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Discussion Starter · #1 ·
Ok This is my 1st post here but hope to make this place a regular stop for me.

Made some time today to get some Dyno results with a 100% Stock Q50, both runs were done in 4th gear.

This is using EcuTek ProECU to program the stock ecu. The car is running 93 octane.

In the coming week the plan is to test it out with an exhaust and going to try some E85 in it. I think the 11:1 compression is going to like some high octane fuel.
 

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3.7l ?
 

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Paging papadoc to the white courtesy phone.
 

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where can u get 93 octane in LA? and E85 too.. so far I only able to pump 91... not like Asia I able to pump 95..
 

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Ok This is my 1st post here but hope to make this place a regular stop for me.

Made some time today to get some Dyno results with a 100% Stock Q50, both runs were done in 4th gear.

This is using EcuTek ProECU to program the stock ecu. The car is running 93 octane.

In the coming week the plan is to test it out with an exhaust and going to try some E85 in it. I think the 11:1 compression is going to like some high octane fuel.
Nice, flat torque curve, almost like a turbo charged engine. Is E85 supposed to be better? I heard it's higher octane (not to be confused with the amount of octane in a fuel), but also a much lower energy fuel. (2 carbon atoms to break up per molecule versus the 8 in octane.)
 

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Nice, flat torque curve, almost like a turbo charged engine. Is E85 supposed to be better? I heard it's higher octane (not to be confused with the amount of octane in a fuel), but also a much lower energy fuel. (2 carbon atoms to break up per molecule versus the 8 in octane.)
E85 is definitely better fuel to use on higher compression motors. I used it as an alternative to C16 race fuel on my 14:1 comp Honda.
 

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Interesting but none of these fuels are available in beautiful so. Cali where we will get our first big winter rain in Feb.:cool:
 

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You can run E85 in a Q50? I thought it was recommended to use 91 Octane or higher. I had a 2011 Avalanche with the 5.3 V8 that was built as an E85 compatible engine (had the E85 badge on it). Ran okay but gas mileage dropped 10-15% using it and performance was sluggish.
 

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E85 is definitely better fuel to use on higher compression motors. I used it as an alternative to C16 race fuel on my 14:1 comp Honda.
I'll have to read up on it more. I do remember hearing about some Swedish small production or maybe prototype super car that had a really high compression engine and actually benefitted from the cooling effects that running on ethanol apparently gave it.
 

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Interesting but none of these fuels are available in beautiful so. Cali where we will get our first big winter rain in Feb.:cool:
that was the exact point I try to bring.. this tune is pointless if it only benefits the ppl in a small area... and ofcoz you gonna get a better chart when u r using better fuel.. just saying ;)
 

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Interesting but none of these fuels are available in beautiful so. Cali where we will get our first big winter rain in Feb.:cool:
Check the web. It's available in the bay area.. but not at many gas stations.
So I bet it's available where you live.

But before everyone goes pumping E85.
1) It may void your warranty. Generally anything over 10% ethenal voids the warranty.
2) It may not do much without a tune. Which is probably what Bill will show.. with a tune and E85 good things may happen.


that was the exact point I try to bring.. this tune is pointless if it only benefits the ppl in a small area... and ofcoz you gonna get a better chart when u r using better fuel.. just saying ;)
Might be right. But at least he showed a mod prior to using it.
 

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e85 is slim pickens here in So.Western Pa. Only know of 1 station that has it. 93 Octane on the other hand is everywhere.

Interesting to see what kind of tuning can be done on this car. I used to tune my mazdaspeed6 with the cobb ap.
 

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e85 is slim pickens here in So.Western Pa. Only know of 1 station that has it. 93 Octane on the other hand is everywhere.

Interesting to see what kind of tuning can be done on this car. I used to tune my mazdaspeed6 with the cobb ap.
There's a dragstrip a few miles away from me

:: CECIL COUNTY DRAGWAY ::

so the local Sunoco station has 100 octane racing gas. This stuff will put hair on your hood.
 
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Ok This is my 1st post here but hope to make this place a regular stop for me.

Made some time today to get some Dyno results with a 100% Stock Q50, both runs were done in 4th gear.

This is using EcuTek ProECU to program the stock ecu. The car is running 93 octane.

