Author Topic: The Hugger goes ZL-1....  (Read 4236 times)

cook_dw

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Re: The Hugger goes ZL-1....
« Reply #45 on: July 14, 2016, 05:54:10 PM »
Hey you are rich in knowledge Darrell. What are you coating the tops of the pistons and skirts with, and why is it beneficial?

Unforunately Austin, interweb babble doesnt pay the bills..   :-[

Cerakote is the name of the company and they are mainly known for ceramic coatings in the gun arena.  The top of the piston is a coating called piston coat which it helps with the ignition of the heat being dispersed across the whole piston and reduces and in most cases eliminates hot spots or essentially its a thermal barrier.  Very beneficial in high compression and forced induced engines.  The skirts have whats called Micro Slick coating which is a dry friction reducing coating.  Can be used in many different applications.  Next engine I build I want to try some ideas with this coating in other key areas of the engine to free up drag and increase horsepower..  Am I racing in a class?  No but it is more of a to say I did and can do it and it works.  Also have used other coatings from Cerakote for the headers, intakes and other items.  So far it is holding up very well.

http://www.cerakotehightemp.com/






 
Darrell Cook
1967 LeMans Blue SS/RS L35 clone, fake or whatever you wanna call it.  Its not original.. 
1968 Rallye Green SS L78 - unrestored original
1968 Matador Camaro 302

cook_dw

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Re: The Hugger goes ZL-1....
« Reply #46 on: July 14, 2016, 05:57:00 PM »
Interesting info there, Darrel!
Do you mean the sharp edges of the domes or ...? And how much do you need to knock of?

Yes off the dome.  It doesnt take much to remove them..  I use a scotch brite pad most of the time.  But if you are afraid of damaging the piston then just ask whoever is doing the machine work on your engine to look them over and a good machine guy will know and do it anyways.
Darrell Cook
1967 LeMans Blue SS/RS L35 clone, fake or whatever you wanna call it.  Its not original.. 
1968 Rallye Green SS L78 - unrestored original
1968 Matador Camaro 302

firstgenaddict

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Re: The Hugger goes ZL-1....
« Reply #47 on: July 21, 2016, 10:30:27 AM »
Like Darrell stated the tops of the domes should be "softened" in order to minimize points which can cause pre-ignition. 

before the Coatings came about we glass beaded the piston tops (taped the ring lands with duct tape).
The glass beading gave a dull textured surface on which a nice even coat of carbon would deposit-- giving an insulation, which protected the piston tops.

The D port 077 heads look like the exhaust side of Brodix race heads of the 80's and 90's.

They flow much better on the exhaust than the earlier heads and the exhaust is where most heads need help.
James
Collectin' Camaro's since "Only Rednecks drove them"
 
Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

cook_dw

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Re: The Hugger goes ZL-1....
« Reply #48 on: July 21, 2016, 11:25:29 AM »
They flow much better on the exhaust than the earlier heads and the exhaust is where most heads need help.

Much harder to get air to flow through a short hard 90° turn much less having to come out of and around a valve head.  Also why camshafts designed staggered offset on dura & lift..  Its all in the combo and what you are trying to accomplish.  Excellent point James.

Treat engines like a big ole air pump..  Dont worry about the fuel side as things..  Figuring out how to get more air in and out are the keys as well how quickly can you get it done..  All this engine talk has me wanting to build another race engine...  Its been a while.  I need to be rich.
Darrell Cook
1967 LeMans Blue SS/RS L35 clone, fake or whatever you wanna call it.  Its not original.. 
1968 Rallye Green SS L78 - unrestored original
1968 Matador Camaro 302

hgger69

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Re: The Hugger goes ZL-1....
« Reply #49 on: July 23, 2016, 07:42:47 AM »
Thanx Darrel and James for your input, much appreciated!  :D
I'll make sure to soften the sharp edges of the domes myself before it goes to the engine shop for bore and balancing!
I like the comparison with an air pump as well, makes it easier to understand why engines work well or not! ::)
Regards,
Hakan from Sweden
1969 Camaro X44, hugger orange, 355, TH350, 4:10 12 bolt Posi, RPO Z87, black/white houndstooth, 14" steel wheels & dog dish, 02D built
www.hakansmotorsida.com