Alloytec rev limit

[bcw61]

Hi Guys,

Probably a silly question, but what is the rev limit for a VZ Alloytec 175?. The tacho doesn't have any 'redline' or other indication, and can't find any mention of it in either the owners handbook or the factory service manual. Had a search through these threads, but can't seem to find an answer either.

Cheers

[andyman]

6500 rpm, for 175 auto,

6500 rpm for 175 manual,

6700rpm for 190 auto and manual

[f1tzy]

Are you sure its 6500 for the 175 manual? Cause im sure mine hit the limiter at 6100

[andyman]

Are you sure its 6500 for the 175 manual? Cause im sure mine hit the limiter at 6100

are could be too, it was when i got mine recalibrated it only did 6100,

ive got mine set on 6700 now though hehe

[bigdaddycool]

I have mine set to 6200 as above that the engine in my opinion doesn't sound good for the execs, and I've heard the gearbox can get damaged under high revs for our 4 speeds.

I dont see much point in going higher then 6200 as I dont beleive there's much speed gain to be had.

[f1tzy]

are could be too, it was when i got mine recalibrated it only did 6100,

ive got mine set on 6700 now though hehe

lol yea i thought it was 6100. I hit the limiter a couple of times when i wasn't paying attention but luckily its a 'softer' limiter unlike my xr8 ute which is like a brick to the face when you hit it

[LxAdventra]

the 4 speeds should hold up, yes they an older box but holden have worked them over the years so should be ok, and gains from the alloytec are best gained from upping the rev limiter, i wouldnt go any higher than 7500 or 8000. The engine is capable of going to 9000 and holding up really well. Looking to get mine raised to around 7500 just to get that extra kick in the top end.

[henrytad]

how do you change the rev limit?

[f1tzy]

^^^ Via a custom tune

[andyman]

I have mine set to 6200 as above that the engine in my opinion doesn't sound good for the execs, and I've heard the gearbox can get damaged under high revs for our 4 speeds.

I dont see much point in going higher then 6200 as I dont beleive there's much speed gain to be had.

max inputshaft speed for a 4l60e is 6500rpm, and thats still with gm's conservative limits, so itll be safe,

i find my wagon with the diff gears and short first gear i need the revs otherwise first gear is just so lame, alloytecs sound good the harder you rev them and they like it too........... but autos dont, but autos are also just lame

[kuzman89]

Probably need a cam change to spin it out to 9000rpm safely, dont know if the 4speed could handle that however.

[Corbs1234]

im sure some people know this saying..."OVER 9000?!?!?!"
but anyway.
revving the engine to anything over 6500 would surely be quite damaging to the engine? and revving to 9000...can the fuel mixture be fully burned in the combustion stroke, there'd have to be a point where efficiency drops...and it'd have to be great quality fuel.
i'll keep mine away from the redline, play it safe...

that being said, some BMW's top out at 8250rpm and the new ferraris top out at just on 9000rpm, and these are +4L V8's

[kuzman89]

im sure some people know this saying..."OVER 9000?!?!?!"
but anyway.
revving the engine to anything over 6500 would surely be quite damaging to the engine? and revving to 9000...can the fuel mixture be fully burned in the combustion stroke, there'd have to be a point where efficiency drops...and it'd have to be great quality fuel.
i'll keep mine away from the redline, play it safe...

that being said, some BMW's top out at 8250rpm and the new ferraris top out at just on 9000rpm, and these are +4L V8's

I doubt revvin it over 6500 is damaging at all, the performance manifolds VZ runs his out to 9000rpm with a cam change. Pushing 214rwkw NA last time I heard. So definetly a benefit, as the alloytecs love to rev, and create more power in doing so.

[bigdaddycool]

I wish I had more info but i've read that pushing the 4 speeds to the limit causes some sort of ring/seal to go........ due to the shift pressure at that rpm.

but eh, i'll agree u do need to jump the rpm when u change ur diff. my 1st gear would rev to bout 70-72 on my 3.08 diff, the 3.45 lsd runs to 66 ...... same prob with second on the highway.

