E85 vs Pump and Alky
Dec 22, 2008, 08:26 AM
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Dec 22, 2008, 08:33 AM
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I would run E85 and Alky, matter of fact I think that is what I am going to try this next year. To answer your question, it all depends on the tune. I would think that E85 would make more power since it is oxygenated though.
Do both, it would be fun and make tons more power.
Do both, it would be fun and make tons more power.
Dec 22, 2008, 08:35 AM
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Lol that would be sick but I am just trying to get an answer if E85 is going to make a lot more power than 93 and alky. Because a double pumper and atleast 1200cc's are not cheap if im only going to pick up a few ponies.
Dec 22, 2008, 08:36 AM
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You are going to get more power out of E-85 then 93 and 100%meth.
I would also combine them and it would be awesome. Actually I would do 50/50 water and meth but either way you cant go wrong with E-85.
Mitch M
I would also combine them and it would be awesome. Actually I would do 50/50 water and meth but either way you cant go wrong with E-85.
Mitch M
Dec 22, 2008, 08:45 AM
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Unless you want a seriously high strung car, I would only run E-85 as I think you will find it enough. E85 makes great power, and tuning with Alky/Meth on top of it is still another system that can fail. I think most people that have been running E85 for quite some time will tell you that you really don't need anything but the E85. At least in the 8+ months I have been running it, I don't think/feel like I want to even put it on my car, not only because it's one more system to fail, but E85 is such an awesome fuel that I simply feel as though I don't need anything more.
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Dec 22, 2008, 01:41 PM
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e85 is the way to go.......depending on your hp goals depends how big you need to take your fuel system.
I suggest review the alternative fuels thread for info......
I suggest review the alternative fuels thread for info......
Dec 22, 2008, 05:13 PM
#10
E85 is excellent fuel but the more we tune on it the more we find a large difference in the quality of the fuel. There should be two varieties available, E85 and E70. E70 is used in the northern climates for better start up in the winter months. Remember E85 is blended using 87 octane too.
When it comes to pump gas/alky and tuning you have to think about what octane you are staring with and how much alky you are going to inject. There are alky nozzles that are very small and will only require about 7% of the fuel to be trimmed out to keep the same AFR's as you had without the alky injection. Then there are nozzles that will require a much larger amount of fuel to be trimmed.
There's been extremely good power made on both combinations. Personally, if I had to chose I'd take some real E85.
When it comes to pump gas/alky and tuning you have to think about what octane you are staring with and how much alky you are going to inject. There are alky nozzles that are very small and will only require about 7% of the fuel to be trimmed out to keep the same AFR's as you had without the alky injection. Then there are nozzles that will require a much larger amount of fuel to be trimmed.
There's been extremely good power made on both combinations. Personally, if I had to chose I'd take some real E85.
Dec 23, 2008, 11:59 AM
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If you have stations in your area, go E85. Not sure you'll need 1200's AND a double pumper unless you're running a pretty good sized turbo. I run 1000's and a Walbro on 27psi stock turbo. Lots of guys around here, including 2 who made the fastest stock turbo list on EvoM for 08 were running just like that. My tuner (who was on that list) switched to a 850R and ran the 1200's to 105% at 500+whp...if you're in that league, the double pumper might be needed.
Dec 23, 2008, 12:55 PM
#12
Methanol runs out. E85 runs out too, but then you just go back to the station and fill up 
E85 in summer is the best way to go, but as David pointed out, you still need to be careful that you are getting what you think you are. What I typically do is use "control fuel" so I know what the cruise AFRs are (I run open loop all the time) and if they swing one or the other I know something has changed.
For instance, we have a station here that during summer was selling E85 that was closer to E98 than E85. It was obvious since the idle would lean out, cruise would lean out, etc. Whereas when I mixed E85 or ran straight E98 I had a baseline for those values. Recently they only just switched to E70 here and it was as dramatic a swing to rich as the E98 had been lean.
E85 in summer is the best way to go, but as David pointed out, you still need to be careful that you are getting what you think you are. What I typically do is use "control fuel" so I know what the cruise AFRs are (I run open loop all the time) and if they swing one or the other I know something has changed.
For instance, we have a station here that during summer was selling E85 that was closer to E98 than E85. It was obvious since the idle would lean out, cruise would lean out, etc. Whereas when I mixed E85 or ran straight E98 I had a baseline for those values. Recently they only just switched to E70 here and it was as dramatic a swing to rich as the E98 had been lean.
Dec 23, 2008, 01:51 PM
#13
E85 Hands down. This has been discussed back and forth with us Buick guys. The fact that you don't have to install an alky system is a plus. Only con is that you will have to refill the tank much quicker. Not sure off hand but I think you use around 60% more fuel when using E85 due to the air/fuel ratio needing to be decreased. Its also better for your engine (oil will last longer etc). Again, you will have to search this stuff on the internet, but this is just off the top of my head. As Buschur mentioned, we have found different qualities of E85 out here, but if you tune for the worst case scenario, one would think you would be ok. 
Dec 23, 2008, 02:44 PM
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E85 is excellent fuel but the more we tune on it the more we find a large difference in the quality of the fuel. There should be two varieties available, E85 and E70. E70 is used in the northern climates for better start up in the winter months. Remember E85 is blended using 87 octane too.
When it comes to pump gas/alky and tuning you have to think about what octane you are staring with and how much alky you are going to inject. There are alky nozzles that are very small and will only require about 7% of the fuel to be trimmed out to keep the same AFR's as you had without the alky injection. Then there are nozzles that will require a much larger amount of fuel to be trimmed.
There's been extremely good power made on both combinations. Personally, if I had to chose I'd take some real E85.
When it comes to pump gas/alky and tuning you have to think about what octane you are staring with and how much alky you are going to inject. There are alky nozzles that are very small and will only require about 7% of the fuel to be trimmed out to keep the same AFR's as you had without the alky injection. Then there are nozzles that will require a much larger amount of fuel to be trimmed.
There's been extremely good power made on both combinations. Personally, if I had to chose I'd take some real E85.
no need for alky with e85!! Just get e85 and call it a day!!!
David im surprise you couldnt play with the aem and fix the cold start up??