Intake Manifold Port Matching - RX7Club.com - Mazda RX7 Forum

Rotary Car Performance General Rotary Car and Engine modification discussions.

Intake Manifold Port Matching

Old 03-29-08, 12:29 AM
  #1  
Learns the hard way.....
Thread Starter
iTrader: (2)
 
13brenova's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, Tx
Posts: 437
Thanks: 0
Thanked 0 Times in 0 Posts
Intake Manifold Port Matching

I recently gasket matched my UIM to LIM and LIM to Engine. The mismatch on the UIM to LIM was very small, but the mismatch on the LIM primary ports to the engine was substantial. I've read a number of threads......it fights reversion......reversion is bad.....reversion is good. I realize it will be a minor improvement if any (Yeah, I'm bored while the car is getting painted). Bottom line, did I screw up the intake? The engine is a 13b-re, half-bridge, with a GT4088R turbo.
13brenova is offline  
Old 03-29-08, 06:14 PM
  #2  
Learns the hard way.....
Thread Starter
iTrader: (2)
 
13brenova's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, Tx
Posts: 437
Thanks: 0
Thanked 0 Times in 0 Posts
Anyone?
13brenova is offline  
Old 03-31-08, 08:44 AM
  #3  
Rotary Enthusiast
5 Year Member
iTrader: (1)
 
turbine's Avatar
 
Join Date: Sep 2004
Location: seattle wa
Posts: 906
Thanks: 0
Thanked 0 Times in 0 Posts
do you have any pics of your work. port matching can increase flow which can increase HP. its a fine line though because you can also decrease flow and lower the charge velocity. which will lower HP. with out a flow bench you never know. but hey who has a flow bench. you are probably fine. but post up some pics
turbine is offline  
Old 03-31-08, 10:35 PM
  #4  
Learns the hard way.....
Thread Starter
iTrader: (2)
 
13brenova's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, Tx
Posts: 437
Thanks: 0
Thanked 0 Times in 0 Posts
Here ya go.........
Attached Thumbnails Intake Manifold Port Matching-lower-2-pre-port.jpg   Intake Manifold Port Matching-lower-2-post-port.jpg  
13brenova is offline  
Old 03-31-08, 10:37 PM
  #5  
Learns the hard way.....
Thread Starter
iTrader: (2)
 
13brenova's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, Tx
Posts: 437
Thanks: 0
Thanked 0 Times in 0 Posts
My mistake. There was a pretty big mismatch on the primary and secondary.
13brenova is offline  
Old 04-03-08, 09:14 AM
  #6  
Rotary Enthusiast
5 Year Member
iTrader: (1)
 
turbine's Avatar
 
Join Date: Sep 2004
Location: seattle wa
Posts: 906
Thanks: 0
Thanked 0 Times in 0 Posts
i think that looks fine. i plan on doing the same thing
turbine is offline  
Old 04-03-08, 02:28 PM
  #7  
FD pro licensed driver
10 Year Member
iTrader: (3)
 
TweakGames's Avatar
 
Join Date: Feb 2006
Location: Renton/Bellevue/Seattle WA
Posts: 2,897
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by turbine View Post
i think that looks fine. i plan on doing the same thing
Let me know how it turns out for you two, I am interested also.

BTW, where did you find a intake gasket for the RE?

Thanks
~Tweak
TweakGames is offline  
Old 04-03-08, 04:26 PM
  #8  
Brap Brap, Fap Fap
iTrader: (7)
 
Shainiac's Avatar
 
Join Date: Jun 2006
Location: Lyme, CT
Posts: 1,473
Thanked 7 Times in 7 Posts
For some reason, on my 6-port, I remember the gasket matching up almost perfectly.
Am I wrong?
Shainiac is offline  
Old 04-03-08, 04:36 PM
  #9  
Learns the hard way.....
Thread Starter
iTrader: (2)
 
13brenova's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, Tx
Posts: 437
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by TweakGames View Post
Let me know how it turns out for you two, I am interested also.

BTW, where did you find a intake gasket for the RE?

Thanks
~Tweak
Mazdatrix
13brenova is offline  
Old 02-17-18, 11:11 PM
  #10  
Make an assessment...
iTrader: (2)
 
speedjunkie's Avatar
 
Join Date: Aug 2004
Location: Colorado Springs, CO
Posts: 4,130
Thanked 6 Times in 6 Posts
Wrong thread.
speedjunkie is offline  
Old 02-21-18, 10:21 PM
  #11  
Rotary Enthusiast
iTrader: (1)
 
13btnos's Avatar
 
Join Date: Oct 2004
Location: VISTA
Posts: 790
Thanks: 0
Thanked 3 Times in 3 Posts
You didn't screw anything up what's more of a restriction is your stock manifold https://www.rotary-works.com/intake-.../RW-IM-COSMO-4 I'd look into this it will flow a whole lot better. I have the FD version but SemiPport haven't ran it yet but very nice piece. My buddy ran the stock cosmo intake with a Wilson 90mm throttle body and was making in excess of 1000rwhp so overcame the short comings of the stock manifold by just throwing more boost at it. Can't wait to see your car back up love it. Also I'd get a FD metal intake gasket and match it to the cosmo ports those paper gasket will blow out with higher boost pressures.

Last edited by 13btnos; 02-21-18 at 10:25 PM.
13btnos is offline  
Old 02-27-18, 03:32 AM
  #12  
Automotive Designer
 
RGHTBrainDesign's Avatar
 
Join Date: Aug 2012
Location: San Jose, CA
Posts: 1,429
Thanked 40 Times in 37 Posts
Avoid that like the plague. I can think of 3 cars that had that intake manifold in the past, all leaked, and 2 of 3 caught fire multiple times.
RGHTBrainDesign is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
C. Ludwig
Single Turbo RX-7's
49
01-30-19 07:31 AM
Engine stand ready
New Member RX-7 Technical
3
08-14-15 11:26 PM


Thread Tools
Search this Thread
Quick Reply: Intake Manifold Port Matching


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: