max 440 engine revs

Anonymous · Post by **Anonymous** » Fri Aug 11, 06 9:07 pm

what would be the max engine rpm for a stock 440hp motor when using the gears/shift manually?(to set up a shift light)
thanks

Alex · Post by **Alex** » Fri Aug 11, 06 9:09 pm

I would not go beyond 5500 myself with a stocker.

Pete · Post by **Pete** » Fri Aug 11, 06 9:27 pm

Cam is alll done by then so nothing to gain by winding it up further - save your bottom end

AllKiller · Post by **AllKiller** » Sat Aug 12, 06 9:48 pm

Set the shift light about 2-300 rpm before so you dont go over the 5500 limit on the shift.
Its best to fit a rev limiter too if manually shifting your auto....coz into neutral at that rpm and BOOM!!

Oh no the slippery slope to performance

Dave-R · Post by **Dave-R** » Sat Aug 12, 06 10:00 pm

Without knowing the condition of the internals I would agree with the above.

It the engine has been well rebuilt I would take it to 6000rpm on a stock cam even though peak power is well before that. This is to keep the engine on the powerband and make the average HP between shifts as high as possible.

Some experimentation would confirm what the exact shift rpm would have to be. But it wouldn't be above 6000rpm for sure.

Alex · Post by **Alex** » Sat Aug 12, 06 10:58 pm

I gained 3/10th's by shifting up earlier, just a note...

Dave-R · Post by **Dave-R** » Sun Aug 13, 06 1:23 pm

Could be other reasons for that though Alex.

But you're probably right.

NaughtyAlan · Post by **NaughtyAlan** » Sun Aug 13, 06 2:07 pm

Need to now what cam you have and when it peaks out.
440s should not be reved over 6000 other wise you could split down the centre webbing,allthough saying that i have taken mine to 7000 at times and ok.
you need a rev limiter easy if you have MSD just a chip fitted.
Allso what state is your 727 in do you have a shift kit fitted .

Dave-R · Post by **Dave-R** » Sun Aug 13, 06 3:33 pm

Any well built (but not stock) 440 will safely rev to 6500-7000.

That is rubbish about the block.

Pointless having any decent sized cam if you don't rev to 6500-7000. Otherwise you are shifting well below where you should.

I shift at 6500 all the time but I don't go above that because I use the heavy six pack rods and KB pistons.
If i had lighter rods and pistons I would rev higher if the cam called for it.

The main limiting factor is the rod bolt strength. Rods do not break. Bolts do.

As long as the crank and mains are straight there should be no other problems.

Unless you are the kind of person that does burnouts all the time. That is a good way to damage your engine.

Dave-R · Post by **Dave-R** » Sun Aug 13, 06 3:36 pm

I just checked on desktop dyno and Alex is right (of course!).

With a completely stock engine shift at 5300rpm.

Dave-R · Post by **Dave-R** » Sun Aug 13, 06 3:43 pm

Just been playing around on the dyno thing.

Bigger than stock exhaust pipes and dropping the mufflers rev to 5500rpm.

Anonymous · Post by **Anonymous** » Sun Aug 13, 06 7:36 pm

yes i am slipping down the slippery slope!(now saving up for cam,carb, intake, dizzy, high flow pump

),
the engine is stock but it does have a large free flowing exhaust (headers, 3" pipes and straight thro mufflers) 750 vs holley and k&n filter. the tranny has just had duncans magic worked on it and seems great and strong, as well as the engine whitch seems very healthy and strong (touch wood!) well she did run a 14.3@97mph (3.54 gears), no oil burn, 20 inches of vacuum, and runs smooth and quiet
so i will set it to 5500rpm and sort out a rev limiter especialy as she shifts on the column

why is doing burnouts bad for the engine?

Dave-R · Post by **Dave-R** » Sun Aug 13, 06 8:35 pm

Engines gon't like reving with no load. Doing a burnout it is like sitting on your driveway in park and revving the engine to 6000rpm.

Anonymous · Post by **Anonymous** » Sun Aug 13, 06 8:35 pm

Dave wrote:Any well built (but not stock) 440 will safely rev to 6500-7000.

That is rubbish about the block.
Unless you are the kind of person that does burnouts all the time. That is
a good way to damage your engine.

Now,now boys. Make up make up,never gonna break up.

AllKiller · Post by **AllKiller** » Sun Aug 13, 06 9:06 pm

Dave wrote:Engines gon't like reving with no load. Doing a burnout it is like sitting on your driveway in park and revving the engine to 6000rpm.

Hence changing up through the box to take the stress off the engine by lowering the revs and keeping the tyres spinning with only minimal throttle applied, well thats what i do