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Thread: Low rpm horned 225 promax
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06-24-2018, 12:31 AM #1
Low rpm horned 225 promax
Have a brand new horned promax 260 front half .. 141 lightened and balanced rods.. top pin wizards std bore.. 140 psi compression ..2.0 big bearing crank.. fresh injectora from trea appling.. 260 fuel rail ... brand new stator and trigger and efi injector harness from dean pink ...i ran a 22 pitch on it with 1.87 gears on my cle 2006 comp vking... at 7700 roms with a A6 curve on brand new brucato had it leaned down 10 percent .. but i put my 30 pitch yamaha drag.. hoss 30p .. or 30 et 5/8 inch above the pad non of the 30s will turn over 6300 rpms pulls strong to 6300 then like it hits a wall i have .. leaned it down up to neg 5 and ran it upto plus 10 nothing still 6300 .. at 56 psi on regulator had a 200 that would turn a 30 over 7 bone stock with tight heads.. and promax has all 16 amp electronics and light flywheel and 260 divider plate 20inch mid 1 piece adapter and 280 turner .. wondering if needs to be leanee on regulator or got something else going on ..sorry for long post trying to get all questions answered first
1979 hydrostream vector sold
2001 american offshore 26 twin 300 promaxs
2006 hydrostream comp vking horned 225 promax/
1986 23ft twin engine eliminator twin 225 promaxs SOLD
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06-24-2018, 05:59 AM #2
have ya tried anything "in-between" tha little one and tha big ones?.. was tha pm block cut for tha big bearing or is justa a big "journal" crank?...
Last edited by tlwjkw; 06-24-2018 at 06:05 AM.
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06-24-2018, 05:02 PM #3
Just big journel
1979 hydrostream vector sold
2001 american offshore 26 twin 300 promaxs
2006 hydrostream comp vking horned 225 promax/
1986 23ft twin engine eliminator twin 225 promaxs SOLD
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06-24-2018, 05:29 PM #4
that ruins my "keyboard diagnostics"!!!... sorry, it would be justa guess for me "on here" anyway.. sounds like ya got 'bout everything covered...
post tha fix when ya find it..gl.
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06-25-2018, 08:22 AM #5
Yessir been driving me crazy iam keep tuning and picking at it till i get something going thinking next try is to turn the fuel pressure down from 56 psi to maybe 50 and try that and leave box at 0 on steam wheel and put new plugs in hit wot and pull plugs
1979 hydrostream vector sold
2001 american offshore 26 twin 300 promaxs
2006 hydrostream comp vking horned 225 promax/
1986 23ft twin engine eliminator twin 225 promaxs SOLD
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