N/A Max Power

[WarmAndSCSI]

If you can make the motor sustain revs of about 8k you might reach the airflow required to make 100 hp per liter, in this case 240 at the crank. A small displacement motor in a car that weighs over 2k lbs is just not worth doing. If you want an n/a car go with a V6, and even then your just trying to keep up with Evo's and STI's. Of course an 8G V6 optioned right weighs less than either of the afformentioned cars, so 300 crank hp with a lighter car is going to go faster. Then you can add some nitrous and really have fun.

Like I said before, 8000 RPM is not safe on any 4G64 IMO. The stock rev limiter is set low for a reason. It's a shame really, but rod ratio is a bitch.

[duh2150]

i know im gonna rev liek a mother, but i probably wont make any power, im gonna put in eagle rods

[WarmAndSCSI]

i know im gonna rev liek a mother, but i probably wont make any power, im gonna put in eagle rods

How long did I spend explaining to you why this is a stupid idea? When will you learn to listen?

Have fun with a hole in your block.

[underated]

If you can make the motor sustain revs of about 8k you might reach the airflow required to make 100 hp per liter, in this case 240 at the crank. A small displacement motor in a car that weighs over 2k lbs is just not worth doing. If you want an n/a car go with a V6, and even then your just trying to keep up with Evo's and STI's. Of course an 8G V6 optioned right weighs less than either of the afformentioned cars, so 300 crank hp with a lighter car is going to go faster. Then you can add some nitrous and really have fun.

Like I said before, 8000 RPM is not safe on any 4G64 IMO. The stock rev limiter is set low for a reason. It's a shame really, but rod ratio is a bitch.

AMS and a few others recommends a rev limit of 8500 for their 2.4l kits this is do to the rod ratio being changed i think they use a 156mm rod vs the 150mm stock...

here is some info on a 2.4l

block: 4g64

bore: 86.5mm (stock)

stroke: 100mm (stroke is dictated by crank)

deck height: 6mm

cross sectional area of piston: ~5877mm^2

overall displacement: ~2.35L

rod length: 150mm (most of the time)

rod/stroke ratio: 1.5:1

piston speed:

100mm stroke at 7200rpm is 24.0 m/s

100mm stroke at 7500rpm is 25.0 m/s

100mm stroke at 7800rpm is 26.0 m/s

you most likely dont want to go over 26m/s without some custom hardware

[qnz]

when you start adding 200 hp to a car that was only meant to handle 100 hp, you start breaking other things like axles, trannys, etc.

[duh2150]

i know im gonna rev liek a mother, but i probably wont make any power, im gonna put in eagle rods

How long did I spend explaining to you why this is a stupid idea? When will you learn to listen?

Have fun with a hole in your block.

lol im fing with you lol i knew you were going to say something

[6G72gearhead]

when you start adding 200 hp to a car that was only meant to handle 100 hp, you start breaking other things like axles, trannys, etc.

Or since the platform has had a 200 hp V6 in it there is a good chance that alot of the components are designed to handle close to that hp figure.

[WarmAndSCSI]

when you start adding 200 hp to a car that was only meant to handle 100 hp, you start breaking other things like axles, trannys, etc.

You're not going to break shit @ 300 WHP unless you do something ignorant or beat on your car. The F4A42 is only slightly weaker than the F4A51 and the axles are the same.

[stolenstapler86]

anyone ever bored out a 64? if so how much over can you go safely?

[underated]

i'm at 87.5mm on my build

[duh2150]

thast becasue you honed your engine

[stolenstapler86]

what kind of pistons?

[underated]

wiseco high compression 11.5:1

[WarmAndSCSI]

thast becasue you honed your engine

Overbore != hone

[duh2150]

same thing lol stop correcting me if your boring it out your honing it also, your not gonig to bore out the cylinder into a egg shape lol, im gonna make square pistons one day lol

[laxinwarrior]

same thing lol stop correcting me if your boring it out your honing it also, your not gonig to bore out the cylinder into a egg shape lol, im gonna make square pistons one day lol

Come on, now you just sound like an asshole....

[duh2150]

lol no im not think about how much more area you get with squares then with circles

[WarmAndSCSI]

lol no im not think about how much more area you get with squares then with circles

LOL, have fun making a square piston "ring."

Put down the pipe, man.

[duh2150]

lol yeah how am i gona figure that math out 0.0 to great for my mind!! :shock:

[6G72gearhead]

To get the greatest efficiency out of a combustion such as what happens to make your engine run, it has been proven time and time again that round is the most efficient.