Thanks Rod! Very nice visual demonstration of what porting is all about. It is very helpful to understand the importance and purpose of air/fuel flow in and out of the combustion chambers.
Good job ,wish you would have shown your finished head next the stock head. That way we could know where the starting point is and where we are working towards . But i learned alot thanks . What part of Tennessee are you in .am in Murfreesboro
Nice job with the porting. I note that in all the videos I have watched, the presenter has not physically bolted up the exhaust flanges to the relevant ports using Prussian Blue or Bearing Blue, then unbolt to confirm the areas to be removed for a near perfect match. Maybe your gasket match was good enough. Well done anyway. Cheers
What model Mawalkie die grinder is that your using? I like the idea of using battery power instead of air too. Your link doesn't work from my location.
@@jedschleisner8960 if it was mine, I would rebuild the entire engine! Most engines when top end only are rebuilt they wouldn’t last long after the repair.
Rods VW Garage yes your probably right. There seems to be no end play. I’m thinking the car sat for a long time and some one got it running. It may have been stuck. Blow by is incredible. I call it the bondo queen, mosquito fogger. No rust just hit in the front, pulled out and bondoed thick. The semifores are bondoed in.
Not sure I didn’t do a flow test on them, sorry I didn’t have your answer. But Remember this is only to help pass a bit more air, because you are always restricted by the size of the valves.
@@RodsVWGarage no no not flow, combustion chamber volume.... did you CC the heads before and after the porting work? (pure curiosity) If the chambers were 55cc before the porting and 60cc afterward that's enough to turn a 8:1 compression ratio into 7.5:1 and then they need to be flycut etc.
@@Figment078 porting a head doesn’t affect the compression ratio in a chamber my friend! Explain how porting a head changes the volumetric ratio on a combustion chamber? If that statement was true, everyone would do it in their engines! The compression will only change if you make the piston either closer or further from the head.
Cutting away material in the head combustion chamber opens up CC volume, creating more space, for combustion. This lowers compression ratio. You should perform a CC test on the heads in the combustion chamber before the removal of material and than after to see what your CC is to calculate proper losses and new compression ratios. These will always be lower if you are removing material. I’m not an engine builder, just an IT guy with some garage knowledge.
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Thanks Rod! Very nice visual demonstration of what porting is all about. It is very helpful to understand the importance and purpose of air/fuel flow in and out of the combustion chambers.
Absolutely air/fuel is one of the most important things in a combustion engine!
Nice work lil brother ❤
Good job ,wish you would have shown your finished head next the stock head. That way we could know where the starting point is and where we are working towards . But i learned alot thanks . What part of Tennessee are you in .am in Murfreesboro
Sorry about that! I’m in Clarksville, I do it to most of the heads I work on better flow more hp.
Nice job with the porting. I note that in all the videos I have watched, the presenter has not physically bolted up the exhaust flanges to the relevant ports using Prussian Blue or Bearing Blue, then unbolt to confirm the areas to be removed for a near perfect match. Maybe your gasket match was good enough. Well done anyway. Cheers
I use the gasket to port both sides (head and flange) also I try to not be bigger than the actual valve.
What model Mawalkie die grinder is that your using? I like the idea of using battery power instead of air too. Your link doesn't work from my location.
www.amazon.com/dp/B07XZMMD1V?ref_=cm_sw_r_cp_ud_dp_9T8JBBQ3TT4288YC6BGE
Gracias por compartir tus conocimientos
De nada!
Do you have close up pictures you can post on your Facebook? I am about to port some heads and I like your approach.
I’ll look to see if I got some! I’m sure I don’t because I posted everything that day and deleted the content
Thanks, I wonder how much this would help on a stock 36hp?
I did it on my other 57 with the 36hp with a 110 Engle cam and worked well.
Rods VW Garage I have to do the upper end of my 57 soon
@@jedschleisner8960 if it was mine, I would rebuild the entire engine! Most engines when top end only are rebuilt they wouldn’t last long after the repair.
Rods VW Garage yes your probably right. There seems to be no end play. I’m thinking the car sat for a long time and some one got it running. It may have been stuck. Blow by is incredible. I call it the bondo queen, mosquito fogger. No rust just hit in the front, pulled out and bondoed thick. The semifores are bondoed in.
The pic on the vid looked lkke to owls looking at each other
Hahahaha
how much did that smoothing of the ridge in the combustion chamber increase the chamber volume?
Not sure I didn’t do a flow test on them, sorry I didn’t have your answer. But Remember this is only to help pass a bit more air, because you are always restricted by the size of the valves.
@@RodsVWGarage no no not flow, combustion chamber volume.... did you CC the heads before and after the porting work? (pure curiosity) If the chambers were 55cc before the porting and 60cc afterward that's enough to turn a 8:1 compression ratio into 7.5:1 and then they need to be flycut etc.
@@Figment078 porting a head doesn’t affect the compression ratio in a chamber my friend! Explain how porting a head changes the volumetric ratio on a combustion chamber? If that statement was true, everyone would do it in their engines! The compression will only change if you make the piston either closer or further from the head.
I'm glad you asked this. Early in the video I was feeling that this guy is relatively clueless, and his answers to you confirmed it.
Cutting away material in the head combustion chamber opens up CC volume, creating more space, for combustion. This lowers compression ratio. You should perform a CC test on the heads in the combustion chamber before the removal of material and than after to see what your CC is to calculate proper losses and new compression ratios. These will always be lower if you are removing material.
I’m not an engine builder, just an IT guy with some garage knowledge.
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