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[Ghetto_D]

Valve Float
I was expecting shit to break, fucking valves are wobbling and spinning like crazy at those speeds,
Dont watch this video if you are epileptic!!

click on LQ to watch if video no worky


Some kid wanted me to chip his ecu on his stock LS to rev to 9K, i told him i wouldnt do it, not on a stock head. He asked me why, I told him because i didnt want him calling me the next day and asking why it shit the bed.

[patsmx5]

Cool vid. But don't think the valves are the only thing that bend and flex at high RPM and high loads. Your crank and rods are flexing and twisting too at high RPM and high loads.

[92CXyD]

The first valve and springs look like a sbf valvetrain.

[onlyflash944]

awesome vid.  wonder if they have a video of the piston rings and wheather or not they spin while the engine runs.  i've always wondered if it really matters where you put the ring gap when installing the pistons

[brine04]

Yeah that's a push rod motor not a B18c.

[BoostForLife]

awesome vid.  wonder if they have a video of the piston rings and wheather or not they spin while the engine runs.  i've always wondered if it really matters where you put the ring gap when installing the pistons

It does matter how the rings go in.

[onlyflash944]

you're saying they stay there and never spin in the cylinder?

i find that hard to believe but i still followed the proper technique the last couple of builds

[ApexSilver06MR]

i never knew honda's use roller rockers

[dvst8r]

i never knew honda's use roller rockers

You can get them if your willing to pay the $$$

[ApexSilver06MR]

i never knew honda's use roller rockers

You can get them if your willing to pay the $$$

i know that.  i was just being stupid.  who would even spend money on shit like that...

[dvst8r]

i never knew honda's use roller rockers

You can get them if your willing to pay the $$$

i know that.  i was just being stupid.  who would even spend money on shit like that...

I would.

[onlyflash944]

i never knew honda's use roller rockers

You can get them if your willing to pay the $$$

i know that.  i was just being stupid.  who would even spend money on shit like that...

I would.

i would too, if money was disposable and i was going for full blown race car

[HiProfile]

FYI the valve should spin, especially the exhaust valve. Not like a top, but enough to keep from forming hotspots. Older engines had parts that induced rotation. The other thing, some of you guys know how long some valve guides are - its the valve end & spring that is flailing, not the entire valve stem. Its partly due to the huge gap they left between the roller and valve too.

IMO that vid sucked - there was virtually no float that I saw. 1/32" of float isn't really float. When the valve keeps moving downwards, then can't keep up with the returning rocker arm, that's the really bad "float". I'll admit the end was good in that it showed valves bouncing. Thats a nice way to loose compression.

[dvst8r]

...When the valve keeps moving downwards, then can't keep up with the returning rocker arm, that's the really bad "float"...

My old man used to have a harley, we called that the rev limiter... 

[jagojon3]

Gotta love stock roller rockers in a y5 head 

[Loserkidwac]

Gotta love stock roller rockers in a y5 head 

ha ha ha yea I was gonn add that I have a honda with roller rockers

D15z1 bitches!!

[rsmith2786]

That video is somewhat deceiving.  They take a single frame every revolution.  It's not real-time.  Same for combustion videos.  This was done where I previously worked:

In Cylinder Video ( How a 4 stroke engine works )

[spoonfedcrx]

Thats an awesome vid

[92CXyD]

Thats an awesome vid

+1

Yeah this vid is sweet. ;D

Four valve per cyl. :yes: