No more 5.4? Why?

 

The 5.4 is still there but im going back to turbo. I dont know if anybody has done it before but im going with the on3 on the 5.4. I liked the on3 kit when I did it to my 99 Cobra but I will have to weld an extra piece on the passenger hot side pipe since its a wider engine.

 

Nice.That will be a good set-up. I want to put a turbo with my whipple, but that just too much for a street car.

 

I'm thinking of using one of their kits in the fall. I haven't decided if I want to go turbo yet or not.

The block should handle it though.

 

Could the 5.4 fit in a '98 GT? I was going the PI head swap route, but if I could put a 5.4 in it I would, especially if the cost is justified by the extra performance! I gave my wife my bone stock '85 GT and she smokes my '98 GT convertible! There is no way in hell I can hold my head up now! Thanks, Rambo

 

ya sure can rambo.......slidell huh....i live in picayune lol.

the fact you have a 98 model justifies the cost even more cause you will get better heads and more displacement.....just make sure u get a pi 5.4

 

...

 

Rambo: I've got a built 5.4 with ported heads and cams and a fidanza aluminum flywheel for sale. Your 98 will feel like a completely different car no matter what with a 5.4. Your wifes car doesn't stand a chance.

EDIT: And ibanez is saying yeah, it definitely works. he's got one in his 98.

 

here's another sn95 but with a SOHC 5.4:
http://illwillinc.com/97mustang.htm
illwill's good people... iirc (lol)

 

i need to get out of the office and go get it done. there are a couple sets of half finished headers and other parts sitting at FTP...

 

Well since the Tork Tech kit is pretty much sold I will be going turbo now. Im sure im going to run into some problems like the hot side rubbing on the tire since the engine is wider. My main concern now is if I used a lightning lower intake manifold can I reuse my Fore rails I used. They are meant for the 2v 4.6 but used it just fine with the 5.4 Tork Tech kit.

What about the coolant crossover from the lightning lower? I didnt see a bung in there for the coolant sensor. I appreciate any answers. Thanks.

 

lightning rails are 5.4 specific, you won't be able to use your fore rails.

for the 2nd coolant sensor crossover, you'll have to drill and tap or relocate it.

 

Meh, Im just going back with the Hardballer intake. Little bit more money but the no hassle will be worth it. I wish I had kept my old one . I also think that the driver side hot side of the piping will touch the tire since the engine itself is wider. I'll probably have a shop bend it inwards about an inch or so to get the perfect distance.

I know im going to have to cut and weld the crossover hot side pipe about an inch or so but Im not sure what kind of piping I should weld in there. Its 304 stainless 16 gauge steel so Im not sure if I can use mild steel like what 90% of the shops have here. Any guys know about that type of stuff? Thanks

 

You are going with the on3 kit again right? I remember reading somewhere that their new kits are mild steel unless you request the 304. Might want to give them a call.

 

Their new kits wont work with my MM k member plus I already bought the hotside with wastegate and intercooler for 550 shipped.

 

Oh ok. Did their old kit work with the MM k member? I have been looking into the on3 kits for a few days now and hadn't seen any mention of k members other than QA1 and UPR. I am considering going with the 2v kit and UPR k member, A arms, and coilovers. I really prefer the MM parts though.

 

The UPR k member sucks for the on3 kit. We had to remove the sway bar because it would not clear the piping on the on3 kit for my buddy's 02 GT. His is the new kit and it was a little different than mine when I had it. Supposedly they designed it for the granatelli k member which is just a mock up of the maximum motorsports k member so it should fit no problem. My problem would be that the engine is wide so that im going to have to modify it a little bit to make everything work.

 

R3dn3ck, what are the specs on your 5.4 and how much? Thanks, Rambo

 

never seen this go this long without someone posting something so i figured i would wh00t!

 

I will be keeping an eye on your build. I am interested to see how everything fits together.

 

hey guys been a while since ive posted. going another route with my 5.4 4v project. i just posted a set of crower stage 3 N/A cams up in the classifieds (these are dohc cams) if you want them id drop the price a bit! pm me if you have questions.

 

any news from 330sprayed...does he have any na track times....did he figure out his fuel issue? Has he beaten 380rwhp na? I am trying to decide between the bigger bore 5.0 iron block or 5.4 iron block....I want to spin to 7300 rpm either way, I'll be using my Bullitt intake in both cases....It's cheaper with the 5.4 but I'll need a stage 4.5 cam. With a 5.0, i could probably get with stage 3 cam. which one will give me a broader torque ? I have stage 3 PI 2v heads in the works....

thanks...

p.s. at power range are 30lb injectors good?

 

Ok guys for the past 6 months I have been getting my swap done. I am almost done and have a question or two about the IAT2 sensor.

have an 02 saleen that i am installing an 07 shelby motor in. I have converted all of the wiring and ECU to one out of an 03 cobra. My question is about the IAT2 that the 03 cobra harness and ecu are expecting to see. I know there are four wires on that sensor, 2 for temp and 2 for boost reference.

