Go Back   Rotary Car Club > Tech Discussion > RX-7 2nd Gen Specific (1986-92)

RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

Reply
 
Thread Tools Display Modes
Old 01-01-2017, 12:11 AM   #1
vex
RCC Loves Me Not You
 
vex's Avatar
 
Join Date: Jul 2008
Location: Influx.
iTrader: (6)
Posts: 2,110
Rep Power: 12
vex will become famous soon enough
Default New Intake Manifold; Mech OMP Concern

I've got a design for a custom intake manifold and am beginning the mental process of working through installation. While doing this, it struck me that I still have the OMP to consider. I will be using a standard throttle body (say a mustang 90mm for sake of arguement), but that precludes any out-of-the box attachment to the mechanical OMP control rod. So what are my options?

Some ideas that come to my mind are:
Convert to electric omp (i think i can run it on my ps1k)
Modify the tb to accept the control rod--this won't go well
Block-off and premix (I'd like to avoid that if possible)

Are there any other options I should consider? Are there anythings i need to be aware of with the aforementioned items?






vex is offline   Reply With Quote
Old 01-01-2017, 05:33 PM   #2
JL1RX7
Rotary Fanatic
 
Join Date: Feb 2008
Location: Front Royal, VA
iTrader: (1)
Posts: 485
Rep Power: 10
JL1RX7 will become famous soon enough
Default

Sounds like you answered your own question. Premix.

Only other option would be the Sohn(sp) (Rotary Aviation) adapter for adding the premix.

If you are using an aftermarket controller if it has an extra digital output for straight on/off control for a pump, or if you are lucky an analog output that is variable.
JL1RX7 is offline   Reply With Quote
Old 01-01-2017, 07:13 PM   #3
Pete_89T2
Lifetime Rotorhead
 
Pete_89T2's Avatar
 
Join Date: Apr 2010
Location: Elkton, MD
iTrader: (1)
Posts: 838
Rep Power: 8
Pete_89T2 is on a distinguished road
Default

If your ECU can drive it, I'd go the electronic OMP route. You'll need to swap in an S5 front cover as well.
Pete_89T2 is offline   Reply With Quote
Old 01-03-2017, 12:25 PM   #4
vex
RCC Loves Me Not You
 
vex's Avatar
 
Join Date: Jul 2008
Location: Influx.
iTrader: (6)
Posts: 2,110
Rep Power: 12
vex will become famous soon enough
Default

Is there any detriment to just locking the mechanical OMP to max besides increased oil consumption?
vex is offline   Reply With Quote
Old 01-03-2017, 01:06 PM   #5
TitaniumTT
Test Whore - Admin
 
TitaniumTT's Avatar
 
Join Date: Mar 2008
Location: Right Behind you son
iTrader: (4)
Posts: 4,582
Rep Power: 10
TitaniumTT will become famous soon enough
Default

I don't understand why people are so confused on the concept of pre-mixing. Hell, even my little renni get's premix as well as the electric OMP.

I suspect a cable wold be very easy to setup to control the OMP mechanically, and if the PS1k can rock the electric, I would go that route with the Sohn adapter and premix in the tank as well.
__________________
-The Angry Stig-
DGRR 2009, 2011, 2012 & 2013 - Best FC

DEALS GAP!! WOOHOOOO!!!!!

2015 Audi S4 - Samantha - Zero Brap S4
2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter
2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins
1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle
1988 'Vert - In progress
1988 FC Coupe - Gretchen -The attention whore BEAST!


I'm a sick individual, what's wrong with you?
I'm pure Evil
I'm still insane, in the best possible way.
I think Brian's idea of romance is using lube.
Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion.
You win with your thread. Most everything
It's a truck with a steel gate on the back. Just a statement of fact

Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff....
No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon.
-Angry Motherf*cker Mode ENGAGED-
TitaniumTT is offline   Reply With Quote
Old 01-03-2017, 03:47 PM   #6
vex
RCC Loves Me Not You
 
vex's Avatar
 
Join Date: Jul 2008
Location: Influx.
iTrader: (6)
Posts: 2,110
Rep Power: 12
vex will become famous soon enough
Default

Now that's an idea B. Maybe a bicycle type cable and piggybacking/modifying the TB might work. Will need to look into and validate that I have the stepper motor output available for the OMP (I can't remember if I was already going to use that for a IAC, but I can always get away with either the A or D out).

I do like the Sohn idea.

Looks like the Sohn adapter offered by RA is only available for the OMP-style (or the Renni).

Last edited by vex; 01-03-2017 at 04:34 PM..
vex is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 06:09 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Hosted by www.GotPlacement.com
Ad Management by RedTyger