Getting ready for first tank of E85
Aug 2, 2008, 12:51 PM
#16
I don't. All I change is injector scaling. My trims are perfect for both pump gas and E85.
smoggy: 500 whp will be pretty close to the limit of those RC1000 injectors. I think Lucas was running around 500 whp with 1000s for a while. The engine was jetted pretty lean though, I think around 12.5:1, and with a stock turbo, peak HP earlier in the rpms, so there is more time to inject fuel.
smoggy: 500 whp will be pretty close to the limit of those RC1000 injectors. I think Lucas was running around 500 whp with 1000s for a while. The engine was jetted pretty lean though, I think around 12.5:1, and with a stock turbo, peak HP earlier in the rpms, so there is more time to inject fuel.
Aug 2, 2008, 01:15 PM
#17
Aug 2, 2008, 01:50 PM
#18
Not sure if anyone can really answer this question. I want to get my fuel system prepped in advance so that when I add the ethanol, I have the minimum amount of fine tuning to do.
With my current 100oct tune, if I up my Fuel Pressure Regulator from 43 to 50psi, that should represent ~ 15% global increase in fuel being delivered to the injectors. Of course, this will wreek havoc with my fuel trims. To balance it out perfectly, could I simply rescale my 1000cc injectors from 860 to 989?? That is also a 15% change. That seems WAY too simple, but could it actually balance out perfectly?
With my current 100oct tune, if I up my Fuel Pressure Regulator from 43 to 50psi, that should represent ~ 15% global increase in fuel being delivered to the injectors. Of course, this will wreek havoc with my fuel trims. To balance it out perfectly, could I simply rescale my 1000cc injectors from 860 to 989?? That is also a 15% change. That seems WAY too simple, but could it actually balance out perfectly?
Last edited by Smogrunner; Aug 2, 2008 at 01:53 PM.
Aug 2, 2008, 03:48 PM
#19
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Smoggy, i ran E85 on Denso 660 injectors for 6 months at 125% IDC according to EvoScan 
I finally upgraded to 1000cc when i was able to scrape up some $$. Just keep the boost at moderate levels, and enjoy the ride. When you get bored of the power, then go get some bigger injectors.
I finally upgraded to 1000cc when i was able to scrape up some $$. Just keep the boost at moderate levels, and enjoy the ride. When you get bored of the power, then go get some bigger injectors.
Aug 2, 2008, 06:49 PM
#21
Hello,
Everyone can see my mods in my signature below. I currently drive only on 100 octane with the following general settings: 23 to 24psi max boost; ~11.9 to 12.0 max afr on my Zietronix wideband during WOT pulls, and 12 to 15 degrees max timing.
In EcuFlash, my Injector Scaling is set at 860. I use RC 1000cc injectors, have two in-line Walbro fuel pumps, an adjustable fuel pressure regulator, and an AMS fuel rail.
So, the big question: If I'm flat out of gas, pull up to an E85 pump and "fillerup" to the top, can't I just reset my injector scaling downward 33% to add the needed fuel?
860 - 33% = 576.2
So, type in 576 in my Injector Scaling table, flash it in, and drive away?? Shouldn't it drive fine? Next step (in my mind) would be to carefully log and adjust, of course, but if I'm not racing around, shouldn't I be fine until then?
Everyone can see my mods in my signature below. I currently drive only on 100 octane with the following general settings: 23 to 24psi max boost; ~11.9 to 12.0 max afr on my Zietronix wideband during WOT pulls, and 12 to 15 degrees max timing.
In EcuFlash, my Injector Scaling is set at 860. I use RC 1000cc injectors, have two in-line Walbro fuel pumps, an adjustable fuel pressure regulator, and an AMS fuel rail.
So, the big question: If I'm flat out of gas, pull up to an E85 pump and "fillerup" to the top, can't I just reset my injector scaling downward 33% to add the needed fuel?
860 - 33% = 576.2
So, type in 576 in my Injector Scaling table, flash it in, and drive away?? Shouldn't it drive fine? Next step (in my mind) would be to carefully log and adjust, of course, but if I'm not racing around, shouldn't I be fine until then?
What is not given is your IDC%. Simply calculate how much fuel you are currently flowing. Then calculate 30% more flow for E85, along with a reasonable margin, and this is the size injector you need assuming you plan to run at approx the same boost level you are at now. If you plan to turn up the wick, then calculate accordingly.
You will be fine with the 1,000cc injectors, however, you may not be able to run as much boost as you do now.
Aug 3, 2008, 09:05 AM
#22
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Not sure if anyone can really answer this question. I want to get my fuel system prepped in advance so that when I add the ethanol, I have the minimum amount of fine tuning to do.
With my current 100oct tune, if I up my Fuel Pressure Regulator from 43 to 50psi, that should represent ~ 15% global increase in fuel being delivered to the injectors. Of course, this will wreek havoc with my fuel trims. To balance it out perfectly, could I simply rescale my 1000cc injectors from 860 to 989?? That is also a 15% change. That seems WAY too simple, but could it actually balance out perfectly?
With my current 100oct tune, if I up my Fuel Pressure Regulator from 43 to 50psi, that should represent ~ 15% global increase in fuel being delivered to the injectors. Of course, this will wreek havoc with my fuel trims. To balance it out perfectly, could I simply rescale my 1000cc injectors from 860 to 989?? That is also a 15% change. That seems WAY too simple, but could it actually balance out perfectly?
New Pressure: 50 PSI
Old Flow Rate: 1000 cc/min
New Flow Rates: 1072.11 cc/min or 102.01 lbs/hr
This is a calculator off of the RC Engineering site.
http://www.rceng.com/technical.aspx
I have a similar setup to you I run E85 I run 53 psi of fuel pressure I scale down from 880 to 750 no latency's changes I add lots of timing down low. Load values on the stock maf was a problem for me so I went to the MAFT GM maf in blow mode.
Boost for me is max 30psi do to 1000cc injectors....need 1200cc and I need to add a in line pump.
I'm not sure how many RPM's a 2.3 can spin but it's a huge factor if you go past 8K.
With your set up you would be at 105+IDC at 8K with 30psi. 93 IDC at 25 psi. at 43psi at the rail. My 2.0 is 91 IDC at 30 psi and 8K at 43 psi at the rail....which is still to high on the IDC's for me.
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