Plenty of clearance, but it's always safe to check. Glad you put this out. Some of these camshafts available nowdays can really eat up that clearance. I've got one of those NR racing "cheater" cams where the lobes are darn near square. Took a ton of clearancing on the block just to get it to fit. Piston to valve is around .080 which is still safe.
I'm going to try more advanced builds so I'm trying to learn some of the techniques that old school professionals use. The whole part with the hemi valves being at an angle and closer was a revelation to me! I get excited about learning this stuff!!
@@fatbuddycat maybe do some cyl head porting vids? Wish I had a way at home to make some kind of flowbench for testing. Porting and valve work would be great topics to cover
@@williamstamper442 I'm going to be doing my videos a little differently. I'm trying really hard to concentrate on 1 thing at a time. I will 💯 do one on porting by itself, that's a great idea!
With a flat top piston there is an easier way to check this without clay. Lay a straight edge across the chamber and measure between it and the valve at tdc open spec. Also you should check the spark plug this same way. I have a Tilly head I milled .020” that I have to shim the plug so it won’t hit the piston.
Thanks! I just learned the method myself. It was fun just learning how to do this to better understand the relationship betw.een the valves and piston.
Im running a hemi head on a 236 stroker engine. 58mm crank, 6270 billet rod, 72mm flat top ceramic coated piston, titanium lifters, 6mm aluminum fat rods, 320 brown box cam, 29/26 hardened stainless steel valves, 37/50 dual spring valve springs, 1.2 roller rockers, 10,000 rpm coil, billet flywheel, NGK plug, amr300 supercharger, 6 sigma nitrous kit. My mechanic says my valves and piston should have around .040 with a head gasket. But he also said to measure without the head gasket first. Use play-doh to get my results. He said if it doesn't clear, then I'd have to shave some off my piston. I'm using this engine for drag racing use
@fatbuddycat well I'm hoping I don't have to shave it. Plus it's ceramic coated too. Not sure if that would suit me or not. I'd prefer not to cut it, but if I have to I'll just buy a flat top piston with the 2 relief valve imprints on the piston
@fatbuddycat I'm really hoping to get this engine done soon. Been working on it forever seems like. I was gonna put it on a mini bike, but I also have an older John Deere XL175 mower frame I also want to put it on. Build up either a dragster mower, or a bad ass little pulling mower for the small tractor pulls we have next door
@fatbuddycat I've been working on this project for almost a yr. I have a modified 212 I started, but took it apart somewhat lol. I've been working on that one for 8 yrs lol. But I wanted a stroker engine so now I have one lol. Just waiting on my head from the machine shop to get done. So I can do my clearance. Hoping I won't have to shave my piston lol
@@fatbuddycat 1.3 add about 30% so if u have a .265 lift cam should put u around .344 lift and put ur piston to valve clearance around .145ish. As always double check everything I make no promises!
I wasn't tight enough to be concerned. It's an easy way to see where you're at if you use higher lift cams, ratio Rockers or get to milling the head down. Hemi heads also bring the valves closer to the piston.
![[MV] A leap of faith...ความเชื่อใจครั้งสุดท้าย (From "Petrichor the series")](http://i.ytimg.com/vi/U1piZH2CNXA/mqdefault.jpg)
That engine will be a smooth running power house!!
I hope so. At the very least I'll have a better understanding of what's going on inside!
Plenty of clearance, but it's always safe to check. Glad you put this out. Some of these camshafts available nowdays can really eat up that clearance.
I've got one of those NR racing "cheater" cams where the lobes are darn near square. Took a ton of clearancing on the block just to get it to fit. Piston to valve is around .080 which is still safe.
I'm going to try more advanced builds so I'm trying to learn some of the techniques that old school professionals use. The whole part with the hemi valves being at an angle and closer was a revelation to me! I get excited about learning this stuff!!
