blower and power valves
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blower and power valves

  1. #1
    Member DirtyJohnson's Avatar
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    Default blower and power valves

    Are power valves really needed in a boat application? I can understand on the street but in a boat with the constant loads even when cruising seems to be on the edge. In a boat I thought most are in boost or close all the time.

    Here is what I got.
    Blown 540 and at a cruise of 3500rpm I get about 3-4 in.hg and at 4000rpm about 0-2 in.hg. This may all change with current build and blower being rebuilt but that is what I had before.

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    Plug em...

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    gn7
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    Like oil and water? Well, I guess it works in salad dressing

    The average referenced PV in a blower deal is 4.5" So ask yourself, how often will the valve be closed on your deal.
    Now going down the freeway in high gear turning 2000 and barely on the gas, the same engine combo would probably create 10" of HG.



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    Last edited by gn7; 06-06-2012 at 06:43 PM.

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    After I pluged my power valves on my blown gas caombo last year it ran much cleaner and was more responsive.

    This year I switched to E-85 and had Mark Sullens do the work on the carbs to set them up for my new combo, have yet to test them.

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    Power valves have no place on a blown engine or any boat engine for that matter in my opinion! Let the slamming begin!!!! Mark

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    gn7
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    Quote Originally Posted by ol guy View Post
    Power valves have no place on a blown engine or any boat engine for that matter in my opinion! Let the slamming begin!!!! Mark
    No slamming Mark, but PVs on a blown street car do have their place. Blown light weight street rod, not doubt, they can be a god sent.



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    So far seems to be what I was thinking and why I asked. I was running a 2.5 but was always right there so made no sense. Looks like I saved myself a headache of modifying my new carbs.

    Thanks

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    Quote Originally Posted by gn7 View Post
    No slamming Mark, but PVs on a blown street car do have their place. Blown light weight street rod, not doubt, they can be a god sent.
    Good and valid point Bob!!

    We run them in a street driven fiberglass body 32 ford coupe with a nasty blown 468 on the bottle and they work great!!! We just do not like them in the boats, just what works for us. The coupe makes 1,052 at the tires...

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    Quote Originally Posted by blownboosted View Post
    Good and valid point Bob!!

    We run them in a street driven fiberglass body 32 ford coupe with a nasty blown 468 on the bottle and they work great!!! We just do not like them in the boats, just what works for us. The coupe makes 1,052 at the tires...
    I'm sorry guys for some stupid reason I thought we were talking about marine engines Mark

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    Quote Originally Posted by ol guy View Post
    I'm sorry guys for some stupid reason I thought we were talking about marine engines Mark
    When we killed the blown 496 "marine" engine in the 21 we pulled the 468 straight out of the coupe and put it in the 21 for a few weekends to finish the season so I guess we are....
    Last edited by blownboosted; 06-06-2012 at 08:54 PM.

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    gn7
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    Quote Originally Posted by ol guy View Post
    I'm sorry guys for some stupid reason I thought we were talking about marine engines Mark
    You never were known for keeping up Mark
    Your post just sounded alittle like they had no place in a blown engine period. Regardless of its use. Sorry if I misunderstood your post.
    BUT DON'T EVER LET ME CATCH YOU DISCUSSING NON MARINE TOPICS ON THIS WEBSITE.



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    Quote Originally Posted by gn7 View Post
    You never were known for keeping up Mark
    Your post just sounded alittle like they had no place in a blown engine period. Regardless of its use. Sorry if I misunderstood your post.
    BUT DON'T EVER LET ME CATCH YOU DISCUSSING NON MARINE TOPICS ON THIS WEBSITE.
    Sorry dad I promise I wont do it again!!!!! Or maybe just till I need glasses! Mark

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    Sure glad you guys agree that power valves are not needed for at least a heavy offshore boat blown deal.
    Now, how much do you jet up from a known (dyno proven) jet number? 6 or more? Primaries only BTW.

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    Quote Originally Posted by SFOcean View Post
    Sure glad you guys agree that power valves are not needed for at least a heavy offshore boat blown deal.
    Now, how much do you jet up from a known (dyno proven) jet number? 6 or more? Primaries only BTW.
    Start at 4 over or you can go 6 and come down if lean might be an issue!

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