4A-F Shift Points

[War Monkey]

Anyone know the optimal shift point for a 4A-F engine

[Flashmn]

It depends on the road conditions and how you're driving.

[Liter]

1st 6200
2nd 6200
3rd 6200

[freakinbox]

lol liter, umm yea when ever you feel like it, like today I felt like going to 7000 lol, a little high but hey engine didn't explod . for regular driving you can do anywhere from 3000 to 4000 for a nice ride. Just remember you will lose about 1000 rpm per shift in the lower rpm, and when you are really close to the redline that jumps to about 2000 rpm

[Flashmn]

7000+ might cause damage, because the 4A-F valves start to float at about that rpm range. I've took it to 9000rpm just to see how it felt like....

[Liter]

I was jokin maybe cuase the redline is at 6200

[TokyoRacer]

Yours is 6200? mine shows it to be 6400..

[Flashmn]

I wasnt joking... 9000rpm d00d, tho at 7000revs the valves start to float.

[REN69]

7800rpm here.. although I only take mine to about 7600.. but I like to hear the motor scream.

[burnt03]

So what RPM should you shift at to optimize fuel economy?

[Liter]

See where the tact goes red....thats the redline which is 6200.

[freakinbox]

What do you mean the valves begin to float?
and man I feel like this 4af is invincible lol, althought I have seen pics with holes in the block with shit sticking out, such as the connecting rod (think thats what they are called lol)

[Flashmn]

It means the valves cant keep up with the cam profile, they jump around because the valvesprings arent strong enough.

[freakinbox]

replace the valve springs and that will get better? I have been starting to wonder if I should do a uniqe thing and do up my 4af rather than just get a 4age... but I wonder what the limits are of that f head...

[TokyoRacer]

^Same with me I have a 4afe, little money, no reala ccess to a hoist to do a motor swap..erg.