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few questions on the vf ss

ryan101

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Hi guys,
In the near future I'm looking at getting a vf ss wagon, I just have a few questions

Does the vf ss run better on 98 fuel like the ls1s? Or doesn't it matter as much with these newer cars?

Does anyone have a ltr per 100km for e85?

What's the 0-100km for the wagon? Can only find info on the sedan

Will these engines develop issues like the ls1s ( piston slap, lifter noise, leaky sumps)

As you can probably tell I'm a ls1 owner been a great car but had its issues like mentioned

Cheers
 

ryan101

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One more thing, the sedan has a aluminum bonnet and boot, it's it the same for wagon?
 

kosta364

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I do mostly hwy but my L/100 is usually around 15L per 100 with a little punch here and there taking off or overtaking.

I get about 450ks a tank but could easily get 500 or just over.
 

Banjo79

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Sorry no data on E85 but with 98 premium I can do Mt Isa to Tennant Creek (660km) just and I mean just with a speed of 110kph for the Qld part and 130kph for the NT section. That's with a large dog two cute cats and luggage. Just for everyone's info that hasn't been to a track or the open speed limit section in the NT she chews around 20l/100km doing 220kph.
 

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Hi guys,
In the near future I'm looking at getting a vf ss wagon, I just have a few questions

Does the vf ss run better on 98 fuel like the ls1s? Or doesn't it matter as much with these newer cars?

Does anyone have a ltr per 100km for e85?

What's the 0-100km for the wagon? Can only find info on the sedan

Will these engines develop issues like the ls1s ( piston slap, lifter noise, leaky sumps)

As you can probably tell I'm a ls1 owner been a great car but had its issues like mentioned

Cheers
98 Octane fuel gives me 12L/100km, E85 gives me 16.5L/100km.

It is claimed that E85 is 30% less dense than normal fuel, therefor is 30% less efficient - however mine used 37.5% more in same driving conditions.

However, regardless of what people say, I noticed on my second consecutive tank of E85 a significant power increase - my car was activing traction control up to 80k/h, where as with 98 octane it will only activate up to 40km/h.

Most of my driving is freeway, or roads that are 80km/h speed limits with minimal traffic lights. (minimal stop start on the freeway)

As for whether they run better on 98 compared to 91 - don't know, never tried.

Will the engine develop issues - depends how it's treated and what is done to it, every engine has a life span.
 

Flukey

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I just did did back to back tank fills with 91 and 98 octane, 100% metro driving.
91 octane - 460kms
98 octane - 480kms

Around town I cannot tell the difference power wise so will just stick with the 91. The 98 also adds $10 to the bill and isn't worth it.
 

426Cuda

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I just did did back to back tank fills with 91 and 98 octane, 100% metro driving.
91 octane - 460kms
98 octane - 480kms

Around town I cannot tell the difference power wise so will just stick with the 91. The 98 also adds $10 to the bill and isn't worth it.
Flukey,

Was that Caltex fuel? I used to use it, but since switching to BP, I can say the Caltex 98 is rubbish. There is a significant difference in mine using BP 98, but then again mine is tuned now.
 

426Cuda

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98 Octane fuel gives me 12L/100km, E85 gives me 16.5L/100km.

It is claimed that E85 is 30% less dense than normal fuel, therefor is 30% less efficient - however mine used 37.5% more in same driving conditions.

However, regardless of what people say, I noticed on my second consecutive tank of E85 a significant power increase - my car was activing traction control up to 80k/h, where as with 98 octane it will only activate up to 40km/h.

Most of my driving is freeway, or roads that are 80km/h speed limits with minimal traffic lights. (minimal stop start on the freeway)

As for whether they run better on 98 compared to 91 - don't know, never tried.

Will the engine develop issues - depends how it's treated and what is done to it, every engine has a life span.
My car feels sooooo different on Caltex Eflex (E70-85) compared to BP 98. I can't really say if I can feel the extra power, but agree with what you're saying re the traction control. Sometimes mine skips sideways taking off from a standing start in 2nd gear (Auto), and that's only say half throttle at most.

The most surprising differences though are the engine and exhaust note (far quieter), and the auto changes (far smoother shifts and less downshifting). On corners I go around where my car would have dropped from 5th to 2nd with BP98, it now stays in 4th or at worst drops back to 3rd. The only conclusion I can draw is there is more bottom end torque so the downshifts aren't necessary. No pinging or laggy acceleration either. It gets up and boogies, and even under light acceleration just pulls away smooth and strong. Note my car was tuned to run on both 98Ron and E85 by Gentech.

The ironic thing is the push into the back of the seat seems harder with BP98. Pperhaps that's just a perception due to the V8 growl my car makes on that fuel. Unless I virtually floor it with the Eflex the engine note is very very quite - almost back to standard note. However I think it's more to do with the tune. My view is that the Eflex torque curve starts to climb lower in the rev range, climbs rapidly then plateau's, whereas the 98Ron torque curve is lower at lower rev's through to the bottom of the mid range, say 3-3.5K revs, then climbs above the E85 curve. hence the feeling of being pushed hard into the seat, and the harder sharper gear changes at high revs. Just my theory though.

