CNC port shops opinions inside.
It means that a CNC machine does 100% of the work, not that a machine will touch 100% of every surface. If your reasoning were correct, the machine would remove material that does not need to be removed just to satisfy your understanding. Port work is about getting air speed and volume up, not removing metal needlessly.
If a head casting varies due to shift or changes year to year, it may have less metal in some places and more in others. The result is that the machine will port the same shaped port in the head but more or less clean up (pretty ridges) will be present in those areas. The absence of cleanup does not somehow mean that a port will flow less or that the machine did not pass through that area.
I am shocked that you all can't seem to grasp the obvious and somehow relate looks to performance.
If this head had been hogged out to 285cc (which is huge and way too big for many engines) it would have cleaned up everywhere. Instead, you see a small efficient port.
Yes, that is a complete CNC head. Only a CNC machine did the porting. That machine removed all the metal necessary to create the port shape you paid for.
I don't even remember if I got a flow sheet with mine. But lets be honest, does the flow sheet change the power it makes? If I did get the flow sheet today, would I go faster or make any more power than it did when dynoed without it? No, a flow sheet doesn't change one thing. The reason, flow sheets sell heads, they don't add to performance. Bragging about or comparing those numbers is irrelevant because every bench is different and the parameters of use are all different.
You really care about getting an invoice that is marked paid? I have never seen a person that wanted a completed invoice because it carried such importance. Almost odd.
You seem like a customer that can't be made happy because of your own inherent beliefs about the process. You put crazy bars/hurdles in your own way. If you were my customer or a possible future customer (TEA/WCCH), I would likely avoid your business. There are customers that simply aren't worth the hastle. Like the customer who gets an oil change and then complains about the AC not working after the work.
I don't even remember if I got a flow sheet with mine. But lets be honest, does the flow sheet change the power it makes? If I did get the flow sheet today, would I go faster or make any more power than it did when dynoed without it? No, a flow sheet doesn't change one thing. The reason, flow sheets sell heads, they don't add to performance. Bragging about or comparing those numbers is irrelevant because every bench is different and the parameters of use are all different.
You really care about getting an invoice that is marked paid? I have never seen a person that wanted a completed invoice because it carried such importance. Almost odd.
You seem like a customer that can't be made happy because of your own inherent beliefs about the process. You put crazy bars/hurdles in your own way. If you were my customer or a possible future customer (TEA/WCCH), I would likely avoid your business. There are customers that simply aren't worth the hastle. Like the customer who gets an oil change and then complains about the AC not working after the work.
As far as these heads OP, I would just put them on and see the power you make with your engine size and see if yours is relative to engines of the same size and cam selection.
I see what you are saying Tireburnin but do you think his castings are that bad off for the cnc not to touch them in certain spots? Do you think the maybe the company who ported the heads have a totally different cnc program than some of the other head companies out there?
My heads from PRC's look just like what litle88 posted the pics of his heads from LPE. So I ask is it the CNC machine or is the casting at fault here or is it just the CNC program is different from what I and litle88 posted here?
The Best V8 Stories One Small Block at Time
I would make this right or get on here and explain why my port job looks this way and not that way.....
I'll address the posts first, because regardless of the legitimacy of the thread, the questions are most certainly legitimate. If my answer or observation regarding your post is curt, I hope you won't take it personally.

Lie - There was no "pissing match." You unwisely threatened to attempt to denigrate our reputation because I refused to capitulate to your demand that we pay you 13X-14X% of your invoiced amount. When it became obvious that not only were you A. willing to lie, B. a person who thinks they can weasle out of having to pay by making threats, and C. entirely irrational and unreasonable, I told you that I would address you publically.
Continued...
The simple fact is that any time any shop is CNC porting a head that is large enough to run as cast, we have to contend with areas that will be left untouched because they are outside the bounds of the shape we are cutting into the casting. There is a core shift tolerance specified by GM, and it leaves us an area of uncertainty of approximately .080" in several directions. Smaller ports will typically exhibit 90%+ clean up being cut between 15-20cc oversize. On larger ports like the LS3/l92 family it will require a port design 20-30cc larger than stock. Unfortunately with this family of heads there are already portions that are larger than we want them to be before port work. Cutting them larger serves only to dilute the performance improvement you are actually buying when you come to us. Keep in mind, if you want a larger port for improved cleanup, even in instances where we suggest the smaller runner, then all you have to do is specify your desires and we will accommodate them. It is also important to note that Ed's castings are the oddball L92/LS3 family head - casting 5364. As the two prevalent castings are 821 and 823's, we are able to note and compensate somewhat for core shift trends as we cut more and more of them. All of this has been more thoroughly articulated to Ed over a significant accumulation of correspondence, as well as via this link to an old page I'd begun to put together years ago on the topic: http://www.advancedinduction.com/AiCleanup.html
On Flow #'s:
As has been previously stated, the entire point of CNC porting is to consistently reproduce a passage that our R&D efforts have gone into developing. The fact of the matter is that steady state flow testing is simply not representative of how the head operates in real life. Furthermore, comparing data reported on any given test apparatus must necessarily include a tolerance so large that it completely negates the usefulness of attempting to compare #'s between varying setups. We have been entirely up front and truthful in this regard, to the point of upsetting some people who still insist the public rely on arbitrary and incomparable data vs. the characteristics that actually make a difference. As previously stated, the overwhelming probability is that you will not duplicate most claimed flow #'s within a small tolerance (+/- 2cfm) due to variances in flow bench fixturing, head location, inlet type, inlet location, inlet radii, transducers present, environmental conditions, methodology, and so forth. Please understand that if racing arbitrary data like flow #'s is your priority, then we are not offended if you go to any of the multitude of head providers who cater to that desire. Our heads are designed to work on engines, not flow benches.
On Ed, Eddy B, Nasti98Z, etc.:
I realize that this is getting long, but now for the truly enlightening part. As any vendor, customer service rep, etc. with any experience knows, 95% of customers are completely normal and business proceeds normally. Of the remaining percentage perhaps there are miscommunications, issues, etc. that sour the feeling of the process itself. However, in a select few instances we become entangled with individuals who are truly special cases in the sense that they are a 1 of 500 or 1 of 1000 customer.
11/29-12/6
Initially, Ed was referred to us in this thread: https://ls1tech.com/forums/generatio...c-porting.html
You'll notice that he denigrates TEA for allegedly not calling him back here: https://ls1tech.com/forums/14179490-post12.html
Initially I interpreted this as a probable high maintenance customer - no big deal. In chatting on 11/30 I noticed that Ed seemed preoccupied with misc. bench racing topics commonly discussed in public forums. In hindsight I should have realized that when he asked the same questions repeatedly, he was actually unable to comprehend and/or accept anything contrary to his preconceived notions.
Ed was sent a .pdf quote for $1495 which included our $995 full CNC work and labor, a $500 Manley Nextek spring kit, and ~$330 in Manley valves. In a hurry making quotes that evening I added the Manley Valve line in the description, but mistakenly did not add the actual cost of the valves to the quote. While many would not honor an incorrect quote that cut half their margin out, we did, and Ed was lucky enough to fall into a 33% discount right off the top.
12/6-12/21
Ed's heads arrived and were cleaned, prepped, and CNC'd between 12/6 and 12/8. At this point we were well into the continued discussion wherein he simply could not bring himself to trust that we can provide an ideal cam grind for his application. Ed could not handle the fact that he does not have an accurate or useful understanding of engines in general, and I am not inclined to take hours to describe theory and how it is practically applied. Most of our customers are more experienced, do their research, come to us ready to trust in the overwhelming probability that we will deliver for them as we have others. Typically, throughout our conversation(s) the trust and comfort will build as questions and concerns are logically addressed. Contrary to the norm, Ed's demeanor began to slide the other way.
12/22-1/5
Finally, the gentleman who claims to be an "independently wealthy" business owner, and also to not have $395 for a camshaft sends in payment. His heads have long since been cut, and we are now three weeks past 12/1 when Ed was sent a quote/pricing for the heads. It is important that I note at this point that Ed sent in castings that he had previously burnt up on n2o. Ed never mentioned that he had managed to melt a large portion of the spark plug boss out of a chamber. Repair entails welding the area up, re-shaping that portion of the chamber, machining the spark plug bore, and re-machining the spark plug threads. In Ed's case it was a bit over 1.5hr of labor, but we'll call it $100 for simplicity's sake. We did not bill Ed for the repair, because at this point his attitude had changed so drastically that we simply did not care to deal with him further.
For those not paying attention, Ed actually received what should have been $1925 for $1495. Put another way, minus parts, Ed paid ~$570 for $995 in labor, a roughly 43% discount.
It was during this time period that I noticed Ed began to blatantly lie about correspondence. Though he did leave many text messages, he'd claim to have left messages he did not. He'd also leave a text message, and then immediately send an email railing on how he felt slighted because he "never got a response." In one case that stands out we received the "How could you not respond to me!" email ELEVEN MINUTES after he sent the text message. It doesn't take a genius to look at the level of discourse out of Ed and realize that he immediately went to work on his angry email after sending the text. Behavior consistent with the attitude of a man who will not allow himself to be made happy.
