NoPistons -Mazda Rx7 & Rx8 Rotary Forum

NoPistons -Mazda Rx7 & Rx8 Rotary Forum (https://www.nopistons.com/)
-   Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)
-   -   Teardrop Porting (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/teardrop-porting-52919/)

Hyper4mance2k 09-18-2005 06:09 PM

So I've heard of it for a few years and have never seen it. What is it. I've been searching for 2 days and have found nothing... Some1 please help...

Hyper4mance2k 09-20-2005 02:50 AM

58 views and noone knows...

FikseRxSeven 09-20-2005 06:53 AM

i think you've heard incorrectly.... because i've been active in the forums for a good amount of time and never heard of teardrop porting...



maybe they were describinb the shape of the primary and secondary ports.... its kinda like a crooked teardrop

treceb 09-20-2005 10:05 AM

here we have VWs "teardrop" wheels. maybe they meant that the ports look like them. instead of it being a whole hole, it kinda tapers like the "teardrops" in the rims....

http://www.c3cars.com/CFJFiles/C3Cars/14867.jpg

Hyper4mance2k 09-21-2005 02:01 AM

[attachment=33892:attachment]

Yea I know about teardrop alloys, I had them on my Jetta. I met this guy at a Mazda meet and he was telling me to make sure that when i port my engine to make a teardrop in the port. I think what he ment was making the bowl part of the port into a teardrop shape when i port it. He seemed to know his $#!+, so I listened. I think he ment someting like teh attached pic. Too bad Ito or BDC are never around anymore...

the spyder 09-21-2005 02:49 AM

Tear drop porting is basicly what old school'rs call street porting.

Hyper4mance2k 09-21-2005 03:48 AM

that's what I was figuring. cause the poeple who've mentioned it have been in the game for atleast 10 years. His exact words to me were, "When you port it make sure you teardrop port it along with the bridge. There's enough meat in the iorns to do both."

GLC13B 09-21-2005 07:57 AM

Ok, alot of people are messed-up with this one ! Tear drops on the iron plate go right above the port whole's. There not teardrops, there just little hole's that are place on a angle, so with the drill bit it looks like a tear drop. The objective here (Back in the day's) was to get more power without having to have a brideport. So, instead of the BP you have between 3 to 5 hole's on the iron plate's and the engine give's you more power and a very radical sound. It also isn't as loud as a BP but better than a SP. Usally, the secondary are done, but it can be applied to any engine especially when there isn't enough room little on a 6 port engine where you're kind of skeptical to do a BP. I have owned two and had constructed for myself one with this type of application. If you go over to the Latinamerican forum you'll see many that know about it and probably still use it. Again, this was a technic that was used years back ! https://www.nopistons.com/forums/pub...IR#>/bigok.gif

ColinRX7 09-21-2005 07:16 PM

Teardrop port = Bridgeport, backcut style, with no full eyebrow. The eyebrow would be "dotted". That makes little teardrop shapes, with the tip of the drops pointed at the internal iron face.



Correct?

GLC13B 09-21-2005 10:11 PM

Yes ! You are absolutely correct. This is a nice technic to apply to an engine that you want to sound distinic from the rest and there's benifits from it as well.


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