E85 and photo shoot
07-13-2009, 06:41 PM
#17
Drifting
07-13-2009, 07:44 PM
#19
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^good god thats beautiful.
Dude what can I say. Your car is simply stunning! We need more info! How much timing advance? Also why are you running such low fuel pressure? Do you think you could clear your boost goals by going 2-3bar of fuel pressure?
I only ask because I'm running 83lb injectors and a 044 pump and I have hopes for 22ish psi at 3bar fuel pressure.
Dude what can I say. Your car is simply stunning! We need more info! How much timing advance? Also why are you running such low fuel pressure? Do you think you could clear your boost goals by going 2-3bar of fuel pressure?
I only ask because I'm running 83lb injectors and a 044 pump and I have hopes for 22ish psi at 3bar fuel pressure.
07-13-2009, 08:00 PM
#21
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He states 1.25 here. Unless he means 1.25 bar boost pressure but, I don't think so because he just stated he was only running .9-1.0bar boost pressure.
07-13-2009, 08:08 PM
#22
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Ah, I read it as he started at ~.9bar boost for the E85 conversion, then upped it to 1.25bar boost but then maxxed his fuel setup.
I'm sure Duke can clarify it for us
-Rogue
I'm sure Duke can clarify it for us
-Rogue
07-14-2009, 05:24 AM
#24
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If he's maxing out 100lb injs it's way more than 1.25 fp.
Duke what fpr are you going to run with those 160s?
Duke what fpr are you going to run with those 160s?
07-14-2009, 05:54 AM
#25
Nordschleife Master
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First of all, thanks a lot for all the comments! It's appreciated 
Unfortunatly I don't have any good data logs from earlier this season to compare spoolup. At the same time EGT goes down both from added advance and the fuel itself so I'm not sure if the spoolup will be reduced. But even if the spoolup isn't reduced I think the transitional acceleration will be faster due to the added power. Let's compare stuff 
Bridgestone RE540S. An old R-compound tire.
Oh don't worry, I'm sure it won't be long before hitting the jackstands again lol
Nice car, I haven't seen any other 944/968's with them either. I have slightly wider wheels, 8.5" and 11" rear. I need to space them out a bit though. They sit too far in. 3 degrees of negative camber also tend to tuck the wheels in.
When I'm through with this tank of fuel I will add another 2 deegrees of advance. I've been working a lot on the ignition and the result is a map that is pretty aggressive compared to others. I have very little backpressure too which also helps. You really need to ramp up the ignition at higher revs on these engins. Currently at 7000 rpm and 1.2 bar of boost I have 28.5 deg advance. Not something I recommend as a base setting
My fuel pressure is 3.0 bar static. I'm maxing out the 1000 CC injectors at 1.2 bar but I'm still in the tuning process so I'm running too rich.
I will run the 1600 CC injectors at 2.5 bar static FP.
But I'm close to maxing out the fuel pump so I don't know if I'll switch injectors until another pump is in place. 1000 CC x 4 cyl x 100% DC equals 4 liter per minute which is almost at the 044 pump limit.
Bridgestone RE540S. An old R-compound tire.
Oh don't worry, I'm sure it won't be long before hitting the jackstands again lol
My fuel pressure is 3.0 bar static. I'm maxing out the 1000 CC injectors at 1.2 bar but I'm still in the tuning process so I'm running too rich.
I will run the 1600 CC injectors at 2.5 bar static FP.
But I'm close to maxing out the fuel pump so I don't know if I'll switch injectors until another pump is in place. 1000 CC x 4 cyl x 100% DC equals 4 liter per minute which is almost at the 044 pump limit.
07-14-2009, 07:34 AM
#26
Drifting
Thanks, yours looks excellent in that colour too. I have a set of KW's ready to go on when I have time to reindex the torsion bars, should have a similar ride height to your setup then.
07-14-2009, 09:14 AM
#27
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How quickly are you going through a tank of E85 Duke, when on boost? I find I can go through it really pretty quick, especially at the track. I have to take 4 20lt Jerry Cans just in case as back up. I want to play with the advance too. I haven't touched mine yet. How are you logging knock though? Do you have the Knock Block?
07-14-2009, 09:27 AM
#28
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Well at 100% DC it consumes about 4 liter a minute
Logging knock with knock block and listening through headphones.
Not much use tuning for knock on E85 though so you have to be sure your base ignition map is sorted before switching.
Logging knock with knock block and listening through headphones.
Not much use tuning for knock on E85 though so you have to be sure your base ignition map is sorted before switching.
07-14-2009, 09:28 AM
#29
Nordschleife Master
Thread Starter
Oh and it's when you start playing with advance the real advantages of E85 shines through.
Will be doing some tuning this afternoon. I'm excited about the 60-100 mph time at 1.2 bar.
Will be doing some tuning this afternoon. I'm excited about the 60-100 mph time at 1.2 bar.
07-14-2009, 10:14 AM
#30
Rainman
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holy crap haha
not sure about the specifics of ethanol vs gasoline (weight per volume, actual energy content per voilume) but with some extremely crude and most likely incorrect math i just did if you were burning gasoline at that rate itd put you around 750HP. is that accurate at all? lol
not sure about the specifics of ethanol vs gasoline (weight per volume, actual energy content per voilume) but with some extremely crude and most likely incorrect math i just did if you were burning gasoline at that rate itd put you around 750HP. is that accurate at all? lol