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dnr78
10-20-2011, 12:35 AM
im running an 89 2.4 bridgeport efi
i was told that this is a Z block
how do i verify this and
what does that mean any info is appreciated
Dan
rock
10-20-2011, 08:02 AM
The bridge I am familiar with is verticle. The Z runs at an angle from top to bottom.
Rock
tlwjkw
10-20-2011, 08:19 AM
Z is a 2.5 and kinda hard ta find........Guys tend ta hoard 'em from what I've seen. Think I've seen two, maybe three go up for sale on here over tha years...
RBT
10-20-2011, 08:28 AM
I have seen 2.4 z ports, so it could be. more common on the 2.5's. Nobody that I know builds them anymore.

RT
h2oskiier30
10-20-2011, 08:50 AM
I saw a Z port 2.5 block that is about to be built this past week in a shop. First one I've ever seen in person.
tlwjkw
10-20-2011, 09:10 AM
Never saw tha 2.4. Wasn't one of those "better ideas".........was it?
Jay Smith
10-20-2011, 09:20 AM
I owned one (2.5 Z port from the Canadian Dentist , Alex Hledin ) . "Wouldn't out run my dog with a full badder" !

just my findings !
Jay
RBT
10-20-2011, 09:25 AM
I saw a Z port 2.5 block that is about to be built this past week in a shop. First one I've ever seen in person.

Cool, a lot of work.
Way2slow on H2O
10-20-2011, 11:32 AM
Cool, a lot of work.Yes it is, a lot of tedious welding on the block, then some tedious mapping on the CNC for the sleeves.... is it worth it??? I'll know this winter when I get mine on the water.

The 1200R jet ski uses the "Z" port and puts out more power per cc than any 2 stroke we know of.
h2oskiier30
10-20-2011, 11:32 AM
The Z port motor Russ Bentley ran two years ago at Gulfport wore everybody out in Lake Racer. It was quicker than a shart.
patchesII
10-20-2011, 11:47 AM
Russ's motor is VERY strong. I'd love to have that motor but I think it's gonna be buried with him. Lol
RBT
10-20-2011, 11:53 AM
Russ's motor is VERY strong. I'd love to have that motor but I think it's gonna be buried with him. Lol

Alex Hledin PTR built it. He is one of the HP kings.
Probably had water cooled bridges in it. Though, I think his oval port motors make more power, and who is to say it is a z/bridge motor.
dnr78
10-20-2011, 08:41 PM
It is a z port I seen the insidesWhat are real world advantanges vs.disadvantagesI know it's older tech but they are still usedI know it runs like a raped ape so it ain't a tired dog witha full bladder;)
I also know that I'm sacrificing CI to all but the v-4
Any other differences other than ports
I was told to rering every 100 hours , true?
Thanks Dan
SS170
10-20-2011, 08:47 PM
I have a Z port that I think will be for sale. Sold my Ally and its just sitting there.Not quite sure what I want to do with it. Its a strong running motta.
h2oskiier30
10-20-2011, 09:15 PM
I was told to rering every 100 hours , true?


If it's a nic block, mileage (hours between refreshing) will vary depending on how hard you run it.

Not sure about the 2.4 Z port engines, but I'm pretty sure the 2.5 Z ports were/are steel sleeve motors.
Way2slow on H2O
10-20-2011, 11:19 PM
If it's a nic block, mileage (hours between refreshing) will vary depending on how hard you run it.

Not sure about the 2.4 Z port engines, but I'm pretty sure the 2.5 Z ports were/are steel sleeve motors.My 2.5 "Z" is nic........... 3 grand just for sleeves :eek:

My next one will be steel :D It can be bored when the nitrous goes south :reddevil: