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This is exactly how I understand the flow. My question is for everyone:4.The coolant flow volume that is biased to the exhaust side of the head then flows basically up and over the combustion chambers (it does not flow rear to front along the head on the exhaust side of head) where it rejoins with the smaller coolant volume coming from the holes on the intake side of the head where it does now flow along the length of head to front discharge port entering the front manifold crossover to the thermostat.
In the second pic the front bypass hose should be one or two size bigger than the rear bypass hose. The front hose must carry the flow from both the center and rear bypass outlets to accomplish fairly equal flow in the front and rear portions of the head water jackets.
This is not the case with a SBC.THe rest of what Smokey said there was just nonsense. I'm sorry but some of the things we just accepted decades ago have been proven incorrect.Geoff2 wrote: ↑Sun Dec 26, 2021 1:48 am CJ,
The term 'large' is relative. The head gasket hole size regulates flow, with holes in the head & block usually larger. The largest holes & the greatest number of holes that transfer coolant from block to head are at the rear of the block.
The only mod that Smokey did was to plug those large core holes on the valley side of the block & then drill 0.060" steam relief holes; not sure why this was really necessary because the mating holes in the gasket are already quite small.
"We also like to plug the large core openings in the deck so that the majority of the coolant must travel to the rear of the block before it is transferred up into the cyl head."
The only other mod he does for coolant routing is the Y piece I described in an earlier post
Old smokey putting up the smoke screen again!Geoff2 wrote: ↑Sun Dec 26, 2021 1:48 am CJ,
The term 'large' is relative. The head gasket hole size regulates flow, with holes in the head & block usually larger. The largest holes & the greatest number of holes that transfer coolant from block to head are at the rear of the block.
The only mod that Smokey did was to plug those large core holes on the valley side of the block & then drill 0.060" steam relief holes; not sure why this was really necessary because the mating holes in the gasket are already quite small.
"We also like to plug the large core openings in the deck so that the majority of the coolant must travel to the rear of the block before it is transferred up into the cyl head."
The only other mod he does for coolant routing is the Y piece I described in an earlier post
That he did.cjperformance wrote: ↑Sun Dec 26, 2021 2:51 amOld smokey putting up the smoke screen again!Geoff2 wrote: ↑Sun Dec 26, 2021 1:48 am CJ,
The term 'large' is relative. The head gasket hole size regulates flow, with holes in the head & block usually larger. The largest holes & the greatest number of holes that transfer coolant from block to head are at the rear of the block.
The only mod that Smokey did was to plug those large core holes on the valley side of the block & then drill 0.060" steam relief holes; not sure why this was really necessary because the mating holes in the gasket are already quite small.
"We also like to plug the large core openings in the deck so that the majority of the coolant must travel to the rear of the block before it is transferred up into the cyl head."
The only other mod he does for coolant routing is the Y piece I described in an earlier post
There should be plenty of flow there even though you are pulling water out the "rear" of the manifold.It should also be the coolest place to have the sender. You would get a "better" indication of the engines true or highest coolant temperature if the sender was at the rear of engine or near the center exhaust valves if you can get it there with your heads.MELWAY wrote: ↑Tue Dec 28, 2021 6:38 pm What are some thoughts when we fit sbc engines backwards
On a rake angle in a boat?
We feed water into front like normal and pull water out of rear of heads as that is the highest point
Most fit outs people put a blank plate over thermostats hole but still put temp gauge sensor next to thermostat
I would think there would be minimal flow in that area
This works fine on a parallel flow system as per SBC.MELWAY wrote: ↑Tue Dec 28, 2021 6:38 pm What are some thoughts when we fit sbc engines backwards
On a rake angle in a boat?
We feed water into front like normal and pull water out of rear of heads as that is the highest point
Most fit outs people put a blank plate over thermostats hole but still put temp gauge sensor next to thermostat
I would think there would be minimal flow in that area
Parallel is where coolant is entering the cylinder block then being metered up thru the head gasket in a uniform way, kind of divided across each cylinder, (there can/will be different sized holes typically larger on exhaust side, smaller on intake side) with minimal flow bias front to rear , then once in the head the coolant is directed out thru the thermostat. As per the small block chev.