How much power did the 2.5 Mod VP make?

[steve]

Looks like the 225 ProMax prototype . I have a pristine 1992 Mod VP motor . Need more info about them. Value would be nice too. This ones got extremely low hours--looks like it was just assembled! Analog ECU is the downside. Let me know what you can share with me about this baby. Thanks

[Scream And Fly]

I thought 250 HP

Greg

[Cp]

....that's what I've always heard. Laserized Mod-Vp. Take some pics. Let's see. Cp


PS - Check your email.

[Firestarter]

Ted Greguc told me his made 262hp---and won the World Championship with that.

[steve]

Thats about 240hp. I'll measure the port timing again. Approx value for the drop on? Its got to be a very very low hour motor by the looks of the sleeves. Came off a big heavy ski boat if you can believe that! Ran it for a short time and pulled it off. Probably lacked for bottom end. More info please. Thanks

[Firestarter]

Powerhead.
I really don't know much more about it.

RT

[JCSmile]

Very old thread... Anybody remember anything about the 2.5 modvp? Port heights? Power? I think I've got one. 91 stamped block with no machining for oiling system, rod slots, 4 bolt main, idle relief sleeves. It's been posted and exhaust is hogged out, though it sure doesn't look like factory work

[tlwjkw]

idle relief sleeves.

think this would make it some kinda "bastard" motor.... wouldn't think "idle relief sleeve" and high performance go in tha same sentence... jmo

got pics?

[LakeFever]

The idle relief sleeves is very odd for no oiler? Sleeves have been swapped out is my only guess. To my knowledge the only 2.5 that came with idle relief sleeves is the XR6 which is the BB block which didn’t arrive until 93 iirc.

[JCSmile]

[JCSmile]

Block is unpainted, oil gear is machined on the block side but not the front half side.

[tlwjkw]

if tha fuel pump vacuum orifice hole has a brad in it its from a 245.. never seen that block half ina '91 but its merc, sooooooooooooooooooooooooo. anything is possible with them and/or hot rod guys... jmo.

[JCSmile]

When in doubt, ask James Perry. Here is an awesome template from the 2.5 modvp. Certainly a little different from a 245/260 map, but it's similar. Mine is quite similar to this, but the exhaust is raised

[skialot2]

Interesting, I have a running 1991 200HP 7 petal F block. When checking with my borescope I can see it has the exhaust relief notches. 1991 is the oddball year when 2.5's were just coming out. Did Merc use notched sleeves on all 2.5's in 1991?

[skialot2]

Looked at your pictures again. I think you have mis matched block halves. Looks like you have a 200 F block with the paint removed. And a high performance front half. That's why the block is milled for oil injection but the front half is not. It's obviously been blown up a couple times.