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Overhead Cam Timing - 4.6L Ford Engine Rebuild - Build A Panther More Power (Finally)

A rebuild for the 4.6

Photography by

Where’d That Power Come From?

Stock versus Trick Flow Heads

Stock NPI (92-99) Heads Stock PI (99-Present)Heads TFS Twisted Wedge
Intake Runner 146 cc 159 cc 185 cc
Intake Valve Diameter 1.752 inches 1.752 inches 1.840 inches
Exhaust Runner 93 cc
Exhaust Valve Diameter 1.339 inches 1.417 inches 1.450 inches
Combustion Chamber 52 cc 44 cc 38 cc
Compression ratio (stock pistons, rods cylinder bore, and deck height) 9.3:1(with 10.5cc piston dish) 9.4:1(with 15.8cc piston dish) 10.1:1(with 15.8cc piston dish)
Cam Specs 204/208 duration at 0.050 lift/0.480 valve lift 200/208 duration, 0.505/0.531 valve lift, 115 LSA 228/230 duration, 0.550 valve lift, 112 LSA

The secret to our 4.6’s newly found power is a collaboration of a better combustion chamber design, bigger ports, slightly larger valves, and Trick Flow’s canted valve arrangement. Changing the angle of the intake valve provides a better path into the cylinders. It also eliminates piston-to-valve clearance problems very common to SOHC 4.6 engines—you can’t advance the cam too far or run intake lift numbers more than about 0.525 inch without notching the pistons. With its valve arrangement, Trick Flow says lift of up to 0.600 inch is safe. Every engine builder we’ve checked with says Trick Flow’s heads—with CNC-shaped chambers and as-cast intake and exhaust runners—will outflow any ported factory cylinder head, and our gains of 70 hp to the rear wheels is right inline with what other Trick Flow customers are seeing. While we’re still breathing through the car’s stock intake and tailpipes, we know there is more potential in these heads, especially at higher engine speeds. We’re looking at intake combinations and possibly a power-adder to see how much more we can wring out of these things. Note in the chart above that the best naturally aspirated combination may be an early non-power- improved block and Trick Flow’s 38cc chamber heads. If you want more compression, bolt these heads on a four-valve block, which comes with flat-top pistons and will net a compression ratio of nearly 12:1. For guys who love boost, Trick Flow also sells a version of these cylinder heads with 44cc combustion chambers. END

Parts List

Description PN Source Price
Clean block and install freeze plugs N/A Hi-Tek $50.00
Trick Flow 2V Modular Top End Kit TFS-K519-390-375 Summit Racing 2,899.95
ARP main bearing cam studs 156-5401 ARP 106.95
King main bearings KGB-MB5353SI Summit Racing 50.95
King connecting rod bearings KGB-CR868SI Summit Racing 39.95
Cloyes timing chain tensioner, right 9-5433 Rock Auto 33.79
Cloyes timing chain tensioner, left 9-5432 Rock Auto 32.79
Fel-Pro timing cover gasket set TCS45869-1 Rock Auto 16.64
Fel-Pro oil filter adapter gasket 230 70801 Rock Auto 7.59
Fel-Pro front crank seal 230 TCS46114 Rock Auto 9.31
Cloyes tensioner arm, right 95340 Rock Auto 17.51
Cloyes tensioner arm, left 95341 Rock Auto 18.81
Cloyes timing chain guide, right 95428 Rock Auto 18.81
Cloyes timing chain guide, left 95429 Rock Auto 19.17
Fel-Pro Oil pan gasket OS30725R Rock Auto 22.79
Fel-Pro valve cover gaskets VS50564R Rock Auto 29.79
Comp adjustable cam gear set 10246SET Comp 248.95
Connecting rod bolts (4.95 each) F3LY-6214-A South Bay Ford 79.20
Rear main seal F4AZ-6701-A South Bay Ford 25.57
Piston pin retainers(sold in sets of 4) F6AZ-6140-AA South Bay Ford 37.84
Stainless Works headers and catalytic converters CRVIC03HDRCAT Stainless Works 1,590.00
Spark plugs NGK3403 B&C Auto Parts 27.60
TOTAL $5,383.96

