man am i just slow or am i missing entire posts? You guys are having intakes made too? WTF? (wow thats fantastic). SOHC & DOHC have the same intake port right? are we talking a special FI intake? where can i find out about what their making for you? How much, benefits.. ect?

 

2v and 4v have way diffrent port and intakes. HPS has been laboring for over a year to get these intakes made for everyone doing the swap. after the 3 prototypes are delivered i believe it won't be long before the rest of you guys will have the opportunity to get one.

 

4V intakes have been out. Sullivan is the place to go for those.

As for Kooks, I doubt we'd be going into the trouble of having headers made if Kooks already had them out. However, Kooks does do custom applications so if you are by Long Island, that's the place to go.

 

how much for thier headers?

 

Thanks but I just sent the cash to Nightwing, probably go pick up a cheap junkyard PI intake next week. I should go ahead and swap the motor before I paint the car, so I dont risk messing up the paint. But that'll make the funds tight.

 

I thought the same thing too... but it looks like they have them, .. I don't know and they were closed today so I'll call monday and post what I find out. But I'm sure you're right, there has to be a nasty catch.

Their long tubes were just around 1k, and they have a kit back to the X pipe for just under 1.2k ... thats what I saw online at the website i posted. I'll call monday.

 

The Sullivan is not for most applications.

 

What applications is Sullivan for, what others make a DOHC intake?

 

It's good for high rpm n/a motors and "kinda" good for turbo motors. A Sullivan intake's motor will have very little torque unless it has high compression and cams that are spec'd specifically for the intake.

[FONT='Verdana','sans-serif']Navigator: (98+ Lincoln Navigator)
These 5.4L DOHC heads feature essentially the same intake port design as C heads, however they have a much larger intake port volume than 4.6L castings. Despite the fact these heads feature a relatively small exhaust port, the extra intake port volume could be very beneficial in helping fill a motor of greater displacement—think 5.4L. Expect slightly better midrange torque, and sub 8000rpm horsepower production than even C heads, however the larger intake port size leaves a slim selection of intakes to choose from when utilized on a 4.6L block. Forced induction fans take note, Navigator exhaust ports feature a thicker exhaust divider (while keeping the same overall exhaust port size as B,C, and FR500 heads) that allows coolant to circulate through this vital area. Conversely however, the larger divider can also hurt flow by utilizing additional space in the port.
The real downside to Navigator heads, when used on a 4.6L based motor, is the severe limitation they impose on intake selection. The physically larger 5.4L heads don’t leave a lot of room (when installed on a 4.6L block) between them for an intake plenum to sit—though they do bolt right up. Remember that since Navigator intake ports are essentially clones of those of C heads (just on a larger scale), they too suffer from the same intake port flaws that plague the earlier tumble port design--no short turn or floor in the throat of the intake port.
The Bottom Line: The extra port volume the Navi’s possess could be very beneficial in filling a motor with greater than 281 cubic inches of displacement, or in high rpm N/A street/strip or boosted combinations. Fans of boost should remember the cooled exhaust port divider. Lack of intake availability is the real downfall of this otherwise wonderful casting.

Stock Intake Choices: None (4.6L), 98+ Navigator (5.4L)
Navigator head dimensions: Combustion Chamber: 53cc, Intake Port Vol.: 184cc, Intake Port Entrance: 2.290”x1.400”, Valves: 37mm Int., 30mm Exh.
[/FONT][FONT='Verdana','sans-serif']
‘03 DOHC head: (‘03+ Aviator, Marauder, Cobra, Mach 1, Australian Boss 260/290)
Featuring a nearly identical (though 17cc larger in volume due to the fact that they are also used on the much larger Australian Boss 260/290 5.4L DOHCs) intake port to the FR500 head, but combining it with a newly designed, larger and more rectangular exhaust port, these may be the best all around DOHC Ford heads ever manufactured. The improvements made to the intake port shape over previous years include a raised port roof and the introduction of a short radius turn in the throat of the intake port that helps assure the incoming air charge finds the combustion chamber. For those with a forced induction street/strip motor, these are without question the best heads available, and as with the FR500s, they should produce great power up to and beyond 8000rpm regardless of application. ’03 DOHC heads also feature higher quality head castings from the supplier, which is at least partially responsible for the modest increase in flow vs. earlier castings--chalk that up to Ford’s revised quality control standards.
Early runs of the ’03 DOHC head fell victim to the same #6,7,8 cylinder coolant flow problems as earlier tumble port castings. In mid ’03 Ford made a running revision to the ’03 DOHC heads that allowed for more coolant to circulate through the affected areas. A blue mark on the driver’s side head indicates an updated casting, and there are no additional revisions to the ’04 version of this design.
The Bottom Line: On all accounts these are the best modular four valve heads currently available. They combine the exceptional flow of a slightly larger FR500 intake port with a gigantic new rectangular exhaust port.

Stock Intake Choices: ‘99/’01 Cobra, ‘03/’04 Mach 1 & Aviator, ’03 Marauder, FR500.
’03 DOHC head dimensions: Combustion Chamber: 52cc, Intake Port Vol.: 177cc, Intake Port Entrance: 1.960”x1.350”, Valves: 37mm Int., 30mm Exh. [/FONT]

 

got some work done on hunters motor today.......

