What pitch to go with? (4700 rpm w/ 25p)
12-14-2005, 01:43 PM
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What pitch to go with? (4700 rpm w/ 25p)
Just installed my Dana exhaust on a stock carb'd 454 magnum. It does have a edelbrock performer rpm air-gap intake.
Picked up 2mph, but rpms are still down at 4700rpm wide open. Ran both a mirage and turbo 1 25 pitch props.
Should I go with a 23 or 24 pitch? I'm looking to run 5100-5200 rpm.
Picked up 2mph, but rpms are still down at 4700rpm wide open. Ran both a mirage and turbo 1 25 pitch props.
Should I go with a 23 or 24 pitch? I'm looking to run 5100-5200 rpm.
12-14-2005, 02:16 PM
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Re: What pitch to go with? (4700 rpm w/ 25p)
Each inch of ptich is equal to 200 RPM. So I would recommend that you try a 23P of like diameter and blade design this will increase your RPM about 400 to the 5100 you are looking for.
Julie
Julie
12-14-2005, 04:47 PM
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Re: What pitch to go with? (4700 rpm w/ 25p)
Mirage Plus propellers don't come in 24 inches of pitch or we would suggest a Lab Finished version. What speed are you running at WOT? Labbing the 25 to 5000 rpm may be the best idea for top speed, and wouldn't sacrifice as much mid range speed as the 23 or 24 would.
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Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
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Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
12-14-2005, 05:58 PM
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Re: What pitch to go with? (4700 rpm w/ 25p)
Originally Posted by bbladesprops
What speed are you running at WOT? Labbing the 25 to 5000 rpm may be the best idea for top speed, and wouldn't sacrifice as much mid range speed as the 23 or 24 would.
I'm running 68mph on GPS at 4700rpm. Really hoping to hit 70 with the extra 400rpm. Who should do the labbing?
12-14-2005, 07:10 PM
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Re: What pitch to go with? (4700 rpm w/ 25p)
Labbing for 400 rpm may raise the slip too high or reduce pitch that may hurt the cruise speeds and reap smaller top end gain.
We recomend Labbing with a formula for 250-300 rpm gain and you should achieve your goal.
We recomend Labbing with a formula for 250-300 rpm gain and you should achieve your goal.
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Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
12-14-2005, 08:00 PM
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Re: What pitch to go with? (4700 rpm w/ 25p)
Zimm,
I have several props 1 or 2 might work for you.
19p Mirage SS 3-Blade repitched to 22p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 22.5 (22-23)
large surface area blades
Polished & looks NEW !
21p Mirage SS 3-Blade repitched to 23p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 23
large surface area blades give great bite
23p Mirage SS 3-Blade repitched to 24p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 24.5 (24-25)
was very effective on 21’ day cruiser 420 hp 454
Polished & looks NEW !
23p Revolution 4 Blade RH stock less than 20 hours $300
25p MiragePlus SS 3-Blade unmodified RH solid perfect $250
perfect condition very low hours
25p Yamaha Pro-V SS 3-Blade unmodified RH perfect test time only $250
perfect condition test time only
26p Chad Hill SS 4-blade unmodified RH TorqueFlo $295
I have several props 1 or 2 might work for you.
19p Mirage SS 3-Blade repitched to 22p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 22.5 (22-23)
large surface area blades
Polished & looks NEW !
21p Mirage SS 3-Blade repitched to 23p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 23
large surface area blades give great bite
23p Mirage SS 3-Blade repitched to 24p RH solid perfect $250
this prop was professionally balanced, repitched, and cup extended to full blade ear diameter
runs like a 24.5 (24-25)
was very effective on 21’ day cruiser 420 hp 454
Polished & looks NEW !
23p Revolution 4 Blade RH stock less than 20 hours $300
25p MiragePlus SS 3-Blade unmodified RH solid perfect $250
perfect condition very low hours
25p Yamaha Pro-V SS 3-Blade unmodified RH perfect test time only $250
perfect condition test time only
26p Chad Hill SS 4-blade unmodified RH TorqueFlo $295
Last edited by LFarr; 12-14-2005 at 08:10 PM.
