Everything posted by olavxxx
hi, talk to frpe82 on http://forums.turbobricks.com they have made an E85 chip for the odb-II s/v90 cars (b6304fs2). I know there is potential in this engine.. I once got 242hp on the earlier b6304 (204hp version) just by exhaust and intake mods.. also cat removal (premium fuel). Fred, as he is called, will now put on bmw headers, larger exhaust, also he has already tuned for E85. I dont think they sell the E85 tune yet, but if people say they are interested, I'd guess it will go faster in production. He works in a tuningcompany called HI-Tuning: http://www.hi-tuning.com/ 270++hp should be doable, but I dont know if you need the earlier cams for that...
Please look at this table, regarding retardation/advance of ignition: http://www.msextra.com/ms2extra/MS2-Extra_Tuning_Manual.html#emissions I know E85 is not regular gasoline and that most emissions are lower on E85. Though, this is not true for 100% of the emissions, also the same physics would apply to E85 as the regular fuel, when retarding or advancing emissions. I know that url is for megasquirt too and that it's an unknown engine, engine-x. Also, remember: Retarding creates a hotter exhaust, not a colder one! Selecting the right spark plugs could also be a challenge, maybe one range colder.. eg. if you had bkr6es, go to bkr7es. If turbo, maybe bkr8es.. Howver, this is emissions, not peak power.. but it's some basic info that holds true for most of us. On my gf's car, we ran the e85 + 3 deg. advanced and it runs very well. I use two rocker switches to choose -3|0|+3, but it's always used in the +3 position :-) I can feel it's much stronger at part throttle.
What you have to consider, is the fact that some engines are "mapped" to be able to run on lower grade fuels. Those engines are sometimes "pulled" on the ignition, so they can be run on the lower grade fuels. I know this is true for most older volvos.. Example of E85 conversion on a LH2.4 volvo: turbo injectors + resistors That's it! You dont have do do anything more.. But, it's not like E85 alone will give you more power, but on the ignition control unit, you can control ignition -6 | -3 | 0 | +3. So, connecting pin 18 + pin 19 + pin 20, you get +3. pin 18 + pin 20 = -3 pin 19 + pin 20 = -6 nothing, or 18+19 = 0. I know this is mumbojumbo, but the +3 works even on premium unleaded and it does indeed give more power. On E85 it works too! I must say that the engine also makes a more powerfull sound (maybe because e85 also gives a bit more exhaust?). Havent dynoed it, but my guess is about 5% increase in power.. Ps the engine has fairly high CR.. 9.5:1.. Will fit a very tight squish headgasket and turbocharge it, for more power. ~~200hp vs stock 116hp, with used parts from turbo volvos :-) oh btw.. advancing the ignition gives more exhaust emissions.. retarding gives hotter exhaust which helps burn gasses. So, remember to not over advance before emissions test :-) I'll go for colder plugs when the turbo comes on.. bkr7es or bkr8es instead of bcpr6es.