need help with new prop 2003 5.0l with alpha 1

[Maclin]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

One thing a time is what I recommend. You may need to dial in the 4bbl setup first, and if you change too many things at once you will not know what did what. Get a prop that fits your boat now, then when you do change to 4bbl see what it does then, like if it wants to over-rev. Then you will know to go higher in pitch and how much then, hard to say now.

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

IF your going to drop a 4 barrel on there it's about 800. it will make some difference but not a whole lot. A good 21 stiletto 3 blade ss would handle the 4barrel or a 20p 3 blade solas would do for now

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

IF your going to drop a 4 barrel on there it's about 800. it will make some difference but not a whole lot. A good 21 stiletto 3 blade ss would handle the 4barrel or a 20p 3 blade solas would do for now

Awsome thanks for the help looks like ill stick with the 2 barrel for now, so u think a 3 blade 14 1/2'' 21p would be to much for my set up now? they dont make much for a 20p ss for my boat, also Diameter dosent matter?

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

Awsome thanks for the help looks like ill stick with the 2 barrel for now, so u think a 3 blade 14 1/2'' 21p would be to much for my set up now? they dont make much for a 20p ss for my boat, also Diameter dosent matter?

http://boatpropellers.iboats.com/Me...-148-20_Propeller/767/9534/?*******=152737753


Thats the safe bet. when you ran your last test was the boat empty or loaded..You could try to swing a 21 but i doubt it would out perform the 20 in all around boating

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

It was full of fuel with two people.. got it up to 50mph at 5000 it sits an bounces off rev limit now

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

Yes your in a tight call..going to that 20 ss should drop 3-400 rpm 21 is dropping 4-500 thats a jump. Now my tub could run a 21 with 1.66 thats a 4.3 220hp...the v8 does have more tourqe so maybe but its a WAG.

20@4950 w/1.61 put's you at 53 with a people not bad
21@ 4950 does 56 how greedy are you.. it could a 300 dollar wiff..

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

IF your going to drop a 4 barrel on there it's about 800. it will make some difference but not a whole lot. A good 21 stiletto 3 blade ss would handle the 4barrel or a 20p 3 blade solas would do for now

what's a good 4bbl kit? Still looking for more out of my boat also would I have to change my timing or jets?

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

what's a good 4bbl kit? Still looking for more out of my boat also would I have to change my timing or jets?

www.cfm-tech.com makes a complete kit for the 5.0 for around 900 with intake any good?

 

[Bondo]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

www.cfm-tech.com makes a complete kit for the 5.0 for around 900 with intake any good?

Ayuh,... That link goes to the main page, not any particular intake, 'n carb...

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

http://www.summitracing.com/parts/EDL-1409/

http://www.summitracing.com/parts/EDL-2104/Application/?query=Engine+Size|5.0L/305

Id go to the I/O forums and do some research with that combo or see if bondo reply's...the 750 version is to much for a 305 and your going to need a new linkage i assume

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

Ayuh,... That link goes to the main page, not any particular intake, 'n carb...

http://marine-performance-parts.com/hipsbcm.aspx

-High Rise Cast Iron Intake
-Brand New Edelbrock Marine 4bbl Carb w/ Electric Choke
-K&N 9x4" Stainless Flame Arrestor w/PCV Tubes
-Intake, Carb, and Thermostat Gaskets
-Carb Mounting Bolts
-Intake Manifold Plugs
-Fuel Line (Mercruiser)
-Throttle Bracket (Mercruiser)
-Electric Choke Power Wire (choke is self grounded)
-RTV Silicone Sealer

thats what the kit includes not sure if it fit with the high rise? my rpms are at 4800 with the 20p ss looking to bump the power up and run a 21 pitch with the same rpm

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

http://marine-performance-parts.com/hipsbcm.aspx

-High Rise Cast Iron Intake
-Brand New Edelbrock Marine 4bbl Carb w/ Electric Choke
-K&N 9x4" Stainless Flame Arrestor w/PCV Tubes
-Intake, Carb, and Thermostat Gaskets
-Carb Mounting Bolts
-Intake Manifold Plugs
-Fuel Line (Mercruiser)
-Throttle Bracket (Mercruiser)
-Electric Choke Power Wire (choke is self grounded)
-RTV Silicone Sealer

thats what the kit includes not sure if it fit with the high rise? my rpms are at 4800 with the 20p ss looking to bump the power up and run a 21 pitch with the same rpm

Hmm give them a call and ask if that's a factory intake..If so well its really a single plane manifold good for throttle body but for a carb dual plane will give you a better response,,,Just a thought..

 

[tuttle593]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

Hmm give them a call and ask if that's a factory intake..If so well its really a single plane manifold good for throttle body but for a carb dual plane will give you a better response,,,Just a thought..

if i go with the parts u listed from summit what will i need for gaskets ect.?
also can i run the jet that comes with it or does that have to be changed, or does my timming have to change?
i just want to get all the parts an not leave anything out so theres no susprises when its installed i did some research not finding much around my year 5.0 its a 2003

 

[Tail_Gunner]

Re: best prop? 2003 5.0l with alpha 1

Re: best prop? 2003 5.0l with alpha 1

if i go with the parts u listed from summit what will i need for gaskets ect.?
also can i run the jet that comes with it or does that have to be changed, or does my timming have to change?
i just want to get all the parts an not leave anything out so theres no susprises when its installed i did some research not finding much around my year 5.0 its a 2003

Post this in I/O forum's or PM wca trm or John S....and you need gaskets...post it there you should get all the details you need