CV8 + exhaust + airbox + edit + 4.11 diff = happy

[lucas]

Just wanted to let people know that I have had a pleasant and fruitful experience with Sam's Performance over the last couple of weeks. I took my new CV8 M6 in for exhaust/airbox/edit (usual thing) a couple of weeks ago. Came off Sam's Dyno with a much smoother power curve and an increase in peak power from 165rwkw to 223rwkw.

I was happy with the improvement, it made the car feel a little better than my old VT2 R8. Had nice performance up to about 4000rpm, and was strong above 4000rpm. But did not accelerate as hard as the R8 used to. Sam suggested the culprit for this was the diff, and was urging me to install the 3.91 diff when I was there the first time. I wanted to try it without first and see.

The new exhaust was reasonably subtle, which is exactly what I asked for, but made a bit of a resonating/dronging noise under about 1800rpm. The car was sitting on about 1600rpm in 6th at 110km/h, so I figured the shorter diff would help there too. The noise was not a lot, and I am sure plenty of people here would think I was crazy for it bothering me.

Did some research on rpm vs. road speed with the different diffs, and it showed the 3.91 would have been still close to 1800rpm at 110km/h. Looking at the 4.11 diff, the rpm bumped up closer to 1900rpm, right where I wanted it.

So I got the car back on Tuesday with the 4.11 diff done and .... I got wood :) The car is just awesome now. I still cannot believe the difference the diff has made to the feel of the car under acceleration. I would never have believed it until I experienced it. Oh, and the higher RPM at 110km/h has sorted the noise issue.

I read a few "cautionary" posts in the tech section here about the 4.11 diff, but let me tell you that it's still a fantastic daily driver. I have never been to a strip, and may never go, so I didn't do it for that. You can count me in the "yay" column for the 4.11 option with the M6 gearbox.

Thank you Sam for the time you spent explaining the options to me, and thank you to you and your mechanics for a job well done.

[mid life]

Good to hear Lucas, I've been down a similar path with my VU ute, only I chose the 3.91 diff gears. Must say I was very temped to try the 4.11's but at the time the majority were using 3.91's so I went with the flow, but as you have said the difference is not as dramatic as i expected, often wish I had the balls to go with 4.11's at the time.

Anyway its much better than the stock 3.46's and if i keep going on the mods the additional power and torque will overcome the difference I'm sure.

:cheers:

[lucas]

I don't think you could feel a lot of difference between the 3.91 and the 4.11 under "normal" driving conditions ... the main thing is to get off the stinky stock ratio that Holden uses :)

I should have put this in my original post - you can see a scan of my dyno sheet at http://users.on.net/lnelson/monaro/dyno_chart.jpg

[SPJ]

Very nice smooth curve...
Awsome! :thumbsup:

Is it a Maf or Mafless tune?

[Justice R8]

Originally posted by DuNsTiN
Very nice smooth curve...
Awsome! :thumbsup:

Is it a Maf or Mafless tune?

And you mexicans call me a shit stirrer!!:flip3:

[lucas]

Originally posted by DuNsTiN
Very nice smooth curve...
Awsome! :thumbsup:

Is it a Maf or Mafless tune?

Mafless ... here's a copy of what I just sent to drewbytes:

CV8 V2 Series III
Dual 2 1/2" Redback Stainless exhaust
4-2-1 extractors (HM I think)
Replacement cats
"Airbox Hole Bigger" mod
Kingdragon filter
GTS MAF pipe
MAFless edit

(and stock 3.46 diff when that chart was made)

[Fabio's CV8]

Are the 4.11s locked?

[Obscur3d]

Great Result :thumbsup: I have exactly the same setup as you on my monaro minus the diff gears..

Now Im reeeeaaaaaaally tempted to get some new diff gears (as if I was wasnt already before!)

[lucas]

Originally posted by FDVTGEN3SS
Are the 4.11s locked?

God no, it's a daily driver ;) I like my LSD's.

[ssberlina]

Very sad to see that the stock series 3 "245kw" engine only put out 165kw!!!!!!

