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About WeldingRod

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  1. Thanks ! Yes, TinkerFreak already pm'd me about his Subie, and mentioned he lived close to Aurora. He said there is a new Track east of town, and Bandimere will close in October. It sounds like he has one fast 2.0 Subie! I'm still piecing together the motor and the fuel system, and I'll be running out of time fast. I'll be a little scarce for a couple months, with my head buried in the motor/trans/fuel system build up, among other items. I'll be back tuning once I get the beast on the road. I'm a little unfamiliar with Denver so it's good to here there are a few track-venues to go have some fun test'n tune action! I may need a little education from you guys on what direction your going on cold enrichment adjustment, on my eec strategy it's all open loop cold-start settings. I'd guess you guys are going further lean, with 60lbs injectors (x8) I have trim that up a bit already. Going to take some time, but I'm eager to get there.
  2. Thanks for the clarification. I would like to believe that E85 is the same across the whole country. Unfortunately that doesn't make it a reality. DOT3 brake fluid, and 91 octane fuel are also supposed to be the same from all suppliers, but there is plenty variation. Yes, I'm compensating with more boost, and some added compression. I know exactly where MBT spark is (max brake torque- most power achievable for a motor); In some instances your better off backing up a bit from MBT, depending the induction configuration you don't need the small power increase from a few more degrees of timing, vs. the risk of detonation and motor damage you may see from it. Of course there are many implementations of knock retard that can be used, I just don't like relying on corrective action and running on the ragged edge. You are correct, one can go too far with timing, even before maximum power is reached. That's the great part of tuning your own engine, if 5000 ft requires some further tweaking it's all in the palm of my hand. It sounds like I'll be ok with the fuel out west. Thanks again guys.
  3. Thanks guys, it sounds like you are familiar with the fuel provided from these pumps, and feel comfortable that it matches the octane stipulated at the pump (E70 or E85); Now just to avoid any confusion, you mention that fuel in Denver (due to altitude) is typically 2 points lower. Do you mean then that considering the octane rating of E70 = 95; Then E70 in denver would be equivalent to 93 octan, or 94.8 octane? Typically a point is 0.1; That may not be what you were inferring, just trying to clarify. I'm building an oversized fuel system, and can run the additional flow needed for 30% more fuel; I will custom tune the A/F ratio, and spark on E85 here in MI, and I'll also test it with E70 to see if I need to back off the timing with Winter fuel. If it's 95 octane I should be fine. E85 would actually alow me to go nuts with the timing and A/F with that high of octane, but I'll keep it conservative and keep the head-room of the octane rating as extra insurance. Thanks, Don
  4. I'm moving to the burb's of Denver (nice neighborhood in Aurora, CO); I have a car that requires 93 Octane fuel (or better); Here in Michigan you can buy 93 or 94 Octane, and even higher at some stations (more expensive fuel of course); I have a high-performanced super-charged engine, and after I move to Denver, fuel selection is going to be of great importance (to avoid detonation); From what I've seen it is likely not feasible to find 93 or 94 octane fuel in Colorado. What seems much more likely is finding E85, which is actually better for my engine setup. (burns cooler, and mitigates detonation better); With that introduction being made. The question is the real content seen at pumps in Denver/Aurora, CO; I've seen mixed reports of the actual fuel being sold at the pump. E75, E7X, E85???? What kind of fuel, or octane are you really able to get in that area? E98 is actually pure, but this is bad for starting in cold weather; E85 has some gasoline content for cold starting; Winter blends have more gasoline, and less ethanol for better cold starting. Each step of dilution with gasoline, is a step closer to detonation for me; With the high altitude of denver, I have no doubts that E85 is not really E85, as most do not need the high octane capability. I do however need every bit of the Ethanol... (9.4 to 1 compression with 16 lbs of supercharged-boost!!!) Thanks in advance for any information on fuel quality or content.
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