Tool List

Description PN Source Price
Ford V8 cam holding tool OTC-6498 Summit Racing $119.95
Cam degree supplement kit TFS-90100 Summit Racing 39.95
Ford rear crank seal installer tool OTC-7786 Summit Racing 109.95
Harmonic balancer installer OTC-6505 Summit Racing 119.95
Cylinder leakdown tester OTC-5609 Summit Racing 99.95
Piston ring installer and compressor tool CMB-17-0000 Summit Racing 34.85
Proform Parts universal degree wheel kit PRO-66787 Summit Racing 89.95
TOTAL $614.55

SOURCES
King Engine Bearings
327 Little Falls road, Suite 5
Cedar Grove
NJ  07009
800-772-3670
http://www.kingbearings.com
SPX Service Solutions
Romeoville
IL
www.servicesolutions.spx.com
Westech Performance Group
Mira Loma
CA
951-685-4767
http://www.westechperformance.co
m
B&C Auto Parts
Gardena
CA
310-380-7474
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
Rock Auto
6680 Odana Road
Madison
WI  53719
866-762-5288
http://www.rockauto.com
Blue Oval Chips
Danville
IN
317-718-7231
www.blueovalchips.com
Stainless Works
9899 E. Washington St.
Chargrin Falls
OH  44023
800-878-6935
www.stainlessworks.net
South Bay Ford
Hawthorne
CA
888-358-9380
www.southbayford.com
Hi-Tek Engine Rebuilding
Gardena
CA
310-327-2411
Racers' Edge Tuning
8107 Phlox Street
Downey
CA  90241
562-622-2508
www.racersedgetuning.net
Cloyes Gear And Products Inc.
Ft. Smith
AR
479-645-1662
www.cloyes.com
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159 comments
Bryan Sheffler
Bryan Sheffler

I wonder how the fuel economy is with that big cam?  228/230-degrees @0.050" lift?  That's cam is just a little bit smaller than the cam that is in my 12.8-second Trans Am.  The TA has great drivability, performance, and the only thing that it can’t pass up is a gas station.  It is definitely not a realistic daily driver, but then I’ve never know the high performance press to be realistic. I find the dyno chart interesting as it doesn’t show the improved power much below 3K where most of the daily driving would be   I do have to give Car Craft a nod for doing something that didn’t involve a Camaro.  Some have called them Camaro Craft for good reason. 

Dennis McCue
Dennis McCue

It's not a mod motor ,but how about almost 200,000 on my 2.3 in a 87 Mustang,O-Yeah, it STILL gets 30 MPG!!!!

Derek Nielson
Derek Nielson

The old Dodge big block squad cars in the 70s. That's where its at. Too bad none lasted more than 50, 000 miles

Josh Peppers
Josh Peppers

I'll pull out my zx12 and blow every car away! How bout that??? If you can do 230 mph then we will talk :)

Josh Peppers
Josh Peppers

Fords chevys Chryslers are all built the same. Its a standardized system. I'm an auto worker.. its all opinion otherwise!

Shawn Rodkey
Shawn Rodkey

If it aint wearin a bowtie i aint interested.......

Donny Curtis
Donny Curtis

But the fords I've had built stayed togeather not the chevys I've had both!!

Donny Curtis
Donny Curtis

That depends on the build of that Chevy or ford Tom!!

Tom Kostyk
Tom Kostyk

lol hypacrites... ford people do the same just like ricer lovers and anything else..... everyone brags!! They used caprices in new york since 66..... i think its called research, i worked at ford and still admire chevy's more becuase everyone looks down on them to be slow and unreliable when there quite furiously the opposite!!

