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EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
I'm after picking your collective brains smile

What I have: 2005 VXR Monaro which is running as you know a forged engine with a twin turbo setup. It's making reasonable power 600ish at the flywheel (guestimate based on an engine dyno of 630bhp). There is a re-worked gearbox in the pipeline which will be CV8 'box with a modified 5/6th to give me a usable 6th gear. This was evidenced by the fact I'd run out of revs in 5th by the 3/4 mile marker at T/R. Currently the redline is set at 6300 which isn't helping but with longevity in mind it's set sensibly (much to my distaste but Roger knows what he's doing). The next power step would be to change the manifolds and fit a boost controller which is a bit of an unknown and only a best guess as to the cause of no extra power regardless of upping the boost.

The Goal: initially to crack 200 and ultimately do it in a mile spin

So having gone a GPS verified 183mph in 6th with what felt like a lot more to give, my mind in turning to aero mods to give her an easier time getting to the magic 200.

The questions I have are:

1) can the VXR8 under body aero kit be made to fit a Manaro?
2) I know 007 has had custom under body stuff done but doing it in carbon for my needs is OTT. Anyone know if these were blue printed from another kit?
3) would a front splitter be beneficial and would this undermine any underbody aero work?
4) Anything I've missed?

Probably should add I'll be changing the wheels to OZ ultraleggeras soon smile

I'm opened minded on budget but given my other planned mods I wouldn't want to spend more than 5k without very quantifiable gains otherwise I may as well just throw more horse power at it...!


ARAF

11,554 posts

92 months

[news] 
Wednesday 25th July 2012 quote quote all
Take your door mirrors and rear spoiler off, and tape up the holes.

gsd2000

9,780 posts

52 months

[news] 
Wednesday 25th July 2012 quote quote all
get rid of the body kit and fit the bumpers and everything of an 04 cv8

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
ARAF said:
Take your door mirrors and rear spoiler off, and tape up the holes.
Has mileage on track, not very practical for the autobahn. Cheap though! thumbup

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
gsd2000 said:
get rid of the body kit and fit the bumpers and everything of an 04 cv8
I might as well buy a 04 CV8 and just do an engine swap laugh

Unfortunately I like how mine looks but I know improving the aero will be a massive help in getting to my goal.

Keep the ideas coming.... biggrin
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gsd2000

9,780 posts

52 months

[news] 
Wednesday 25th July 2012 quote quote all
smaller wing mirrors

paul450

5,785 posts

44 months

[news] 
Wednesday 25th July 2012 quote quote all

idea do you know where 007vxr stays.

just nick his after he has had it fitted yes

his alarm in his garage goes off all the time, so he probably wont pay much attention to it

wink

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
gsd2000 said:
smaller wing mirrors
Now that's possible biggrin

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
paul450 said:
idea do you know where 007vxr stays.

just nick his after he has had it fitted yes

his alarm in his garage goes off all the time, so he probably wont pay much attention to it

wink
If only CF floated my boat, suppose I could spray it Matt black tongue out

Gary H 2008

2,259 posts

58 months

[news] 
Wednesday 25th July 2012 quote quote all
Have a look at the underside and get something made. I don't think there'll be any similarities with the floor plan and the 5 piece kit I've got.
From the limited reading I've done a Splitter will be beneficial with a flat under tray and of course losing the spoiler or flattening it off.

Mirrors can have a massive effect on drag over 150 too. Maybe make them removable? (same with the wipers)

Having said all that the Aero mods will be the icing - you need to get the cake mixture right first - and that's
1) Power and 2) Gearing.

Have fun

paul450

5,785 posts

44 months

[news] 
Wednesday 25th July 2012 quote quote all
Gary H 2008 said:
Have fun smile
confused have you not seen her drive, she is nuts

laugh

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
paul450 said:
Gary H 2008 said:
Have fun smile
confused have you not seen her drive, she is nuts

laugh
Yes he has, Gary isn't the full quota either wink

stevieturbo

8,359 posts

116 months

[news] 
Wednesday 25th July 2012 quote quote all
Aero can be tricky. Modern cars will have a lot of wind tunnel testing done to ensure they are safe at speed. IMO DIY messing with that can sometimes produce bad results.

