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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

my notch vs. 96 cobra

  • Thread starter Thread starter rock4451
  • Start date Start date Jun 24, 2009
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strtrcr50

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Previously from Dirty Jerzey exit 7a
Jun 25, 2009
#81
  • Jun 25, 2009
  • #81
LaserSVT said:
Yeah cause its worth giving up some low end torque so you can have no more power up top..... wait, that aint right.
Click to expand...

I remember when MMFF was doing their cobra buildup. I believe the project name was superfly. I still wonder what they thought they were accomplishing with their imrc deletes. Maybe 3-5 hp up top because the butterflies didn't obstruct hp?
 

LaserSVT

Got FB banned again for saying nards
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#82
  • Jun 25, 2009
  • #82
strtrcr50 said:
I remember when MMFF was doing their cobra buildup. I believe the project name was superfly. I still wonder what they thought they were accomplishing with their imrc deletes. Maybe 3-5 hp up top because the butterflies didn't obstruct hp?
Click to expand...
I guess if you were building a race car that spends 90% of its time above 4500 then it may help but it hurts it as a street car so much and even as a road corse car because you would have to shift more often.
 

rock4451

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#83
  • Jun 26, 2009
  • #83
do all 4vs have the IMRC, even the termi's?
 
B

bentley429

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#84
  • Jun 26, 2009
  • #84
Cobra, does it have gears? If so it will be worse.
 

Gearbanger 101

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#85
  • Jun 26, 2009
  • #85
rock4451 said:
do all 4vs have the IMRC, even the termi's?
Click to expand...

No, the later 4-valve engines (99-up) had a revised head design that promoted more torque down low. The '99 and '01 heads got the "tumble port" design, which boosted torque down low, but as a result gave up a little on the top end compared to the earlier "B" castings. It wasn't until they revised them again on the '03-'04 Cobra, Mach 1, Marauder that they were able to find a nice balance of both.

The IMRC plates and "B" heads were available on early 4-Valve Cobra's, Lincoln Mark VIII's and Lincoln Continentals.

I can't remember off hand where the SUV heads fell into the eqaison...but they were later castings as well.

Some good 4V head info here. 4v head info - Mod Motor Tech Forums
 

rock4451

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#86
  • Jun 26, 2009
  • #86
no the cobra doesn't have gears. i'm goin to the track here relatively soon...if i line one up i'll tell ya how it goes...
 
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