By the gauge I used a little over a quarter of a tank to drive Canberra to Wagga (250k's). It was full to the brim of E85 Eflex.
 

Flukey

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Flukey,

Was that Caltex fuel? I used to use it, but since switching to BP, I can say the Caltex 98 is rubbish. There is a significant difference in mine using BP 98, but then again mine is tuned now.
7/11 so it probably was Caltex.
Interesting you say that because I had used 98 one other time and I got nearly 600 from the tank around town.
I hadn't considered a difference in premium unleaded so I will try Shell or BP and see how it goes.
 

LooLoo18

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7/11 so it probably was Caltex.
Interesting you say that because I had used 98 one other time and I got nearly 600 from the tank around town.
I hadn't considered a difference in premium unleaded so I will try Shell or BP and see how it goes.
7/11 Use Mobil fuel!!!
 

ryan101

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Thanks so far guys, another question worth adding a trans cooler? Just to pro long the life
 

duaned

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Speaking about E85, I'm currently going through my first tank of the stuff and can now feel when the AFM activates / de-activates. On 98RON this was in-distinguishable. Interesting.
 

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I hadn't noticed the AFM activate. Will see if I can detect it tomorrow.
 
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BP Ultimate (98) is absolutely worth the extra couple of dollars to use.
 

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Does the vf ss run better on 98 fuel like the ls1s? Or doesn't it matter as much with these newer cars?
Yes, not much difference with the stock tune though.

Does anyone have a ltr per 100km for e85?
Same engine in a VE SII best ever was 9.5l/100k highway Sydney to Albury, typically 12.5l/100k highway. Around town being sensible it can use nearly as low as the same amount of petrol, but depending on load, start/stops can easily be twice that, around 22l/100k.
Properly tuned to ethanol, an unopened L77 can burn 250lbs of fuel per hour (2.5litres/min), interestingly that works out to be the same Brake Specific Fuel Consumption as when the engine is tuned for petrol: 0.47. Yeah ethanol uses more fuel, but tuned efficiently can get to the same BSFC, then more fuel = more horsepower, and ethanol is cheaper, cleaner and 40% less carbon.

What's the 0-100km for the wagon? Can only find info on the sedan
5.5 seconds manual, 5.6 seconds auto.

Will these engines develop issues like the ls1s ( piston slap, lifter noise, leaky sumps)
Yes L77 make similar noises to the LS1 on cold wet dawn start, a lot better overall, at 160,000k mine still good (85% ethanol not so explosive below 10ºC on a wet morning).

[video=youtube_share;1blRAkgAFWg]http://youtu.be/1blRAkgAFWg[/video]

At 1:20 you can hear a slow-filling lifter for a second or so, they all do that oil quality is the key, otherwise no noise apart from the occasional squeak from front dress when cold.
Rear main seal can be a minor issue on certain variants around 120,000k.
 

ryan101

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Thanks pir4te,
What did you mean not so explosive below 10c?
And what's a front dress? Is that the metallic noise in the video?

So for a untuned car you would say just run 98?
 

PIR4TE

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What did you mean not so explosive below 10c?
Just that it takes half a dozen cranks to blow the dewy, cold air through and spark with ethanol, that's why it's not 100% ethanol available at the pump because it likes to ignite 10ºC - 130ºC, whereas petrol is like -15ºC (or something). So 85% ethanol is called a summer blend, the winter blend has more petrol in it up to 30% currently with eFlex.

And what's a front dress? Is that the metallic noise in the video?
Front dress is the serpentine and A/C belts, pulleys, idlers, tensioners and accessories being driven at the front of the engine.

So for a untuned car you would say just run 98?
Hmmm, depends if you care about what it indirectly represents (jobs, domestic production, environment, better for engine) or what it delivers in cost savings now and into the future.
At 9.5l/100k highway paying $1.18 per litre at the pump the fuel cost per klm is 11¢. 98 maybe uses less 8.5l/100k highway but you are paying $1.75 per litre so per klm is close to 15¢.

Of course put your foot down you get more horsepower using more ethanol, however the stock tune leaves most of that on the table.
 

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Just that it takes half a dozen cranks to blow the dewy, cold air through and spark with ethanol, that's why it's not 100% ethanol available at the pump because it likes to ignite 10ºC - 130ºC, whereas petrol is like -15ºC (or something). So 85% ethanol is called a summer blend, the winter blend has more petrol in it up to 30% currently with eFlex.



Front dress is the serpentine and A/C belts, pulleys, idlers, tensioners and accessories being driven at the front of the engine.



Hmmm, depends if you care about what it indirectly represents (jobs, domestic production, environment, better for engine) or what it delivers in cost savings now and into the future.
At 9.5l/100k highway paying $1.18 per litre at the pump the fuel cost per klm is 11¢. 98 maybe uses less 8.5l/100k highway but you are paying $1.75 per litre so per klm is close to 15¢.

Of course put your foot down you get more horsepower using more ethanol, however the stock tune leaves most of that on the table.
Good info Pir4te. If only it was avbl in more locations. Canberra is a bit to far to go to fill up. Even with a jerry can or two. lol.

BTW your PM inbox is full.
 
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