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exhaust question (Read 9048 times)

Owtlaw Austin Boater Offline Posts: 224 Round Rock, TX	Re: exhaust question Reply #15 - May 14^th, 2010 at 7:50pm If you use a radical cam with a lot of valve overlap, definitely go with thru hull exhaust. At idle, you can actually suck water through the prop into the exhaust ports.
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nathan

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Re: exhaust question
Reply #16 - May 14^th, 2010 at 9:28pm

for that reason I am only going with a cam that is factory or a little bigger but not too much. the big power gain will come in the heads, intake and card I am going to use. the motor is fighting to stay in the boat it is in now I broke a craftsman socket trying to get a bolt loose. so know it is soaking in jb80 and I will try tomarrow with a new socket. Grin

My Happy place is on a boat at the lake with my kids!!

current boats:
1983 chaparral 235 XLC (restoration)
1977 playcraft p24 pontoon (parents own now I am the mechanic)
1975 skeeter hawk (on hold)

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Captain YARRR Admin Offline Doing the rain dance Posts: 2587 Round Rock, TX Gender:	Re: exhaust question Reply #17 - May 15^th, 2010 at 9:17am I guess it's cordless drill time!
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Captain YARRR

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Re: exhaust question
Reply #18 - May 15^th, 2010 at 9:18am

Owtlaw wrote on May 14^th, 2010 at 7:50pm:

If you use a radical cam with a lot of valve overlap, definitely go with thru hull exhaust. At idle, you can actually suck water through the prop into the exhaust ports.

As a car guy, I'd never think of that when building an engine. I wonder how many people have soaked motors because that's never occurred to them? Boats are such a different world lol

2005 Sunsation Dominator 32 MCOB - twin 6.3L
2004 Dodge Viper SRT-10: 460 RWHP, 503 RWTQ

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nathan Lake Admiral Offline Going Home !!!!! Posts: 2120 Leander, TX Soon Gender:	Re: exhaust question Reply #19 - May 15^th, 2010 at 9:23am a cordless is not big enough. if i have to use anything cordless it will be a sawsall. lol
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