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ATS_Scott
Joined: 02 Mar 2007
Posts: 7
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 Posted: Fri Mar 02, 2007 2:26 pm Post subject: Toyota MR2 turbo 380RWHP on E85 |
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Howdy folks, just found this forum.
I took the plunge and "converted" my MR2 to run E85. My modifications consisted of replacing one leaking injector o-ring, and adding 30% to my fuel table, then refining the tune on our Dynojet. I also added 2 degrees advance in the higher load sites.
Link to current modifications to the car, and dyno graph on VP 104.
http://www.atsracing.net/scott91mr2.htm
I'm anxious to get back on the dyno and add some timing, but the clutch has finally decided 400 ft/lb of TQ is just too much.
Basically I'm getting an additional 60hp on fuel than costs about $.50 per gallon less than premium gasoline.
I need to figure out what the actual percentage of ethanol my local pump carries so I can adjust the tune as necessary. I don't think my Autronic SMC (ECU) has that capability with the appropriate sensors.
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Scott
http://www.atsracing.net
98 Tacoma
91 Toyota MR2 380rwhp on E85
05 YZ450F |
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illmatic
Joined: 21 Nov 2006
Posts: 11
Location: San Diego
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| Posted: Fri Mar 02, 2007 11:12 pm Post subject: |
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| nice #'s and car. |
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Fredster
Joined: 20 Nov 2006
Posts: 111
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| Posted: Mon Mar 05, 2007 3:23 pm Post subject: |
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wow same here
is mr2 engine all steel ?
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I guess Hubert Reeves thinks this is an important matter
Cost of Can. Gov. studies on global warming ? xx M$
Cost of industrial scientific studies for alternative energy sources ? x M$
Cost of a 100$ batch of distilled ethanol ?
Priceless |
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ATS_Scott
Joined: 02 Mar 2007
Posts: 7
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stylin99
Joined: 08 Sep 2006
Posts: 85
Location: Charlotte, NC
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| Posted: Wed Mar 07, 2007 4:41 pm Post subject: |
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To determine actual percentage of alcohol, you can buy $20 worth of equipment and test it yourself in 15 minutes. I loosely followed the guide on page 30 (appendix D) of this document below, that is supposed to be the standard for checking fuel stations.
In 15 minutes I knew I had 30% alcohol meaning I had winter blend.
http://www.eere.energy.gov/afdc/pdfs/40243.pdf
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'99 Mustang GT, Vortech Supercharged, now running E85 full time.
www.e85mustangs.com
Best Quarter Mile on E85:
10.52 at 135 mph |
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1outlaw
Joined: 15 Feb 2006
Posts: 89
Location: Central Wisconsin
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| Posted: Wed Mar 07, 2007 8:55 pm Post subject: |
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| stylin99 wrote: | To determine actual percentage of alcohol, you can buy $20 worth of equipment and test it yourself in 15 minutes. I loosely followed the guide on page 30 (appendix D) of this document below, that is supposed to be the standard for checking fuel stations.
In 15 minutes I knew I had 30% alcohol meaning I had winter blend.
http://www.eere.energy.gov/afdc/pdfs/40243.pdf |
Stylin- I think you meant to say 30% gasoline  |
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ATS_Scott
Joined: 02 Mar 2007
Posts: 7
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| Posted: Wed Mar 07, 2007 10:26 pm Post subject: |
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| stylin99 wrote: | To determine actual percentage of alcohol, you can buy $20 worth of equipment and test it yourself in 15 minutes. I loosely followed the guide on page 30 (appendix D) of this document below, that is supposed to be the standard for checking fuel stations.
In 15 minutes I knew I had 30% alcohol meaning I had winter blend.
http://www.eere.energy.gov/afdc/pdfs/40243.pdf |
Thanks Stylin,
I had not seen that yet. I'll give it a try.
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Scott
http://www.atsracing.net
98 Tacoma
91 Toyota MR2 380rwhp on E85
05 YZ450F |
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te51levin
Joined: 12 Sep 2006
Posts: 22
Location: PNW
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| Posted: Fri Mar 09, 2007 12:29 am Post subject: |
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Excellent, another MR2. My little '85 seems very happy on E34, but I've just purchased some larger injectors to support E85, assuming the fuel pump keeps up and the hoses don't rot.
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'85 AW11 7A-GE MSnS-E (11.3:1 daily driver, now on E85)
'77 TE51 2T-G (finally running again!) |
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ATS_Scott
Joined: 02 Mar 2007
Posts: 7
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| Posted: Fri Mar 09, 2007 11:45 am Post subject: |
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Ohh a 7age! How do you like it? What pistons did you use. Are you on MR2OC.com? Keep us updated on upgrading to e85. What kind of timing advance are you able to run on e34? Also if you don't mind let me know what timing you end up with on e85. I don't deal much with Normally aspirated high compression engines but I want to learn.
We're building a local customers MK1 SCCA car. With 4age currently @ stock compression & bore, running carbs and an electromotive ignition system. He's wanting to up compression and get the head ported. Not sure what class he's planning on running though. Hmmm why shouldn't I recommend he run e85.... 
Scott
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Scott
http://www.atsracing.net
98 Tacoma
91 Toyota MR2 380rwhp on E85
05 YZ450F |
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te51levin
Joined: 12 Sep 2006
Posts: 22
Location: PNW
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| Posted: Fri Mar 09, 2007 12:58 pm Post subject: |
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| ATS_Scott wrote: | Ohh a 7age! How do you like it? What pistons did you use. Are you on MR2OC.com? Keep us updated on upgrading to e85. What kind of timing advance are you able to run on e34? Also if you don't mind let me know what timing you end up with on e85. I don't deal much with Normally aspirated high compression engines but I want to learn.
We're building a local customers MK1 SCCA car. With 4age currently @ stock compression & bore, running carbs and an electromotive ignition system. He's wanting to up compression and get the head ported. Not sure what class he's planning on running though. Hmmm why shouldn't I recommend he run e85....
Scott |
Actually I like it quite a lot. Once you sort out the little obstacles it's an easy combination to build, uses all US-market parts, and runs like stink. I used late bigport pistons with a 20mm wristpin to match the 7A rods. The pistons come from a 9.4:1 engine, but with the increased displacement and additional machine work I got a lot more. If I'd have known I'd be able to buy 104-octane fuel right at the pump I could have used smallport pistons (rated 10.3:1) and had 12.5:1. That'd get the job done. I have a page at http://te51levin.superjamie.net/ if you want to see how it went together. There's also a page there with the results of the basic tuning I've done, though it hasn't been updated in a long time...I haven't actually done any tuning in a long time!
With bigger injectors (295cc vs. 210cc) the stock ECU handled fuelling just fine (on gasoline), but it had way too much part throttle advance for that CR. That's the real benefit of ethanol for me. I think full throttle advance is about the same, but I am able to use much more advance at part throttle and cruise. I don't actually know what total advance the stock ECU provides, and I need to get rid of a high-speed/high-load hesitation in the MegaSquirt before I can really tune the WOT timing. I've turned it up as far as 36 degrees before and not heard detonation. There's a knock sensor on the block but I have not yet invested in the filtering circuit to allow MS to listen to it.
If your customer's class allows high compression, a set of Wiseco pistons will bump it up nicely...I'm just still not certain about materials compatibility, but otherwise, should be good to go.
_________________
'85 AW11 7A-GE MSnS-E (11.3:1 daily driver, now on E85)
'77 TE51 2T-G (finally running again!) |
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