e-series redline limits?

Simmo · 20-10-2005, 07:12 PM

what dictates the 500rpm difference between ea-ed sixes and ef-el ones? is it cam specs or stroke or something? cos i thought they were extremely similar engines all through the e series.

Simmo · 20-10-2005, 08:04 PM

no one knows this?? can i rev my ed to 5500 safely or what? wheres kerry or effalcon :P.

sam12h · 20-10-2005, 08:14 PM

minor revisions as the motor was developed. biggest differences from ed to the introduction of the ef were the dual runner length inlet manifold & the use of extra counterweights on the crankshaft. revs a little smoother & breaths a little better to put it simply.

Simmo · 20-10-2005, 08:17 PM

mostly the counter weights on the crank im guessing so it didnt shake itself apart over 5000rpm. thanks.

SileNceR · 20-10-2005, 08:36 PM

ecu...

Simmo · 20-10-2005, 08:37 PM

well i can definitely get to 5500, just dont want to if its really gonna hurt the thing.

sam12h · 20-10-2005, 08:44 PM

more revs = more wear on any motor
why do you need to rev it to 5500 anyway?
u trying to hold third down the 1/4 or something?

Simmo · 20-10-2005, 08:47 PM

just wondering really. also when i get around to putting a nice big cam it that makes power till 5500 i'm gonna want to use all the revs.

gozza · 21-10-2005, 09:30 AM

after putting the shift kit in my auto
it shifts hard as soon as it hit 5(im pretty sue lol) 5 is when its starts goin red hey?

SileNceR · 21-10-2005, 11:43 PM

Quote:

Originally Posted by sam12h

more revs = more wear on any motor
why do you need to rev it to 5500 anyway?
u trying to hold third down the 1/4 or something?

hah I tried that first run I did at heathcote.... about 20-30m away from the end car's like rrrrrrrrev limiter... haha

EDXR8 · 21-10-2005, 11:50 PM

Quote:

Originally Posted by Simmo

just wondering really. also when i get around to putting a nice big cam it that makes power till 5500 i'm gonna want to use all the revs.

If you want to rev above 5000rpm regularly do yourself a favour and rebuild and balance the bottom end, that way you will be able to get 6k out of it (not that you ever really need to rev that high anyway) and not have to worry about detonating an engine.

NC_Steve · 22-10-2005, 12:37 AM

I always thought it was the smaller lifters in the EF-EL that increased the red line? Less inertia and what not.

UNR8D · 22-10-2005, 01:35 PM

my nl with HP4 chip shifted the limiter from 5500 to 5800rpm but i start loosing power after 5400rpm so its not alot of use to me, i have got double cone valve springs and head ported/polished, Billit cam, with the HP4 chip i can shift the limiter anywhere i want but if its not making power after 5400 i dont see the point in making it redline at 6000rpm.

Age182 · 22-10-2005, 04:52 PM

Were does every ones redline start on there Tachos MY EF Fairmont Ghia Starts at 5500

Biggoggs · 22-10-2005, 11:31 PM

Quote:

more revs = more wear on any motor
why do you need to rev it to 5500 anyway?
u trying to hold third down the 1/4 or something?

More revs generally means more power. Power = torque * rpm.

I think my EA redlines about 5k. Under `enthusiastic driving' I usually shift at 4500 though. Might be just me, but it feels like things would fly off if I went any harder. Maybe I'll play around with it when I can afford to break something :P

EDXR8 · 22-10-2005, 11:35 PM

Quote:

Originally Posted by Biggoggs

More revs generally means more power. Power = torque * rpm.

Yes but torque drops off very quickly after 4500-5000rpm, therefore power also drops.

Biggoggs · 22-10-2005, 11:44 PM

Quote:

Yes but torque drops off very quickly after 4500-5000rpm, therefore power also drops.

Yea, that's why I said generally

Still, if there's more power in the `empty top-end' than in the next gear, it might be worth hitting redline. If anyone's measured torque output for their E-Series, it'd be interesting to find out.

347Stroker · 23-10-2005, 07:36 AM

Just rev it till the rod bolts tell you not to rev anymore simmo, then you know what breaks, and can build a bettter one....lol

Rowy,xr6 · 23-10-2005, 10:23 AM

At the end of the day simmo it doesnt matter what you do to the motor it will only rev to about 5250 coz thats when the ecu cuts the spark, my motor still makes power till it hits the limiter... I hate it, wish i could rev to 6000, that would get me to 100 in second without slowing the diff or gearbox :eclipsee_

EDXR8 · 23-10-2005, 02:00 PM

Quote:

Originally Posted by Rowy,xr6

I hate it, wish i could rev to 6000, that would get me to 100 in second without slowing the diff or gearbox :eclipsee_

If you could rev to 6000rpm it would cost you performance and time, sure your 0-100 times might be slightly faster because you could save a shift, but your 1/4 mile times would suffer. Even the guys running big cams and ported heads still don't make any decent torque much above 5000rpm.