6.2 slight engine knock and rough idle.

[jdm_sixtwo]

I'm sure its possible to build a '2 fiddy motor for the Rap, just would be a p.i.t.a

That’s what I’m starting to think. Bottom end is shared, heads would need porting and the cams replaced, and the intake would have to be swapped, based on what I’m seeing.

 

[MurderedOutSVT]

Haven’t ever pulled one apart past the timing cover. Whatcha lookin to do with one though? 3v or 2v? I’m about to be pulling a 5.4 2v for a friend and rebuilding it for his f150. I’m assuming it’s the 5.4 3v from your 2006 FX4? I remember the wheels you posted on garage sale being FX4s.

Yeah, I'm looking into getting a new or rebuilt 3V. Also have a Eaton S/C for it like the Gen Too lightnings

 

[jdm_sixtwo]

Yeah, I'm looking into getting a new or rebuilt 3V. Also have a Eaton S/C for it like the Gen Too lightnings

Rebuild the current one. Jasper makes the vast majority of the reman engines and their quality is a little iffy from what I’ve seen. There’s a ton of aftermarket for the 3v because they share so much with the 3v 4.6 in the 04-10(??) mustangs. They make great power when supercharged, but the gen2 lightning supercharger is an Eaton M102 if I remember right. All the Eaton 6.2 raptors and the 5.4 4v GT500 ran the M112 which is a good deal bigger.

 

[Gumby]

I’m wanting to just know what the change is between the heads on the Rap and F250? I know the cam profile is different but haven’t heard anything about the heads. I’m new to 6.2s, and I’ve only done 5.4s before this. I did research before buying my raptor as to whether the engine could be swapped with a f250 in the event mine failed. All I ever saw mentioned was cams and intake.

I think the heads are different. but wouldn't bet on it. Cam for sure. By the time you swap heads spent 3 on a block with 80k on it have your heads gone through. Just send it out for a rebuild. No window rebuild it.

 

[jdm_sixtwo]

I think the heads are different. but wouldn't bet on it. Cam for sure. By the time you swap heads spent 3 on a block with 80k on it have your heads gone through. Just send it out for a rebuild. No window rebuild it.

Agreed.

 

[MurderedOutSVT]

I think I have an M122

 

[jdm_sixtwo]

I just looked it up and I was off by 10. M112 is the lightning blower and the m122 is the gt500. If you have the M122 then if I were you, find a 5.4 3V specific supercharger intake manifold, belt kit, and tune from 5 star. Slap that on a fresh 3v 5.4 and that truck would fly. Note the 3v has a different intake mount from the 2v and 4v 5.4s.

 

[MurderedOutSVT]

I just looked it up and I was off by 10. M112 is the lightning blower and the m122 is the gt500. If you have the M122 then if I were you, find a 5.4 3V specific supercharger intake manifold, belt kit, and tune from 5 star. Slap that on a fresh 3v 5.4 and that truck would fly. Note the 3v has a different intake mount from the 2v and 4v 5.4s.

Thats what I was saying. I have the entire kit. New. Everything down to injectors, I just have to get a new 5.4 and a trans rebuild

 

[jdm_sixtwo]

How many miles are on the truck? If low enough mileage and you’ve still got crosshatching I’d say fresh pistons and rings, melling oil pump, VCT lockout, and cam rollers/followers for the rebuild. If it were me I’d also add Brenspeed Detroit Rocker cams. They sound amazing and help a little with power. The 5.4 is a stout engine. The timing is it’s really only downfall. Mine had 185k when I sold it and we bought it brand new in 04. Never replaced anything besides maintenance and a pinion gear. Attached is a video of idle on a truck with a procharger and Detroit rockers. -correction, he hadn’t added the procharger in that video yet. Followed that build when he did it a few years back and almost did it to my 5.4 but couldn’t justify.

 

[MurderedOutSVT]

How many miles are on the truck? If low enough mileage and you’ve still got crosshatching I’d say fresh pistons and rings, melling oil pump, VCT lockout, and cam rollers/followers for the rebuild. If it were me I’d also add Brenspeed Detroit Rocker cams. They sound amazing and help a little with power. The 5.4 is a stout engine. The timing is it’s really only downfall. Mine had 185k when I sold it and we bought it brand new in 04. Never replaced anything besides maintenance and a pinion gear. Attached is a video of idle on a truck with a procharger and Detroit rockers. -correction, he hadn’t added the procharger in that video yet. Followed that build when he did it a few years back and almost did it to my 5.4 but couldn’t justify.

Sweet. I cant justify any of it. Either...the Rap is Procharged, D1SC. The Hearse is built to about 650 at the crank, and going to do some forced induction when I rebuild the '06