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  1. #1
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    Why are 91 2.4/2.5 blocks banned in some classes

    I see some rules single out 91's and am wondering why?
    The 7 petal front on the 2.5's
    Can't tell bore if a 2.4 or 2.5 without looking inside?
    Is there a difference between these motors(2.5) and a "newer" 93 or 94?

  2. #2
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    7 petal front is why.......other than 91 all the other 2.5 "fishing motors" have the smaller reed blocks

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  4. #3
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    Ken, i've seen porting differences in 3 different 91 blocks ive built. the one on my boat had very similar port heights to a 260. the other 2 i built had the exhaust port .100" lower than mine and idle relife nothches. i smacked the chest open on mine and it runs 110 with a small prop and turns 9k lol i kind of wish i didnt cut it because it would of made a formula class killer untill they chage the rules again up here.

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  6. #4
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    Boomer my limited experience tells me that a "killer" drag boat of any kind is more about puttin' a rig together, getting out there and steppin' on the pedal then it is shoulda/coulda/woulda.. You need to attend an event and see how much tighter the racin' is now.

    Better yet bring a boat and find out firsthand.
    04 XR 2001 RR/2.5
    94 XS 2003 GSE/ soon to be powered again
    87 Vegas XT/00 Promax soon to be for sale

  7. #5
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    Quote Originally Posted by Garth91 View Post
    Boomer my limited experience tells me that a "killer" drag boat of any kind is more about puttin' a rig together, getting out there and steppin' on the pedal then it is shoulda/coulda/woulda.. You need to attend an event and see how much tighter the racin' is now.

    Better yet bring a boat and find out firsthand.

    i had no interest in showing up to race this year after i beat everyone lastyear and everyone cried about it.. im over it. and btw im pretty sure my 200 shoulda coulda and woulda beat all the 280's that showed up...

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  9. #6
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    Now were talkin
    Let's see this thing in action!
    04 XR 2001 RR/2.5
    94 XS 2003 GSE/ soon to be powered again
    87 Vegas XT/00 Promax soon to be for sale

  10. #7
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    Boomer: Just curious but why did everyone cry about you beating them?

  11. #8
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    Because Boomer followed the rules to a tee

  12. #9
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    Quote Originally Posted by 97mirage View Post
    Boomer: Just curious but why did everyone cry about you beating them?
    what ken said... i spent a ton of TIME and a bit of money making my boat competative. i agreed at the agm and voted to make a couple changes to slow myself down but that wasnt good enough for the club, this spring the 2018 rules were listed and everything has changed my boat no longer fits comfortably in any class. i could race and likely still win the new class but im over it. this summer i ran on the lake I had as much if not more fun waking up early and running for 50 plus miles every Sunday to eat breakfast with a great group of friends.

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  14. #10
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    I'm reading this as the organizers couldn't beat you so they used the rule book to get rid of you. In racing there is no greater prize than being the one responsible for rule change. Look at the Hemi, its the only engine ever banned in Nascar as a result of its dominance. Lets see some vids of this badass rig!!!
    Hydrostream dreamin

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  16. #11
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    Quote Originally Posted by LakeFever View Post
    I'm reading this as the organizers couldn't beat you so they used the rule book to get rid of you. In racing there is no greater prize than being the one responsible for rule change. Look at the Hemi, its the only engine ever banned in Nascar as a result of its dominance. Lets see some vids of this badass rig!!!
    oh buddy my head is still inflated over it and its been over a year since i raced lol.. https://www.youtube.com/watch?v=WQmTt3kPE7g its not even that wild i had a lake cut 260. built for a bass boat. im running a cut lazer injected 91 200 on the lake this season.

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  18. #12
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    Quote Originally Posted by BoomerMuskoka View Post
    oh buddy my head is still inflated over it and its been over a year since i raced lol.. https://www.youtube.com/watch?v=WQmTt3kPE7g its not even that wild i had a lake cut 260. built for a bass boat. im running a cut lazer injected 91 200 on the lake this season.

    What a beast!
    Hydrostream dreamin

  19. #13
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    Quote Originally Posted by LakeFever View Post
    I'm reading this as the organizers couldn't beat you so they used the rule book to get rid of you. In racing there is no greater prize than being the one responsible for rule change. Look at the Hemi, its the only engine ever banned in Nascar as a result of its dominance. Lets see some vids of this badass rig!!!
    to bad the ford sohc cammer never got to waste the hemi in nascar, it would have been outlawed after the first spanking.
    I may be slow but im ahead of you.

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  21. #14
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    Well if you want to go that route on who wasn't even allowed to play? If the Frances didn't snowball Smokey Yunick? He would have bested them all over and over and over again, using a lawnmower engine if need be. That man knew how to build a race car and his quote stands true to this day; In racing theres two types of racers; cheaters and losers
    Hydrostream dreamin

  22. #15
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    Quote Originally Posted by racervboat View Post
    to bad the ford sohc cammer never got to waste the hemi in nascar, it would have been outlawed after the first spanking.
    Wasn’t the timing chain what sidelined the cammer when the 426 came out ford and Pontiac cried foul that design is the staple today hail to the hemi !

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