@@fatbuddycat maybe do some cyl head porting vids? Wish I had a way at home to make some kind of flowbench for testing. Porting and valve work would be great topics to cover
@@williamstamper442 I'm going to be doing my videos a little differently. I'm trying really hard to concentrate on 1 thing at a time. I will 💯 do one on porting by itself, that's a great idea!
I like the play doh method you did. That works great. I'll see you on the next one Buddy 🔧👍
Its my first time trying it. I learned a lot about the valves and where they are in relation to the piston. I always thought they came closer!
@@fatbuddycat great idea to check. Especially a hemi head
With a flat top piston there is an easier way to check this without clay. Lay a straight edge across the chamber and measure between it and the valve at tdc open spec. Also you should check the spark plug this same way. I have a Tilly head I milled .020” that I have to shim the plug so it won’t hit the piston.
Oh man!! I love that!! Someone told me to get a bridge gauge of sorts that lays across the cylinder and measures down to the piston too.
@@fatbuddycat yes did you search for the deck bridge yet? Makes it real easy and accurate to check piston to deck clearance.
@@fatbuddycat yes. I have a dial gauge setup for that. Makes very quick work.
Oh boy, this is what it has come to? I'm just going to eyeballs it from now on😊.
It still runs.....🤷♂️
I think you just wanted to play with some Play Doh LOL! Seriously though, excellent work FBC. Spot on video to help guys out with this stuff!
Thanks! I just learned the method myself. It was fun just learning how to do this to better understand the relationship betw.een the valves and piston.
Im running a hemi head on a 236 stroker engine. 58mm crank, 6270 billet rod, 72mm flat top ceramic coated piston, titanium lifters, 6mm aluminum fat rods, 320 brown box cam, 29/26 hardened stainless steel valves, 37/50 dual spring valve springs, 1.2 roller rockers, 10,000 rpm coil, billet flywheel, NGK plug, amr300 supercharger, 6 sigma nitrous kit. My mechanic says my valves and piston should have around .040 with a head gasket. But he also said to measure without the head gasket first. Use play-doh to get my results. He said if it doesn't clear, then I'd have to shave some off my piston. I'm using this engine for drag racing use
@markharris1473 I've heard of piston shaving, I've yet to do it but I like the concept.
@fatbuddycat well I'm hoping I don't have to shave it. Plus it's ceramic coated too. Not sure if that would suit me or not. I'd prefer not to cut it, but if I have to I'll just buy a flat top piston with the 2 relief valve imprints on the piston
@fatbuddycat I'm really hoping to get this engine done soon. Been working on it forever seems like. I was gonna put it on a mini bike, but I also have an older John Deere XL175 mower frame I also want to put it on. Build up either a dragster mower, or a bad ass little pulling mower for the small tractor pulls we have next door
@markharris1473 I still haven't finished a 224 I started like a year ago. Just need Pushrods and something simple to put it on.
@fatbuddycat I've been working on this project for almost a yr. I have a modified 212 I started, but took it apart somewhat lol. I've been working on that one for 8 yrs lol. But I wanted a stroker engine so now I have one lol. Just waiting on my head from the machine shop to get done. So I can do my clearance. Hoping I won't have to shave my piston lol
That caliper was reading .224 not .124 time for some ratio rockers!
Never tried those but I heard they add lift!
@@fatbuddycat 1.3 add about 30% so if u have a .265 lift cam should put u around .344 lift and put ur piston to valve clearance around .145ish. As always double check everything I make no promises!
About your playdowe system, I don't know about that.
I wasn't tight enough to be concerned. It's an easy way to see where you're at if you use higher lift cams, ratio Rockers or get to milling the head down. Hemi heads also bring the valves closer to the piston.
I just checked mine a few minutes ago. I have 2.2mm from valves to piston. Is that good?
@@markharris1473 that's like 86 thousandths.
@fatbuddycat is that good clearance? .086? Or 86 thousandths
looks like you have all kinds of room
Lol I guess!! I always pictured the valves coming down more. I learned a lot from this and it really put a few things into better perspective.