Blackpanther99

iTrader: (8)

Very good info. Like how it all gets put together and show very informative results.

LilJohn

Only issue with the calculations I see is the ideal methanol a/f ratio... In reality... maximum power potential on that fuel is more like 3.5... not 5.5.

Hows you calculations work out with that adjustment?

MIGHTYMOUSE

iTrader: (59)

you change the number on the spreadsheet to your favorite number. please refer to my 'assumption list' at post 1. (grain of salt from jan 2005)

target comes out to 10.0 leaving other assumptions the same.

going to add a multiplier in now to adjust the bsfc in accordance with total % methannol (will bring that a/f back up)

Sarg

iTrader: (6)

So I guess my question would be if using a wideband that reads lambda and multiplies to get a gas scale, what would you target? Since you were running best at 10.3 if that actual air fuel or what the wideband read after converting to lambda? Good stuff here. While I will not be using meth, it is interesting none the less and could have applications with varying blends of E85 as well since I have seen it vary from e68-e92!

tilly

iTrader: (5)

So the moral of the story after everything is all said and done and discussed is to keep you A/F around 10.5:1 +/- a couple of points while on the methanol

MIGHTYMOUSE

iTrader: (59)

well like sjh posted in here years ago. if you are reading lambda or reading the gasoline multiplier of lambda the number you 'look for' SHOULD stay the same.

however the actual ratio of the fuel blends is not that number being displayed.

and all that being said i was melting pistons at 11.5 and not at 10.3! (so in my head im wanting to believe there is more to it lol)

if anyone has taken a straight methanol car down the track staring at around 11.5 on a gas scale meter and been happy with the results i would love to hear it!

Sarg

iTrader: (6)

So I am guessing that was 10.3 on the gasoline scale?

MIGHTYMOUSE

iTrader: (59)

yes. that was my target afr for gasoline wideband on my t/a pump/race gas mix and methanol kit. for 1200ish hp

dmaxvaz

iTrader: (1)

How much boost was run and when was the methanol switched on? Compression ratio?

bRAZENLS2gOAt

iTrader: (20)

subbing for the info.

MIGHTYMOUSE

iTrader: (59)

8.3 (give or take) :1 compression around 26# boost, meth on full tilt starting at 4# boost

Slowhawk

iTrader: (12)

FYI- I run 2-15 nozzles. 100%meth and 93 octain. 9.8-1 compression. A/F at 11.3-1 or so.

No melted anything yet. Best- 8.4/ 166mph 1/4 ,Best 5.31 at 132mph 1/8.

So, that works for me.

Driftin_240sx

iTrader: (2)

So what you are saying is.. when your meth fails, you are really effed.

Slowhawk

iTrader: (12)

I'm saying if my fuel pump fails I'm screwed.

Safer if the meth fails, have safe guards for that.

Thanks for not knowing much.

SMOKNSS

iTrader: (3)

Pretty cool info. Subbed.

MIGHTYMOUSE

iTrader: (59)

slowhawk not sure what your angle is but if your engine is bigger 427>364, turbo is t6>t4 and car is lighter.. then heck yea you can run it leaner and / or less octane.

#carb intake#electric waterpump#nopowersteering#3 speed trans#carbon driveshaft#4" exhaust

so if you are saying after all that that your company shop race car is .05 quicker on pump gas/meth than my street car on pump/race/meth.. uhh.. congrats?

whole story > part of the story come on man we are all on the same team wth.

mike13

iTrader: (27)

David I'm curious what your afr's and timing curve looked like from 80-140kpa.

MIGHTYMOUSE

iTrader: (59)

this is only one calibration i found on my work computer from 2011

mike13

iTrader: (27)

Thanks, looking at the charts and how your car runs it looks like timing is more of a factor than the afr in going from 100-200kpa?

mike13

iTrader: (27)

Sorry pretty vague statement. I should say the timing is key in getting the car to spool to 200kpa quickly it looks like since your afrs are what people might consider to be on the rich side.