1990 2.4 carb mod-vp motor specs?

[ONE-A-DAY]

I called the Mercury vintage hot line at the factory and had the serial numbers, block numbers etc., researched, and they let me know that the motors I have are not Bridgeports but are 1990 2.4 mod-vp's, the two motors also have consecutive serial numbers. So what are the specs on these motors in terms of rpm max, and what else was unique about them, higher compression, porting?

They are the original engines off of my 91 Eliminator Daytona 22 and I just pulled them off this weekend. I ran them a few times but got a deal on changing over to a pair of EFI 260's. I'm going to be listing them for sale soon but I was just looking to learn more about them and possibly get an idea on what they are worth. Compression is north of 130 on all of the cylinders, Im going to do leak down testing as well.

Thanks, Walt

367907367908

[Dave Strong]

90 Mod VP Europe 252 HP @7000RPM Chrome bore, 100+ octane is recommended fuel. That's from my 90 Merc shop manual.:)

Dave

[ONE-A-DAY]

Thanks!


90 Mod VP Europe 252 HP @7000RPM Chrome bore, 100+ octane is recommended fuel. That's from my 90 Merc shop manual.:)

Dave

[Krazymaan]

I clearly have the older Mod VP with Oval Ports and stuff. My block is a bit different than yours too and runs at 195psi's But your people say its not a bridgeport. But when you read this brochure This is a Mod Vp motor as well and its not a bridgeport buy yet it says it has bridgeports. But yet they don't classify it as a bridgeport. I find that interesting.

367935

[ONE-A-DAY]

I agree the whole era was bizarre, if the ModVP has bridged ports then wouldnt it be a Bridgeport? I think the Bridgeports came with a warranty but the mod-vps didnt. 195 psi though? Damn.

[Dave Strong]

Chrome bore motors were oval port, Bridgeport were NiC.

Dave

[Krazymaan]

Chrome bore motors were oval port, Bridgeport were NiC.

Dave


So what is the brochure trying to say? This particular Mod Vp is bridged but isn't a bridgeport.

[Dave Strong]

So what is the brochure trying to say? This particular Mod Vp is bridged but isn't a bridgeport.

HaHa, you just never know with Merc, that brochure looked like a 1990 they were chrome bore but was under the impression chrome motors were oval port. Not like Mercury ever changed things part way in production. ;):D

Dave:)

[tlwjkw]

Chrome bore motors were oval port, Bridgeport were NiC.

Dave

not all.. first bp's were chrome...... jus cause is wasn't "badged bridgeport" didn't make it not so.. didn't necessarily make it an "oval port" either..

[Krazymaan]

The point is. The person on the phone said the OP's motors are NOT bridgeports So did they make mod vp non bridgeports in 1990 or were all 1990 2.4's mod vp's bridgeports. According to the phone guy, these particular two are not bridgeports.
ONE-A-DAY it looks as if your going to have to pop off a head and figure this out. Especially if your gonna sell them.

[tlwjkw]

they built all kinds a stuff with tha 2.4 hot rods... some things built that "didn't exist" even with tha experts on tha phone..........

[Onetime]

One a day, your engines look llke the heads and intakes have been changed out with production stuff. The velocity stacks never came on them either.

My guess stock 200 heads were installed which is why your compression numbers are lower. Guessing the intakes were changed out to get rid of the cross drilled manifolds. Lower compression heads so pump gas could be run, intakes for better low rpm manners.

The Mod VP engines were 200 chrome bore blocks. Rumored they were the best of production 200's picked off the line and made to Mod VP engines. The main differences between Mod VP and production 200's were the heads, intakes, carbs and air entry plate. The Class was based on 200 production engines.

Maybe racer will chime in here as he was Mercury's thorn in their side during Mod VP racing days. He continually beat the Mercury's with OMC stuff. Again rumored that Merc wanted to beat Stoker so bad they started using Bridgeport blocks for more horsepower. Still didn't beat Al Stoker.