1/10-present
Ed's paranoia is coming to full song at this point, and I cannot claim I didn't expect it by now. We begin to receive more text messages. Most seem to attempt to convey the rabid assumption that he has somehow been slighted. Naturally, we explain and address all of his concerns. Everything that I have said here in regard to his heads is explained to Ed, often more than once. As his primary concern is cosmetics, our immediate response also included an offer to ship his heads back, and run the larger program with significantly improved cleanup. On a job where our margin was cut down to under $300, we offered to put another $500-700 in labor and time into it to ensure the customer is happy even though the problem is not with our work. Why did Ed not, yet again, thank the Gods for his unbelievable luck in dealing with us? If you aren't worn out yet, keep reading.
Since around 12/17 Ed's demeanor has exponentially degraded into a vile, immature, and utterly irrational mess of deluded accusations. Initially, I thought we were dealing with one of those guys who believes he can weasel and threaten his way into free heads. Ed exhibited this behavior when he attempted to force us to pay him $2XXX for his heads under threat of internet aspersion. As the "customer is always right" fallacy has pervaded the buying public, and the internet gives anyone a voice, many businesses will actually capitulate to unwarranted demands.
Continued...
In the end, when it became obvious that something is very wrong with this gentleman, we decided to stop corresponding with him. The emails and texts had deteriorated into the equivalent of an angry gorilla kicking up dust in a desperate attempt to continue the drama and thus enable him to continue to indulge in the fantasy he's described online. Naturally, anyone who has dealt with obsessed, paranoid, and deluded individuals knows that ignoring them does nothing to quell their foaming attempts to get you to re-engage them. If anything, it intensifies it.
In all I have ~40 emails, 20 texts, and one alter ego from Ed.
How about a representative sampling from the body of correspondence we've amassed? Realize that this is in response to explanation and our offer to run the larger program, but it doesn't even register with Ed...
At this point I am so pissed off, I dont know what I am going to do...
Again as I stated last night, leasson learned, this one just cost me $1500+. Ed...
Phil, I have given it some thought, It seems you want to resolve this issue, I am the customer and am extreamly un happy with what I got, this is what I wouold like you to do, send me a shipping lable with a certified check as I did for you, I will return you the heads, I would like a complete refund that I paid you ($1545.00), plus a resonable amount for the cores, you can sell them to the next guy, I will move on to a different Company, this way the heads stay complete. That is the only solution which would make me comfortable, you should have no issues selling the heads....
Phil, I know you are reading to emails, You easly took my money, now I want this resolved, I am not sweeping it under the rug, I am not going away, So if you think "I got his money, hes got his heads F-him your wrong" I would appreciate a call back, ASAP, why you did not call me this morning instead of texting me I dont understand, unless you have something to hide, you should not care who I talk to about you product, or where I post pics of your products for opinions, If I do not hear from you soon I will take what ever measures I need to resolve this, You may be in NC, but the internet works in funny ways, I hope it does not come to this. Ed...
I will say one thing you talk a good game, I do applaud you...you got one over on me, I hope you sleep well at night, I am a bussiness owner also, and regardless I go above and beyond to fix and issue that happen in the field, and to make my customers happy, must be different in NC. we will speak again Im sure. Ed...
Wow... I can not get a reply on what valave train parts you still have, I want them all, unless they are still on my NON FLOWING heads you sent. Your reading the eamils, thats whats funny... I am not going away, as I said. See you soon, enjoy your trip to Iowa. Oh the "Better bussiness Berau" got your # also. every little but counts. Take care... CLOWN!!!!!...
Still waiting on your reply to my valvetrain items, Or maybee I got the **** him now....well thats ok....KARMA's a bitch. and what goes around comes around. Your still a Clown, and a Hack Job head porter. and funny I got 2 PMs on Tech, stating "we know who did your heads, Advanced Induction, we feel your pain, he screwed us also" OUCH!!! you getting it over on a few customers huh!!!!! maybee its not the ynreasonable customer, Its the JACKAZZ bussiness owner...See you in Iowa.
Now, beyond the simply ignoring everything we said or offered, you'll notice that he continues to assert that not only is he a victim, but he thinks we're going to be heading to Iowa to deal with him. To further add context, realize that throughout this entire sob story detailing how he will be forced to sell the heads... they are bolted to his engine. He documents this himself with his photobucket account.
http://s95.photobucket.com/albums/l1...cpZZ1QQtppZZ24
http://s95.photobucket.com/albums/l1...ndmotor006.jpg
http://i89.photobucket.com/albums/k2.../motorhome.jpg
It gets better, as Ed is utterly consumed by the fantasy that he has been wronged, he creates an alter ego to attempt to restart our "discussion." Read from bottom to top.
