Secondary Port Woes - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
NoPistons -Mazda Rx7 & Rx8 Rotary Forum


2nd Generation Specific 1986-1992 Discussion

Reply
 
 
 
Thread Tools Search this Thread
Old 03-23-2003, 04:25 PM   #1  
Super Moderator
Thread Starter
 
Join Date: Sep 2002
Location: Tallahassee, FL
Posts: 5,425
Default

I had added pineapple racing inserts, and they worked fine. I loved them.



Then I had a racing beat header and presilencer installed. I had the guy weld the split air pipe receiver bung (or whatever...) after the presilencer, before the stock catback. I just managed to seal it properly (it took some clever bending...), but the ports still won't activate at any rpm. The vacuum hose is attached properly to the intake manifold.



The only thing I can see wrong is the larger rubber hose that provided fresh air to the cat (that connects at the check valve). It had kinks in it (new hose too soft). I didn't think that mattered, since I have no cats, and the airpump isn't attached.



They used to work, but now they don't. I kinda want these functioning properly, to utilize the inserts and all the hard work I did to get them there. What's the deal?
Baldy is offline   Reply With Quote
Old 03-23-2003, 05:02 PM   #2  
Senior Member
 
Join Date: Aug 2002
Location: Eastern PA
Posts: 1,801
Default

Baldy, if he didnt connect the backpressure pickup tube by welding a small flange, are you sure he didn't just weld the small tube shut by accident? Even with my RP cat back, RB pipe and presilencer, mine still open fine off backpressure. You could always remove the actuators and wire them open or like Mike said use the air pump to activate them.. not sure how he did that though.
FCmaniac is offline   Reply With Quote
Old 03-23-2003, 06:16 PM   #3  
Member
 
Join Date: Mar 2003
Location: Sault Ste Marie ON
Posts: 84
Default

How do you know if your actuators are working properly?
wopa20 is offline   Reply With Quote
Old 03-23-2003, 07:16 PM   #4  
Member
 
Join Date: Mar 2003
Posts: 76
Default

Baldy here's something i found looking around a while ago... and i'm planning on using it myself



i think this is what FC might be talking about



plus with a little tinkering you can hook up a air pressure sensor to that and make it

so you can control the air flow from the drivers seat.



Frank
RXciting is offline   Reply With Quote
Old 03-23-2003, 07:35 PM   #5  
dac
Senior Member
 
Join Date: Oct 2001
Location: Portland, OR
Posts: 790
Default

Use paperclips on the rods, if they open the paperclip will be moved up the rod.



Otherwise, You'll know it. Without them working you don't get that push in power @ 4K RPM.
dac is offline   Reply With Quote
Old 03-23-2003, 08:00 PM   #6  
Senior Member
 
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Default

Quote:
Originally Posted by wopa20' date='Mar 23 2003, 07:16 PM
How do you know if your actuators are working properly?
1Revvin7 is offline   Reply With Quote
Old 03-23-2003, 08:17 PM   #7  
Super Moderator
Thread Starter
 
Join Date: Sep 2002
Location: Tallahassee, FL
Posts: 5,425
Default

well, I look at them while twisting the throttle actuator thing...I've also had my wife rev the engine while I look



I've done this before, when they worked, and I could see them move, now they don't



and the welder did weld the small flange, then I bolted the pipe to it, and I know is wasn't welded shut, because I felt the air coming out before I reattached the tube



I don't want to wire them open, I really don't like that option



Quote:
Baldy here's something i found looking around a while ago... and i'm planning on using it myself



i think this is what FC might be talking about



plus with a little tinkering you can hook up a air pressure sensor to that and make it

so you can control the air flow from the drivers seat.



Frank


and I don't know what you're talking about
Baldy is offline   Reply With Quote
Old 03-23-2003, 08:23 PM   #8  
Senior Member
 
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
Default

The ports will only open under load, revving the engine does not produce load, You have to be driving it. Put a hunk of grease on the bottom of the actuator rod, go for a spin then check after to see if it is smeared..
1Revvin7 is offline   Reply With Quote
Old 03-23-2003, 08:31 PM   #9  
Senior Member
 
Join Date: Mar 2002
Location: Ky
Posts: 2,725
Default

mine would open at 5k with stock exhuast while revving in nuetral so with out the back pressure of the stock exhuast id say youd have to take it to about 7 or more in nuetral.
Seppuku is offline   Reply With Quote
Old 03-23-2003, 08:38 PM   #10  
Senior Member
 
Join Date: Sep 2002
Posts: 282
Default

the header is blocking the backpressure hole up at the block. If you take it off you'll see it. Also, look at your stock manifold or gasket. There'll be a mysterious hole in it, that's how the actuators get their backpressure. That hose going to the cat is a different thing. It won't do a thing for your actuators.
rotary>piston is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Turbo 6 port port job - no bridge port TweakGames Rotary Engine Building, Porting & Swaps 25 10-14-2007 12:10 AM
Primary Vs Secondary Port Timing 10k2 Rotary Engine Building, Porting & Swaps 3 04-27-2005 09:53 PM
Jude Ito's Extreame Secondary Port pvillknight7 Rotary Engine Building, Porting & Swaps 6 04-25-2005 03:52 PM
My Preliminary Secondary Port Templates Drago86 Rotary Engine Building, Porting & Swaps 8 03-14-2004 03:26 PM
6-port Woes Baldy 2nd Generation Specific 8 01-16-2004 05:42 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 04:01 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.