5.4/5.8L intakes

[Willis_98GT]

i cant figure out which intake i want to run on my new motor so i want to get some opinion, i know their isnt very many and most people just adapt their 4.6 stuff which is what i wanted to do originally but i cant seem to figure this one out..

i know theirs the hps one and so forth but i want to know what the other people run, this is the last thing i need to buy to complete the stroker..

 

[DropTopPony]

You building a 5.4 2V?

If yes the HPS and maybe a custom sheet metal intake are the only options other then plates and 4.6 intakes.

 

[r3dn3ck]

What combo do you have? Screw what other people use... use the right one for your combo.

The HPS is intended for NPI/PI headed cars that want to spin to about 5500rpm (PI heads) to 6100rpm (TFS heads). For mostly any NA 5.4L mustang application this is the ticket for now. It'll flow with TFS heads and we've seen 375rwhp through it on stock TFS heads and a nice cam. Fits under a stock hood and bolts right up. 4.6 Fuel rails usually bolt up just fine.

I have a 5.4 with port matched heads and Comp XE270 cams, 10.5:1 and longtubes. I use the HPS intake.


MMR's solution is ONLY for blower/turbo cars and I think it's a crappy hack of a solution with too much of a hood clearance problem and a fuel rail compatibility problem (uses Lightning rails).

Logan could make one of theirs which is totally pimp but it's unthinkably expensive and has its own hood clearance problems and more fuel rail issues.

Edelbrock Victor Jr. 4.6 and adapter plates. Crap solution. Wrecks fuel delivery. Please don't do this.

FWIW, MHS (modularheadshop) is putting the finishing touches on a 5.4 2v single plane type intake that is for cars with TFS heads (stock or ported) or heavily ported PI heads and cams over 230deg duration. It's for those guys that want a 6500rpm+ shift point. You can see early CAD drawings of it at http://www.modularheadshop.com/Articles/54%20intake.htm

Oh... BTW REALLY IMPORTANT! If you want a HPS 5.4 intake, you better get it now. He's got a batch ready to ship and he doesn't make them very often. Most of this run is spoken for, get yours while you can.

 

[Willis_98GT]

damn, still confused..

 

[Willis_98GT]

What combo do you have? Screw what other people use... use the right one for your combo.

The HPS is intended for NPI/PI headed cars that want to spin to about 5500rpm (PI heads) to 6100rpm (TFS heads). For mostly any NA 5.4L mustang application this is the ticket for now. It'll flow with TFS heads and we've seen 375rwhp through it on stock TFS heads and a nice cam. Fits under a stock hood and bolts right up. 4.6 Fuel rails usually bolt up just fine.

I have a 5.4 with port matched heads and Comp XE270 cams, 10.5:1 and longtubes. I use the HPS intake.


MMR's solution is ONLY for blower/turbo cars and I think it's a crappy hack of a solution with too much of a hood clearance problem and a fuel rail compatibility problem (uses Lightning rails).

Logan could make one of theirs which is totally pimp but it's unthinkably expensive and has its own hood clearance problems and more fuel rail issues.

Edelbrock Victor Jr. 4.6 and adapter plates. Crap solution. Wrecks fuel delivery. Please don't do this.

FWIW, MHS (modularheadshop) is putting the finishing touches on a 5.4 2v single plane type intake that is for cars with TFS heads (stock or ported) or heavily ported PI heads and cams over 230deg duration. It's for those guys that want a 6500rpm+ shift point. You can see early CAD drawings of it at http://www.modularheadshop.com/Articles/54%20intake.htm

Oh... BTW REALLY IMPORTANT! If you want a HPS 5.4 intake, you better get it now. He's got a batch ready to ship and he doesn't make them very often. Most of this run is spoken for, get yours while you can.

could you go more indepth into why the fuel wont be correct on the victor jr, is it just because of the fact that the adapter plates increase the distance that fuel travels from the injector?

 

[r3dn3ck]

basically that's it...

here's fuel injection methodology 101:

In modern injected engines (excepting direct inject) the fuel spray is aimed at the back of the intake valve. The ECU is set up with timing and pulse-width settings to fire the injector against the back of the valve while it's closed. This helps to cool the intake valve and to vaporize the fuel charge.

When you add the adapter plates the fuel injector sprays the living hell out of the floor of the intake runner and the fuel doesn't properly mix, meaning you have to dial in more fuel in the tune to compensate and your mileage and emissions go to total hell.

There's no good treatment for that issue in the tune. Moving the injector firings later or earlier doesn't help (actually makes other problems much worse, like valve temps) and so you're stuck with 8mpg in the city and 17 highway which is pathetic, not to mention the power robbing nature of adding excessive fuel and the potential ring sealing and lubrication problems from liquid fuel running down the cylinder walls. Simply putting a proper manifold on it with the injectors where they should be restores your mileage (think normal mustang mileage, 17city/25 highway) and you get the ease of bolt-on simplicity, all your stock stuff and bolt-on's still work and you can usually use your stock fuel rails.

Do this one thing just because I told you it's the right thing to do and you'll thank me later. Order your HPS intake. I don't make jack if you do or don't, my interest is you doing this right and being happy with what comes out of it.

 

[Willis_98GT]

I won't use the victor Jr. my main purpose was mpg and I just was trying to get a opinion from someone that's actually done this so I appreciate it man. Thanks.

 

[r3dn3ck]

Someday in the not extremely distant future there'll be a single plane for 5.4's (check out the intakes page on modularheadshop.com). That will be much better for high end motors and power adder motors. Till then, the victor is best left on 4.6L motors. It's a shame too... if it'd work better the plates would be a great cheap solution.

 

[Willis_98GT]

The shop did the victor jr.. they already had one there, and they swear up and down that it wont affect mpg.

but i do understand what u said redneck, and i feel that it will work out.

ordering the on3 kit today/tomorrow

 

[1996mustangGT]

The hps intake is a nice piece man you'll like it. Make sure to put a coolant. Crossover in the back when you get it

 

[r3dn3ck]

They wanted to get that piece of crap off their shelves it would seem. Hope they gave you a good price. When you sell it you'll be able to get most of your money out of it.

What are they doing about fuel rails and elbow and all that jazz? That adds like 450 bucks to the cost.

 

[Willis_98GT]

its free, my car will be a sponsor car, and a representation for the dallas/ft worth area for the on 3 kit too.

hey redneck, what do u suggest for headers.. thats my last confusion about this.

 

[1996mustangGT]

Will, for the 5.4 you can use and 4.6 shorty, and if you want to go longtube hit up ftp performance out of Fl.

 

[r3dn3ck]

so far only FRPP and JBA have fit without much/any issue on shorties. Stock 4.6 logs work too. 4.6 longtubes cannot really be easily modified to work. sucks but that's life.

1996 nailed the rest of that detail.

 

[Willis_98GT]

i doubt shortie headers will benefit from a turbo. im not sure

 

[r3dn3ck]

shorty headers and stock logs are how turbos are done. You typically face the exits forward but that's about that. Some odd kits like STS that mount in the rear are of course exceptions to that rule. In general you want shorties or cast iron logs with a turbo. They keep the distance to the turbo short and the heat inside it. That they merge really soon after the head doesn't hurt spool-up either.

 

[Willis_98GT]

shorty headers and stock logs are how turbos are done. You typically face the exits forward but that's about that. Some odd kits like STS that mount in the rear are of course exceptions to that rule. In general you want shorties or cast iron logs with a turbo. They keep the distance to the turbo short and the heat inside it. That they merge really soon after the head doesn't hurt spool-up either.

Yeah that makes sense, im just not sure if this kit uses foward or standard shorties.