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Old 02-13-2017, 05:35 AM   #1
racesloth
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Bare LSA heads

Ordered up a set of bare LSA Heads for some home porting. Nothing too big, gasket match remove the swirl hump etc...

Then build them up with Manley sever duty valves and BTR springs.

Would appreciate guidance and pics from anyone who has done this already.

Cheers,
Dan
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Old 02-13-2017, 09:42 AM   #2
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Good luck, and good on you for doing it! I bought an extra TB so I could learn a bit of porting, and it came out great. Love to graduate to a set of heads, and it looks like a good bit more work, obviously. Love to see how you progress with it.
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Old 02-13-2017, 09:57 AM   #3
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You may want to message BO white he is the only guy doing porting on here I know of and often on other threads
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Old 02-13-2017, 10:05 AM   #4
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Quote:
Originally Posted by racesloth View Post
Ordered up a set of bare LSA Heads for some home porting. Nothing too big, gasket match remove the swirl hump etc...

Then build them up with Manley sever duty valves and BTR springs.

Would appreciate guidance and pics from anyone who has done this already.

Cheers,
Dan
While I can appreciate the want to do a little home R&D working over some castings in the garage. I can tell you the availability and time of good CNC programs make this a not worth doing thing any longer. The ports have been sorted out for various combos. You will spend more time and materials picking up airflow a little bit or possibly hurting airflow than it's worth.
Send in the heads to a outfit like us and you can get back a ready to go piece in a week or two. We have all the parts in stock to knock a set out for you.
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Old 02-14-2017, 08:48 AM   #5
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Understood, but $1000 and up for CNC porting and I ship them from the UK and Back...

I have all the tools - just need to buy some sand rolls and spend some time on them...

I am not going to do anything major - just remove that wing, and smooth/polish the ports and combustion chamber....

Part of this that I enjoy is the hobby of it. Using a casting that is better suited to boost than the stock LS3 head, assembling it myself with higher quality valvetrain components than most come with stock.

Satifaction of doing it myself. Spending fewer hours in front of the television and more hours in the garage. It is the journey too...

Dan
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Old 02-15-2017, 03:39 AM   #6
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have you ported heads befor? do a search for ported ls3 heads on google. if you dont know what your doing you can wreck the head.
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Old 02-15-2017, 06:44 AM   #7
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Yes I have ported before - but it was 351W ford stuff....

I feel I can accomplish what I am looking for not tryign to flow like a WCCH head. Just a good polish on the exhaust side. 80grit finish in the intakes, removing the flash and the swirl hump - only polishing the short turn and very minor polishing work on the comb chamber.

Main reason for new heads is the stronger roto cast head and installing better than stock valvetrain components.

Plus I can sell the LS3 stockers with the intake and fuel rails for a pretty penny in the UK...
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Old 02-15-2017, 01:21 PM   #8
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we'll definitely look into what to and not to do on a LSA head. good luck
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Old 02-15-2017, 02:06 PM   #9
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Yes I have ported before - but it was 351W ford stuff....

I feel I can accomplish what I am looking for not tryign to flow like a WCCH head. Just a good polish on the exhaust side. 80grit finish in the intakes, removing the flash and the swirl hump - only polishing the short turn and very minor polishing work on the comb chamber.

Main reason for new heads is the stronger roto cast head and installing better than stock valvetrain components.

Plus I can sell the LS3 stockers with the intake and fuel rails for a pretty penny in the UK...
I know there are a good number of pictures online of this, but would you mind taking pictures of your process? This is something I want to try as well
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Old 02-15-2017, 02:32 PM   #10
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Yep I sure will...

Here are some good vids...



This could be done to an LSA...
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Old 02-18-2017, 01:33 PM   #11
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Heads have shipped - they are on their way...
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Old 02-18-2017, 02:02 PM   #12
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Yep I sure will...

Here are some good vids...



This could be done to an LSA...
Sure, can be done to any cylinder head.
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Old 02-18-2017, 06:16 PM   #13
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I'm new to porting, so have to ask, when do you get to the point where the passages/combustion chamber are too polished, so that there isn't enough turbulence to keep the air/fuel mixture at a state of separation? That mirror polish looks great, but is it the ultimate goal?
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Old 02-18-2017, 07:11 PM   #14
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Quote:
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I'm new to porting, so have to ask, when do you get to the point where the passages/combustion chamber are too polished, so that there isn't enough turbulence to keep the air/fuel mixture at a state of separation? That mirror polish looks great, but is it the ultimate goal?
Exhaust is good with mirror polish. Intake, maybe a "rough" polish or fine grit finish.
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