I was told by my tuner he could tune around not using the 2 wires for the boost reference but I still needed to to use the IAT2 temp portion of that sensor. I was going to just hook up the 2 wires from my 03 cobra harness pigtail into the factory 07 shelby intake temp sensor. It is located on the lower manifold so it would be reading charge temp. It is a different sensor similar to the IAT1 found on the cobras.

Do you suggest hooking up pins 3 and 4 from the 03 harness into the shelbys sensor or do you think it would be better to just take the IAT1 plug on the cobra harness and plug it into the shelby sensor on the manifold?
Sorry for the long message but any help you can give me would be great!
Thanks
Jeremy

 

I am going to put a 5.4 into a 2000 GT with 50,000 miles but need to know what 5.4 2v engines will work? What year are they power improved? It will take a new intake, exhaust work, and pcm programming, is that it? I am going to get a 5.4 from the Junkyard and do no mods just throw it in.

 

Will a Cobra R intake work on a 2v 5.4?

 

Thanks for keeping it alive. I've been busy on a few projects.

Only 1 IAT is important, the post boost temp. The ambient air temp won't really matter as far as the tune goes but IIRC you should use IAT2 as IAT1 by relocating IAT1 to IAT2. The delta in temp is unimportant. As the blower spins up and heats the air in compression the computer will need to know how hot it's getting to pull the right amount of timing. Ambient IAT is totally unnecessary for that calculation.



00 and up all have PI heads. Some 99's appear to have them but I bought one that had NPI's on it so do check before you buy. My motor is for sale... 10.5:1 compression, forged bottom end. You can have the whole motor for 2500 shipped. Cams have some surface rust from sitting (covered) but no pitting.

You'll also want some bigger injectors. I recommend starting with 30lbs units.

No. Cobra R is a 4v motor that is close to unique. The Boss 290 intakes work on some heads (GT500 IIRC).

 

I ended up finding out which two wires I needed to hook up for the IAT2 so I will be able to run that and the IAT1. Shity thing now is it wont turn over. I have checked the every fuse, relay, continuity, grounds and still nothing. The car started fine before the swap so i doubt it is the ignition switch.

One thing I know is I am not getting any voltage at the starter signal wire when the clutch is pushed in and the key is turned?!?!?!?

 

I am going to be assembling my block throughout the next couple days. Just need a little advice here and there. If anyone has a writeup, that would be awesome.

Do you guys think I need to get a new tune from my 2v tune to break in the motor with? I'm thinking I probably will with my fuel setup and everything.

Edit: one more thing. I got my cams but I don't know which ones go where. How can I tell where to put them? They're 98 cobra cams.

 

Sorry guys, been away for a bit.

Progress so far:

The motor is in (despite a mishap that involved running over my assembled manifold ). After sitting around for 1.5 years, the fuel pump decided to die, so I picked one up today after rigorous diagnostics trying to find the source of the fuel delivery problem. (CCRM, FPDM, Fuses, IFS, PATS etc.) It turns over and fires with a little starter fluid and we checked the wiring next to the fuel pump and have 12-13v getting to it, so it should crank up tonight. I did the budget build and take my word... DO NOT GET THE PLATES- ABSOLUTE GARBAGE. Overlap is 1/8" in some places.... I will be purchasing the HPS intake VERY soon. I have stock 4.6 manis and FR shorties on the way. Anyhow, I got away for about $950 total (including fluids, gaskets, etc) so wish me luck tonight. BTW, if you're using all 4.6L accessories the tensioner belt size is 6 Rib 97.5" (it only took me 5 trips to autozone to figure this out, so I thought I'd save people some trouble) Other than that, it was a pretty straight forward and easy swap. Thanks guys for this awesome thread! Here are some pics:

 

NEW PROBLEM

I got everything in and hooked up. I used an 03 ECU and ECU harness aswell as an 03 engine harness.



After getting everything ran and hooked up the motor had no fuel at the rails. The FPDM had voltage coming in and out of it and there was power going to the stock pump. (I wanted to get the motor running first before moding the fuel system)



I chased nearly every wire I could and for some reason the car wouldnt start. I even jumped the inertia switch hoping it was bad but it wasnt. Then out of know where I have fuel pressre the car starts and runs great. I shut it down and it then wouldnt start again. I didn't change anything between it running and then not but now no fuel in the rails AGAIN. I was hopping my stock pump went bad from the car sitting for 6 months so I pulled it and powered it with a extra car battery and it runs fine.



Looking at the cobra wiring under the kick panel by the ECU on the 03 cobras there is a seperate 2 prong plug that has two DG/YE plugs coming out of the ECU harness and then plugs into the dash harness of the car. MY 02 saleen does not have this plug on the dash harness. This is the only thing different I can see between the two cars since I have changed everything (new harnesses). I know this is a long question but does anyone have ANY reason this thing would not run, then run, then not run again. I did not unplug or change anything between it running then not?!?!??!

Any help will be awesome,
Thanks

Jeremy