6 port pictures

David Jerome · 02-18-2008, 02:04 PM

Here is a basic streetport I did a couple weeks back on a 6 port block. On this one I didnt fully polish the intake runners and bowl, I dont really believe it helps but some customers prefer it.

David Jerome · 02-18-2008, 02:05 PM

couple more pics

David Jerome · 02-19-2008, 04:51 PM

Quote:

Originally Posted by RotaryResurrection

If you keep working, one day you will be able to make yours look and feel like mine.

You dont want none of my intake ports

However, I dont want none of your exhaust ports

David Jerome · 02-19-2008, 08:39 PM

That shit is damn impressive. I thought I had passed my teacher, this young grasshopper apparantly still has a lot to learn

Rotary Inspired · 02-28-2008, 02:17 AM

Here is one of my 6 port motors. Please excuse the overuse of hylomar. I was a touch liberal.

Rotary Inspired · 02-28-2008, 02:25 AM

One more. Here are the primary ports in my 10th AE

David Jerome · 02-28-2008, 02:06 PM

Looks nice, I dont think you have to worry about the coolant seals moving during install

Rotary Inspired · 02-28-2008, 10:21 PM

Thanks. Who wants a pinched coolant seal? Thats an extra headache. I always like to see everyones port work. Each one has its own personality so to speak.

N.RotaryTech · 03-19-2008, 02:44 PM

Bwaaaha ha ha ha.

More in the link in sig.

N.RotaryTech · 03-19-2008, 06:00 PM

To late.
The engine is back together and running.
I'm waiting for some misc. replacement parts and the break-in period to be over, until I can see what those ports do.

WE3RX7 · 03-20-2008, 09:33 AM

Thats an odd setup - yea, with the ports still IN though, I would think that would hurt performance while the ports are closed but who knows.

A note on those earlier ports by David Jerome - the shape is pretty good, but bevel them leading andedges! And on EFI - polishing the bowls does make a difference from what I've seen...

N.RotaryTech · 03-20-2008, 11:59 AM

Well Ive removed the sleeves and actuating rods.

I too have wondered about polishing the runners, haven't read much about it, it seems to me its either way effectiveness.
About the runners...
What dose one use, just a grinding stone, or is there a finer grit stone out there, or dose one somehow get a sanding thing in there, or all of the above, depending on how smooth one wants the runners?

WE3RX7 · 03-20-2008, 02:15 PM

I use an extension for a electric dremel with sanding paper - working it with some fine paper and then hit it with some polishing compound. I'm a bling junkie though.

The concept for me is - on carb cars, usually keeping a mildly rough surface helps to atomize the fuel and oxygen as it tumbles through the intake track since carbs doent mix as well. However, w/ EFI - since the injectors spray pattern is MUCH more precise and accurate than a carb's squirter/metering block/jets, the fuel and oxygen atomize earlier/better, so you want as smooth as possible surface to accelerate the mixture...

Dunno, kind of old school logic, but makes sense to me...

02-28-2008, 02:06 PM	#7
David Jerome RCC Contributor Join Date: Jan 2008 Posts: 713 Rep Power: 18	Looks nice, I dont think you have to worry about the coolant seals moving during install __________________ David Jerome Broker for Speed For Sale LLC (David@SpeedForSale.com) (Pre-owned RX7/sports car sales & new parts sales/installs/tuning) PM me about low priced, high quality port work

02-28-2008, 10:21 PM	#8
Rotary Inspired Rotary Fan in Training Join Date: Feb 2008 Location: SW OKC Posts: 75 Rep Power: 18	Thanks. Who wants a pinched coolant seal? Thats an extra headache. I always like to see everyones port work. Each one has its own personality so to speak. __________________ If you wanna become ASE certified buy the RX7.

03-19-2008, 02:44 PM	#9
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC Posts: 552 Rep Power: 18	Bwaaaha ha ha ha. More in the link in sig. __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

03-19-2008, 06:00 PM	#10
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC Posts: 552 Rep Power: 18	To late. The engine is back together and running. I'm waiting for some misc. replacement parts and the break-in period to be over, until I can see what those ports do.

03-20-2008, 09:33 AM	#11
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA Posts: 1,812 Rep Power: 19	Thats an odd setup - yea, with the ports still IN though, I would think that would hurt performance while the ports are closed but who knows. A note on those earlier ports by David Jerome - the shape is pretty good, but bevel them leading andedges! And on EFI - polishing the bowls does make a difference from what I've seen...

03-20-2008, 11:59 AM	#12
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC Posts: 552 Rep Power: 18	Well Ive removed the sleeves and actuating rods. I too have wondered about polishing the runners, haven't read much about it, it seems to me its either way effectiveness. About the runners... What dose one use, just a grinding stone, or is there a finer grit stone out there, or dose one somehow get a sanding thing in there, or all of the above, depending on how smooth one wants the runners?

03-20-2008, 02:15 PM	#13
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA Posts: 1,812 Rep Power: 19	I use an extension for a electric dremel with sanding paper - working it with some fine paper and then hit it with some polishing compound. I'm a bling junkie though. The concept for me is - on carb cars, usually keeping a mildly rough surface helps to atomize the fuel and oxygen as it tumbles through the intake track since carbs doent mix as well. However, w/ EFI - since the injectors spray pattern is MUCH more precise and accurate than a carb's squirter/metering block/jets, the fuel and oxygen atomize earlier/better, so you want as smooth as possible surface to accelerate the mixture... Dunno, kind of old school logic, but makes sense to me...