5.4 Swap

omegared · Jul 13, 2008

I have a chance to buy a cheap P.I. 5.4 motor from a '02 f-250 hd. for $300 dollars. Question is how hard is the swap and is it worth doing?

atrainsgt · Jul 13, 2008

I thought long and hard on the 5.4 thing, IMO its not worth it until some intakes and long tubes are available.

realitygt · Jul 13, 2008

still has to be better than a 4.6 npi lol

96sohc · Jul 13, 2008

atrainsgt said:
I thought long and hard on the 5.4 thing, IMO its not worth it until some intakes and long tubes are available.

Somebody makes adapter plates to run a 4.6 intake on the 5.4, I think its Livernois but I can't remember.

WarHorse · Jul 13, 2008

are there any performance parts for the 5.4? ide figure its a good swap just because its a bigger block, but if parts are scarce then its not a good deal.

on another note i "think" they still make more power stock than a PI swapped 4.6. so if your getting it cheap and its in good condition, you should consider it.

atrainsgt · Jul 13, 2008

96sohc said:
atrainsgt said:

I thought long and hard on the 5.4 thing, IMO its not worth it until some intakes and long tubes are available.

Click to expand...

Somebody makes adapter plates to run a 4.6 intake on the 5.4, I think its Livernois but I can't remember.

Yes, I know you can use the a PI mustang intake on the 5.4l with adapter plates. Problem is, from what I have seen it really kills the potential power. Also consider the added weight.

bluestang98 · Jul 14, 2008

As far as exhaust goes, you could do midlengths with a slightly modified h/x pipe, the adaptor plates won't hurt the power. I am pretty sure that MMR sells them. There is no replacement for displacement. Also a better set of cams would really help it out as far as power band. Just a few suggestions. :thumb:

DropTopPony · Jul 14, 2008

HPS was working on a 5.4 2V intake but i'm not sure if its done yet.

I thought about this swap a few years ago but the added TQ didn't sway me because its heavier on the nose and the HP wasn't much more and the cost was a lot (its cheaper now) so i went with an aluminum 2V setup. If i could get a 5.4 Aluminum Block for under 3.8 million dollars then i would rethink the swap.

omegared · Jul 16, 2008

Alright guys thanks for the input. I will prolly be doing this in a few months.

Jrgunn5150 · Jul 17, 2008

There's a 12 page thread here with all the info you need on it.

whty98 · Jul 18, 2008

So no one manufactures long tubes for the 5.4? Why don't the 4.6 fit, same heads, does it have a different height? I read the threads but couldn't find anything. I wish they'd make the 5.4 intake now!

I don't think it's peak numbers you go after on a 5.4, it the torque curve, it's there when you need.

atrainsgt · Jul 18, 2008

I know. I have my share of posts in the 5.4 thread and I was extremely close to buying a 5.4 to build but without intakes and long tubes I decided against it.

voidfinger · Jul 21, 2008

HPS unless something happend is coming out with the 5.4 intake, also there are people that will moddify a set of headers to work. I think they mentioned that on the thread. I know a couple people on the main sight that has like a 50+ page thread about it that has done the 4.6 modified long tubes

I'll put it this way, from the dyno graphs i've seen with just the adapter plates, long tubes, and a custom cam... well it was bananaS dude. Plus i've seen a stock 5.4 swapped coupe with an auto kill a 96-98 cobra with long tubes and a tune.

You won't have crazy numbers but the tq on the street will make it a killer street car. If you don't get it and the motor is around NC let me know I'll pick it up b/c its either a 5.4 or a 4.6 DOHC for me

outlaw97 · Aug 3, 2008

Got my car back with a 5.4. Car run good 248hp 320t. If you do the 5.4 you will like it. I have no top end ,but down low

uttahere:

jfor441 · Aug 3, 2008

outlaw97 said:
Got my car back with a 5.4. Car run good 248hp 320t. If you do the 5.4 you will like it. I have no top end ,but down low uttahere:

You just put a stock 5.4 in?

realitygt · Aug 4, 2008

http://www.musclemustangfastfords.com/features/mmfp_0806_1996_ford_mustang_cobra/index.html

naturally aspirated will fit under a cobra r

voidfinger · Aug 4, 2008

wow, that intake and heads probably cost twice what my car is worth

Jrgunn5150 · Aug 4, 2008

voidfinger said:
wow, that intake and heads probably cost twice what my car is worth

Twice as much as that car is worth too, but if it's about what it's worth, leave em stock, lol.

voidfinger · Aug 5, 2008

yea i know. I just don't think i could bring myself to spend that kinda money on a set of heads and intake... what is your guess on the price? I'd say at least 4G's for the heads... and maybe 3-5G's for the intake... not to mention ... if i'm correct? didn't the 5.4 00'rs have an aluminum block with forged internals? Only in my wet dreams am i driving that thing.