cc runner size this is not condusive for proper low rpm torque production.you need 150 to 165 cc runners............. boat dr
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boat dr
/diaries/details.asp?ID=4631 - 1949 Dart
/diaries/details.asp?ID=1533 - 1964 American Skier
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