[Sparky]

I suppose this is where to put it :roll: . Why does the 5M run out of power at about 5400 rpm. Is it just a lack of fuel, or something else? The reason is a couple of us were tossing around the idea of trying a SAFC (Megasquirt since we're broke) on one to get it to make power up to 6K or maybe even 6500. Any thoughts?

 

[SupraFiend]

plumbing. Go with a good header, 2.5 inch exhaust, filter and intake pipe and it'll pull to red line.

 

[Dragonfyre]

stiffer valve springs to prevent float.

 

[rumptis]

that is just how these engines are, that is normal for a stock motor. so there is nothing wrong with it.

 

[DKJones96]

a stock 5m looses most of it's power around the 5400-5600 point(automatic in power mode shifts at 5600 in first anyways second is 5300.) but like was said before with a good exhaust and intake system it'll pull hard til you hit the revv limiter. the stock intake system tho i speculate on how much extra power it really gives you.(psycological hp gain) because i hooked up my vacuume gauge to my intake plenum and with a semi dirty air filter it read zero vacuume til shift at 5600 and still had no vacuume.

 

[SilverMk2]

I've yet to see 5 or 6M, even with all the mods, not see a drop in power on the dyno by 6500 RPM. Most of them peak from 5500-5800 RPM. I think my car peaked at close to 6k with the cams in it, and a few hundred RPMs lower seat of the pants without. Usually the reason you see this is because of what the head will flow combined with the cam timing.