What is holden doing to the tunes on the 245?

[Fabio's CV8]

Originally posted by lucas
God no, it's a daily driver ;) I like my LSD's.

Thats Mad!

Was it exp $?
Did you just change the gears or whole centre?

[Dutch]

That sounds like a great result. However could you explain more about this "airbox mod"?
I'm looking at ways to improve my one, as I think there should be good gains available without resorting to a pod setup.

[vt2vx]

that why sams is good, you can go to one spot and get a whole package done that matches pretty well what you ask for.

[lucas]

ssberlina: I just assumed that Sam's dyno was on the conservative side :)

FDVTGEN3SS: the whole diff was changed. It was a brand new diff, not something off another car - and hence was more expensive than the 3.91 option

Dutch: the airbox mod was something to do with opening up the size of the air intake hole. Sorry, that's all I know since....

vt2vx: exactly :)

[V82xist]

Sounds awsome. Hill starts must be a lot easier now with the diff set up :burnout:
Very :cool:

[nthnbeachesguy]

Any chance of u telling us the price of the 4:11's and if its possible or not too just change the internals??????????? PM if necessary!!!!!!!!!

[lucas]

Originally posted by V82xist
Sounds awsome. Hill starts must be a lot easier now with the diff set up :burnout:
Very :cool:

hehe funny you should mention that, it's one of the things I noticed improving. The CV8 was, relative to the old R8, a bugger to get moving off the line. More clutch slippage needed that I really like. Now, it's all sweet :)

[lucas]

Originally posted by nthnbeachesguy
Any chance of u telling us the price of the 4:11's and if its possible or not too just change the internals??????????? PM if necessary!!!!!!!!!

You have a PM.

[jneil]

Originally posted by ssberlina
Very sad to see that the stock series 3 "245kw" engine only put out 165kw!!!!!!

What is holden doing to the tunes on the 245?

My VX II SS was 225kw and pulled 164rwkw on the CSV dyno 2 years ago (stock as a rock & 4000km), Peter said mine was on the high side of most he had done.

[Roger]

Originally posted by ssberlina
Very sad to see that the stock series 3 "245kw" engine only put out 165kw!!!!!!

What is holden doing to the tunes on the 245?

Yes, seems the VYI tune surprised them. A stock VYI M6 pulled 208rwkw on Sam's, mine (basically stock) was 202 - both on the same day.

Everytime someone gets a stock VYII near a dyno, it's no where near those sorts of numbers.

Maybe they decided to pull a bit out of it because they were embarrassing HSV's in road tests.........

:nyuk:

[Venomous]

Impressive, whens the cam going in? :D

[Spoocs]

No holden limited power to stop excessive pinging in many vehicles that were coming off the shelf

[MNR-0]

Congrats on the tune. Mine pulled 175rwkw stock before CSV worked their magic. Now it pulls 218rwkw.

I know what you mean about the advertised power output. I dont think Holden have any quality control with these cars power wise and only advertise power ratings as a sales gimmick to attract customers.

I had a custom 4-1 short header, custom 2.25" catback and enlarged the VYII cats from their stock metric size of around 2" to 2.25".

I also swapped the :spew: 3.07 gears for :cool: 3.46. Made a noticable difference and is now a great torque puller. I think the 3.46 gears are great and with a TC the difference will be negligible between 3.46 and 3.73 or even 3.91s for that matter.

[lucas]

Impressive, whens the cam going in? :D

Sometime in the next month :)

Handy hint ... if you are happy with what you have, don't accept the offer to ride in anything with a bucketload more power than you have ... it'll be an expensive ride ;)

[Animal]

Handy hint ... if you are happy with what you have, don't accept the offer to ride in anything with a bucketload more power than you have ... it'll be an expensive ride ;)

Wise words there.

Went for a ride in a edited Monaro - got mine done.

