5.4L Mustang GT on the dyno
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Uploader Comments (jscottgt)
Top Comments
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A lot of Lightning owners swap Navigator heads onto their trucks, which are 4V heads. It's pretty popular, and I would say worth-while, but then again I am biased towards 32 valves. :)
3 years ago 5
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wow a whole new motor only gave it lik 25 more punds of tourqe....doesnt seem worth it..
1 year ago 4
All Comments (74)
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@jscottgt Was that the stock/truck cams?
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260 on a dynojet, 306 HCI combo...nice starting point for this new edge.
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My 94Mustang put down
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the 5.4sohc swap in any car, doesn't get you any more than the stock 265hp. it does get you more torque, and better potential down the road... that baby needs a tfs heads/cams package, stat!
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@EviLotus01 You swap the motor for the capability, not for the initial horsepower/:
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@anothertry It depends where he started at. Most 99-04 mustang gts dont even make stock numbers. Also thats a 5.4 so more displacement than the 4.6
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@EviLotus01 Actually about 40 HP and 70-80 lbs ft. Not a bad gain with a stock intake and adapters. With an intake, TFS heads and big cams the 5.4 is good for around 400/400 N/A (assuming the bottom end can handle the RPMs). I am looking into this myself and the advice I am getting is MHS Stage 3+ or Comp XE278s to match the long stroke. Makes sense. IIRC the long-stroke, low-flowing Pontiacs of the 60s and 70s ran much bigger cams than equivalent-sized Chevy's with greater streetability.
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@therisingsun777 wow thats low, are you using a mustang dyno? im pretty sure they usually dyno around 220 on dynojets. Hell my stock v6 made like 155 to the wheels on a dynojet
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This was the initial run with no real tuning and still using the stock PI intake on adapter plates & maxed out 19#/hr injectors. Now that I upgraded to the HPS manifold and 24# injectors it is making 292/340 @ the wheels. This was all good for a 13.4@104 run on street tires (and IRS) recently.
jscottgt 1 year ago