why mod motors
#1
09-09-2008, 07:35 AM
why mod motors
i was wondering what the pros. and cons of the 4.6 and the 5.4 are compared to the push rod 302 etc. why the mod motors are a better choice than the push rod and the power difference between the 46 n 54 just the all around better motor would be for power and performance for a 95 mustang i have never messed with the mod motors before is there much defference between them than the push rod motor and why pick the 46 or 54 truck or car which is the better motor to get truck or car please email me with any info thanks a lot my email mg20sm@yahoo.com
#2
09-09-2008, 11:38 PM
Good
1) They are very reliable.
2) Make more power per cubic inch than the older pushrod engines.
3) They are plentiful. The 4.6L has been in large cars (Crown Vic, Town Car, etc) since 91.
Bad
1) Most only have 4 threads per spark plug in the head which can cause problems if the plugs are not properly torqued.
2 Are very tall and wide compared to the 5.0 and 351 5.8L.
3) Can not be bores but about .020 over so there is no saving a overly worn block.
4) Very small bores shroud the valves so Multiple valves are used to make more power such as the Newer 3V heads and 4V heads.
The 5.4L has a very long stroke so it makes decent torque numbers but revs should stay under 6000rpm. The 460 has a 3.85" stroke, the 5.4L has a 4.17" stroke.
The 5.4L is also taller and wider and is a tight fit on an earlier Mustang.
Both the 5.4L and 4.6L have a small bore which shrouds the valves causing flow restrictions. This is why these engines respond very well to forced induction from a supercharger or turbocharger.
For your 95 Mustang, I would recommend a 347 stroker 5.0. It will fit much easier and will not require a total rewiring of the engine compartment.
As for the 4.6L, the internals are the same for the truck and car. Same cams and all. the differences are in the intake and exhaust manifolds and PCM tuning. The cars are tuned for higher rpm HP and the trucks with longer intake runners are tuned for low end torque.
Your trans and other accessories from your 5.0 will not fit a 4.6L or 5.4L. You would also need a 96-98 donor car for the K-member to bolt the engine in and wiring, etc.
So like I said, you are best off staying with a 5.0 302. There are many options. Ford Racing has a nice 340hp 5.0 crate engine for under $5000. I've been thinking of one of them for my 88 5.0 LX.
1) They are very reliable.
2) Make more power per cubic inch than the older pushrod engines.
3) They are plentiful. The 4.6L has been in large cars (Crown Vic, Town Car, etc) since 91.
Bad
1) Most only have 4 threads per spark plug in the head which can cause problems if the plugs are not properly torqued.
2 Are very tall and wide compared to the 5.0 and 351 5.8L.
3) Can not be bores but about .020 over so there is no saving a overly worn block.
4) Very small bores shroud the valves so Multiple valves are used to make more power such as the Newer 3V heads and 4V heads.
The 5.4L has a very long stroke so it makes decent torque numbers but revs should stay under 6000rpm. The 460 has a 3.85" stroke, the 5.4L has a 4.17" stroke.
The 5.4L is also taller and wider and is a tight fit on an earlier Mustang.
Both the 5.4L and 4.6L have a small bore which shrouds the valves causing flow restrictions. This is why these engines respond very well to forced induction from a supercharger or turbocharger.
For your 95 Mustang, I would recommend a 347 stroker 5.0. It will fit much easier and will not require a total rewiring of the engine compartment.
As for the 4.6L, the internals are the same for the truck and car. Same cams and all. the differences are in the intake and exhaust manifolds and PCM tuning. The cars are tuned for higher rpm HP and the trucks with longer intake runners are tuned for low end torque.
Your trans and other accessories from your 5.0 will not fit a 4.6L or 5.4L. You would also need a 96-98 donor car for the K-member to bolt the engine in and wiring, etc.
So like I said, you are best off staying with a 5.0 302. There are many options. Ford Racing has a nice 340hp 5.0 crate engine for under $5000. I've been thinking of one of them for my 88 5.0 LX.