365 xt into a ported 372

[Ironworker]

I started this yesterday and after running for a while I decided to remove the gasket and replaced with yellow folder material. My squish is at .023 exhaust 99 degree and transfers at 121. I did not take stock numbers. How are these numbers as this is my first official port job. I did not check intake yet, really didn't feel like removing carb again and I broke my torq bit so the covers are still on, and I'm off to the in-laws.

 

[Ironworker]

This is what I started off with.


And after a little research I did this.

Here is what's gone, some people add when modifying, we remove.

And here is the exhaust. I did not touch the intake other than removing .030 from the piston skirt.

 

[mdavlee]

Sound good to me.

 

[weimedog]

Hoping you bring that with pics to one of the GTG's. Bet its a runner!

 

[Rx7man]

That's a good start.. it really just takes practice to get good finishes... let us know how it runs!

 

[Ironworker]

That's a good start.. it really just takes practice to get good finishes... let us know how it runs!

Ran it with a gasket but I thought it needed a little more torque, I'm thinking the tighter squish should do it.

 

[sunfish]

Tighter squish always mo better. Really noticed it on a couple 359 I did.

 

[mdavlee]

Some 066 came from the factory with .017". Tighter is better as long as it's reasonable. I wouldn't want to try to run .008"

 

[mdavlee]

See where I drew a line? You're highest point is off center a hair. If you put it in the center and make a nice arch you'll gain another degree of exhaust but it will be more symmetrical.

 

[Ironworker]

See where I drew a line? You're highest point is off center a hair. If you put it in the center and make a nice arch you'll gain another degree of exhaust but it will be more symmetrical.

View attachment 445571

Good eye, its actually not that bad when I shine a flashlight through, not enough to grind more I'm thinking 99 is high enough.

 

[mdavlee]

Pictures show stuff like that a lot more than looking at it by eye.

 

[Four Paws]

this is my first official port job.

Way to take the plunge.

 

[Ironworker]

One of the fun parts was the degree wheel, this was my first. I used a 1/2 chuck with a 3/8 bolt. The smallest spacer/bushing was only 7/16 so I had to get fancy with a little electrical tape to fatten up the shank. For the indicator I used a 1/8 welding wire, minus the flux ofcourse.

 

[Ironworker]

I plan on using yellow folder material for a gasket, does it need some sort of sealer or an adhesive and can I use moto seal.

 

[Rx7man]

My degree wheel used to be a lot more primitive than that (I just got a real one)... it was a printed paper degree wheel glued to an old CD. I still haven't improved my pointer, it's a piece of haywire.

I think that folder material should work as a gasket... I like coating my gaskets with copper never-seize so they come apart in 1 piece.

 

[Ironworker]

 

[McPherson]

Damn! She's pristine clean!!

 

[Ironworker]

Just ran it again and I'm pleased with it now, tighter squish really helped it. Hopefully I'll get a video up.

 

[Mattyo]

What you tighten squish to?

 

[Ironworker]

.021-.023