[tlwjkw]

one on tha left looks completely "orginal" ..... 'cept for tha bracket.

[outasite]

There may be a misconception here.The term Bridgport.It could mean different things at different times.A bridged port is where a small "bridge" carries the ring across a port,so it does not catch.Those mode VPs were finger ported and Merc could say that the block was bridge ported,meaning there was a bridge across the ports.Then at a later date that same concept was used on the exhaust port,to develop the Bridgports that we all know!

[Capt.Insane-o]

Flip one over and look up the exhaust chest.

[tlwjkw]

There may be a misconception here.The term Bridgport.It could mean different things at different times.A bridged port is where a small "bridge" carries the ring across a port,so it does not catch.Those mode VPs were finger ported and Merc could say that the block was bridge ported,meaning there was a bridge across the ports.Then at a later date that same concept was used on the exhaust port,to develop the Bridgports that we all know!

jus "WOW"............

[outasite]

That's what I'm saying,we all know what we call a bridgeport.But before that engine was developed,the term bridged port could have been in reference to the bridge that the finger port creates between the boost and the transfer port.

[outasite]

jus "WOW"............
Explain the jus "WOW"

[tlwjkw]

your full of it!... merc has never considered/called a finger ported motor as a bridge port unless its a fingered ported bridge port like tha early mod vp......................

[outasite]

tiwjkw,I don't know you,I've never met you.Seems lately every time I post,you feel the need to piss on my leg.Its great that you know what Merc considered back in 85.Most of us that post here throw stuff out there to try to help come to the correct answer for the person asking a question,myself included.Not to bash and run down what other people think.What I posted may sound like crapp to you but I can pretty much assure you, that Mercury did not coin the term Bridgeport in 1985.If you know the answers to all, please just tell the guy what he has,and save some of the others from trying to help!

[tlwjkw]

merc coined (wrong word, my mistake) it in tha sixties with inlines if ya gotta know.. only reason i get ya is cause ya seem ta pull **** outta ya head sometimes, not always, seems like just ta hear yourself rattle... we had a sayin' in tha shop "if ya don't know tha right answer, don't make one up".. don't worry, say what ya want to and these guys can take or leave it.. i'll jus leave ya alone............:)

jan: you do real good and usually very knowledgeable for tha most part then all of a sudden ya came out with some kinda off tha wall junk, like above.. thats what i don't understand?

[outasite]

You may be the smartest guy on the board,don't know,don't care.These threads are supposed to be to help a fellow boater.When you say if you don't have the right answer don't make one up,I Agree.My post said. "There may be a misconception" not that it was a fact.I threw it out there as a possibility.As for posting to hear myself rattle.No I post to try to help.With over 4000 post,you have rattled a fair amount yourself.Or you have helped a fair amount of members.Ether way,my point is just because you don't agree with a post,There is not much to gain by flaming the poster.After a whole night of BS were no closer to an answer to the question.If ya ever get this way stop by,Ill buy ya a beer.

[Dave Strong]

Flip one over and look up the exhaust chest.

This will be the answer, or if he has a bore scope pull a plug and look for bridges. Interested to know myself.

Dave

[Krazymaan]

I sure don't know but maybe Mercury coined the word Bridgeport back in the sixties, maybe not, who knows, But they sure weren't the first to have a Bridgeport across the exhaust port. My 1953 McCulloch 4 cylinder 2 stroke 100hp Military Drone engine had bridgeport exhaust ports back in 1953. 3 of them in fact. Mercury could have learned something.

368050

368051

[outasite]

I was reading a book a while ago about two cycle motorcycle porting when I was doing some squish band work.In it,it talked about Bridgports and bridge porting.I beleave the term is generic as it was referd to in the book, as a narrow bridge running through or between ports to guide the ring.Enough rattling I'm going to bed.

[Krazymaan]

I guess if you really want to know what they are, your gonna have to simply just pop off one cylinder head, take a look and the case will be solved. You can reuse your head gasket if it doesn't shred apart.