The defacto guide to tuning your car for e85.

**99GT2dr** · 07-02-2015

Damnit, you just said you don't even look at boost, now you notice a 4 psi change just from weather!?

**Frosty** · 07-02-2015

That's why I don't look at it ever!

**bandook** · 07-02-2015

Originally Posted by 99GT2dr

Damnit, you just said you don't even look at boost, now you notice a 4 psi change just from weather!?

Lol

**Reptile** · 07-05-2015

Everybody looks at boost....it's bragging rights, right?

**charlieRobinson** · 07-17-2015

ran a 13.3 wednesday night for a new PR. i am using 104 autolites with ~13psi

**chrsmi1** · 07-19-2015

Originally Posted by charlieRobinson

ran a 13.3 wednesday night for a new PR. i am using 104 autolites with ~13psi

You have an Xp cam, E85 and are running a 2.8 and only ran a 13.3? Driver mod? Post your slip if possible cause i'm wondering what your 60 ft was.
Maybe a good set of slicks can get you close to 12's.

**charlieRobinson** · 07-20-2015

Originally Posted by chrsmi1

You have an Xp cam, E85 and are running a 2.8 and only ran a 13.3? Driver mod? Post your slip if possible cause i'm wondering what your 60 ft was.
Maybe a good set of slicks can get you close to 12's.

I should probably update my sig that im driving a 4000 pound buick and not a GTP.. 60' was a 2.01

**charlieRobinson** · 08-17-2015

hey, guys. what kind of timing are you running in your cruise cells? anyone pushing higher than mid to high 40s?

**chrsmi1** · 08-18-2015

40 even for me in most cells. I get around 28-30 on 93 with that and 20-22 mpg on E85.

**charlieRobinson** · 08-23-2015

Originally Posted by chrsmi1

40 even for me in most cells. I get around 28-30 on 93 with that and 20-22 mpg on E85.

Dang. Im only getting 16MPG average with e85 and my mod list below in a buick riviera.

**chrsmi1** · 08-23-2015

Originally Posted by charlieRobinson

Dang. Im only getting 16MPG average with e85 and my mod list below in a buick riviera.

That's best case on the interstate. Around town only: 11. Maybe....

**GTP419** · 09-22-2015

Frosty, do you have the timing table you are using for your car? I would love to look at it.
I am new to e85 and am working on my tune.
I am starting with a 2005 Comp G timing table and seeing no kr so far.
My mileage was 300 to the first full tank.
I went the route of changing the injectors to the following. I may put them back and use your method.

45.84 46.33 46.94 47.95 48.17 48.22 48.22 48.34 48.44 48.51 48.78

L67 - 163k
1.9 modded rockers
90lb blue springs
Modded retainers
Gen 3 - H bar removed
3.2 Press on pulley
104 plugs gapped at .052
60lb Injectors
485 Walbro e85 fuel pump
Racetronix rewire
e85
SSIC - dual heat exchangers
Hogged out factory air box
PLOG
3" non catted downpipe
2.5" Magnaflow resonator
Stock cat-back w/04+ Mufflers
2.93 gears, shift kit
shifting at 6k

**Gutless** · 08-22-2015

Got a 97 F bird with a RWD l67, 4l60e. Car ran high 13's last year in bad (hot!) weather on 6PSI, corrected to a 13.50 FWIW.

S1X, headers, lightly ported heads, Gen III, 2.8" (12PSI), 15 degrees WOT, 47.5 lbs air/min 11,000 Hz, stock l67 MAF. Had it tuned for MN E10 gas. Its a RWD ECM with a 2 bar map and no 2 BAR upgrade for it so its scaled funny and looses some resolution.

Switched to E50 and used method 4 and a 1.11 scale factor. It was tuned on E10 so thats why i didnt go 1.12-3.

Runs good, starts great. Only problem is it falls out of closed loop (I think) during cruise. WOT AFR is 11.2-11.5. Car runs 14.5 afr on cruise sometimes but then falls into some wierd mode where the ECM adds 20% fueling and narrowband O2's go to .9-1.

I can email the HPT file, just wont allow attaching here.

Any thoughts?

**BoostedPontiac** · 01-19-2016

Id just like to mention that the cold start fix using tiny tuner works pretty well here at consistent -12 to 35 degree cold starts.

**charlieRobinson** · 01-31-2016

Hey e85 bros. What timing advance is everyone running in the ~2000 RPM highway cruise cells for best MPGs?

**chrsmi1** · 01-31-2016

I just checked my old E85 tune. 41.29 starting at 2000rpm in the Mg/Cylinder 200 through 360 cells. Goes to 36.29 around 4000 rpm.

**charlieRobinson** · 02-01-2016

Originally Posted by chrsmi1

I just checked my old E85 tune. 41.29 starting at 2000rpm in the Mg/Cylinder 200 through 360 cells. Goes to 36.29 around 4000 rpm.

Thanks. I am running as high as 47 in those cells. I had a low decline into WOT cells thinking i could squeeze some more MPGs out but I just changed that to a sharp decline to get in the sub 30s as fast as possible.

**BoostedPontiac** · 01-31-2016

I just used a 05 comp g good fuel timing table

**gtpsleeper** · 02-02-2016

There probably isnt that much difference in a couple * of timing at cruise. I played around and couldnt tell much of a difference once I got above 40. Because pump e85 is so inconsistent (and ****ty for that matter), I wouldn't think you see much difference at cruise. The difference is in the WOT and boost level. But my "opinion" is usually not welcomed on that particular matter when it comes to E85. but I digress...

Just make sure however high you go at cruise that its a smooth flow increasing and decreasing....