Hello I am trying to do a engine swap that will bolt up to my stock 04 GT transmission. But I guess my question is why don't companies sale complete 4.6 crate engines turn key ready? or if you guys know any please let me know. Thank you.
complete crate 4.6 engine
RichRWB3
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Hello I am trying to do a engine swap that will bolt up to my stock 04 GT transmission. But I guess my question is why don't companies sale complete 4.6 crate engines turn key ready? or if you guys know any please let me know. Thank you.
Because the same long block could be used in multiple applications. For example with just a few changes that same Romeo 4.6 SOHC iron block with PI heads could be used inside a:
Things like swapping:
Are considered part of the "installation".
OBTW, the fact that the same long block is used for multiple "applications" also makes it possible to swap in the motor from a PI Panther class car into a Mustang.
- Grand Marquis
- Town Car
- Crown Vic
- Some F150
- Some SUV's
- and not to mention Mustang GT
Things like swapping:
- flex plate
- flywheel
- intake
- exhaust manifolds
- oil pan
- front belt accessories
- starter
- ignition
- fuel induction
Are considered part of the "installation".
OBTW, the fact that the same long block is used for multiple "applications" also makes it possible to swap in the motor from a PI Panther class car into a Mustang.
OMG this is so frustating. I was just looking for something simple. I guess I will have to buckle down and buy everything separately. The block is no problem but I dont know what all a need for the heads. I dont even understang this whole compression thing.
I'm not sure that even a seasoned professional would consider any motor swap super "simple". The devil is in the details. However IMO you may be over thinking this. A crate motor comes with heads. Otherwise it would not be a "long block". It may or may not come with the intake. It may or may not come with an oil pan or any number of other "bolt on parts". This is where reading the fine print is important when purchasing a crate motor.
But IMO anybody that is capable of swapping a motor should be able to handle swapping some "bolt on" parts.
All SOHC Romeo 4.6's with the PI heads come set up with the same compression ratio. Other wise the motor would not interchange.
It also might help us to help you if you gave us some more information on your project. For example normally when swapping a motor the old parts are available. It's not normal to re-buy all of those parts. It would cost a fortune.
IF you truly need all of that other "stuff" for your project, then consider a whole salvage yard motor as they normally come complete. But even then it may be necessary to swap some parts from the old motor to the new. Try searching at car-part.com for some local salvage yards with 4.6's for sale.
But IMO anybody that is capable of swapping a motor should be able to handle swapping some "bolt on" parts.
All SOHC Romeo 4.6's with the PI heads come set up with the same compression ratio. Other wise the motor would not interchange.
It also might help us to help you if you gave us some more information on your project. For example normally when swapping a motor the old parts are available. It's not normal to re-buy all of those parts. It would cost a fortune.
IF you truly need all of that other "stuff" for your project, then consider a whole salvage yard motor as they normally come complete. But even then it may be necessary to swap some parts from the old motor to the new. Try searching at car-part.com for some local salvage yards with 4.6's for sale.
ok Here I go lol. I have a 04 GT stock with a 2.1L kenne Bell on it. The shop I want to use is suggesting a new short block. I am looking at the Ford 5.3L short block form AmericanMuscle.com.(https://www.americanmuscle.com/ford-performance-53l-modular-stroker-shortblock.html). They told me I can use my stock PI Heads with Cam and that will be fine. I just dont know though. I dont want to spend $10,000 and have my engine restricted because of stock heads. They quoted me $2700 to get them ported and polished but they also said I dont need it.
This thread seems to have taken a different turn. Started out asking about a Crate motor (long block) now talking about a short block.
I'm assuming that you are asking for advice from the Mustang community. If so you are likely to get a hundred different answers. But If we assume that:
IF this were my project:
My recommendation. Start your project by stating YOUR goals in order. A reasonable project must have a budget.
Give your goals to your engine builder and let them do their job. Don't rely toooooooooo much on recommendations from the Mustang community. Very few of us out here have DIRECT experience building high end motor combinations such as these.
