VXR 6.0 Rev Limits

[mogv8]

Frankly I am never keen on getting friendly with the rev limiter, and stay well below red line. However does anyone know the definitive figures for max constant revs and max intermittent revs for the 6.0VXR engine. I somehow just think I should know, however academic it may be.

Intermittent / constant are the two figures normally published but I can't find them anywhere (have searched the forum but can't find anything either).

Figures (unconfirmed) I have picked up, are 6200 for the warning buzzer and 6700 for the limiter. I don't know if either are correct, and they aren't necessarily the recommended max figures anyway.

Tacho shows hashed red from 6000 and thick banded red from about 6700, which may be the 'constant' and 'intermittent' figures but I don't like to assume.....

Okay I know, I should get out more, but any ideas ?

[anonymous-user]

don't know but I normally change up at around 5500rpm when going for it. There have been a few tales of damaged bearings/bent valves etc on over revved engines so I think it's best to avoid it.

Edited by anonymous-user on Tuesday 4th September 18:32

[ringram]

According to the HSV 6L LS2 tune file its..

LABELS Rev Limiter By Gear (RPM)
Gear {link: GM.GEAR} Value
1st Gear 6600.000000
2nd Gear 6600.000000
3rd Gear 6600.000000
4th Gear 6600.000000
5th Gear 6600.000000
6th Gear 6600.000000

[ringram]

My 5.7 pulls to over 6500. I will set max rpm at 6700 and "try" and shift at 6500 max. (Its 6500 at present but in search of 12 second quarters Ill up it a tad)

Some guys rev to 7000 on the stock engine, but I think thats scary. They say the rod bolts are the weak point.

[AM04ARO]

I change at 5500 as the SC hits max at this level.

I have gone higher and accelerated slower (timed) so this is for me proven.

No point in over revving on a sc car IMO.

[o.versteer]

ringram said:

According to the HSV 6L LS2 tune file its..

LABELS Rev Limiter By Gear (RPM)
Gear {link: GM.GEAR} Value
1st Gear 6600.000000
2nd Gear 6600.000000
3rd Gear 6600.000000
4th Gear 6600.000000
5th Gear 6600.000000
6th Gear 6600.000000

Following this with some interest. Care to tell us (well, me ) what the limit on a 5.7 is, stock? Mine's Wortec remapped so I suppose it might be different, but stock value would do, if you could!

[ringram]

No problem;

LABELS Fuel Cut-off Limiters in Gear (RPM)
In-Gear Cutoff Fuel In-Gear ReEnable Fuel
First Gear 6200.000000 6199.023438
Second Gear 6200.000000 6199.023438
Third Gear 6200.000000 6199.023438
Fourth Gear 6200.000000 6199.023438
Fifth Gear 6200.000000 6199.023438
Sixth Gear 6200.000000 6199.023438
Seventh Gear 6200.000000 6199.023438
Eighth Gear 6200.000000 6199.023438
Not In Gear 6200.000000 6199.023438
Reverse Gear 6200.000000 6199.023438

Dont ask me where 7th and 8th gears are

If anyone is interested in what else is in the tune, idle speeds etc you can download the tunes from www.holdencrazy.com and open them with efilive which you can download from www.efilive.com
You can also see what AFR is supposed to be under full throttle etc

[o.versteer]

Cheers for that, that's heandy to know. So 6000 should be safe?

Mind you, don't know if you lot have this problem, but when I really floor it through the gears, by the top of third I'm way too busy looking where I'm going to notice!

[crisisjez]

Use the force Luke.

[ringram]

Yeah 6000 should be pretty safe.
I spoke on this sort of topic with Daniel at Chipmaster about holding high RPM loads on the dyno, plus from watching GM stress testing engines where they hold full load at max rpm for days at a time Id say you can hold max rpm for a far amount of time without too much worry. Im sure wear and tear are increased, but if fueling, timing, oil and temp are all good things should be fine.