Hard to stop when you begin, I want a cam now too :)

[Plan B]

I want a cam now too :)

Ken, you don't want a cam.... YOU NEED ONE! ;) :D

[lucas]

Ken, you don't want a cam.... YOU NEED ONE! ;) :D

... and a stroke to 383ci :eek:

Resistance Is Futile

[Plan B]

... and a stroke to 383ci :eek:

Resistance Is Futile

I'm keepin away from NOel's beast, just for that very reason. ;)

[Animal]

Ken, you don't want a cam.... YOU NEED ONE! ;) :D

Hi Pete,

I hold you fully responsible for my recent mods !

Visit Sam's, chat to Peter while he assembles his latest block, ended up spending $1,500 more than expected.

Made a good friend though :)

[IIV8II]

So, how useless is 1st gear now? :D

(That's a half-serious question...)

[hsv675]

Just wondering if you could tell me how much it all cost???

[Animal]

Just wondering if you could tell me how much it all cost???

Define what you mean by all.

For me it is an ongoing cost ( as it would be for a lot of guys on this forum ). It depends on your budget and required outcomes. There is a heap of info for the best bang for your buck on here. I would have saved myself a heaps of cash if I had of know about this forum first.

And the cam goes in as soon as I get my tax cheque back Pete !
Thanks heaps for the guidance mate.

[Plan B]

Anytime Ken. Cheers.

[lucas]

now how do I add "+ 37ci" to the thread title :D

... and still happy

Thanks to Sam and all the boys, the car feels very, very strong. Now if it would only stop raining in the National Park in the evening so I could really have some fun!

For those who many be interested, the current chart - http://www.users.on.net/~lnelson/monaro/383_engine_dyno.jpg

[CarlFST60L]

Yes, seems the VYI tune surprised them. A stock VYI M6 pulled 208rwkw on Sam's, mine (basically stock) was 202 - both on the same day.
:nyuk:

That was my SV8 :D I got 211Kwrw when stock on another dyno (Tom was saying somthing about their dyno being upto 10Kw down), the day of the tune it dropped 8Kwrw to run 200Kwrw (as you can see on my dyno) and went onto pull 234Kwrw after mod's + edit with 770nM :D

The dyno sheet is here and list of mod's etc are here:
http://www.ls1.com.au/forum/showthread.php?t=26784

I seen the monaro with exhaust etc on it, very nice, checked out the exhaust, also very nice, i went with the HM cat back setup and was thinking of getting the rear muffler taken out as it is a little to quite...

I have been driving my car heaps after all the mod's, love the work Sam did... Top job... Blown off plenty of cars, gave an XR8 about 20m head start and caught him at around 110 :lol:

[Walt]

Mafless ... here's a copy of what I just sent to drewbytes:

CV8 V2 Series III
Dual 2 1/2" Redback Stainless exhaust
4-2-1 extractors (HM I think)
Replacement cats
"Airbox Hole Bigger" mod
Kingdragon filter
GTS MAF pipe
MAFless edit

(and stock 3.46 diff when that chart was made)

Quick dum question from a newby... (I'm planning some mods for my V2 CV8 & this forum rocks for info)... I'm a bit confused re whether 'stock' is 3.07 or 3.46?

[vt350phantom]

3.46 is stock for manual, 3.08 for auto.

[vussute]

just wondering if u could send me a pm of how much the 4.11 cost and where it got done as i am lookin at doing this 2 my ute thanks

[NickS]

2 year old thread and the thread starter hasn't been online for over 3 months ...

Look at the dates guys.

[SSEEYA]

that 4.11 diff
i heard that you can really get em for a VY u gotta get one from an older model
is that true??
cause i would like 4.11 but not sure if it is possible, was told that the 3.91 is more durable and it also fits straight in with no headaches.

[Justice R8]

that 4.11 diff
i heard that you can really get em for a VY u gotta get one from an older model
is that true??
cause i would like 4.11 but not sure if it is possible, was told that the 3.91 is more durable and it also fits straight in with no headaches.

4.11 is a complete change

3.9 is change of gears + new bearings

[GTO_]

2 year old thread and the thread starter hasn't been online for over 3 months ...

Look at the dates guys.

Is there a law about bringing up old threads? The same mods 2 years ago still apply today. Relax dude!