 

ibanez: yeah, like myillwill said, we've had this project going for quite a while. It started with me noticing the 4.6L HPS hardball'r intake was a neat design that had gotten very little press good or bad. I got one to horse around with on my 5.4 project and then I spent months porting it and testing (with a plastic bottom cover and a vacuum jig) seeing what different port entrances did to how the air behaved. After just a little bit of fiddling it was evident that this was a piece with a lot of promise and it was really a good foundation for a purpose built 5.4 intake that would be stupid easy to install. I even have a nitrous kit designed for it that injects directly into the runners through the bottom cover so it's quite stealthy (other than a bottle in your trunk). One day I'll finish the first running unit and try it out on a running motor.

 

 

thanks for the background... and thanks for the info na_svt! it seems like I'll give up following what you guys are doing with your SOHC stuff because non of it really applies to my DOHC. So it looks like all SOHC stuff is geometrically similar and the same with all DOHC stuff...

heres a tid bit of WTF. i finished installing the xmission the other day and have been driving it around town this weekend. The clutch has been all jacked up. SO increadibly hard to push down, and made a ton of noise creeking and what not. but today when i let off the pedal randomly, it slid up smooth, .. it pushed right back down smooth too... like a brand new clutch! now the cable isnt tight enough anymore but its really close and feels so different. i can't drive it anymore until i get a firewall cbl adjuster, but it just feel so different.

 

oh, followup... I have pics and stuff and want to document the T45->T56 swap i did in my 98 GT, where is a good forum to put that in?

 

Holy crap... props to you for that. I wish i had a garage to play with stuff in.. heck i wish i had the know how to play with stuff in that caliber.. props man.

 

So is HPS making a 5.4 DOHC intake as well??? or not??
I might be kinda sorta interested if they did... actually id probably throw cash down on one now....
As long as it wasnt killing my low end torque as bad as the sullivan, and i wasnt sacrificing too much up top...
A low profile intake plenum to match the 03/04 cobra throttle body.... **** id buy it up....

 

me too... cash money today friend.

 

Saw this website, might be an option for some of you for intakes.

FRP Racing

 

not a bad price for a custom sheetmetal but i don't see them being very good for a street motor, you would need a huge cowl in order to fit an intake with streetable runner length under the hood

 

So R3D or HPS,
is HPS making a 5.4 DOHC intake???
If so will it have a water cross over?
What kind of plenum will it use... will it be like the sullivan with a low pro style? That would be sweet... especially if you can keep the stock alternator position....

and does it come in polished

 

for 5.4 DOHC people look at this, if you are using 03/04 cobra heads or navi heads,
you can have a GT500 setup, they make a intake to match our intake ports instead of the Supercar GT heads, and GT500 heads YAY!!!
bad side is the price of the kit....

http://norcom.net.au/~bpt/BA-BF_54L_M122H_pd_SCHGR.htm


And for just straight intakes i found this there too...
http://norcom.net.au/~bpt/boss_r_plenum.htm

just thought i would pass this along...

 

There are already too many 4v intakes on the market. I don't really see HPS being able to substantively add to what's out there already. 3v would probably be the next market if I were running things but there are other questions there like do you do one for 99-04 3v conversions or just 05+? etc...

I've already emailed him. He's game to make just about any intake for <800 bones. His welding quality is a matter of question though.

 

As far as the 5.4 intake aftermarket goes there is only the Sullivan and for the 4.6 4v there is the Sullivan and the FR500.

 

there's also MMR and all the other navigator lower based units. There are just so few 4v 5.4's and already choices on the market. The big deal for HPS with the 2v intake for 5.4 was there was and still is no competition. It's the only player. If I can get bob to work on the 3v intake HPS will be the only player there too.

 

I forgot about the MMR intake but it's not worth a damn anyway; huge plenum and short runners make it good for boost only. I don't know of any other Navi based intakes and even of there were any I'd steer celar of them all.

I like the idea of a 5.4 2v better anyway.

 

agreed. I have a good plan for a longer runner 5.4 intake. If I get a hair up my **** I may just have that FRP racing guy whittle out a prototype.

 

well, looks like i will just stick to my sullivan i guess...

This is a 5.4 DOHC build... with the sullivan it looks like... man that thing is frucking tall... i got this crazy feeling its not going to fit underneath the hood... even with a 1/2 spacer i dont think it would... (not stock hood i got a 2000 Cobra R SVO hood...)
http://www.modularfords.com/forums/s....4+dohc&page=2

Think i might have to buy a different hood and just sell mine... and get a true Cobra R hood...
or a Cowl...

 

ohh, and if you are thinking fo making an intake... thats scary lol
im sure you have done enough reading and thinking that it might turn out to be fairely decent...

And his welding does look kinda rough... but, can always grind it down and smooth it all out, and then get it powdercoated...

 

i've been trying to go back and read this forum from the begining and somewhere i read r3d (i think) say there were 5.4 DOHC intakes all day long... can anyone list other 5.4 DOHC intake options other than Sullivan?

 

Sure here are the ones i know off the top of my head

Boss 290 intake (and the whole series of these the 315 upper even they all use the Boss R lower)
Sullivan
MMR sheetmetal
Navigator
Kar kraft has 2
modulerpowerhouse used to have one but i cant find it (supposibly had one)
A few custom built ones as well.
And i know im forgetting one more thats a player...