1SIKSS 711rwhp/607ftlb
#1
12 Second Club
Thread Starter
iTrader: (14)
Join Date: Oct 2008
Location: Where The Money Is
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
1SIKSS 711rwhp/607ftlb
2011 2SS LS3 Synergy Green Camaro
Mods:
Whipple 2.9L 3.875 Pulley
Custom Cam By Geoff Skinner@EPS
Kooks Full Exhaust
GMM Ripshift Shifter
Cold Air Inductions Intake
Pfadt Racing Stage Three Suspension
Mcloed RXT twin disc clutch with billett flywheel
Dyno Numbers Pre Blower
463RWHP/423FTLBTQ
Dyno Numbers After Blower
655RWHP/578FTLBTQ
Tuned By Tracy@Cincy Speed
A/F 11.4
http://www.youtube.com/watch?v=2fmFE...e_gdata_player
Alky Control 100% methanol
711rwhp/607ftlb
21degrees timing
A/F 11.04
injectionhttp://www.youtube.com/watch?v=wQ0re6E_KRk&feature=youtube_gdata_player
Mods:
Whipple 2.9L 3.875 Pulley
Custom Cam By Geoff Skinner@EPS
Kooks Full Exhaust
GMM Ripshift Shifter
Cold Air Inductions Intake
Pfadt Racing Stage Three Suspension
Mcloed RXT twin disc clutch with billett flywheel
Dyno Numbers Pre Blower
463RWHP/423FTLBTQ
Dyno Numbers After Blower
655RWHP/578FTLBTQ
Tuned By Tracy@Cincy Speed
A/F 11.4
http://www.youtube.com/watch?v=2fmFE...e_gdata_player
Alky Control 100% methanol
711rwhp/607ftlb
21degrees timing
A/F 11.04
injectionhttp://www.youtube.com/watch?v=wQ0re6E_KRk&feature=youtube_gdata_player
Last edited by Martin718; 06-23-2011 at 03:13 PM.
#5
Trending Topics
#15
10 Second Club
iTrader: (18)
Seeing as the wideband is going to read lambda, and not individual AFR between the two fuels, unless you're tuning by EGT it's all a big damned guess anyway, and the actual reading will change depending on the ratio of water/meth, pure meth, and total amount of meth that is being sprayed relative to what is being supported by your fuel system. That said, if he's only spraying enough meth to drop the AFR from 11.4 to 11.04, the car's still running rich. Call it "safe" if you'd like, but it's running excessively rich regardless.
Last edited by DietCoke; 07-14-2011 at 03:27 AM.
#16
12 Second Club
Thread Starter
iTrader: (14)
Join Date: Oct 2008
Location: Where The Money Is
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
The meth is 100% as stated no mixture, it is being used a a fuel replacement i.e. We pull fuel and replace with meth there for the a/f is different than it would be if it were straight gas. The alky is a standalone and has nothing to do with the cars fuel system. Run one m15 nozzle. How would it not read the a/f between the two fuels? It pics up the reading after the point of burn from the two
#18
10 Second Club
iTrader: (18)
The meth is 100% as stated no mixture, it is being used a a fuel replacement i.e. We pull fuel and replace with meth there for the a/f is different than it would be if it were straight gas. The alky is a standalone and has nothing to do with the cars fuel system. Run one m15 nozzle. How would it not read the a/f between the two fuels? It pics up the reading after the point of burn from the two
Let me try to simplify it. The air/fuel sensor in the dyno reads lambda, or just a basic coefficient of any given number (in most cases, 14.7:1 for gasoline). It will read parts fuel per part air, period. It doesn't care if those parts are gasoline, methanol, alcohol, brake parts cleaner, or kool-aid, because it's basically just an air particle reader/counter.
Now that being said, if you compare the stoich AFR of the two different fuels, you can obviously see that you need a lot more methanol to burn then you would fuel.
14.7:1 gasoline
~6.3:1 methanol
If you were comparing a partial meth burn to a gasoline-only burn, the two resulting AFR ratios wouldn't mean much of anything compared to each other, because at the same 'reported' AFR, the methanol burn is actually much leaner because the fuel has a much lower stoich coefficient. Again, this is a result of lambda value being set for gasoline stoich for both runs (this is just a read-out and not wholly important)
If you're pulling fuel and adding meth to replace it, 11:1 based on a 14.7:1 readout sounds pretty close, as it is much leaner in reality then 11:1 on gasoline due to the stoich coefficient of methanol, which would make more sense. You didn't specify and I assumed you were just adding meth and timing, instead of reworking the entire tune.
Last edited by DietCoke; 07-14-2011 at 08:14 AM.
#20
12 Second Club
Thread Starter
iTrader: (14)
Join Date: Oct 2008
Location: Where The Money Is
Posts: 187
Likes: 0
Received 0 Likes
on
0 Posts
It was specified clearly in the very first post were it says 100%meth injection. Obviously you haven't dealt with the alky controls setup or you would have been a little more informend. It doesn't matter to me just think maybe you shoulda asked more about the setup if it was a question instead of *** U MEing