TweakGames

iTrader: (3)

lol, this is great.

BDC, could you throw that t2 plate on a scanner real quick so I can have a better idea of dimensions please. I need to see a flat picture with a little more area around the port so I can compare a few things.

TweakGames

iTrader: (3)

Just to make it clear, I clearanced the side seals to .003 to .004, most right between the two at .0035. I'm pretty sure I have video of me on my camcorder doing the clearancing for 3 hours (or until my camcorder got full.) I can upload it if you would like to see.

Lol, I have not seen someone try to avoid the actual topic at hand this much since Bush and the whole terrorist nuclear weapons thing. Great entertainment.

The fact is NOT that it is OVER ported, it is actually the fact that you under ported it in a certain spot. It is the shape and angle of the closing edge of the port. I honestly know that you are not so stupid that you can not understand it, so you are trying your best to avoid the actually issue all together. It is NOT that the port is over sized, it is that the closing edge is shaped wrong, that it caused the side seals to crash. Do you not understand that from the animation? The explanation of the master or all porting on no pistons? Really? After all this, you are still trying to talk about how it is not ported too large? I honestly don't know of any other way to explain it better. lol

I need someone, anyone, to upload a scan of a stock port, one that is large enough where the trailing end of the side seals are unsupported. (I think this would even include the stock t2 secondary ports if I remember correctly?) If you could just place it on a scanner, and scan most of the plate and the port that would be perfect. I just need it to have reference points to help explain what is going on, since some people still have not seemed to grasp the crazy radical mind blowing idea yet. If someone has a scanner and a plate with them, but does not fully know how to scan an image into their computer, I will be happy to help. Just PM me your phone number or instant messenger screen name.

Lastly, before I need to head out, BDC should not be experimenting with clients ports when they have told him repeatedly, that they are going for reliability, only 300 rwhp. If he wants to go and try to find the perfect rotary port job, good for him, but do it on his own projects, don't use people's engines as test subjects, especially when they are going for reliability.

Barry Bordes

Here are a few other experts' ideas of secondary ports. I like Ito's closing scissors better but all seem to work.
Barry


Racing Beat


Pineapple


Judge Ito

BDC

Sure you did.

The person here avoiding the real topic is you, Michael. You broke your own engine from your own foolishness and arguably impatience. You've not responded to other peoples' questions. You've ignored every single point I've listed, dismissing them off, because there *must* be something wrong with my porting by default. Nevermind the pictures I've posted up of my primary ports along with both ends of all twelve of my side seals. Makes no difference at all that it's the same primary port I've been doing on all these engines. Nevermind the fact that your failure happened on drift day (where you may or may not have been bouncing off the rev limiter). Nevermind the busted coupler and then your run after that. No matter that it happened after a turbocharger change where the fuel map in boost was not re-tuned. It also doesn't matter that it was just fine for several thousand miles including the time I spent having you hammer on the car when it was finally boost-worthy!! And of course one more to brush off: the broken-in-half corner seals.

If there was truly a problem with my porting to the point of breaking side seals and snapping corner seals in half as was your catastrophic engine failure, then it would've happened the day I was here on my computer trying to help you (online) get your car started. It would've surfaced then. Not coincidentally on drift day! Not several thousand miles later! Not AFTER atleast two hours of tuning and me having you hammer your car! and NOT after you changed the turbocharger for crying out loud!

Avoiding the issue would've been avoiding this thread from the get-go as well as removing you off of AIM; both of which haven't happened. When you first came up with the theory with Allen, I listened even though I ultimately disagreed. I looked more closely at what Allen was saying. I tried to be provisional and conciliatory (as I always try to do) hence my suggestion of you sending me your housing. My "avoiding this issue" I suspect is more to the point of "I'm not doing everything you want me to do" which I figure includes replacing a perfectly good Cosmo center housing along with purchasing you new parts.

Also, I understand the animation, even though it's flawed (such as the straight side seal and questionable distance between rotor housing edge and corner seal). You want me to take pictures of mine and yours presumably to lay them over each other and find some alleged point-of-fault by way of a difference. "See! There's a very minour difference! That's why mine broke!" It's not happening as it won't prove anything and it further serves to avoid every valid point I've already laid out.

Experimenting with clients' ports? Absurd and I resent that. Don't you dare accuse me of that because I know I don't do that nor do I do any experimentation on anyone else's hardware for that matter.

I'm sending you your plate back today, untouched, along with a money order for $25 to reimburse your shipping cost to me (since I did initially ask) and I'm washing my hands of this. I'm done with you, Mike. You're trying to strong-arm me by way of this thread into some sort of concession that'll ultimately cost me a chunk of money from something that I've not done wrong If I choose to give in. It's not going to happen. If you allege that the ports are "under-ported", then it'll be all of 5-10 minutes of some light grinding to "fix" that and surely you don't want me "experimenting" on your housing.

Say whatever you'd like about me in this thread, in public, or on a forum, but I know I did a good job on your parts and on your tuning. I know I'm right and plenty of other people I've spoken to (some of them who've been doing this twice as long as I have) affirm the same. I know that I went above and beyond (and you know it, too) to help you get your car running even though it took several times longer than the amount of time I normally spend on a car because of the poor condition it was in. Your friend Rob knows this. People on this forum and all of my customers know that I do a good job and they know that I frequently go out of my way to try my best to make sure things are right. They know what I'm all about.

B

TweakGames

iTrader: (3)

No worries, I already knew from the minute Allen and I told you about how the side seal were crashing with the pictures, and how easily you dismissed it as impossible, you were going to ignore this the whole time and try to "wash your hands of it." Doesn't really matter I guess. I just came here to find out what blew my engine, and even with you denying it, I know. We all know.

Anyways, I do think that this thread is unfinished on the side of information. I would still like to see a scan of a stock secondary t2 port so I can see some dimensions. I am not home, so I do no have access to my plates. I ultimately want to get a side scan of a rotor with all of the seals installed, and then run a couple tests with different ports to see what angle the closing edge needs to be to avoid this problem. Could be interesting, because the further you port up (visualizing it in my head) the more angle the closing side needs to be. Am I thinking correctly on that?

Also, I just want to say thanks for everyone that helped me find get to the bottom of this. Took many hours of typing and picture drawing for me to fully understand what was going on too. I also would like to thank all the people that helped behind stage that didn't want to cause a fight, just the confirmation from you guys that I was on the right track, helped a lot. I never would have thought porting was so complicated, and that there are so many rules or boundaries to it.

Thank you, you have allowed me to continue on to my next build, not scared that something as silly as blowing a coupler will blow our engines. I honestly was going to be done with rotary engines on this last failure, but I think because it wasn't the engines fault, I can't fully call that strike 3. Next build here I come! Next goal 400 rwhp!