This is a 1999 Camaro SS M6 with 4.10 gears. Bolt ons only. No cam, heads, built bottom end etc. 100% stock internal motor. The car was tuned on E85 and 93 back 2 back.

Mods:
FAST 4150 TB
Edelbrock Vic Junior intake
1 3/4 Long tubes
TSP true dual exhaust
UDP

These are the results. E85 is red, 93 is blue on the graph.



E85 didnt make a huge difference N/A but the car is setup for the kit so it will play a big factor then.

E85 took 26 degrees to make peak power
93 took 29.5 degrees

 

Those are some pretty high numbers for stock h/c, the vic jr/4150 must be helping alot.

Was the AFR really tuned for a target of 8-9afr for E85 on a gas scaled wideband?

Interesting it took less timing, atleast there were gains of 5-8 across the board.

 

What kind of gains are there to be had running e85+nitrous vs 93+nitrous on a 150 shot?

 

I dont know a whole lot about the AFR when it comes to E85. Im still trying to learn as much as I can about it. So basically, I dont know lol.

Running N2O with E85 should provide an increase in power because of the increased octane rating of the fuel which will allow for more timing on the kit. Exactly how much? I dont know. It would vary from setup to setup.

 

That is nice. Have you been to the track yet? Curious on mph because I have an elbow setup currently untuned and looking to go to a 4150 tb on it.

 

that's about a 2% increase with e85; i've read it could be as much as 5%...of course depending on setup.

I think it's really cool you shared this! I've been wanting to convert over to e85, but here where i live i only know of one place that sells it about 10 miles away from where i live.

 

props for sharing and trying!! I've thought about trying it on my ls6.

 

No times at the track yet. Its still at the dyno shop getting some drivability tuning. I will keep y'all updated on the track times.
There isn't a huge difference N/A. I'm more interested to see what it does on the kit with the E85.

 

I would like to see results from 93+spray vs e85+spray. Ive searched everywhere but dont seem to find much.

 

I'm curious to know what size injectors you are running and are you on a stock fuel pump? I want to run e85 also with my Bolton car and maybe spray alittle

 

Im running 60lb injectors which is kinda over kill but I got a good deal on them.

Im running a racetronix fuel pump with a hotwire kit.

 

I have ran E85 with a 255 pump and stock 26# injectors when i was boltons. They were just enough to go static and keep the AFR around 13:1(gas), If you have the 28# 01+ injectors they will be perfect for boltons. I picked up around 10whp and made peak power at 26-27*

 

I have ran e85 on a lot of engines, not on a ls yet. But i don't think you have tuned the full potential of the e85 yet. You have to remember on that dyno the a/f reading is on a gas scale.

for example the motors i typically tune make peak power on gas at 13.1:1 and e85 peak power on a gas scale is 12.7:1.

On your dyno runs the gas tune is about right at 12:1 a/f. however the guy tuned it at 9:1 on e85. That is stupid rich and you will gain a lot more power leaning it out.

I'm not the best at explaining this, but your o2 sensor is reading on a gas scale where 14.7:1 is stoich, this is a calculated number. The tuner probably read what the best power is on e85 and saw its stoich is around 9:1 but that is also a calculated number. You should tell him to tune it on a lambda scale or at least try leaning it out and see if it picks up power.

if you need any help with this let me know as i have a spreadsheet that shows the different o2 reading voltages and a/f readings based on lambda.

 

U guys think I will be ok with a stock pump and just bigger injectors? Something like #42's or bigger?

 

Bump for an answer?

 

How much more timing are you guys runing then stock on e85? 4-5 degrees?

 

26-27* is where I have made the most power on the 3 stock internal setups I have done

 

Since widebands read lambda and not true AFR by fuel, unless you changed the dynojet's calibration for the WB (unlikely) your E85 tune is ******* stupid rich, which also correlates with it not taking timing (it should take MUCH more timing then gas)

 

K thanks

 

Bumpin this old thread for track times on this car.