CK5
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Over head cam SBC conversion.
- Thread starter y5mgisi
- Start date
so much for accessories
I don't see a market for this. There are factory engines out there that make power you can use, if you need OHC bragging rights.
I don't see a market for this. There are factory engines out there that make power you can use, if you need OHC bragging rights.
k20
3/4 ton status
easy to change timing belt
y5mgisi
1 ton status
I like the "radiator" in the pic. Really i think its cool from a novelty standpoint.
DEMON44
Low-Tech Redneck
I don't get it? Whats the point?
less reciprocating mass than pushrod design, higher engine speeds increase power output for a given torque. The cam operates the valves directly or through a rocker arm, as opposed to overhead valve pushrod engines which have tappets, long pushrods, and rocker arms to transfer the movement of the lobes on the camshaft in the engine block to the valves in the cylinder head.
Says on site 7500 with stock valve springs
isn't NASCAR engines pushrod?
COCHEV
1/2 ton status
so is anything done to increase the oiling to the valvetrian?
DEMON44
Low-Tech Redneck
I am still a mechanic, I get the how it works part. I'm asking the why part. of changing a standard engine to ohc. How much does that kit cost........ I don't know, but WAY MORE than a it would cost to build a screaming "normal" SBC I bet.
My gravy is the Detroit Series60, OHC unit injector engine. I agree, its great. But paying a metric ****pile of money just to convert a standard pushrod engine over to it doesn't make sense to me.
Alot of peole like to do stuff like this to old styl motors. Hell i know a couple people that took the Datsun L series block, and machined it as well as the head of a nissan ka24de dual cam to make the two mate.... when the ka24de motor complete can be had for around 500 bucks.
Same could be argued about people putting a turbo on carbs, instead of going the more effecient route of fuel injection.
Some people want to do it the hard way
DEMON44
Low-Tech Redneck
I see, Just cause you can.
On the other side OHC heads are much bigger, heavier, higher COG etc. The Ford OHC V8's weigh more than an LS1 (Ford 4.6L vs Chevy 5.7L), plus the extra weight is all up top. Not to mention how much more compact a pushrod motor is.
There are lots of good things to say about an OHC motor but it isn't all rainbows
DEMON44
Low-Tech Redneck
see that pic just doesn't get me revved up like a 10-71 blower sitting up there does.
63chevyll
1/2 ton status
Besides the cost, I like it. Unique and looks cool for that random look.
Stomis
Professional Amateur
I dont see a point without moving to dual overhead so you have 4 valves per cylinder. I also dont see why you would waste the r&d on a small block.
Put dual overhead cams on a big block. Way more room for valves, more cubes make the update more justifiable since no new design motors break into the 500ci range.
That being said GM has already proved that a well designed pushrod engine trumps DOHC fanciness. The gen III gen IV trumps any other domestic v8 designed in the same time period. Ford just got back on track 10 years later with the coyote.
Put dual overhead cams on a big block. Way more room for valves, more cubes make the update more justifiable since no new design motors break into the 500ci range.
That being said GM has already proved that a well designed pushrod engine trumps DOHC fanciness. The gen III gen IV trumps any other domestic v8 designed in the same time period. Ford just got back on track 10 years later with the coyote.
On the other side OHC heads are much bigger, heavier, higher COG etc. The Ford OHC V8's weigh more than an LS1 (Ford 4.6L vs Chevy 5.7L), plus the extra weight is all up top. Not to mention how much more compact a pushrod motor is.
There are lots of good things to say about an OHC motor but it isn't all rainbows
is that the aluminum 4.6 verses Ls1 b/c im pretty sure the 4.6 is lighter. but you could take the 6.0 or 5.3 and compare that to the 5.4 with an iron block and it would be more apples to apples.
y5mgisi
1 ton status
Dont forget about the northstar motor in the caddys.
Stomis
Professional Amateur
Dont forget about the northstar motor in the caddys.
LOL imagine having to yank a 6-71 to change your starter
y5mgisi
1 ton status
Oh no. Dont tell me the starters are under the intake?
