E85 Conversion - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 11-23-2010, 08:55 PM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default E85 Conversion

I have been searching the forums and can not find a e-85 conversion thread.
I am running 550cc injectors and Hydra EMS is this possible with current parts and what do I need to do to convert this? Or if anyone can direct me with a link to an E-85 conversion thread. Thanks.
mach5 is offline   Reply With Quote
Old 11-23-2010, 09:12 PM   #2
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,186
Total Cats: 2,583
Default

Unless you plan to keep boost at ridiculously low levels (like less than 10) those 550's won't cut it. Neither will the stock fuel pump.
I'm hitting 70% duty cycles on 1000's at 17psi
18psi is offline   Reply With Quote
Old 11-23-2010, 09:14 PM   #3
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default

So what fuel pump and injectors like 1000? and what fuel pump?
mach5 is offline   Reply With Quote
Old 11-23-2010, 09:20 PM   #4
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,186
Total Cats: 2,583
Default

wally 255 HP

I think DW just released a 300.
I'd get that if I was looking for one right now.
18psi is offline   Reply With Quote
Old 11-23-2010, 09:23 PM   #5
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default

thats it 1000cc's, DW 300 and some changes to the hydra map? What kinda power can I get @ 10psi on the 550's I have? Also what needs to be done in changing the ECU? Just AFR Fuel map?
mach5 is offline   Reply With Quote
Old 11-23-2010, 09:31 PM   #6
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,186
Total Cats: 2,583
Default

Quote:
Originally Posted by mach5 View Post
thats it 1000cc's, DW 300 and some changes to the hydra map? What kinda power can I get @ 10psi on the 550's I have? Also what needs to be done in changing the ECU? Just AFR Fuel map?
No idea on power cause I don't think anyone runs 550's with e85. Its just worthless.

The whole tune will have to be redone including priming/cranking/warmup/fuel map/etc. Then to fully take advantage of the octane rating the spark map needs to be redone.

So basically everything about the tune will need to be redone.

Its a good idea to also bump up base fuel pressure with a afpr but the stocker will handle it if not (though barely).

Search. Its been discussed at least a few times already.
18psi is offline   Reply With Quote
Old 11-23-2010, 09:36 PM   #7
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default

I could probably just get a MSII and get a base map from someone and install that with the new injectors and fuel pump then take it in for further tuning.
mach5 is offline   Reply With Quote
Old 11-28-2010, 12:56 AM   #8
Newb
 
Join Date: Nov 2010
Posts: 21
Total Cats: 0
Default i've reshearch e85 for years

you need to calculate at least 40% more fuel is needed. 91 octane has 120,000 BTU's where as e85 has 76,000 BTU's. less thermal engergy. but it burns cooler. e85 works very well for higher compression...or BOOST!!!! i feel

when i ran it in my evo 8. i used a double pumper (twin walbro 255lbh) and 1200cc min injectors.

it wasn't all nesscary, i have seen people use just the 1000cc injectors, a single walbro 255lbh and a good (really good) tune. but overkill is the name of the game for me.... you can usally up the boost for more horsies or up the compression for quicker spool or bigger turbo. with higher compression you'll have for a much higher margin of error for tuning

Last edited by 91whitelemon; 11-28-2010 at 01:11 AM.
91whitelemon is offline   Reply With Quote
Old 11-28-2010, 03:50 AM   #9
Junior Member
iTrader: (8)
 
Join Date: Jul 2008
Location: Portland, OR
Posts: 397
Total Cats: 9
Default

It's just ballpark because dyno numbers differ due to setup, type correction factor etc
550s would probably get you in the neighborhood of 275hp, you could get a little more by upping the fuel pressure but some injectors(RC) don't like this
Given your turbo is a gt2871 it makes no sense to stay with 550s and e85. I would get 800s at least preferably 1000s
A fuel pump would be necessary. The hydra would be fine you would just need to get it retuned
kaisersoze is offline   Reply With Quote
Old 11-30-2010, 06:09 AM   #10
I'm Miserable!
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

im running DW 1000cc with a walbro 255 at 20psi with stock fuel regulator.
Nothing special is needed for the conversion other then a GOOD tune. Also change out your fuel filter after running a full tank of e85
railz is offline   Reply With Quote
Old 11-30-2010, 01:42 PM   #11
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default

how fast does everyone go threw fuel with this set up? Fuel Milage?
mach5 is offline   Reply With Quote
Old 11-30-2010, 01:44 PM   #12
I'm Miserable!
iTrader: (33)
 