In the coming week the plan is to test it out with an exhaust and going to try some E85 in it. I think the 11:1 compression is going to like some high octane fuel.
Nice I need to pass by your shop and put my car on the dyno to compare numbers with this Q. Maybe go to the track and do some real world testing! :)
 
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Nice I need to pass by your shop and put my car on the dyno to compare numbers with this Q. Maybe go to the track and do some real world testing! :)
+1

Would love to see that! :D
 

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that was the exact point I try to bring.. this tune is pointless if it only benefits the ppl in a small area... and ofcoz you gonna get a better chart when u r using better fuel.. just saying ;)
Tuning is never pointless, you can tune a car to its max potential on any given octane fuel. Tuning will always benefit you and will never hurt you if done right. This is a great modification for any driver. Tuning a car properly will allow it to run as efficient as possible without jeopardizing performance, it actually increases performance as you see on the graph the OP posted.
 

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Discussion Starter · #18 ·
Nice, flat torque curve, almost like a turbo charged engine. Is E85 supposed to be better? I heard it's higher octane (not to be confused with the amount of octane in a fuel), but also a much lower energy fuel. (2 carbon atoms to break up per molecule versus the 8 in octane.)
E85 will make more power, here in South Florida it is very available, it is 105 octane, It does have 30% less energy by volume. The fuel mileage is lower by 10-15%, but the fuel is generally 15-20% less expensive than premium fuel.

Interesting but none of these fuels are available in beautiful so. Cali where we will get our first big winter rain in Feb.:cool:
The OEM tune in this car adapts based on fuel quality. I am very familiar with how the ignition timing logic works. Even with 93 octane fuel here, I gained 1hp by advancing the ignition timing. On 91 the gains will absolutely be less. But not nothing. The advantage of tuning is the ability to maximize modifications like exhaust, intake work, fuel changes etc.

Check the web. It's available in the bay area.. but not at many gas stations.
So I bet it's available where you live.

But before everyone goes pumping E85.
1) It may void your warranty. Generally anything over 10% ethenal voids the warranty.
2) It may not do much without a tune. Which is probably what Bill will show.. with a tune and E85 good things may happen.

Might be right. But at least he showed a mod prior to using it.
Ok do NOT go out and pump E85 in a Q50. The fuel system from factory is not adequate, in its OEM configuration I was seeing above 90% injector duty cycle. E85 needs more fuel (especially at wide open) The car is not designed for it.

With a minimum of upgraded fuel injectors and a tune, i hope to find out what the gains are shortly. Its not for everyone, but with 370z's I have seen a 20whp gain from ethanol.

that was the exact point I try to bring.. this tune is pointless if it only benefits the ppl in a small area... and ofcoz you gonna get a better chart when u r using better fuel.. just saying ;)
This car is knock limited from factory, meaning that even with the 93 octane the car can benefit from higher octane fuel. So the power gained is NOT from increasing the ignition timing. The best gains I found were leaving that alone and taking a bit of fuel out of it and tuning the VVEL and VVT.
I would not expect 15hp on 91, but I would expect at least 1/2 of that gain. Not a lot, but not nothing. I also have done some work with faster shifting. I have done some work with my V-Box performance meter to see the gains with that.
 

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You can run E85 in a Q50? I thought it was recommended to use 91 Octane or higher. I had a 2011 Avalanche with the 5.3 V8 that was built as an E85 compatible engine (had the E85 badge on it). Ran okay but gas mileage dropped 10-15% using it and performance was sluggish.
Yes 91 octane or higher is recommended but with bigger injectors and a bigger fuel pump you can run E85 when tuned properly. I know a couple guys that have done this to there naturally aspirated VQ37vhr's and the gains are not worth the money spent unless your running forced induction "Turbocharged/Supercharged", none the less I would like to see the results on the Q50s.
 

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Discussion Starter · #20 ·
Nice I need to pass by your shop and put my car on the dyno to compare numbers with this Q. Maybe go to the track and do some real world testing! :)
Just let me know. I am sure we can get a time to meet up and make it happen.

Other place thats great down here is 1/8 and 1/4 mile racing. I absolutely like to verify and test at the track. Tuning at the track also has some benefits too for performance.

I can't tell you how many times I have made a change on the dyno and it showed nothing, and I go to the track and it improves. What matters is performance. A Dyno is a tool that can show performance. But real world is what matters
 
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