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Mesa Balancing Racing Engines Our cylinder heads From the Inside Out

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Old 08-24-2017, 08:27 AM
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So, the standard height is usually 1.88. I assume the extra .100 is a result of alum heads and +.100 stem lengths?
That is a good assumption but here is were it gets tricky and also why I tell guys not to buy assembled heads. The answer would be yes if we were using a GM cylinder head but most aftermarket heads use an oversize stem to arrive at the original installed height so therefore these heads have a .150 long intake and .200 long exhaust that was the reason i said that the heights were not so close by mistake. We use a simple method take a std. length GM valve measure the height you have and add what you need to get to the height you want. The question is do you think the seller is always going to take the time to measure there are two answers the good manufacturers yes the guys selling mail order parts are going to put together and add shims to the springs to make up the pressure or add +or - locks to suit.
P.S. This has been done for years to achieve what you want in the valve and spring assembly,but when you want a quality piece you measure and use what you need the first time therefore giving the customer what he deserves a top quality component. Thanks for the reply Laz
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Old 08-24-2017, 09:51 AM
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So most aftermarket heads have a longer distance from valve seat to bottom of valve spring? Or do they use the oem length as the standard?
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Old 08-25-2017, 07:12 AM
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So most aftermarket heads have a longer distance from valve seat to bottom of valve spring? Or do they use the oem length as the standard?
Ok that's a great question the distance is not always longer but in most cases in the aftermarket heads it is and yes the standard of the industry is were it all started from the standard GM valve length. As you can see valve trane problems are easy to solve especially if you start from the beginning from the seat of the valve up towards the rocker.
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Old 08-25-2017, 11:08 AM
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You got banned? I leave for a while and miss everything. I haven't been posting much past few months. Hopefully everyone is getting along better without me stirring the pot !
We don't come here to get along, we're here to be entertained! Thanks for leaving us dad, you said that you were just going out for a pack of smokes,,,lol

Laz, thanks for all adding some gearhead porn! It's always great to have a major player participate here. It lets the shade tree hacks as myself understand how we have been doing everything wrong.
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Old 08-25-2017, 02:55 PM
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We don't come here to get along, we're here to be entertained! Thanks for leaving us dad, you said that you were just going out for a pack of smokes,,,lol

Laz, thanks for all adding some gearhead porn! It's always great to have a major player participate here. It lets the shade tree hacks as myself understand how we have been doing everything wrong.
Listen there's alot of sharp as a whip shade tree cookies here that really know their stuff too. That's why it's always been one of my favorite sites.
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Old 09-14-2017, 11:06 AM
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Finished porting the first set of heads today and wanted to show some new pics before we send to hard coat anodize tomorrow. Please note all intake as well as exhaust guides are removed for the porting work to be able to reach the guide bosses without grinding the guides and for the most room possible to work. It's more work but leaves a better finished final product.




Finished chambers for volume and shape




Finished intake ports for cross sectional size and port volume



Finished exhaust port
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Old 09-14-2017, 11:46 AM
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Engine porn! Oh my blood pressure!! Seriously beautiful,work. Makes me wanna go to the garage, grab my 088's and start pretending...
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Old 09-14-2017, 02:13 PM
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Engine porn! Oh my blood pressure!! Seriously beautiful,work. Makes me wanna go to the garage, grab my 088's and start pretending...
You're not pretending if you're enjoying what your doing start grinding and testing that's what keeps us from going insane.
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Old 09-14-2017, 02:43 PM
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No, but I am pretending I am gonna get these kind of results...
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Old 09-14-2017, 03:51 PM
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What level membership u gotta buy? Neither gold nor platinum specifies post attachments
Any paid membership can upload pics directly to OSO and the pics will remain forever.
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