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Thread: 5 litre mods, how much juice?

  1. #1
    pow3rslave's Avatar
    pow3rslave is offline DoNothing Member
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    Default 5 litre mods, how much juice?

    ok, so as foamy can vouch for, i've been talking about getting an 8 for a while now, the folks have pretty much agreed to advance me the cashola, and i'll pay them back when i sell my v6

    anyway, one of the things they want me to look into is how much petrol it'll chew, so anyone who's got any of the following mods who could give me any info would be appreciated

    anyway the engines a vn 304 with what the guy thinks is a stage 3 cam (it's lumpy and kicks in at 3k revs yella terra roller rockers, oversized injectors and a torque chip.

    so if anyone's got any of these, give us a shout as to your average petrol usage.

    cheers in advance

  2. #2
    Boonz's Avatar
    Boonz is offline the holden mechanic
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    lol well they arent too bad.... highway driving will average about 13 litres per hundred with the cam

    if your looking at a stage 3 crow cam package ive got a cam and memcal sitting here that i didnt use when i built my motor last.
    want $150 for it and its never been used

  3. #3
    pow3rslave's Avatar
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    forgot to mention, i'm calling tomorrow for an insurance estimate, but chuck one up if you've got a vn 8.

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    KRUPTD is offline VN BT1 5L
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    Like many other people would have mentioned when you buy a V8 you dont really care about the fuel economy,because if you worry about it whats the point of owning a V8.My VN 5L has twin throttle bodies (twin 60mm) highrise single plane manifold,stage 2 crane cam slightly more agressive than the group A vn cam,ajustable crow timing set,big extractors,high flow cat with single 3 inch exhaust turbo muffler and dumped at the diff.Cold air intake setup,modified memcal by greenfoam,3.9 gears in the lsd diff.But soon will be upgrading to yella terra roller rockers and bosch bluetop injectors and a another modified memcal by the best.My fuel economy isnt bad i roughly average 11.5 to 15L per 100km.Around town is a different story.I own V8's because of the power,the sound and the feeling when you stab that right pedal and feel your lips touch your ears.lol
    (KRUPTOR)VN BT1 5L TTB's,MANUAL,LSD

  5. #5
    Boonz's Avatar
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    well im almost 20, been naughty once, have a fair few mods.... insured for $16,000 and pay $2400 a year with SGIC
    they were the only ones that would insure me with all the mods....

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    Quote Originally Posted by peanuts inc
    if your looking at a stage 3 crow cam package ive got a cam and memcal sitting here that i didnt use when i built my motor last.
    want $150 for it and its never been used
    PM me with more details please.

  7. #7
    winton's Avatar
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    lol damn u guys get good economy! i get min 17-20 in townn!!!!!! no cam nothing just
    exhaust / headers/ foamy tune sucks lol but ah well thats a v8 for ya

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    Quote Originally Posted by winton View Post
    il take the cam done
    Lmao, I just saw your plates, GETA5L, hahah awesome.

  10. #10
    winton's Avatar
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    Quote Originally Posted by Mack View Post
    Lmao, I just saw your plates, GETA5L, hahah awesome.
    hahah yer not everyone likes it get a few smart comments but stil i think its funny
    new car: 96 vs SS II BLACK+5 SPEED
    http://forums.justcommodores.com.au/...ad.php?t=57053
    ^^^cheak it out^^^

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    Quote Originally Posted by winton View Post
    hahah yer not everyone likes it get a few smart comments but stil i think its funny
    Nah its definatly cool man, i loved it when i first saw it!

