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02-08-2018, 09:25 PM #1
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1989 Mercury 2.4 Bridgeport blown up!! Options ?
hello all i have a 1989 mercury bridgeport EFI on a 20ft tunnel that i recently blew up. My question is can i put drop on 225 promax or say 260 on this mid or would i have to change a lot of things. Just putting my feelers out there to see what my options are. thanks in advance.
Josh
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02-08-2018, 10:05 PM #2
8000 RPM
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Swap away. After a 2.5 you’ll never look back to a 2.4
'95 STV "The Blue Goose"
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02-09-2018, 12:21 PM #3
Screaming And Flying!
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If you go with the Pro Max get the 2 piece exhaust adapter with it to ensure no cooling issues.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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02-09-2018, 07:21 PM #4
5000 RPM
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why don't the pro max engines work well with the one piece adapters?
Originally Posted by Dave Strong
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02-09-2018, 07:40 PM #5
Screaming And Flying!
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Steel bore motor with poppet and t-stats and none of the other mods needed.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
"So many idiots, so few bullets"
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02-18-2018, 10:11 PM #6
Scream And Fly VIP
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If everyone is throwing their 2.4's away, I will be more than happy to take them.
If I don't ask any questions, I'll never learn anything.
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W2F a V-King liked this post
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02-18-2018, 10:30 PM #7
5000 RPM
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Same here! I’ve got a collection going, and no shortage of ideas to try on them! Originally Posted by Krazymaan
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02-19-2018, 09:00 PM #8
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Your 2.4 Exhaust plate has smaller ports than either the 260 or ProMax... As Dave said, go to the two piece if you go ProMax... make sure its got the large ports vs small (both are out there) that's(ProMax)a steel sleeve engine so better running two piece plate for temp control reasons... if you go, 260/280/drag, you either need to open up your existing one piece exhaust plate to the match larger ports... or swap to a 260/280/Drag exhaust plate...
Originally Posted by joshyb
Mike Nass
Haulin Nass RaceBoats (HNR)
www.haulinnassraceboats.com
e-mail - MikeNass@shaw.ca
phone - 604-230-4835
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02-20-2018, 05:48 PM #9
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you can go 6 steel sleeves in the bport and still have the case/horn injection and spin higher than pmax, be a tad smaller on low end torque, but pass it on top end. We all got sick of re nicasilling 2.4's, just do like merc did with 225 pm. Steel sleeve it, good porting is there and you already have most of the parts you need Originally Posted by joshyb
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02-20-2018, 09:34 PM #10
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If you steel sleeve it 2.5 is a option some of the guys are doing it ,Very good results .just Saying!!!
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02-21-2018, 09:13 AM #11
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I really appreciate all your guys info I will be purchasing a promax ph as well as offshore can and now in search of a 2 piece plate. I will have all my bp efi stuff up for sale on here soon let me know if anyone is interested in parts.
Josh
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02-21-2018, 03:24 PM #12
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Send the bridgeport front 1/2 to Jeff Dunn, he will cut it to fit the promax block,then you can use your horn front and flow more air. i have one at his shop now, i have a 245 block i have already steel sleeved Originally Posted by joshyb
Last edited by Varmint; 02-21-2018 at 03:26 PM.
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02-21-2018, 05:51 PM #13
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do you have contact information for Jeff, or is he on the site? Originally Posted by Varmint
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02-21-2018, 08:22 PM #14
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What noah said !! ill take his contact info as well or you can pm it to me please i am very interested in doing that.
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02-22-2018, 12:41 AM #15
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If parting out i would be interested in the efi harness and the top bearing cap.
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