Hey everyone,
I've got a 99' f150 4x4 extenda cab 5.4l 3.73
I had the spark plug blow out the head, now that i got it all open I'm looking for a beefier bottom end.
I see that ModMax has a stoker kit 5.4 to 5.7/5.8 and i'm wondering if anyone has had any input on weather this is a good kit or not.
I am also looking for some performance heads:
will the fr500's fit on a 5.4 modular engine?
how different are the flow rates compared to the heads I have now(with 1 heli coil)?
what about the stock navigator heads 32v ?
I would appreaciate any comments
Thanks
SetDecGuy

 

The modmax stroker kits is the best one out there right now.......expensive! buy good
The heads.........unfortunatly you have Non-PI heads which i would say you should step up to some PI heads but you would also have to change your intake. If you don't want to do that then i would take your heads and have them ported....people have done some wonders with porting the mod heads

 

thanks v10 mustang any thoughts on the navigator heads or maybe th 2000 cobra r heads?
i thought I had the pi heads already?

 

99+ 5.4's have PI heads. Flow numbers on stock 2v heads are 163 cfm intake/150 cfm exhaust @ .500". Stock 4V heads flow 260 cfm intake/201 cfm exhaust @ .550".

 

Set,
Do you have any info on the stroker kit? What do you get? Whats the cost? I can not find anything on their website. I am rebuilding a 5.4L as well. just sent the block to get boiled. I am going start putting it back to gether in the spring because my garage isn't heated and it sucks in there in the winter. But I figured I would start collecting parts so I have everything ready to go. I am looking at a setup from Power Surge Perfomance. For $1900.00 You get:

ARP Head Studs
ARP Main Studs
Custom CP Pistons
FMS High Volume Oil Pump
Manley Forged H-beam Connecting rods
ModMax Plasma Moly Ring set
Performance Main Bearings
Performance Rod Bearings
In this case I would keep the stock crank.

 

99XLT
I have limited info on the stroker kit. Iv'e attached a link below. What i know is it's a 5.4 to 5.7/5.8 std bore/ .020 over , I called one of the local manufactures (Calgary) and got quoted $5000.00 Cnd$. I'm eventually planning on a blower(procharger) so I am building the engine for that.


"Each kit includes: ModMax Pro Billet 4340 crankshaft, ModMax Forged 4340 H-Beam Rods, ModMax custom pistons, heavy duty pins, double spirolox, ModMax Plasma Moly file-to-fit rings, King Hi-Perf Rod Bearings, and Federal Mogul Main Bearings."
http://www.modmaxracing.com/

 

yeah.........you are right.......i was thinking 4.6 not 5.4......sorry......but still......porting the mod heads people have done wonders.......

 

I heard a strokrer kit on this engine would effect the engines longevity anyone have thought on this?

does anyone know if the 2000-2003 mustang SVT cobra heads will fit on the 99 5.4l block?
Does anyone have any flow rate info on cobra r heads, navigator heads, or the SVT heads?


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