i gues i'll start savingup for a hps intake then...

 

the intercooler can not be used with the cobra upper. as it sits in the manifold, the cobra upper isn't designed to seal against the intercooler and direct air through it. if you use the cobra upper, air would just callida against the intercooler and try to flow around it and not through it. also, you would have no way to plumb the coolant lines in and out.

you could make a similer set-up that WILL work the way you want. you would need the lightning lower, intercooler, and the lightning midplate. You can buy it from KarKraft.com

it looks like this:



that is the only part that will allow you to use the intercooler. unless you are a great fabricator, anything else will not seal right to the intercooler and allow air to flow through it. note the holes in the rear to plumb the coolant lines. it isn't a very thick piece, so shouldn't caus much issues.

if you know a fibricator, or are one yourself, you can have an upper lid with the throttle on it fabbed up to mount on top of the midplate. just like the blower normally would. I would suggest you use a design that has the TB facing the front of the engine, as it would allow for the best flow into the intercooler. with this design, you will have to have custom intake tubes made to go from the S/C to the TB that is now facing the front.

Or, you can somehow figure out a better easier way to do it.

If you want to keep the intercooler, you need the mid plate. Good luck, let us know if you figure out a way to make it work well.

 

you may also consider upgrading that S trim to a T trim. the S will not be a good match to the 5.4l

 

just like I tell y'all all the time... t trim baby. You lose efficiency with the s trims cuz they have to spin faster to make the same boost as they would on a 4.6. All about the CFM @ temp-x

 

engine for sale...









































just kidding. Wanted to mess with someone's head. Turned out it was yours. How does that make you feel?

 

i like that. you will probably be the first 5.4 2v N/A to get a good rpm band. 11" runners with enough cross section will peak at 5200 rpm torque. with PI cross section probably 4500-4700. remember length is 3rd order ram tuning, but cross section determines peak/rpm/torque. so a mismatch = low torque and hp. i have seen a few modded AL intakes. if you can coax a little taper (ideal is 4 degrees for 14" runner) you can maximize hp.

 

so, i need to get the cash for the hps intake/ported by r3d...

 

nope...


HPS IS MAKING THE 5.4L 2v specific intake. I got the call this morning. I'll be sending my design changes to bob today.

 

i e-mailed them.

what started out as just a couple lined e-mail voicing my support of the intake, became a bit lengthy discription of how i felt the need for their product. oooops. but i'm sure being very detailed was a good thing.

 

it is... the bigger the support from us the better it is for them. Tooling up for this kind of thing costs more than a car. He's got to show that there's a market begging for these things to have people hand him the moolah.

What we're looking at right now is a much improved version of the 4.6 intake. I've sent bob a nice list of specific changes that will make this work for us. Runner length should be <12 inches with a pretty big runner cross section and a nice taper from bell mouthed inlets. The main plenum will be truly massive.

 

how much you think it will run for the 5.4 intake?

 

about the same as the hardball'r. Figure in the 6-750 range. The initial lot always goes for less as a group purchase. If you guys can find 5 of you to agree that you all want it and start saving dedicated funds for it, then I'll set up the GP with Bob.

 

lets do it. who is in on this?

 

Hey Guys,
Finally finished all 84 pages of this thread, or should I say mile long string!! Got started and couldn't get away from it. Took me about a week but well worth it. What a great bunch of intelligent and informative people. I love to bang my Cobra around but this makes me want to go find a blown up GT and start a winter project turning a wrench again. Keep up the good work. Looking forward to everyones results with their projects. Hope you get some respect in a MM&FF article.

 

the plenum on mine is 350 cubic inches. that's a bit much, so torque suffers a little. i did it this way to explore the heads, really. i needed to know if 5700 was possible with stock heads.

if your plenum was in the 325 inch range you would keep most torque but still have top end. spacers can make up the difference if you want it more top endish.

short runners are a two edged sword. 12" is plenty long. it would be a good option if HPS made spacers for various volumes. so custom rpm bands can be achieved.

 

just heard from another swapper.

i sent him a link to this thread as well as given him the heads up on the latest HPS news. he sais he is part way through the swap now, and is looking for help. I hope he finds his way here to learn from this thread like many of us have already done.

 

I'll have to measure mine at some point soon but I'm estimating it's around 4.25L in the common plenum and the runners are pretty good size with a nice taper to them. My runners are pretty short but I'm hoping to bias the power to the higher RPM's a little so it's more streetable for around here. Our roads are for azz and it's easier to deal with having to cross 2K rpm for power than having an over abundance at 1200rpm.

The HPS intake will almost certainly make the 325 mark and with the improved runner entrances, exits and taper it should flow really well for motors up to about 6K rpm. It's definitely going to be a cam optimized intake. There's just no way to take advantage of all the extra capacity wtihout a beefy bumpstick pumping the poppets. Maintaining torque is the easy part wtih PI heads. The semi-shrouded valve and super deep stroke keep intake velocities very high from right before the injector to the chamber. Of course all of the overbore and porting and such type mods will lessen that velocity a bit, it's never gunna get unbiased from the tq side in the 2v application. That's the reason I like it so much.

 

well, then i'm gonna do the long tube headers and thentune it with the adapters and pi intake.. i'll re dyno it after i get a hps intake...

 

Count me in on the 5.4 specific intake from HPS. It would probably persuade alot more people to go through with the swap if something like that became available too.

 

sorry to use up wasted bandwidth, but i just noticed illwill has 330 posts.

 

well since i'm bored .020" over i'll celebrate at 333.....

 

im in the middle of the 2v swap right now.. and ive actually kinda been stressin... not for the work, so far its been easy as ****.. just the out come of the whole project. ive just read hella **** on people baggin on the 5.4 swaps... for those of u who have finished, how do u guys like it it? were u definetly happy with the swap?

 

from what i can gather, the results are great.

you will be faster than stock and lightly modded 4v cars, and just as fast as the LS1 boys with a relatively stock 5.4l.

if you are using a heavily modified 5.4l, the 4v boys will need some good ol' forced induction to keep up, and all but the strongest of built LS1 cars will be seeing your taillights.

if you can handle the torque curve effectively. traction WILL be an issue.

 

what are you doing for the intake? stock 5.4l? adapter plates and a 4.6l intake?

 

even the lowest performing 5.4 we've seen out there is WAY stronger than a 4.6. You will not be disappointed in the returns. Don't expect pretty dyno numbers. What you'll have is an abundance of power you can use at useful RPM's in any gear.

saleen s330 and myillwill both reported startling acceleration and traction problems. Let the haters hate... when you come across one rollin his 01 cobra and you lay 50 ft of rubber from a 3rd gear roll and pass him, he'll change his tune.

 

oh yeah... 333 here too. And I just turned 33... eeek. Too many 3's appearing.

 

Be glad you aren't 66 building a 6.0L.

 

i wa with my first one aith a nonpi 5.4, so this one should prove to be fun

 

i hope i'm still building things at 66. that means i've lived a happy life. or am trying to spend as much time as possible away from a bitter old wife.


speaking of 6.0l. has anyone heard of or actually sleeved a 5.4l block?

 

Sean Hyland sells a 5.4l/6.0l aluminum block. To much dollar for my broke a$$, around $2000.