61x case porting

[Mouthfulloflake]

I had a few beers, and may have gotten too carried away with the grinder.


oops.

 

[Matt_E]

Naw...looks pro.

 

[Mouthfulloflake]

hardlo pro looking, but that was the just the rough.

I had it in my mind that changing that long rectangular port like that maybe I could increase the velocity of the intake stream..

maybe it wont work WORSE than stock.

 

[Matt_E]

I guess I should have put some smilie in my post.

 

[accbr]

Just for us cheap fockers that don't want to pay for 62t cases. :biggthumpup: I bought these cases last winter, and the previous owner said they were ported. I didn't really look at them too much until I recently bought a set of unported cases to get the crank out of them. FIgured I'd post some pics to see what you guys thought. I know this came up before, and it turned into a 62t case porting thread. Here's pics of both for comparison.

 

[Mouthfulloflake]

wow, not much at all changed there is there?

I might have OVER modified mine.

dang, know im forced to build 2 indentical engines, and use stock cases on one.

just to you, quantify the results.

my wife hates me.

:sneaky:

 

[ATS_Scott]

wow, not much at all changed there is there?

I dunno, look @ the last 2 pics. They made significant changes to the sides of the intake port, so it feeds more directly into the sides of the cylinders.

 

[waxhead]

I thnk you guys are using b-pipes as bongs

Ha ha

Nah all poer to you
but the picture in there shows the main thing on the 61x that i dislike
the boost port is in a situation where the mixture has to do a 180 degree turn
so there isnt any bdc air ram effect up the transfers

since the boost port is there to straighten flow out of the 4 main transfers it will be harder to get a consistant flow in the top of the cylinder
When you port it it may be better but its still a weak area

All power to you guys i think your doing great stuff

 

[accbr]

wow, not much at all changed there is there?

I dunno, look @ the last 2 pics. They made significant changes to the sides of the intake port, so it feeds more directly into the sides of the cylinders.

Those cuts are pretty deep too. I didn't take any pics from the top, and I've already put the crank and pistons in it. I'll see if I can get some pics of it.

 

[Mouthfulloflake]

Still not a drastic change to my eye, I see the corner is rounded off, but not huge.

 

[accbr]

more pics :biggthumpup:

 

[SurfCrazed]

thought id help yall out since i rescently ported my X cases!!:Banane01: i mainly focused on how it feeds directly into the sides of the cylinders

 

[Mouthfulloflake]

wooo hoooo

Bump for the hell of it!

 

[Matt_E]

Indeed.
I have a feeling I will be starting a 650 Homeporting thread sometime soon. Cases and Cylinders. :sneaky:

And Phill will be able to contribute on what not to do to 61X cases. :haha:

On that note, I was comparing cylinders this weekend that I ported.
Exhibit 1: A 61X cylinder with stock sleeves at 84mm bore
Exhibit 2: A 6M6 cylinder with stock sleeves at 77mm (?) bore.

Man, those 61X sleeves look like rice paper compared to the 6M6. :bigeyes:

 

[Mouthfulloflake]

Here is another photo.

61x case port job by QJS, for a fx1 project.

 

[Matt_E]

Hey! I thought of that first! I kidd, I kidd.

But, I did think of exactly that when I examined stock 61X cases this weekend over some alcoholic beverages. :sneaky:

 

[Mouthfulloflake]

I thought of it first, I started this thread, before I had ever SEEN a picture.

so there.

:biggrin:

Hey! I thought of that first! I kidd, I kidd.

But, I did think of exactly that when I examined stock 61X cases this weekend over some alcoholic beverages. :sneaky:

 

[Matt_E]

This motor project should be a nice surprise...here's a sneak preview:

(Okay, it's actually two motors)

#1 FS ported 6M6 cylinder bored to 81mm, making it a 701, on ported 6M6 cases, with Riva Red Pipe

#2 FS ported 6M6 cylinder bored to 82mm, making it a 717, on ported 6M6 cases, with Coffman Sizzler Pipe.

The porting for the cylinders is marginally different. I'll post pics when the time comes.
Also, I am not entirely sure about #2 yet. This will be my wife's Square, and she is adamantly resisting anything past stock 650 bore. Soooo....either I sneak in the big bore, or it will be limited to 633cc.

 

[Mouthfulloflake]

Does she comprehend the thermodynamics of thinner sleeves and heat transfer?

Or does she simply not want you " screwing up my boat!"

haha

My wife wants me to paint hers, she wont let me open the hood if its running.

This motor project should be a nice surprise...here's a sneak preview:

(Okay, it's actually two motors)

#1 FS ported 6M6 cylinder bored to 81mm, making it a 701, on ported 6M6 cases, with Riva Red Pipe

#2 FS ported 6M6 cylinder bored to 82mm, making it a 717, on ported 6M6 cases, with Coffman Sizzler Pipe.

The porting for the cylinders is marginally different. I'll post pics when the time comes.
Also, I am not entirely sure about #2 yet. This will be my wife's Square, and she is adamantly resisting anything past stock 650 bore. Soooo....either I sneak in the big bore, or it will be limited to 633cc.

 

[Matt_E]

LOL...yeah, it's the "screwing up HER boat" and not wanting "too much power". I don't get that one. :dunno:

She is kind of afraid of my ski - she said hers is an ideal power level for her.

She is used to last years powerplant:
Stock 650 all the way, even exhaust, with pump stuffer on top of it.

I say she's in for a surprise. :haha:

EDIT: But yes, she does want it painted. That's THE number 1 thing on HER list. PINK.