Powerland 420cc GAB 2.0

[bob58o]

Well I officially made my first GoPowerSports purchase. Thanks for the discount.

I decided to break the engine in with the governor still in. This will be an extended break in period after the initial break in.
At least a full tank of gas or two or three with the engine on the working buggy before I pull the governor.


So this means I'll be using the stock carb for a while. I got the 420cc Air Filter Kit.
http://www.gopowersports.com/predator-301-420-performance-kit/
comes with PreFilter, filter, filter adapter, choke bracket, and main jet.

I went up two sizes in the pilot jet with drill bits.

 

[bob58o]

The milled head came back with an indexing washer. Or maybe just a spacer to make up the difference of the milling. Anyway I took off the crush washer, slid the indexing washer up, then put the crush washer back on. This way the crush washer sits on the threaded hole, as intended.

When torqued down, the spark plug will point towards the exhaust valve.

 

[bob58o]

60 grit sandpaper and my finger.
No more mistake.
????
Looks better.
Now need to get back to 320 grit.

The old...

 

[bob58o]

The New... still 60 grit.

 

[bob58o]

One

 

[bob58o]

At...

 

[bob58o]

A ....

 

[bob58o]

Time...


320 grit finishing buff.
Harbor Freight Chicago Electric Rotary tool.

I like the electric as much as the air die grinder.

 

[bob58o]

Hopefully the valve surfaces will be ok????

 

[bob58o]

PCV Tube from valve cover was cut to a length of about 1.75".
3/16" Fuel Vapor Line (PCV/EEC) fits inside the stock tube nice and snug.

The 3/16" Fuel Vapor line fits nicely inside the Breather Filter I bought.

Need to figure out where it will go, then I can cut to length.

 

[Hellion]

When torqued down, the spark plug will point towards the exhaust valve.

Don't you want the spark plug pointing at the intake valve instead?

Why all the combustion chamber polishing (not that there's anything wrong with that)??

 

[bob58o]

Don't you want the spark plug pointing at the intake valve instead?

Why all the combustion chamber polishing (not that there's anything wrong with that)??

Half of what I've read said point it at the exhaust. Half said the intake.

As long as it fires towards the open side of the chamber I'm happy.


Just from one site....
http://www.fordmuscle.com/archives/2000/07/indexplugs/


The ideal position of the plug is such that the gap is facing towards the valves, preferably the exhaust valve.

The object of indexing is to avoid this problem: when this plug fires the spark is directed towards the chamber wall, rather than the center of the combustion chamber.

---------- Post added at 10:35 AM ---------- Previous post was at 10:30 AM ----------

Also says towards exhaust.
https://www.youtube.com/watch?v=Ys4GnIk_YC0

---------- Post added at 10:40 AM ---------- Previous post was at 10:35 AM ----------

Says intake....
http://www.enginelabs.com/news/getting-the-most-out-of-your-ignition-spark-plug-indexing-101/

 

[bob58o]

The polishing happened cause when I was going to put my head back on I saw this.

I drew a square around the flaw. lol
I looks like the guy that cut my valve seats went in with a cutter too big at first, said "Oh shoot!", then backed it out and cut with the correct size.

I'm not really sure what happened, but I wanted to get out the extra ridge that somehow got cut into my combustion chamber. The extra lip went around 35-40% of the circumference of the exhaust valve.

Maybe it was an attempt at unshrouding the valve.

I needed a reason to buy the Chicago Electric Rotary Tool. LOL
Now maybe I have a reason to hunt down a company that does thermal barrier Ceramic Coatings for performance Engine parts. Looks like I may have compromised the Black Nitride Coating I'm guessing was on the valves.

 

[Hellion]

My theory on polishing the combustion chamber is so that there's less 'tooth' for carbon deposits to cling to, also making subsequent carbon cleaning/scraping easier.

The latter is part of regular maintenance but who among us practices it?

 

[bob58o]

My theory on polishing the combustion chamber is so that there's less 'tooth' for carbon deposits to cling to, also making subsequent carbon cleaning/scraping easier.

The latter is part of regular maintenance but who among us practices it?

I would have polished it anyway. At least to 320 grit.
On the 212cc I did, the question got raised and of course, no simple answer. Some like golf ball like dimples. Some are afraid of the fuel falling out of suspension.

I settled on 80 grit for intake, 320 for chamber, and exhaust as much as I can or care to.

 

[Randy H]

If nothing else that ridge especially in combination with a high compression, timing advanced motor, would be a great starting point for preignition.

Did VegasCarts do that?

 

[bob58o]

If nothing else that ridge especially in combination with a high compression, timing advanced motor, would be a great starting point for preignition.

Did VegasCarts do that?

Howards outdoor power equipment.
I cannot imagine how I would have done that. I did not see it right away, however. I think it will be fine now.

---------- Post added at 04:39 AM ---------- Previous post was at 04:37 AM ----------

My copper gasket will get coated with Permatex Copper Spray-A-Gasket Hi-Temp Sealant.

First time using a copper gasket. First time using this copper spray stuff.

https://www.youtube.com/watch?v=BdkpnygD790

---------- Post added at 04:45 AM ---------- Previous post was at 04:39 AM ----------

Taking the valves out one more time to clean the head/valves. I left them in while smoothing and polishing the chamber. I was trying to protect the seats and didn't have extra valves to use while doing so. Sometime in the next 12 hrs, I'll either have my head torqued on or I'll have a much bigger issue because I ripped the threads out of the block.

---------- Post added at 04:50 AM ---------- Previous post was at 04:45 AM ----------

Someone singing the praises of copper gaskets...
Makes me feel a little better. I'm an easy sell. LOL

http://scegaskets.com/wp_super_faq/given-the-choices-why-would-one-use-a-copper-head-gasket/

 

[bob58o]

I trimmed this heat shield looking thing.
With the milling, it would have gotten in the way.
It was bent and kind of wrapped around the bottom fin.
The gasket surface on the head is almost flush with the bottom of the bottom fin in some places.

 

[Randy H]

Good luck
https://m.youtube.com/watch?v=SmHeP9Sve48
If it works for then I won't spend the extra cash on studs.

 

[bob58o]

Shirley You can't be serious. I am serious and don't call me Shirley.