'97-'98 vs. '99-'01 5.4L engines - Page 2 - Ford Truck Enthusiasts Forums

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'97-'98 vs. '99-'01 5.4L engines

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'97-'98 vs. '99-'01 5.4L engines

 
  #16  
Old 12-28-2009, 12:06 AM
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Originally Posted by BURNSTOUGHFORD View Post
Probably build more power with PI heads on Non PI engine. if it is properly tuned and runs 93 octane gas.

The pistons are flater on a NPI engine and the heads are dished a bit, the pistions on a PI engine are dished a bit and the heads arnent as much to give an overal same compression ratio on both engines.
A PI swapped NPI engine will make more power, but it will also bring you over 11:1 CR if you don't grind down the swirl dams. Forget about 87 octane.
 
  #17  
Old 12-28-2009, 12:10 AM
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Originally Posted by LaserSVT View Post
Could just get a 97-98 block and a set of the new Trick Flow heads. 4.6 Stangs are seeing 420 FLY wheel HP so I bet the 5.4 should be closer to 460.... which would be pretty sweet. After accesories and drivetrain you may see 350 at the wheels.
You won't see power like that in an F150. F-Series intake manifolds have extremely long and narrow runners and won't support the RPM necessary to make the TFS' really shine. Then there's the less efficient exhaust routing and greater driveline losses (especially in LWB trucks).

The ~350 rwhp TFS 2Vs are full bolt on, aggressively cammed engines revving to nearly 7 grand and making peak power over 6K. These combos would not shine as much in a near 5000 lb truck with comparatively tall gearing.
 
  #18  
Old 12-28-2009, 12:38 AM
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Originally Posted by Big Bad View Post
You won't see power like that in an F150. F-Series intake manifolds have extremely long and narrow runners and won't support the RPM necessary to make the TFS' really shine. Then there's the less efficient exhaust routing and greater driveline losses (especially in LWB trucks).

The ~350 rwhp TFS 2Vs are full bolt on, aggressively cammed engines revving to nearly 7 grand and making peak power over 6K. These combos would not shine as much in a near 5000 lb truck with comparatively tall gearing.
True and I was thinking with a P-51 or TF plenum on it. I do have a ton to still learn about these trucks and all my Ford experience was all Mustang. I have had allot of them and heavily modded them all. In my Mustang groups I had noticed that most sticks had a 15% loss and most AODs were 18% loss. I figured with the larger driveshaft and larger axle that a 20% loss was correct but I guess 22% is more realistic.
Also the 4.6 making 420 FWHP with the TF parts was on the mild stage 1 cams. More agressive then a F-150s but not much over a stock Stangs cam and its sweet spot was 3-5K but again I see your point. In the truck you want to move that curve down several hundred RPM.
 
  #19  
Old 12-28-2009, 12:55 AM
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Originally Posted by Big Bad View Post
A PI swapped NPI engine will make more power, but it will also bring you over 11:1 CR if you don't grind down the swirl dams. Forget about 87 octane.

That was what i was saying. You will have to run higher octane gas to make it work.
 
  #20  
Old 12-28-2009, 01:44 AM
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Originally Posted by LaserSVT View Post
Also the 4.6 making 420 FWHP with the TF parts was on the mild stage 1 cams. More agressive then a F-150s but not much over a stock Stangs cam and its sweet spot was 3-5K but again I see your point. In the truck you want to move that curve down several hundred RPM.
They were Comp 270s weren't they? Over 230 degrees duration, about all I would run with a stock plastic Mustang manifold, or comparable longish runner EFI manifolds at stock displacement.

You'd have to drop that duration figure by a good 15 degrees to be a decent match up with the Triton intake which signs off at 4800-5000 rpm regardless of heads or cams.
 
  #21  
Old 12-22-2012, 05:29 AM
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Originally Posted by torkum View Post
Did 4.6s get PIs in 99 or 01?

Windsor began usu g PI heads/cam's/manifolds in 1999 and romoe in 2001. This means truck and mustang modulate went PI in 99 and panther platform went Paid in 01. Ive seen multiple listings citing NPI nxumbers for 99 super duty engines so that must be the case, though it doesn't make sense to me...
 
  #22  
Old 01-13-2013, 09:43 PM
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Last edited by Big Bad; 01-13-2013 at 09:45 PM. Reason: redundant content
 
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