This will be long.

I always plan far in advance all my modifications to my cars/trucks in order to do them in a "correct" order. At our shop we are putting a 347 stroker kit into a Fox body mustang which weighs about 2300lbs (gutted, caged, and track legal to 10 seconds). It got my curious about possible stroker kits for the 5.4L 3v. Currently none are available so I started looking into motors and such. I came accross built short blocks (crank, pistons, rods, engine block etc) and saw some that could withstand 1500-2000HP. I then begun to brain storm ideas.

According to some websites that calculate boost which brings up my questions.

1) Is it possible to get 500hp N/A from a 5.4?
2) What is the most power racing transmissions today can handle? (4R75)

The real goal would be 500HP on the motor, then add 15lbs boost with my current Whipple roughly making 1010HP.

Im open to any ideas and comments. I believe I would start with a Ford GT block, fuel pump, and injectors. (Some have reached over 1000HP with stock fuel and block with twin turbos).

 

with a trans the horespower isnt the factor its torque. the 4r70 can take 700ft/lbs of torque, the 4r75 can take 750ft/lbs of torque, the 4r100 can take 1000ft/lbs of torque. get it?

 

I know a friend of mine has a completely built 5.4 lightning motor waiting to go back in his truck. If I remember correctly he got the 3v heads and put on it also. I think his hang up right now is his selection of superchargers that work with those heads. I coul db ewrong but I am going off of memory from listening to 3 hour put me to sleep conversations about it.

 

Torque wont be insane being the motor will not be turbo'ed. 3v Heads are what are currently stock on my truck. If I got a GT block I may have to go 4 valve.

 

I was wondering the same thing earlier today. I was thinking if I ever had a major problem with my motor I would rebuild it to be really powerful, but then I started wondering how the tranny would take to that. Or how you even go about getting over 600HP out of a 5.4L.

 

1. it is fully possible to EXCEED 500 hp with this motor. MMR sheet intake and ported 305cfm heads with rods/pistons/cams will easily make 500hp.

2. the NVH block we have can handle 1250hp max. the bores start moving around after that.

3. going from 550n/a to 1050 with 15psi wont happen with a whipple. doubling your hp with 2bar psia is theoretical. with turbos (twin 60's) at 13psi has yielded ~750rwhp. go to modular fords in the swaps thread and look up 4.0 to 5.4 3v swap. you will probably need 20psi to get there. but that's just a guess.

4. if you go that far then a large frame garrett say a gt40 or larger and run boost to the block's limit you'll get there. (1250hp)

5. no need for a GT supercar block. its a waste of many many thousands. an iron block is all you need. look into the expense of converting it to regular street use. waste of dollars. use the money for the billet rods/pistons you'll need.

-bill

 

Irons1n, try www.paschalperformance.com

They have a alum GT block with the big bore and a stroker crank for a massive 6.36L. You can get it as a short block, or a long with 2v or 4v heads. I don't see why they could not set it up for 3v heads.

The Dec. issue of MM&FF did a test on bone stock 4.6 3v production short block and installed CNC ported heads, comp cams, and phaser locks. It produced a whopping 451 crank hp on the dyno. If that can be achieved on a 4.6, I see no reason why a built 5.4 3v with a big bore kit, a stroker crank, or both cannot get 500+ at the crank.

 

That was actually another thought to, Perhaps staying 8PSI with the whipple, and getting the STS kit and going with X amount of PSI with the turbo. I would probably run true dual exhaust into a Y pipe for the turbo and have 1 large exhaust pipe out. I believe the STS system is a 60 turbo?

Im not real sure what sort of compression Im looking for either, I want a block that will handle 1500HP so I can run 1xxx safely (crank HP). I figure I would get the best pistons, crank, rings, rods etc that I could acomplish such motor. The heads I would port, polish and all that good stuff to see if I could stick with my stock heads to safe me from buying new ones. Cams I would go something that is streetable (being this truck is a daily driver) but something that I'm not cutting corners on. With a whipple and possible turbo a Cam can be quiet extreme but Id like something that can atleast idle 50-100% of the time. If I have to play with the throttle at lights randomly thats no biggie. Of course I would have long tube headers, maybe no cats, and perhaps a STS turbo.

Trans I would probably purchase a full race trans and torque converter. Being a daily driver Im not sure what I would do about stall, but the truck would see the track every winter.

Rear end Im not to worried about, Ill buy U joints by the dozen and gears will depend on what tires I use.

Again, I dunno how well a whipple will handle 12PSI or whatever of a turbo going into it.


Stroker kit would be awesome with the 6.36L, I could not find any stroker kits for the life of me today

 

aftermarket pumps. no whipple. if you insist on screwing it, there are whipple manifolds out there. good luck getting to 1000hp with it.
you'll need ginormous injectors (83#)? and an injector driver.

 

the iron block will run 1000 hp for years.

 

properly sized (exhaust a/r)twin 62's will eliminate the need for the whipple. but you can use the whiupple lower for your turbo intake manifold.

 

I dont know much about injectors but I was reading some of the diesel guys who have over 1000hp are using the injectors off a tractor of some sorts, which I assume would count for being "ginormous" but then again it did say they were 15 grand. But I could be completely wrong! Just something to look for.

 

Well Id like to keep the whipple as it was 5 grand (hah). However, a STS turbo goes directly into the throttle body which I would have go directly into the whipple. Id probably run a ford gt fuel pump to huge injectors with a injector driver like you said.

Im now wondering what 8 PSI on a stroked 6.36L would make power wise.

Injectors in a diesel are VERY different then in a Gas motor. For huge gas injectors its probably 400-600 a set of 8.

 

JDM has a set of 60# for $465

 

I dunno how big Ill need to go?