Looks too loose to me ..

[Chaz]

Yes , both "stock replacement" from Advanced .
( both .040 larger on the O.D. to go in repaired blocks )

The X exhaust port is higher , so it opens sooner and closes later .

The XS has milder porting and uses it's slightly larger displacement (stroke) to give it more torque across the board .

As any porting guy will tell you . It's better to have material in the way , than need it and not have it ....
Use-ta be ( 35 years ago ) you could get away with making the top of an exhaust port flat the same length as the a transfer port and then roll the corners down . Made for some tight corners much like the X has . Produced power , but tougher on rings.
With sweeping radiuses on the XS port , it's size can be exaggerated without fear of pushing the ring into a tight corner as the port is closing .
I know they rolled the top of the transfer over to keep the fresh charge from "short circuiting" but the same principal applies .

[cali kid]

The window at the bottom of the sleeve on the x motor is taller. Do you relieve any of the side piston window to take advantage of this? It looks in your video like the pistons come out of the deck, stroker maybe. The pistons look like Wiseco. Can't quite make out the part # though. The extra beef around the sleeves doesn't look like anything I've seen before. Give us some more info I can steal Chaz.

[vnemous]

I just now watched the video. Did you realize the piston fell out????? I think the wrist pin was not connected.

[powerabout]

Yes , both "stock replacement" from Advanced .
( both .040 larger on the O.D. to go in repaired blocks )

The X exhaust port is higher , so it opens sooner and closes later .

The XS has milder porting and uses it's slightly larger displacement (stroke) to give it more torque across the board .

As any porting guy will tell you . It's better to have material in the way , than need it and not have it ....
Use-ta be ( 35 years ago ) you could get away with making the top of an exhaust port flat the same length as the a transfer port and then roll the corners down . Made for some tight corners much like the X has . Produced power , but tougher on rings.
With sweeping radiuses on the XS port , it's size can be exaggerated without fear of pushing the ring into a tight corner as the port is closing .
I know they rolled the top of the transfer over to keep the fresh charge from "short circuiting" but the same principal applies .

cant really compare ports in a sleeve if the strokes are different

[AZMIDLYF]

When I said closing sooner I was referring to the bottom of the port on the X sleeve beginning the closing process because it does not seem as low as the XS. I understand what you mean on the total port closing later.

Do you alter the port timing on motors or work mostly on improving the flow? I would assume if you are building strokers then you are altering the port timing. Isn't a dyno the only way to really test your work though?

[powerabout]

Port opening time with degree wheel is where you start so you know what you have.
Measuring port heights from the deck is a rough and ready method

[cali kid]

I just now watched the video. Did you realize the piston fell out????? I think the wrist pin was not connected.

Not the one that fell out. Look closely at the others.

[cali kid]

That link is a short video . I haven't got a handle on a good place ( besides slow loading you tube ) to load vids .

Link : https://i.imgur.com/LiObFIk.mp4

Besides the torque from the increase in displacement . The port window's get much wider even when sticking with Mercs conservative port width / bore ratio ..

I like how you tapered the port from top to bottom. Wide where most of the blow down takes place, narrow at the bottom to help the rings, and contain some of the transfer. How far down the sleeve do the reinforcements rings go?

[Chaz]

The window at the bottom of the sleeve on the x motor is taller. Do you relieve any of the side piston window to take advantage of this? It looks in your video like the pistons come out of the deck, stroker maybe. The pistons look like Wiseco. Can't quite make out the part # though. The extra beef around the sleeves doesn't look like anything I've seen before. Give us some more info I can steal Chaz.

Even if you could read the number they will tell you it's a custom . You have to develop your own which would be assigned it's own number .

3.00" stroke , block is decked , but they are still in the hole . Final P/H clearance is cut into the chamber .

vnemous

I just now watched the video. Did you realize the piston fell out????? I think the wrist pin was not connected.

My friend in the UK said to use light weight "gudgen" pins ... I didn't know what the heck he was talkin about , now I do ..

Power

cant really compare ports in a sleeve if the strokes are different

Power

Port opening time with degree wheel is where you start so you know what you have.
Measuring port heights from the deck is a rough and ready method

Power , I always like how you make a statement , then have the ability to throw yourself under the bus with the very next one ..

Cali
I like how you tapered the port from top to bottom. Wide where most of the blow down takes place, narrow at the bottom to help the rings, and contain some of the transfer. How far down the sleeve do the reinforcements rings go?

Just above the top ring . You never want to block that area from seeing water.

[AZMIDLYF]

I actually do enjoy reading posts with the hints about things only 10,000 hour guys would know.

[cali kid]

I actually do enjoy reading posts with the hints about things only 10,000 hour guys would know.

So do I. I wonder if he'll show us the complete powerhead.

[vnemous]

So do I. I wonder if he'll show us the complete powerhead.

Hopefully in January we will all see complete powerhead(s) and on the motion and we can once again rule the St Lucie waterways And no TUX they are not wheelie bars.......

[Chaz]

So do I. I wonder if he'll show us the complete powerhead.

You'll be disappointed . They always look like stock 225's that had holes knocked thru them that nobody else wanted .
A 2002 and up EFI has all the parts to make over 300 hp , except for a reed adapter plate and the ECM needs to be reflashed . The rest is machine work .

[Snotrekie]

no one it talking about the rear transfer port and it's starring you right in the face!! I will tell you that more gains have been made there in other forms of racing than in how many degrees of exhaust port timing. jus' sayin'..

[cali kid]

You'll be disappointed . They always look like stock 225's that had holes knocked thru them that nobody else wanted .
A 2002 and up EFI has all the parts to make over 300 hp , except for a reed adapter plate and the ECM needs to be reflashed . The rest is machine work .

I have been using X reed plates from Merc on my motors. Cost around $600. The motor I'm building now is based on a 2002 EFI. Past motors I used fuel rails with in and out lines, and a regulator on the return. The stock EFI rail deadheads one fuel line to the rail. Regulator is on the VST. Will it work ok? I use pink injectors. I also am trying teardrop all metal reed blocks squared and opened up with CC reeds. I use an opti plenum with a Simons butterfly. Looks like you might use a Taylor set up.