Corona

Another catch22
That's just one case...Mavn and others haven't said anything besides Eric W. being a porter and vendor of..
maybe your just 1 person with bad luck?
😉 2 sides of the coin

G Atsma

One case, yes, BUT the types of defects found are the ones that would be common to all such castings. There is no compensating for a bad alloy of aluminum (maybe ex-beer can stuff...)

Corona

When I hear it multiple times I'd refer to it as Fact. Same stuff said about somethings here and I go elsewhere like you know where and it's typical otb stuff used and seen that works perfectly well.

Corona

Heads having problems?
(Discontinued) RHS ls7 heads and Factory ls7 heads demand more conversion than even my BS speed pro casting.

Corona

Guys talk cylinder heads? Ask yourself this question, does the Cylinder head math Equal up to my engine combination in Math by the CSA/MCSA.

You've done that then do the Math to take the CSA/MCSA to CC in runner size then you've got your CC needed..

cnc can only do what it's programmed to do. You can know the numbers walking in to speak to your choice in Porters..the Math don't lie.. I knew the numbers before hand with Darin. From being given the Basic formula from ER.

Real Porters Hate the use of the term CC as each casting may have a different port length. CSA/MCSA tells the Entire theory of the port work done. Yeah it's simple and crazy that one can know his Own build and it's potential Choke points in the Heads and intake used. Before Hand.
High ✋

grinder11

iTrader: (1)

As a T&D maker, I saw some cast aluminum that was just pure junk. You had problems even tapping it with conventional taps. Ive seen some that was so gummy you couldn't use a NPT tap, staggered tooth, or conventional. Never had problems with 6061 billet. Cast is a different story......

SLOW SEDAN

iTrader: (13)

Didn't Mavn's drop a valve on the dyno and blow up his engine on the first pull? Other have had same experience, pay for junk, get junk!

Exactly, these heads are sold under multiple names but the casting marks and numbers are the same, as are the results.

Corona

https://ls1tech.com/forums/dynamomet...numbers-5.html

Windage tray ears?

Corona

Try another One Besides Mavn cause that didn't happen or maybe its a Older thread...since there's many others. Give another example...

Others means more than a few which = 3 or more.

Corona

https://www.yellowbullet.com/threads.../post-71519789

AFR vs A China head ....good example used. Also look at who the post is responding to. Hint: Me

If I see a problem more than a zillion times like the RHS or Factory heads, like I said I'd see it as fact..

I'm still waiting on other Promaxx Failures..

SLOW SEDAN

iTrader: (13)

It didnt happen? He got chyna boi heads from Harpers Heads, see below. Harpers, LSXceleration, DPS, numerous ebay sellers, etc all sell the same crap core under different names. You can get them under $300 bare so there is a lot of profit to be made, granted at the end users misfortune.

Corona

Hell just to prove You wrong maybe I'll ask a few non Bias Porters. Who's cnc isn't just set up for big Name aftermarket heads aka AFR, TFS, Brodix, etc..

I'd bet money some have had more YT Rocker arm issues than that of all these cheap heads and problems in the last 2 yrs...

Corona

Reasons you buy the heads as cast to eliminate the BS parts used. Aka: Valves. Springs...if it's assembled don't buy it as you don't know Who or where the valves or springs came from. We are to just use the casting not the parts.

Corona

I understand what your saying.... But a newbie buys China heads with parts.

SLOW SEDAN

iTrader: (13)

You are missing the point, if rockers are pulling out of the heads the casting material is **** as well. Spending a bunch of money on porting as well as new valves/guides/seats/springs, fixing all the rocker threads, etc takes the advantage away from budget heads.

You do you, waste your money on junk if you want. Considering you don't actually use any of these parts nor have a running vehicle to test them on you probably won't, you'll just lead others astray with nonsense remarks rather than real world results.

Corona

Do you not know of installing a Bigger stud for a better anchor? Aka I didn't use 8 mm head studs rather 7/16's.

i know Dookie happens and I get it.. but you need Hundreds not just one or two to claim a product is BS.

SLOW SEDAN

iTrader: (13)

Only a newbie buys china heads period. I won't ever buy them, and I recommended not buying them, but they were cheap at the time and a lot of other brands were out of stock. Aftermarket springs and valves were used, but the problem was deeper than the parts used with them.

SLOW SEDAN

iTrader: (13)

Shaft mount rockers were planned for use with them, but neither brand tested worked with the chyna bolt pattern, yet another limitation of them. Personally having to spend a bunch of money on fancy parts to make cheap heads work makes zero sense to me. They don't even make that much power, basic TFS will do most anyone here just as good for about the same price without all the hassles.

SLOW SEDAN

iTrader: (13)

Exactly, chinesium gives up smoke when the cylinder pressure goes up despite spending all that money on porting and parts to make them somewhat usable.

Corona

stay in a factory guys place...👍

When a stud or rocker breaks using the big name here its just normal... just like the 2 pro max heads talked about which is junk.

Anything can have a failure....