Join Date: Jan 2009
Location: San Jose, CA
Posts: 1,066
Total Cats: -3
Default

gas milage during normal driving isnt that different but you'll notice your gas disappear in seconds once you hit boost..:(
railz is offline   Reply With Quote
Old 11-30-2010, 01:55 PM   #13
Junior Member
Thread Starter
 
Join Date: Apr 2009
Location: Saint Louis
Posts: 76
Total Cats: 1
Default

thinking I might scrap whole set up and just go V8 thinking 302 5.0 looks the easiest. If so I will be selling my entire set up.
mach5 is offline   Reply With Quote
Old 11-30-2010, 02:01 PM   #14
Senior Member
iTrader: (2)
 
Join Date: Jan 2010
Location: Denver
Posts: 909
Total Cats: 14
Default

I don't have a miata engine, but I do run e85. The key to success is to make sure your fuel system is up to the challenge of supplying the extra fuel needed. After that just like any fuel you will need a good tune.

I personally like overkill (over build). I run a single gravity feed bosch 044 fed by -8 line, then - 8 to an oversize fuel rail feeding ID 1000's, fuel is regulated by a rising rate weldon fpr, then return to the tank via -6. Base fp is 68 pounds. This set up will support 600 hp, I dynoed at 485, plenty of room left. Having a good safety net takes away the worries when boosting, IMO.
hingstonwm is offline   Reply With Quote
Old 11-30-2010, 06:25 PM   #15
Junior Member
iTrader: (1)
 
Join Date: Aug 2007
Posts: 387
Total Cats: 10
Default

at part throttle. mpg is 10% less.
at wot, mpg is 30% less.

E85 lowers EGT by 200F.

E85 gave me ~8-10% more power. Shawn Church tuned it. before on 100 race gas. then drain gas, change something on the map. put in E85, 8-10% more power.

this is on my 99 Miata. didn't change a thing on fuel system, other than fuel filter after 100 miles. I was on 550cc.

trick with E85 is cold start up. when someone told me to add more fuel for cold start up, thought they meant 20% more. No, they meant 200% more. it starts right up.

to me, best thing about E85 is the smell. my nose have allergy. with sweet smelling alcohol, I enjoy my car's exhaust.
bellwilliam is offline   Reply With Quote
Old 11-30-2010, 09:26 PM   #16
Newb
 
Join Date: Nov 2010
Posts: 21
Total Cats: 0
Default

.[/QUOTE]
trick with E85 is cold start up. when someone told me to add more fuel for cold start up, thought they meant 20% more. No, they meant 200% more. it starts right up.

to me, best thing about E85 is the smell. my nose have allergy. with sweet smelling alcohol, I enjoy my car's exhaust.[/QUOTE]


lol that is so true...could also keep a can on starting fluid on tap....when i had my evo the winter was so bad on start up...i used a 70/30 in winter
91whitelemon is offline   Reply With Quote
Old 11-30-2010, 09:29 PM   #17
Newb
 
Join Date: Nov 2010
Posts: 21
Total Cats: 0
Default

Quote:
Originally Posted by hingstonwm View Post
i don't have a miata engine, but i do run e85. The key to success is to make sure your fuel system is up to the challenge of supplying the extra fuel needed. After that just like any fuel you will need a good tune.

I personally like overkill (over build). I run a single gravity feed bosch 044 fed by -8 line, then - 8 to an oversize fuel rail feeding id 1000's, fuel is regulated by a rising rate weldon fpr, then return to the tank via -6. Base fp is 68 pounds. This set up will support 600 hp, i dynoed at 485, plenty of room left. Having a good safety net takes away the worries when boosting, imo.

+1
91whitelemon is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM
1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85) Lincoln Logs Dynos and timesheets 4 09-23-2015 01:26 PM
Upgrade my MSM coilovers springs or KW ? elior77 Suspension, Brakes, Drivetrain 14 09-17-2015 10:20 PM
1991 Turbo Miata partout tottestad Miata parts for sale/trade 18 09-14-2015 08:52 PM
Is E-85 worth it N/A? Stealth97 ECUs and Tuning 22 08-31-2015 05:38 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:11 PM.