MRTurbo
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Re:E85 Fuel to Caltex
Thursday, May 12, 2011 6:26 AM
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Yeah around town in traffic I love the CT26 due to the quick spool and mid range grunt. I've driven a big 6.0L V8 around town and wasn't that impressed in the overall driveability advantage compared to the MR2. ECU temp sensor looks pretty new to me (shiny copper/not faded) probably replaced by previous owner. I put in a new O2 sensor last year but didn't really notice any difference in economy - maybe the old one wasn't shagged? but I wouldn't have a clue if its working or not and looks like its wired fine. How can i test it? Edit: I should note that it runs about 12.8l/100km in mostly city traffic mostly taking it easy.
post edited by MRTurbo - Thursday, May 12, 2011 6:32 AM
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i 
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MuMan
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Re:E85 Fuel to Caltex
Thursday, May 12, 2011 7:10 AM
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There's a couple of basic tests outlined in the BGB, but the real indication is logging an AFR trace. Just make sure both are actually OEM as the temp sensor is Toyota specific, and the O2 is engine specific..so the universal ones don't quite cut it.
Only other thing that comes to mind is weeping injectors, although they usually show up as a hot start issue , after sitting for awhile.
Also the AFM temp sensor, if it's reading low will richen up EFI rather dramatically.
"Have you ever noticed when things get set in motion, the heavy end wants to go first."
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purple5ive
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Re:E85 Fuel to Caltex
Thursday, May 12, 2011 10:47 PM
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i wonder what a chipped ecu like the blitz, etc on the gen 2 running the 80/20 mix will do?
might be the right combination
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MuMan
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Re:E85 Fuel to Caltex
Saturday, May 14, 2011 1:58 AM
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I had a set of 3D techtom maps somewhere, that most of the chipped ECU's are based on. I'll post them up if I can locate them.
Anyhow, most noticeable was the EFI map where the only changes were to the very upper levels, where all the fuel dumping takes place, even then the altered values looked to be a bit on the conservative side. On the other hand, the Ign map was altered considerably, with added in values from around 3k or there abouts, naturally increasing at the upper levels to accomodate EFI changes.
I doubt there's much to be gained on 98 with these chipped ECU's due to the more aggressive Ign curve, but yes I think on an Ethanol blend like 80/20 there would be considerable gains for sure.
"Have you ever noticed when things get set in motion, the heavy end wants to go first."
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purple5ive
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Re:E85 Fuel to Caltex
Sunday, May 15, 2011 10:33 PM
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i went looking for e85 and found nothing, apparently the stopped supplting it to victoaria, well atleast the pump i went to anyway
so i couldnt test it out
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MRTurbo
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Re:E85 Fuel to Caltex
Sunday, May 15, 2011 11:19 PM
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I ran about 4 or so litres (thats all i could fit) in my Gen 2 on the weekend and that was even enough to make a difference, engine felt more 'lively' and wanted to rev more than usual. Pity the stock DP and substandard exhaust were holding it back... gotta fix that soon!
post edited by MRTurbo - Sunday, May 15, 2011 11:22 PM
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
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Re:E85 Fuel to Caltex
Monday, May 16, 2011 2:55 AM
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I'm using E85 in my SW20 racer. I've heard that the fuel from Caltex is a lot more variable regarding quality compared to what you can buy from United servos.
No issues with the car so far. Had to buy 1000cc injectors. I already have a Walbro pump in the tank.
I'm producing approx 30 RWkW more so far. Final tune is on Wednesday.
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purple5ive
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Re:E85 Fuel to Caltex
Monday, May 16, 2011 3:57 AM
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wow 30kw from just using the new fuel and obviously tuning the ecu for it
best bang for buck mod lol
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MRTurbo
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Re:E85 Fuel to Caltex
Tuesday, May 17, 2011 1:53 AM
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Yes Caltex fuel is variable and that must be the reason why they don't call it 'E85' but 'E-Flex' as the ratio of ULP to Ethanol does vary. I don't think United servos sell E85 here in Adelaide but I should really find out.
The extra 30 kW would mainly come from the increased timing advance that higher octane would allow.
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
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purple5ive
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 2:18 AM
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was talking to one of my mechanic friends yesterday.
he was saying that leaving the E85 in the tank for a long time is not advisable unless the fuel lines etc have been changed to E85 compatible ones, this is a guy who owns a few hi powered wrxs and is helping tune a 300kw E85 fuelled rex. (which has all the fuel lines etc changed over) but i wonder if using the 80/20 mix will actually affect anything. he didnt seem to have an answer for that
he also said that shell sell a racing fuel which is 100ron and safer to use but costs a bit more
cheers
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MRTurbo
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 2:29 AM
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So where can you get it? - V-Power Racing (100 RON) has been phased out since July 2008.
What is the difference between Shell V-Power and Shell V-Power Racing?
Shell V-Power is a 98 octane fuel designed to improve the performance of many modern engines. This is aided by Shell V-Power’s Friction Modification Technology (FMT), which is formulated to reduce friction between the cylinder and piston rings, a critical area of the engine where lubrication is difficult to achieve. FMT is designed to help the engine turn more freely, and so help transfer energy from the fuel to the wheels more efficiently.
Shell V-Power Racing has the same engine cleaning properties as Shell V-Power but is formulated with 5% ethanol and is a 100 octane fuel.
1990 SW20 GT 3S-GTE Targa 2001 Honda CBR600F4i
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 3:05 AM
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There's an independent servo near Parramatta that sells 100RON fuel from the pump. I'm not sure where they get it from though (Shell, BP etc)
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purple5ive
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 3:53 AM
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i was told that theres a shell outlet in vic moorabin thats sells the shell racing fuel
not sure on other states
its all a hit and miss unless i go there and confirm it i cannot guarentee it.
i went to the places that supposedly sells e85 and they stopped getting it last year due to no supply from NSW which is where the victoarian guys get it from.
ive been told of another place to get E85 iil see if they have it or not.
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MuMan
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 5:09 AM
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"Have you ever noticed when things get set in motion, the heavy end wants to go first."
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WIDEMR
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Re:E85 Fuel to Caltex
Thursday, May 19, 2011 5:30 AM
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For a race car, buy E85 in a drum! Pump fuel will vary the ethanol content depending on market, weather ect also the other unleaded part will vary fron 91, 95, 98 ect From caltex: When Caltex retails the fuel, it will include between 70 and 85 per cent ethanol blended with regular petrol, depending on the time of year. All good drum E85 will be 85%ethanol and 15% 98 fuel mix Also a drum is sealed and will store for ages, servos it wont last long at all, its vented to the atmosphere, ethanol mixed fuel can absorb water from the atmosphere about 50 times more then normal non alcohol fuels, less then 1 tablespoon per gallon of water will spoil the fuel and start separation, as water will not blend with petroleum So i wouldn't leave it sit in the tank either, drain, fill with 98 ect, run the car for a little, then fill up with fresh E85 next track day. Few places around, for example race fuels in Melb you can bring your own drum and fill up with good race 'drum' E85, obviously cheaper then buying drums from places like vpw, rocket ect, saves cost of the drum, couriers ect.
post edited by WIDEMR - Thursday, May 19, 2011 5:34 AM
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