What about milling the factory head and the cylinder down to increase the compression?
one more question. What is the proper spark plug gap? I have been running a NGK-BP5HS, with a slant head and extra gasket material.
Can you turn the slant head and have the spark plug pointing to the right side over the intake port?
I know , that I have a friend who has a "80cc" slanthead and that motor runs good! it can almost keep up with mine. did you notice I said almost. but it runs really good, I have ordered a "slant head" head for a next build. to see what difference if any, my motor already runs good. just on a quest for speed! and then about plug open end pointing torward intake, would that be indexing the plug? and where do you get the correct plug washers to properly get your open end torward the intake?
Has anyone ever compared compression before and after they put on their slant head? I just got my slant head in the mail. I have a compression gauge. I think I am going to compare the stock to the slant and see how much more the slant head adds.
Has anyone ever compared compression before and after they put on their slant head? I just got my slant head in the mail. I have a compression gauge. I think I am going to compare the stock to the slant and see how much more the slant head adds.
I did the compression test and here are the results:
Normal stock Grubee Skyhawk: 95psi
Slant head from Boy Go Fast: 180psi
I expected more compression but WOW!
Seriously? That seems a bit extreme. I just got a slant head and installed it yesterday. Since the weather has not cooperated, I've only been able to go around the block. I didn't notice a difference at all. Starting seemed the same and did not notice an increase in pull up the hill. I'll play with it more when the weather clears up. I have a compression checker as well and If i recall, I was in the mid 90's with a standard head Grubee 66cc.
Seriously? That seems a bit extreme. I just got a slant head and installed it yesterday. Since the weather has not cooperated, I've only been able to go around the block. I didn't notice a difference at all. Starting seemed the same and did not notice an increase in pull up the hill. I'll play with it more when the weather clears up. I have a compression checker as well and If i recall, I was in the mid 90's with a standard head Grubee 66cc.