Robert Leanzo
Robert Leanzo

I never change the oil in mine it runs great 180000

Brian Hardwick
Brian Hardwick

The Crown Victoria is to Hot Rods what Justin Beieber is to music. No shortage of supporters, but still fundamentally wrong

Dan Southern
Dan Southern

H.O. 5.0L Push Rod Engine would be the better of the two imo . (y) Oh,160,000 in my 96 Town Car .

Roughrider Robert
Roughrider Robert

my ford truck has 501299 miles and still running strong and only had minor maintenance issues to deal with . love it saves me money and makes me happy not stranded .

Charlie Hohenstein
Charlie Hohenstein

The Vic! I've missed this car almost as much as my own Vic! I really need to buy another one of these...

Michael Kuhn
Michael Kuhn

What is the de al eith the phony link? Can you post a good one ?

Roberto Ortiz
Roberto Ortiz

my friend has a crown vic 2002 taxi driver with 300,000 the only thing he ever had to replace was ac compressor.

Roberto Ortiz
Roberto Ortiz

My 01 bullitt has 136,766 and never gave me a problem. Aways on synthetic and never left me on the road a flat tire thosent count. In the other hand malibu, impala, head gaskets all the time, electrical problems an so on ..plus chevy lost me went they started making there best cars front wheel drive, like the impala, monte carlos , chevy sucks

Bob Albert
Bob Albert

103,000 and just put a new water pump on ....

Jason Read
Jason Read

350000 km on my Volvo s60 t5... that's Ford right? Ha ha ha.

Dan Ryden
Dan Ryden

Lol deleted comments now that's good stuff haha

Dan Ryden
Dan Ryden

So u don't drive a Chevy then lol

Dan Ryden
Dan Ryden

Because when u get beat by a 4 door grandpa car that's got a blower under the hood it makes people go home crying that's why some people like to be different instead of modding an old muscle car or a Camaro or Mustang, some people like to do things differently just because it has 4 doors and is heavy doesn't mean it can't kick ur ass if built properly

Charlie Posey
Charlie Posey

94 T-Bird. Had 120k on the clock when the odo broke. Which was before I bought it so God only knows.

Alexdel Battles
Alexdel Battles

I have a 93 Ford ranger and has 841k it is a 4.0L. All stock.

Proformance Mobile Auto Detailing St. Louis
Proformance Mobile Auto Detailing St. Louis

I like almost anything on 4 wheels but I have to say as far as our company vehicles all 4.6, Ford has done well by us. 08 Econoline 250 205,000, 02 F-150 155,000. Both work everyday without any issues. By the way we do have a Chevy Express Van with 110,000 on it. Its sitting behind the garage with more problems than we can afford to fix so we can't use it. ;)

Rob Grosso
Rob Grosso

2000 crown vic interceptor. 181k

Byron Grant
Byron Grant

154k still run great drive it everyday

Andrew McCamon
Andrew McCamon

157000 kms on my 94 towncar. 171000 kms on my 05 aviator

Ron Showalter
Ron Showalter

I've got 142 K on My 07 Interceptor, Still Runs Good, too.

Cal Handley
Cal Handley

14 years with a national truck rental chain as a fleet mechanic. Ford 5.4L engines in E350 duallies, we typically got 140K to 175K before they were sold out of our fleet, with many miles still left in them. No harder service than rental fleet. Everyone that drives it has the attitude "yeeeeehaaaa! It's not my truck!"

Ricky Hildebrand
Ricky Hildebrand

I racked up a little over 370,000 on a 2000 model 5.4 Triton in a E250 before it spit a spark plug out.Never had the valve covers off. Still had the original water pump. Company decided to cycle it out of the fleet in 2010. The guy that bought it used a "Time sert" to repair the spark plug,and I believe he is still driving it to this day.

Adam Hecht
Adam Hecht

Why do these links always crash my phone and computer?

Luis Pupo
Luis Pupo

Bought my crown Vic 10 years ago, been supercharged for 3 years, other than a built tranny stock bottom end. Most reliable car ever!

Andrew Hershfeld
Andrew Hershfeld

Miss driving a crown vic, those big ass cars could really move with the p71 package installed

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