I'm assuming that you are asking for advice from the Mustang community. If so you are likely to get a hundred different answers. But If we assume that:
- you are looking for something simple
- You are frustrated with the multitude of choices
- you are getting conflicting advice.
- you are concerned about prices
- your head is about to explode.
IF this were my project:
- I would not use a stroker motor in a BOOSTED application. Stroking is generally more effective for NA applications. Let the supercharger do it's job.
- for the same reasons I wouldn't put excessive emphasis on making power via expensive head porting in a BOOSTED application.
- I would go with "proven" combinations. To that end I would use a standard 4.6 combination that KB has experience with. Lean on KB for their recommendations. This is their area of expertise.
- Are you looking for a warranty for your project? IF so, then combining a new long block with your heads won't have a warranty other than what the shop might provide.
- I would confirm the shop's experience. Consider seeing some of the shops other BIG projects. Are the prior customer's happy?
My recommendation. Start your project by stating YOUR goals in order. A reasonable project must have a budget.
Give your goals to your engine builder and let them do their job. Don't rely toooooooooo much on recommendations from the Mustang community. Very few of us out here have DIRECT experience building high end motor combinations such as these.
You can always go this route:
https://www.jasperengines.com/
Take yours out, put the new one in. They provided all the rebuilt engines for the US Postal Service in my area. We used them for years.
https://www.jasperengines.com/
Take yours out, put the new one in. They provided all the rebuilt engines for the US Postal Service in my area. We used them for years.
First. I'm not an expert high horse power car builder. But I did stay in a holiday Inn once. 0
Like many of us out there I read a lot and I'm a big Mustang fan.
But I didn't not say it was a "bad idea" to combine a stroker motor with a super charger. However in general, all things being equal, super chargers are normally paired with "square" motors.
Like everything in life building a fast car is a series of engineering "trade offs". Trading off factors such as:
If $$'s really aren't an issue, then select "all of the above" and build the blown stroker motor with a custom cam and ported heads, custom tune. Rock on. Don't look back.
But if $$ is important, then wouldn't it make to most sense to pick a combination that yields the most HP for the least $$'s? Don't focus too much on the specific parts and ignore the WHOLE of the combination. Remember that the motor is really part of a system.
That's why it's important to list the project goals IN ORDER. For example if cost and reliability are more important than HP that likely will affect the choices made.
I hope your "take away" from this is to rely on the real world experience of the engine builder you have chosen to do the work. After all it's their professional experience that you are paying for. Right?
Like many of us out there I read a lot and I'm a big Mustang fan.But I didn't not say it was a "bad idea" to combine a stroker motor with a super charger. However in general, all things being equal, super chargers are normally paired with "square" motors.
Like everything in life building a fast car is a series of engineering "trade offs". Trading off factors such as:
- Horse power
- cost
- weight
- reliability
- complexity
If $$'s really aren't an issue, then select "all of the above" and build the blown stroker motor with a custom cam and ported heads, custom tune. Rock on. Don't look back.
But if $$ is important, then wouldn't it make to most sense to pick a combination that yields the most HP for the least $$'s? Don't focus too much on the specific parts and ignore the WHOLE of the combination. Remember that the motor is really part of a system.
That's why it's important to list the project goals IN ORDER. For example if cost and reliability are more important than HP that likely will affect the choices made.
I hope your "take away" from this is to rely on the real world experience of the engine builder you have chosen to do the work. After all it's their professional experience that you are paying for. Right?
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If you want supercharged engine, just build a forged rod/pistons long block. Like WM Burns said, let the blower do the work. If you want a natural aspirated engine, I would buy the modular big bore 3.700 inch. IMHO I wouldn't want a stroker because of the extreme angles the rotating assembly cycles through. If you get the big bore, all you have to do is buy bigger pistons, and I would upgrade the rods while you're there. The factory crank is good, and way better than most people give it credit for. The big bore block also has the same water passages for each cylinder so it's cooled better, and extra gussets down low so it will hold more power if you do want to throw a lot of boost at it one day.
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contact L&R in sante fe springs, ca... they can prob get u a nice long block
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