Hybrid Build

[drf255]

I have a 460 cylinder with bridge ports and what was on my hybrid and im porting another 460 cylinder to try both on a regular 460 crankcase. The 460 cylinder im workin on right now is blowing 266psi!!

Someone cut the squish and not raise the exhaust?

How does one get to 266?

I've heard 220 is the max u want on a saw that size.

Edit:I see above.

 

[redfin]

Well I kinda miscalculated cutting squish u see

Hopefully the base doesnt crack out with that much off it.

 

[drf255]

Sorry for the hijack...

Do any of my saw modding brothers here have any fine metal mesh 026 air filters they can spare?

 

[KG441c]

Hopefully the base doesnt crack out with that much off it.

Base is still @ .215

 

[KG441c]

Someone cut the squish and not raise the exhaust?

How does one get to 266?

I've heard 220 is the max u want on a saw that size.

Edit:I see above.

Yep. With a gasket back in its still at 220 but the exhaust hasnt been raised. #s sit with gasket in at 107/124/81. Think ill try 102/118/81?

 

[PA Dan]

Ok I got my squish problem figured out! Mike suggested I sand the squish band with an old piston. Well Glock37 had one so I stopped over and picked it up. I started with 80 grit and finished with 120 because it was the highest grit I had at home. After a couple paper changes I took a measurement and was between .016 & .017. So I ran a couple more 80 grit paper changes then finished with the 120. Here's how it looked.

and here's what I ended up with!

 

[drf255]

You may only really be at .016. I'd take a bit more, but that's me.

Chamber beautiful.

 

[redfin]

Looks good Dan. How thick is your solder?

 

[PA Dan]

Looks good Dan. How thick is your solder?

Solder is .031 but I tapped it to about .025 before I set it on the piston. I might take a couple more thousands off before I assemble the top end.

 

[dall]

i think crushing the solder more would give it to much width and give false readings correct me if im wrong

 

[PA Dan]

Hmm didnt think about that. Ill look for thinner solder tomorrow. Maybe I can slice it in half with an xacto and try again? Ill see if feeler gauages fit through the spark plug hole?

 

[blsnelling]

.017" is plenty squish on this saw.

 

[PA Dan]

.017" is plenty squish on this saw.

So you think im ok where im at then?

 

[redfin]

Ive been using .021 from Radio Shack Dan. I would get some thinner solder and recheck.

 

[PA Dan]

Thanks Jon thats what ill do!

 

[Deets066]

Thanks Jon thats what ill do!

Run it

 

[PA Dan]

Got some .022 solder today and checked again. It measured a couple thou less than yesterday. I ran a couple more 120 grit papers through it and am sitting right between .018 and .019. So im happy with that and have everything cleaned and ready to go together!

 

[Adirondackstihl]

Okay.....
Here's my spacer.
All cut by hand.

 

[Canadian farm boy]

That looks great. Looks very strong. Are you gonna paint it or leave it raw aluminum?

 

[Adirondackstihl]

That looks great. Looks very strong. Are you gonna paint it or leave it raw aluminum?

Leave it bare