[andyman]

I wish I had more info but i've read that pushing the 4 speeds to the limit causes some sort of ring/seal to go........ due to the shift pressure at that rpm.

but eh, i'll agree u do need to jump the rpm when u change ur diff. my 1st gear would rev to bout 70-72 on my 3.08 diff, the 3.45 lsd runs to 66 ...... same prob with second on the highway.

thats nothing, i only get 50km/h out of first, 70 would be awesome

[Corbs1234]

thats nothing, i only get 50km/h out of first, 70 would be awesome

mmm thats the worst thing about the aisin gearboxes mated to the alloytecs, the need to change to 3rd to make 100kph

[f1tzy]

mmm thats the worst thing about the aisin gearboxes mated to the alloytecs, the need to change to 3rd to make 100kph

That always used to piss me off having to grab 3rd at like 95kph

[bigdaddycool]

3rd to hit 100? ....... u's must have manuals or sv6's...... my first now hits around 72 @ 6400 1st, 2nd i haven't tested yet........ but running to 6400 it should hit about 130 ......

what really annoys me is the lag under a plant on the highway, it takes a second for the power to kick in. i have mine tuned up to make the most power at 30-35% throttle (IAT SAC - Multi adjustment)...... (most spark, less stress, tighter cams) ....... get more power out of 30-35% then full throttle in ways.

-=---

After a few days testing I've decided it's fine to drop the torque reduction for 3rd and 4th 0.1 (from 1.2 to 1.1) between 68'c to 128'c. Doesn't seem to cause any drama's.

-=---

Now Andy you might be able to answer this, our gearbox's are really designed to only run to 6100 due to all the surrounding tune settings for the car. My car when it his 6400 seems to pause as I hit the limit when it goes to change gear, and I now beleive it's due to the cam settings.

*yes cams again*

Here me out....... The execs cam table runs to 6200rpm (where I used to have my rpm limit)........ which never had a problem.......... since I've run it to 6400......... it jumps to the 6200+rpm cam table which is 0 across the board.

Could this be causing my pause? ....... if so, should I adjust the axes so the final cam setting is 6500rpm...... so that it'll run -4 until the 6400rpm mark?..... or maybe just set 6200 to -2.

I think this is a good question for the geargox.

PS. Supporting evidence of similar things, the VE OMEGA runs 6' at 6500 in the cam settings, the VZ SV6 runs -3... at 6500. So I think this is a contributing factor with the exec....

[andyman]

3rd to hit 100? ....... u's must have manuals or sv6's...... my first now hits around 72 @ 6400 1st, 2nd i haven't tested yet........ but running to 6400 it should hit about 130 ......

what really annoys me is the lag under a plant on the highway, it takes a second for the power to kick in. i have mine tuned up to make the most power at 30-35% throttle (IAT SAC - Multi adjustment)...... (most spark, less stress, tighter cams) ....... get more power out of 30-35% then full throttle in ways.

-=---

After a few days testing I've decided it's fine to drop the torque reduction for 3rd and 4th 0.1 (from 1.2 to 1.1) between 68'c to 128'c. Doesn't seem to cause any drama's.

-=---

Now Andy you might be able to answer this, our gearbox's are really designed to only run to 6100 due to all the surrounding tune settings for the car. My car when it his 6400 seems to pause as I hit the limit when it goes to change gear, and I now beleive it's due to the cam settings.

*yes cams again*

Here me out....... The execs cam table runs to 6200rpm (where I used to have my rpm limit)........ which never had a problem.......... since I've run it to 6400......... it jumps to the 6200+rpm cam table which is 0 across the board.

Could this be causing my pause? ....... if so, should I adjust the axes so the final cam setting is 6500rpm...... so that it'll run -4 until the 6400rpm mark?..... or maybe just set 6200 to -2.

I think this is a good question for the geargox.

if its pausing gear changes at peak revs is because torque management is reduced to far and the gearbox is struggling to change gears, you notice this most if you disable torque management on the gearbox, when it gets to shifting it pauses for about a 1 than gets into the nect gear with a burst of speed

[bigdaddycool]

cheers andy..... i have mine set to 98% reduction between the 6144 and 6656. so i shall set this to 99...... if I still get it i'll set it back to 100%.

[bigdaddycool]

Fixed my torque reduction my delay is gone when switching at 6400rpm.......... I gotta say raising the rev limiter is damn good. Seriously crazy fast.

Flooring it if u get an orange light if ur under 58km/s on my car.......... when it drops into first u get serious instant kick.

[WogBoyz]

Fixed my torque reduction my delay is gone when switching at 6400rpm.......... I gotta say raising the rev limiter is damn good. Seriously crazy fast.

Flooring it if u get an orange light if ur under 58km/s on my car.......... when it drops into first u get serious instant kick.

seriously crazy fast? lol dude its an sv6 not a race car

[allanssv6]

my sv6 stock goes the whole 7000 =]

[06vzcalais]

mine shifts at 6500 in auto mode dunno what it goes to in a/s mode

[f1tzy]

my sv6 stock goes the whole 7000 =]

They are limited at 6700