________________________________________
From: "Sales @ Ai" <Sales@AdvancedInduction.com>
To: Brian Fizher
Sent: Sat, January 15, 2011 2:47:46 PM
Subject: RE: LS cylinder heads
Brian,
I have no record of a Johansen buying LS heads or labor. If you were given a tracking # and or shippers address and care to forward that I may be able to figure it out. Heads are stamped with the customers initials and 4 digits above the exhaust flange. Hope that helps!
-Phil
From: Brian Fizher
Sent: Saturday, January 15, 2011 1:28 PM
To: Sales @ Advanced Induction
Subject: Re: LS cylinder heads
Well the screen name was OldskoolRcr, I sent paypal to a Allison Johansen I beleve was his girlfreind or maybee wife? Same name on the shipping label on the box, They are a L92-LS3 style head. Maybee he was misrepresneting the heads. They are a nice set. Does your Co. mark them in any way? Thank you. Brian.
________________________________________
From: "Sales @ Advanced Induction" <Sales@AdvancedInduction.com>
To: Brian Fizher
Sent: Sat, January 15, 2011 6:53:18 AM
Subject: RE: LS cylinder heads
What was the sellers name?
Phil
Advanced Induction CHD
6841 Belt Road
Concord, NC 28027
704-918-5526
From: Brian Fizher
Sent: Friday, January 14, 2011 9:53 PM
To: sales@advancedinduction.com
Subject: LS cylinder heads
Hello, I recently purchased a set of LS cylinder heads on the Corvette Forums 4 sale section, I was told the heads were ported by Ai (Advanced Induction), I did not receive any documented info on these cylinder heads. What I am wondering is if there are any markings on these heads which may confirm they were ported by Ai. I have noticed a casting # on the heads I believe it is 5364? but it looks as if it was from the factory. The seller seemed as a honest person, and the photos of the heads he sent me seemed to be done very well, I was told the heads were never ran since he received them from Ai, and his reason for selling was "going a different direction. Anyway I am try to confirm his claims, and maybee obtain a bit more information on the heads. Any help in Identifying them would be appreciated. Thank you, Brian Fizher.
Continued...
1/13/11 12:08 PM 4 days ago
+1319: Stock L92s flow 322 your 1600.00 piles of **** CNCd heads flowed 331 at .600 4.030 bore YOUR a THEIF and a CLOWN Mr. Pedagree Head porter 11:51 AM
+1319: You should be arshamed of your self So since you messed up on the valve cost you made up for it with hack job port work CROOK 12:08 PM
1/14/11 3:29 PM 2 days ago
+1319: Theif 3:10 PM
+1319: 331 CLOWN 3:12 PM
+1319: Pedigree 3:29 PM
In conclusion, buyers and casual readers beware, there are nefarious reasons some people revert to PM's. On LS1tech, it isn't because it is contrary to a vendor's best interests as this board's moderation is very light in that regard. It is often because their assertions will not hold up under scrutiny. Public forums are unfortunately hit or miss in regard to useful and truthful data. Some people are simply broken, and unfortunately for the rest of us they also shop and post online. Ed has provided an ideal example illustrating why you simply cannot trust much of what is said on forums from unqualified voices. The safest assumption is that information, education, advice, etc. gleaned from public forums is ultimately worth no more than what you paid for it. What can you do as a buyer doing research? You might consider the probability that the vendors are here to serve our best interest, as well as yours if those interests are aligned because you elect to give us your business. While no business is infallible, all of us want nothing more than for customers to be satisfied in the end. How can you be sure? Because when you are happy, we receive more orders, and thus more cashflow/income.
If after all of this you are inclined to believe that Ed has somehow been wronged, or that his behavior is somehow acceptable, then I can only ask that you seek another head/headwork provider. I mean no offense, nor am I unappreciative of the community as a whole. However, we are not inclined to feed what, in our experience is little more than unqualified data misapplied for the sake of marketing. There are many shops who feel differently, and will be happy to accommodate you if your primary concern is flow #'s. Best wishes regardless of what you are inclined to believe.
Hope that helps complete the puzzle for you guys. I did not intend to spend the last couple hours putting that together, you'll have to forgive me if I don't have time to come back to this madness.

-Phil

I had a customer like this once....I drove 4 hours one-way to be sitting on his porch when he got home from work. Wasn't so tuff and quick with the mouth on that occasion.

Last edited by midevil1; Jan 17, 2011 at 05:51 PM.
To AI... that's some great vocabulary in your posts....lol. I would imagine that a flow bench is similar to dyno's. They aren't usefull to be compared to other flow benches but could be used beneficially in a before and after scenario to illustrate gains. I'm sure you can explain gains in velocity with increases in flow through smaller ports better then I could.... even though there is more to it then that. Looks like a good head for a stock cubed LS3. I can see your reasoning for not wanting to have to explain cases like this with credit card companies but you are also losing out on a lot of business by not accepting them. Especially if cases are far and few between.


