How high can I rev the 4.6?

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12/23/11, 04:14 PM

#21

ford4v429

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hmm...

Last edited by ford4v429; 12/23/11 at 10:17 PM.

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12/23/11, 04:15 PM

#22

slidejob

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Quote:

Originally Posted by fdjizm

My real life testing at the track proves otherwise, at least on my car.
Like I said above.

Glad it works for you, I would advise the OP to be cautious.

Off to the hot tub to have a nice stogie & cocktail!!

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12/23/11, 04:18 PM

#23

AlsCobra

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Quote:

Originally Posted by slidejob

Glad it works for you, I would advise the OP to be cautious.

Off to the hot tub to have a nice stogie & cocktail!!

You bastard! Jealous.

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12/24/11, 06:28 AM

#24

bob

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Quote:

Originally Posted by redpony05

ive been exploring everything i can do with my new sct tuner, and i have one question: how high can i rev the 4.6 reliably? now that i can adjust the shift points and rev limiter in general, im interested in raising it a few hundred rpms, since it currently tops out at 6k rpms. the internals are all stock and i really dont want to blow anything up, so does anyone else have any experience with this?

Pretty high actually, but as others have mentioned, its a pointless endeavor unless the engine is tuned to take advantage of the added RPM, but its nice to know that you have alot of protection on an over rev (sounds really nice though as you shift from 4th to 2nd at over 100

) IIRC, Ford likes a nice stable valvetrain at least 400 rpm past the rev limiter.

Last edited by bob; 12/24/11 at 06:31 AM.

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3/27/19, 04:05 PM

#25

Blue Roads

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Quote:

Originally Posted by fdjizm

Look and see if you can see why it makes sense to shift up high...
short shift and you are landing below the torque range, lugging (or not getting the best) out of the engine on the next gear.
I went from 12.90x's to 12.72x's shifting at 6500 instead of 6100.

I know I'm brushing off some thick dust on a very old thread... Wanted to say thanks for that info, I've experimented with shift points but never put dyno or ET numbers to it. Nice to see some good info provided. What you say about revving high enough to shift back into the "meat" of your powerband makes a lot of sense.