427 SBF

BOSS#1540 said:
Yeah, but look how ugly yer intakes are, and headers on the sbc, bbc headers are tolerable at best 😏
Click to expand...
My intake AND headers are sexy!! :D

vdA45XFm.jpg
 
I took off the turning handle and welded a nut on it and use impact. Worked good for me, but I have only needed to run singles so far. I can see how doubles would suck.
 
This harbor freight thing isn't much better. The handle is too short to get any leverage and my carpal tunnel sure as fuck isn't letting me clamp the fucker

 
89 Fox 427 said:
The first .100 of lift takes roughly 49.5 degrees to get there (with .100 lift coming 4.5* ATDC)

The next .100 takes 24.5*

Then 26.5*

That says something about the ramp rate on the cam. And my thoughts would be taking longer to get the intake valve open might be a good thing, as the faster it cracks open, the more potential exhaust gas you'll be pushing back into the intake as the piston is coming up?

I might be completely off base with that if anyone with more understanding wants to chime in.
Click to expand...

BOSS#1540 said:
You can put it on a graph to help.
Scavenging is your friend.
Click to expand...

I'd say the faster you can open the intake the better.
You just don't want to beat up your valvetrain by whaling it open too fast.
I think most asymmetrical street cams open the valve faster than they shut it, to keep the closing a little softer.
You could have some more fun by checking the closing side.
I'd be interested to hear the numbers.

BOSS boy has it correct, overlap ain't just to make the cam sound cool...
 
Mike Beck said:
Carb-style intakes look fine. My headers, well THEY SUCK! I absolutely hate the design of the SBC exhaust ports, JUNK! BBC are fine. LS are fine. And the rockers that are crooked drives me nuts. Such a dumb design. Pushrod, stud, and valve should all be inline. I have to use an offset rocker and lifter in my engine to get this shit right.
Click to expand...
Just 🤢🤮

😆😅
Chevy crooked do suck, 351c canted 😘👍😎
 
Oh yeah, something to keep in mind...

The exhaust valve opens at a point where there's still cylinder pressure, so the first portion of the exhaust event isn't piston motivated.
I can't remember the numbers, but a fair percentage is evacuated by "blowdown".
 
Going to try and make something even though I don't have my welder or any extra steel laying around. Nut, washer, and my $2 harbor freight prybar, cut a slot big enough to fit over the rocker stud and pray.

Going to get pizza first and relax a little. Gonna have a stroke with the amount of stress this shit is putting me through. Not that kinda stroke compnut, just relax
 
Not sure if you've ran into this before, but when you're using a spring compressor other than the big c clamp type, the valve may just go down with the spring because the tapered locks are holding tight to the retainer. May have to put a socket on the retainer and give a smack with a hammer. If you're going the prybar with a slot route, have a magnet ready to grab the locks out of there.

As mentioned, you may actually be able to remove the keepers with just a hammer and a socket, but I don't do that to shit I care about. Plus you will still need something to be able to reassemble it.
 
Boosted Bullet said:
Not sure if you've ran into this before, but when you're using a spring compressor other than the big c clamp type, the valve may just go down with the spring because the tapered locks are holding tight to the retainer. May have to put a socket on the retainer and give a smack with a hammer. If you're going the prybar with a slot route, have a magnet ready to grab the locks out of there.

As mentioned, you may actually be able to remove the keepers with just a hammer and a socket, but I don't do that to shit I care about. Plus you will still need something to be able to reassemble it.
Click to expand...
Yepper. Keepers can get pinched. I wouldn't do it with anything you want to reuse.
I tap the retainer in a circle pattern with a nylon hammer if keepers are stuck. You can actually hear it make a different sound when they break free.
 
When I took my afr's apart I gave them a tap to release them so I'm familiar with the concept
 
Got half the retainer out and wouldn't you know it, I release tension and now the other half is locked under the spring. This is fucking insane
 
You must log in or register to reply here.
Back
Top