SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: el mojado on August 09, 2016, 09:45:53 PM

Title: Exhausted
Post by: el mojado on August 09, 2016, 09:45:53 PM

Looking for that last bit of HP. What are your opinions on me enlarging or just removing that plate with the flange. The difference in size looks to be quite a bit. 454 .030 over, 049 heads, larger valves,

Title: Re: Exhausted
Post by: GT Jets on August 09, 2016, 10:35:47 PM

I don't think a difference (a positive one anyway) will be realized.

JMO

Title: Re: Exhausted
Post by: el mojado on August 09, 2016, 11:17:35 PM

I was under the impression that bigger is better when it comes to exhaust in marine applications. Can you elaborate GT? I'm learning.

Title: Re: Exhausted
Post by: GT Jets on August 10, 2016, 06:39:50 AM

I believe that plate creates an eddy that enhances flow and improves scavenging.

Those anti reversion rings help keep exhaust pulse down,  controlling water reversion, but more importantly,  helps equalize the exhaust pressure from cylinder to cylinder.

If it was me personally,  I would keep them. Now if you were supercharged or turbocharged, different argument all together.

Could be FOS.

GT

Title: Re: Exhausted
Post by: el mojado on August 10, 2016, 10:57:33 AM

I always like your disclaimer, GT. Thank you.

Title: Re: Exhausted
Post by: GT Jets on August 10, 2016, 11:07:04 AM

Quote from: el mojado on August 10, 2016, 10:57:33 AM

I always like your disclaimer, GT. Thank you.

propless is back on here.  Need to stay on point.

;D

GT