In Praise of the ZF 8 Speed

[Orange01z28]

98 is around 7.85
95 is around 7.1$/gal

Do they measure octane differently there or do you guys just get better gas?

Sponsored

 

[InvertedLogic]

Do they measure octane differently there or do you guys just get better gas?

Different measurement methods Octane rating - Wikipedia


98 RON in Belgium is the same as 93 AKI in the US.

 

[Dim]

Do they measure octane differently there or do you guys just get better gas?

yeah in EU we use RON indice and in US its PON
basically our 95 equals your 91 and our 98 equals your 93

 

[Dim]

yeah in EU we use RON indice and in US its PON
basically our 95 equals your 91 and our 98 equals your 93

and i dont know about US but now here they add Ethanol on 95 its calles 95E10 means 10% of ethanol

 

[NachoRuby]

and i dont know about US but now here they add Ethanol on 95 its calles 95E10 means 10% of ethanol

Almost all US gasoline is 10% ethanol (all octanes). It has been for a long time here (decades). We also have 15% and 85%. We can still get ethanol free, but it's not mainstream. I only use it on my old classic car and my snowblower, because they sit around a lot of the time not being used.

 

[rubicon4wheeler]

Almost every vehicle I've ever owned over the last 30 years has been a manual transmission. Automatic transmissions were always so terrible, but finally they've gotten to be better than manuals. I still would have preferred a manual behind my diesel, but since the only transmission available for that is the 8HP75 and it happens to be one of the best automatics ever made, I decided to go for it. The ability to manually shift it when the transmission "brain" can't figure out what I want is fantastic. I still find my left foot trying to stomp on a clutch pedal that doesn't exist while my arm reaches for the shifter, but I'll eventually grow out of that. Overall, no regrets!

 

[Rusty PW]

Almost all US gasoline is 10% ethanol (all octanes). It has been for a long time here (decades). We also have 15% and 85%. We can still get ethanol free, but it's not mainstream. I only use it on my old classic car and my snowblower, because they sit around a lot of the time not being used.

E85= cheap race gas. Octane between 100 to 105. On a forced induction motor. It's good for 100 plus HP. But you have to be tuned for it.

 

[misterturbo]

Drive a ford 10 speed, and you’ll wish it had a ZF. Absolute garbage One of many reasons I ditched my Raptor. ZF makes fantastic transmissions, have had ZF in almost every car over the past 5 years and they rock. Even the ZF in two BMWs were fantastic.

 

[ShadowsPapa]

Mine hangs onto gears for an uncomfortably long time when I'm towing, it doesn't seem to like the additional load. If it really bothers me I just manually shift it. I wish they would tweak the shift logic a tad for those conditions, but overall I'm very happy with the 8 spd

It's doing exactly what it should be doing to prevent lugging or over-loading the engine. The thing knows the torque output.
People need to get over the engine revving for HP. Don't sweat it when it's cranking 2500 RPM or better. No big deal. Hell, these are still in economy mode - low lift intake valve mode up to 2800 RPM.
We were on the FLAT in Florida and there was a head-wind and my truck never left 7th gear, running in the lower 2,000s much of the time were were on that highway. It's normal.
LET IT WIND UP!

 

[ShadowsPapa]

E85= cheap race gas. Octane between 100 to 105

The octane of pure ethanol is estimated to be about 109 according to official gov docs, so E85 will be less than that.
However, a couple of universities say it's 100, others have it between 100 and 110. +
And in fact, they can't actually measure it because the engines made to measure octane run carburetors so once a certain amount of ethanol is added to gas, it's an estimate.
A number of guys build old-school engines, re-tune the carbs and run pure ethanol or E85 for racing. Like you said - it needs high compression and very different tunes.

 

[Rusty PW]

The octane of pure ethanol is estimated to be about 109 according to official gov docs, so E85 will be less than that.
However, a couple of universities say it's 100, others have it between 100 and 110. +
And in fact, they can't actually measure it because the engines made to measure octane run carburetors so once a certain amount of ethanol is added to gas, it's an estimate.
A number of guys build old-school engines, re-tune the carbs and run pure ethanol or E85 for racing. Like you said - it needs high compression and very different tunes.

Between it and 93 in my twin turbo Nismo It's good for a 120HP increase. 583 to 703 HP on the dyno.

One of many dyno runs. Have over 30 dyno runs on the car.

 

[ShadowsPapa]

Between it and 93 in my twin turbo Nismo It's good for a 120HP increase. 583 to 703 HP on the dyno.

One of many dyno runs. Have over 30 dyno runs on the car.

My Silverado woke up with E85 and towed better, with less effort.
I REALLY wish the JT was flex fuel.

 

[Rusty PW]

My Silverado woke up with E85 and towed better, with less effort.
I REALLY wish the JT was flex fuel.

With E85. The ecu will run with more timing before it detects knock.
When I switch to the E85 map and run it. It really drinks the stuff like an alcoholic on a 3 day binge.

 

[Escape.idiocracy]

jeez my engine must probably hate me ;-) i think on 25000 miles he saw 5 times up to 4000 rpm ;-)
most of the time im driving it like my old GTD with DSG gearbox

I’m pretty jealous of the GTD…. I’m getting ready to put a gtb2265vk in our mk6 sportwagen- waiting on a cp3 pump to ship…. Canadian customs or something ??‍?. Wish we got the GTD or the 4motion tdi’s on this side.

 

[Dim]

Drive a ford 10 speed, and you’ll wish it had a ZF. Absolute garbage One of many reasons I ditched my Raptor. ZF makes fantastic transmissions, have had ZF in almost every car over the past 5 years and they rock. Even the ZF in two BMWs were fantastic.

I heard , don’t know if it’s true , but it’s possible than BMW has a team of ingénieurs working at ZF directly to specially develop in intern the ZF gearbox for BMW . Which I can believe when you see how work a ZF on a BMW . Almost as good as the DSG . It’s impressive

Sponsored