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Oh okay.... That is a nice vehicle. Are you in the west part of the state? I'm on the Illinois state line.
What year is your Cougar? and the Engine?
Could I lean on you a little if needed?

Thank you for your help.

What did you do with IMRC's?
I have stock gears in axle and no plans of a super charger at this time.
 

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1994 Cougar XR7 DOHC/5-Speed
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Hi Race Cougar-
Hoping to see the K-Brace issue with 96 DOHC oil pan clearance, EGR in back of Engine, Exhaust clearance.
I have the header from SC performance for Mark 8, extra wiring harness so I can prep without striping out the one in car.
Trying to gleam information from those who went before me to avoid wasted time.
There’s just as much room at the back of the engine as the SOHC, I have EGR on my C head DOHC but fitment varies since the tube routing and valve location on the manifold vary depending on what flavor of 4V you’re using, you can’t use Mustang EGR tubes with kooks headers for example which means if you’re running a Cobra intake you either need a tube fabricated or the bung relocated from the passenger side header to the driver side
 

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The DOHC is stock 96 Mark VIIII stock intake (gen 1) - no additional mods at this time.
Have a great day.
Thank you so much
Larry
 

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The Parts Guy
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Oh okay.... That is a nice vehicle. Are you in the west part of the state? I'm on the Illinois state line.
What year is your Cougar? and the Engine?
Could I lean on you a little if needed?

Thank you for your help.
I'm just south of St. Louis. There are a number of us in the area.

It's a '90 XR7 with a Teksid-based/B-head 298ci stroker (3.75" stroke). That engine started out as a N.O.S. '94 Mark VIII engine that I swapped into the car back in '02-'05.

Happy to answer questions here as they pop up.


What did you do with IMRC's?
I have stock gears in axle and no plans of a super charger at this time.
I used a MSD rpm switch to control the IMRC's for the year that I ran the engine NA. I deleted the IMRC's when I installed the blower.

I'd highly recommend stepping up to at least a 3.73 gear. It'll be a pooch with 3.08's or 3.27's.
 

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Hi Rod-
I'm at the IMRC issue with Vac/Elec actuated solenoid and have read many posting to include yours and what I cannot seem to find the voltage perimeters to send to the IMRC via a RPM activated switch. Can you provide some of the missing details?
I have the Intellitronix RPM switch and I understand I need a relay and resistor to step down the volts but I cannot seem to find the recommended voltage so I can purchase the correct resistor. What voltage is needed? There are 3 wires coming from both IRMC solenoids- red, black and green- I assume green is the feedback wire to the ECM.

Will one RPM operate the 2 IMRC's?
Thank you
Larry
 

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The Parts Guy
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It's been almost twenty years since I did this, so apologies if it's incorrect. From what I recall, I used a MSD RPM-activated switch to trigger a typical 30A automotive relay to close the ground side of the IMRC vacuum solenoid circuit. That vacuum solenoid ports vacuum to the actuators on each IMRC.
 

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Hi there-
How cool is it that this DOHC is still in Motion and has been going for 20 years and your one of the pioneers.

Thank you for the support.
 

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96 DOHC is ready to install and 96 2V is out as of last Saturday. I'm concerned about running DOHC on the 2V ECM.
 

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Hi Matt, I appreciate any insight do you have on this. Are you stating that I don’t need to tune the stock t-bird ECM?
 

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Oh okay- I had contacted 5 star tuning out of South Carolina about a tune and they told me to call back after I got it running before ordering a tune . Do you have a preference to recommend?

I initially was speaking about starting the engine on stock ECM
 

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The Parts Guy
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The stock 2V program will allow the 4V to start, though fueling will be a fair bit off due to the larger injectors. You can test fire the engine on the stock tune, but I'd advise against running it for any length of time before correcting the tune file.
 
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