Hey man, I just wanted to let you know that I tried this method of milling my Predator 212 with a hemi head (Honda clone) and it's working awesome and giving me good compression. Only thing I did different is grinded it with dry sandpaper instead of wet, seemed to work faster. Still took a while but didn't have to take it to a shop or pay someone. I appreciate this vid, bud.
So far I've taken off about 0.05" to give me a compression of 12:1 (also using a thinner gasket and +0.02" connecting rod) and it's working surprisingly well. It takes FOREVER to grind it down that far but if you've got more time than money, or you're just stingy, it works just fine.
@@mexvette8209 Probably like 2 hours to get 0.04 in off. I did actually take the head to my belt sander as well and that was MUCH faster but of course you run the risk of milling unevenly. Mine worked, though.
0.05 is 50 thou !!! 5 thou is 0.005... your measuring device is not worth a toss. you need to be 100% accurate when doing a head, you are miles out . it might be straight on the face but you have no idea if its out each side.. the finish is far too smooth, what is the gasket going to bite on ? last thing you want is super smooth finish on a head. 80 grit is about right for the finish and do it just one way...
You don't need the head rough for the gasket. If you want I can pull the head off the new BSP motor I have and show you the finish from the factory. I would put a straight edge across this head and shine light behind it to make sure it is straight all the way across. I was wondering if any one has tried this. Going to try this to an extra head.
Looking at his other vids, he's most comfortable with metric. He says 1.25 mm... I'm more concerned about results. I can think of a thousand ways to accidentally on purpose ruin an engine! So, did it actually work? I'm guessing this took off 5 or 6 cc which is pretty high compression. Any imperfections are going to cause blown head gasket.
Hi, just wanted to say this engine is heaps faster than before all the mods. I did a whole bunch of things (carby jet, ported, polished, 26lb springs, indexed plug) and although the video shows my measurements as being clumsy (at best). This engine revs to 7400 rpm and pulls well. I have a huge back sprocket (I think 74 tooth) limiting the top speed to 79kph. Imagine how fast it would go with a smaller sprocket. Would love to do the cam, flywheel, lifters, piston, and rod, but it costs too much here in Aust. Probably best next mode would be to advance the timing (free). Would love to get it over 80koh and keep the same sprocket.
Robert Giorlando Glad you updated...surprised you haven't advanced the timing. At these revs, should make a difference. Glad to see the head shaving is working.
Hey man, I just wanted to let you know that I tried this method of milling my Predator 212 with a hemi head (Honda clone) and it's working awesome and giving me good compression. Only thing I did different is grinded it with dry sandpaper instead of wet, seemed to work faster. Still took a while but didn't have to take it to a shop or pay someone. I appreciate this vid, bud.
How much did you take off? So many questions... inquiring minds want to know! ;-)
So far I've taken off about 0.05" to give me a compression of 12:1 (also using a thinner gasket and +0.02" connecting rod) and it's working surprisingly well. It takes FOREVER to grind it down that far but if you've got more time than money, or you're just stingy, it works just fine.
@@stevenn8449 how long is forever? How many hour's?
@@mexvette8209 Probably like 2 hours to get 0.04 in off. I did actually take the head to my belt sander as well and that was MUCH faster but of course you run the risk of milling unevenly. Mine worked, though.
Easiest way is to buy a .009 or .010 head gasket!
what number grit sand paper you used are recommend
how long did it take to do it
0.05 is 50 thou !!! 5 thou is 0.005... your measuring device is not worth a toss. you need to be 100% accurate when doing a head, you are miles out . it might be straight on the face but you have no idea if its out each side.. the finish is far too smooth, what is the gasket going to bite on ? last thing you want is super smooth finish on a head. 80 grit is about right for the finish and do it just one way...
You don't need the head rough for the gasket. If you want I can pull the head off the new BSP motor I have and show you the finish from the factory. I would put a straight edge across this head and shine light behind it to make sure it is straight all the way across. I was wondering if any one has tried this. Going to try this to an extra head.
Looking at his other vids, he's most comfortable with metric. He says 1.25 mm...
I'm more concerned about results. I can think of a thousand ways to accidentally on purpose ruin an engine! So, did it actually work? I'm guessing this took off 5 or 6 cc which is pretty high compression. Any imperfections are going to cause blown head gasket.
Hi, just wanted to say this engine is heaps faster than before all the mods. I did a whole bunch of things (carby jet, ported, polished, 26lb springs, indexed plug) and although the video shows my measurements as
being clumsy (at best). This engine revs to 7400 rpm and pulls well. I have a huge back sprocket (I think 74 tooth) limiting the top speed to 79kph. Imagine how fast it would go with a smaller sprocket. Would love to do the cam, flywheel, lifters, piston, and rod, but it costs too much here in Aust. Probably best next mode would be to advance the timing (free). Would love to get it over 80koh and keep the same sprocket.
Robert Giorlando Glad you updated...surprised you haven't advanced the timing. At these revs, should make a difference. Glad to see the head shaving is working.
@@rgiorlando there is a new cast aluminium flywheel available it's called the PVL flywheel.
It's $65.00 here in the states if that helps at all.