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    Quote Originally Posted by VR304 View Post
    lol damn u guys get good economy! i get min 17-20 in townn!!!!!! no cam nothing just
    exhaust / headers/ foamy tune sucks lol but ah well thats a v8 for ya
    Either you put around town all day or you could improve that :P. Most VR' V8's make 10.0-11 on the highway if not dipping into the high 9's

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    vnv8driver is offline Banned
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    i get anything from 8.5-10.5 on the highway with cruise control on. around town i get 14.0-15.5, thats heavy driving lately, usually about 14.0 driving 'normally'

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    cam/chip/exhaust etc mine sits on about 9.7-11 on hwy with cruise on, around town 13-14. its also manual if that makes any difference? Also insurance through shannons for me is 567.11 a year, full comp rating one covered for 10.5k
    Geoff
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    EvoVIIIJDM is offline Got Evo?
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    Quote Originally Posted by winton View Post
    hahah yer not everyone likes it get a few smart comments but stil i think its funny
    cant wait to meet you at some lights in modbury......
    Quote Originally Posted by Skitz View Post
    Go ahead with the SS badges,you will reap the benefits.

    I have put SS badges and the kit on my VE Omega and when I go cruising and rev it past the girls.........well what can I say,they have drool running down their face.I chuck a U-turn and they say ''Nice car'' and I say ''It's an SS,jump in''.

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    Quote Originally Posted by vnv8driver View Post
    i get anything from 8.5-10.5 on the highway with cruise control on. around town i get 14.0-15.5, thats heavy driving lately, usually about 14.0 driving 'normally'


    do u drive like a grandpa or u squirt it at times??
    mines gay! 20L this week lol 60 ltires gave me like 285kms..
    on freeway its pretty cool like 9-12 cant complain but city is just bahhhhh
    any ideas peopz? get injectors cleaned lol ?

  17. #17
    vnv8driver is offline Banned
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    if i go flat out every where i see 20-22 litres but driving normally (not like a grandpa) its around 14.0-15.5, the reading at the moment is 15.1 and that has been anything but a grandpa

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    hmm i usualy use the cruise button alot even goin like 60kms..
    reckon i should get my injectors cleaned proper?

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    vnv8driver is offline Banned
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    has the rotor cap and button been replaced? thats with leads, plugs, cleaned throtlle body and intake, tune, etc...... what have you done to it since you bought it?

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    Quote Originally Posted by VR304 View Post
    hmm i usualy use the cruise button alot even goin like 60kms..
    reckon i should get my injectors cleaned proper?
    cruise is not good for your fuel economy. Every little rise in the road the car will accellerate to keep your speed but with cruise off you just drop your speed by a few kays and then gradualy get it up to 60 again. I tested this in a BA falcon the other day; cruise at 60 and it was about 7L/100km but it was always giving it a squirt to stay at 60 and it would go up to 14L/100km. but when i was driving with cruise it just hovered around 7L/100km and if i needed to speed up to 60 again i would do it softly and it would got to about 10L/100km.

    just something to think about
    no longer a hoon by association - the commodore is gone

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    You have to drive BA/F falcons with a verrrrrry light foot to get good economy and if you leave a corner in one and the first thing in the road is a big hill you have to really baby them up to speed to get to stop them gulping down the fuel, being such a heavy car with not alot of grunt (not for the weight) it's pretty difficult. Cruise control just belts up the hills and sucks all your juice in cars like that. It's not so bad in something like a VN V6 but 5 litres suck the juice at an superb rate of knotts if you even give them 1/4 throttle

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    Quote Originally Posted by vnv8driver View Post
    has the rotor cap and button been replaced? thats with leads, plugs, cleaned throtlle body and intake, tune, etc...... what have you done to it since you bought it?


    my car only has 148 on it atm lol but since i got it i changed the leads , plugs ( due for change soon) , havent cleaned throttle body dono how.. intake i got SS inductions with bmc pannel filter and hsv airbox lid , foamies tune

    does changing the o2 sensor do jack all? would my fuel economy turn to **** if i drive with the fuel meter sittting around the red?

  23. #23
    vnv8driver is offline Banned
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    the o2 sensor should definitely be replaced with a new one if it has never been changed, and does affect economy. now with the foam tune(which is probably why its chewing fuel), im expecting my economy to decrease, but still be the same (or around) the same driving sensibly.

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