Stick with simple lowering, ensure the front is slightly lower than the rear, and other than that dont go crazy unless you are very sure what you are doing wont have an adverse effect.
A Monaro is already an aerodynamic platform that should have no difficulty achieving 200+ with some power, and IMO should be stable even at those speeds.

It may seem obvious that a flat underside will help, maybe a small rear spoiler, or front splitter. But their real effects at speed are a little unknown unless someone has already tested them and they are proven to help, and most importantly still be safe.

Taping up panel gaps, removing mirrors etc I guess can help. I wouldnt be bothered with all that st though.
Just make it achieve the speed as it is driven on the road.. Covering them in sticky tape just makes them look ridiculous.

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
Gary H 2008 said:
Have a look at the underside and get something made. I don't think there'll be any similarities with the floor plan and the 5 piece kit I've got.
From the limited reading I've done a Splitter will be beneficial with a flat under tray and of course losing the spoiler or flattening it off.

Mirrors can have a massive effect on drag over 150 too. Maybe make them removable? (same with the wipers)

Having said all that the Aero mods will be the icing - you need to get the cake mixture right first - and that's
1) Power and 2) Gearing.

Have fun smile
Got power and gearing under control smile

EmmaJ

Original Poster:

2,098 posts

15 months

[news] 
Wednesday 25th July 2012 quote quote all
stevieturbo said:
Aero can be tricky. Modern cars will have a lot of wind tunnel testing done to ensure they are safe at speed. IMO DIY messing with that can sometimes produce bad results.

Stick with simple lowering, ensure the front is slightly lower than the rear, and other than that dont go crazy unless you are very sure what you are doing wont have an adverse effect.
A Monaro is already an aerodynamic platform that should have no difficulty achieving 200+ with some power, and IMO should be stable even at those speeds.

It may seem obvious that a flat underside will help, maybe a small rear spoiler, or front splitter. But their real effects at speed are a little unknown unless someone has already tested them and they are proven to help, and most importantly still be safe.

Taping up panel gaps, removing mirrors etc I guess can help. I wouldnt be bothered with all that st though.
Just make it achieve the speed as it is driven on the road.. Covering them in sticky tape just makes them look ridiculous.
Hence the thread really. I know Jez well be looking at Aero as part of his quest for 220.

shout Jez wanna split the cost of hiring a wind tunnel and doing some aero R&D?

Alternatively we could get Paul a jumbo pack of sausages scratchchin

007 VXR

51,366 posts

56 months

[news] 
Wednesday 25th July 2012 quote quote all
EmmaJ said:
Alternatively we could get Paul a jumbo pack of sausages scratchchin
roflrofl Will had some weight to the car, just make sure he sits in the back hehe

paul450

5,785 posts

44 months

[news] 
Wednesday 25th July 2012 quote quote all
EmmaJ said:
Alternatively we could get Paul a jumbo pack of sausages scratchchin
, lick






paperbag

ringram

12,208 posts

117 months

[news] 
Wednesday 25th July 2012 quote quote all
I thought you had a darton block Emma?
Thats a lot of engine for not much power..!?
Is it detuned for a reason?

What displacement?

Thats the same output as my NA engine at present.
You will need way more power to hit 200 in the mile.

gsd2000

9,780 posts

52 months

[news] 
Wednesday 25th July 2012 quote quote all
stick it all into a Mazda RX7

stevieturbo

8,359 posts

116 months

[news] 
Wednesday 25th July 2012 quote quote all
Whatever mods you decide to do, keep them simple.

Getting adventurous will carry bigger risks than leaving things alone.

Maybe some simple alloy splitters like this....seems to work for it !

http://www.youtube.com/watch?v=1-jdEj5eMcM

IMO if you want to go faster in a mile, just make more power. It's fully tried and tested and it works every time.
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