Any Interest In Revisiting Porting The 550XP?

[Mastermind]

Ticks don't come from trees. Google ticks falling out of trees.

I know.......the *******s crawl up my legs and bite me.

I hate em......almost as bad as chiggers. :msp_unsure:

 

[wyk]

I know.......the *******s crawl up my legs and bite me.

I hate em......almost as bad as chiggers. :msp_unsure:

This is the 21st century, Randy. We call them Chegroes now.

I pull them off of dogs nearly every week at the rescue I volunteer at. They taste terrible.

 

[Mastermind]

While the jugs are in the ultrasonic cleaner, I'll post a few pics of some of the tools that make doing this a bit smoother.

It takes a bunch of different sizes and shapes on the burrs. I like the Alumihog burrs and fluted milling bits for roughing in, then single cut carbide for final rough in. I also use diamond burrs between rough in and sanding.

The most useful tools I have are the RT angle CC handpieces. I use one for left hand cutting and another for right handed burrs. The straight handpieces are just Foredom #30s. We have several of them so bit swaps happen less often.



Here's another thing that's simple but tough to do without.



We've been wearing these cleaners out.......the small HF units only last about 9 months. Then they fall apart. I hope this one lasts a while.

 

[morewood]

Operators are standing by. :msp_thumbup:

I don't doubt it. Mine would be red/black however. I hear they can be made to cut faster.:msp_w00t:

Shea

My first saw was a 2050 TURBO!!! Time to get back to the red and black.

 

[Mastermind]

Some before and afters.......

 

[Mastermind]

So, let's talk about timing numbers for a minute.

Stock:

Squish: .034
Ex: 105°
Tr: 116.5°
Stratos: 71°
In: 73°

Ported:

Squish: .020
Ex: 105°
Tr: 116°
Stratos: 75°
In: 78.5°

 

[Mastermind]

As you can see, I didn't change the exhaust or transfer height. I let the machine work add duration to the intake, and stratos. That, along with a compression increase, flash removal and smoothing of the flow path, a muffler mod and ignition timing tweaks is all I do to one of these. Simple huh? :msp_thumbup:

 

[Termite]

I remember you didn't like advance timing on a work saw. Does this one need it?

 

[Mastermind]

I remember you didn't like advance timing on a work saw. Does this one need it?

There are a few saws that really benefit from advancing the timing.......this one likes it. :msp_thumbup:

 

[SierraWoodsman]

Got twins here.......

Twins....,Make it triplets Randy, mine should show up Monday.
opcorn:

 

[Mastermind]

Twins....,Make it triplets Randy, mine should show up Monday.
opcorn:

See, I thought I had three here already......there's that third one I was thinking about. :msp_mellow:

We've got saws here. I'm thinking about just selling all of mine, so I'll have more storage.

 

[Termite]

You make it seem easy and I've got my South Bend lathe all set up. Maybe I should? Maybe I should stick to woodworking!!! :msp_unsure:

And let you do my saws.

 

[Mastermind]

You make it seem easy and I've got my South Bend lathe all set up. Maybe I should? Maybe I should stick to woodworking!!! :msp_unsure:

And let you do my saws.

Are you using a South Bend for wood?

 

[Termite]

Are you using a South Bend for wood?

No, I have a fairly well equipped wood shop. I just got the South Bend because it was such a good buy.

 

[Mastermind]

A few more pics......



These rubber seals have a lube of sorts on them when we pull em apart. So, I use this stuff to prevent corrosion in the future. Glock37 sent me this stuff......I use it for installing fuel and vent lines too. Thanks Mike!!!!!



I've never found a set of tee handles that have security torx tips, so I made this with a 1/4" nut driver, a bit, and some heat shrink tubing.....



These screws ain't really meant to be removed and reinstalled.......I feel better using some red Loctite on em.

 

[blsnelling]

So, let's talk about timing numbers for a minute.

Stock:

Squish: .034
Ex: 105°
Tr: 116.5°
Stratos: 71°
In: 73°

Ported:

Squish: .020
Ex: 105°
Tr: 116°
Stratos: 75°
In: 78.5°

Have you tried more blowdown, ending up with 346 like numbers? Just pointing out the obvious, but you could try that by simply not raising the transfers back up after the machine work.

BTW, very pretty work!

 

[Mastermind]

Have you tried more blowdown, ending up with 346 like numbers? Just pointing out the obvious, but you could try that by simply not raising the transfers back up after the machine work.

BTW, very pretty work!

That would be a bad move on a strato engine.......remember, it's just fresh air that's coming in when the transfers first open.

 

[Hedgerow]

That would be a bad move on a strato engine.......remember, it's just fresh air that's coming in when the transfers first open.

Does the 550 have case stuffers?

 

[Mastermind]

Does the 550 have case stuffers?

Sir Yes Sir

 

[blsnelling]

That would be a bad move on a strato engine.......remember, it's just fresh air that's coming in when the transfers first open.

It helps make more power on other stratos.