Meth vs e85 mix

aflatau · 04-16-2012, 03:36 AM

Question:

I have a JB4 - and was wondering if I would be better off running a meth setup or keep on running a 93/e85 mix and do some upgrades to the jb4 such as the 15ohm mod and the JB4 CPS / SLD alpha and doing some tweeking with that?

The reason I ask this is because last night I did some runs today with a friend of mine, so I can compare two different maps. Map 2 and Map 7.

We were doing a 40 roll - and in map 2 I would pull him each time a car or two by the mid of forth gear. But in map 7 he would pull me every time. I am not to sure how this can be since I should be running more boost on map 7 then map 2 right?

Map 2: 14.5psi
Map 7: 17psi

Race was from a 40 roll at 2nd car.
Running a 50/50 93/e85 mix
Mods: JB4, 3" c*tless downpipes, drop in k&n air filter

Kuch335 · 04-16-2012, 05:18 AM

Both

and i believe 15ohm mod is only useful if you are running the meth.. 93/e85 mix probably not equivilent to the 100oct 'race gas' that Map 7 needs so I would guess you're probably not hitting those boost levels.

imageautodetail · 04-16-2012, 06:57 AM

were you letting the JB4/car adapt to each new map setting?

enrita · 04-16-2012, 07:21 AM

just run 93 octane and meth 70/30 mix with a cm10 nozzle . I would run though map 3 with additive and safety.

aflatau · 04-16-2012, 11:43 AM

Quote:

Originally Posted by imageautodetail

were you letting the JB4/car adapt to each new map setting?

The only map that needs to 'adapt' is map 5.

The logs I have prove that I was hitting the right boost levels.

Jeff@TopGearSolutions · 04-16-2012, 11:55 AM

Actually every map on the Jb4 would need to adapt for ignition purposes.

More boost isnt always more power, especially if you are knocking and your ignition is dropping heavily.

You should be logging your runs when changing maps to see if they are benefiting you or not. Pay close attention to your ignition values and if they are decreasing with -3 increments that means you are knocking and the tune is too aggressive.

You also need to pay attention to intake air temps and any boost oscillation.

04-16-2012, 03:36 AM	#1
aflatau First Lieutenant 65 Rep 340 Posts Drives: XM Join Date: Mar 2012 Location: Buffalo, NY iTrader: (1)	Meth vs e85 mix Question: I have a JB4 - and was wondering if I would be better off running a meth setup or keep on running a 93/e85 mix and do some upgrades to the jb4 such as the 15ohm mod and the JB4 CPS / SLD alpha and doing some tweeking with that? The reason I ask this is because last night I did some runs today with a friend of mine, so I can compare two different maps. Map 2 and Map 7. We were doing a 40 roll - and in map 2 I would pull him each time a car or two by the mid of forth gear. But in map 7 he would pull me every time. I am not to sure how this can be since I should be running more boost on map 7 then map 2 right? Map 2: 14.5psi Map 7: 17psi Race was from a 40 roll at 2nd car. Running a 50/50 93/e85 mix Mods: JB4, 3" c*tless downpipes, drop in k&n air filter __________________ 24 XM(Current) 22 X540i(Sold) 21 M5 Comp(Sold) 07 Single Turbo 335i(one of the first, sold)
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04-16-2012, 05:18 AM	#2
Kuch335 2007 335i E92 45 Rep 624 Posts Drives: 2007 E92 TiAg, 2011 X3 35i Join Date: Mar 2011 Location: OH iTrader: (4)	Both and i believe 15ohm mod is only useful if you are running the meth.. 93/e85 mix probably not equivilent to the 100oct 'race gas' that Map 7 needs so I would guess you're probably not hitting those boost levels. __________________ 2007 335i E92 AT - MHD E85 Flash, xHP Stage 3 , MR5 Intake, VRSF DPs, VRSF 7in FMIC, ER CP, Fuel-It Stage 1, RB PCV, UUC Corsa Exhaust, BL R8 Coils, Sachs SRE Coilovers, M3 Control Arms, H&R Sway, BA Diff Lock, MDF Scoops, Tint, CF Hood, Mini Battery :: 2011 X3 xDrive 35i - MHD Stage 1, Alum Charge Pipe
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04-16-2012, 06:57 AM	#3
imageautodetail Captain 48 Rep 799 Posts Drives: 08 335 silverback Join Date: Nov 2010 Location: lou EVIL kentucky iTrader: (12) Garage List 2008 335 e90 [0.00] 2007 e90 335 [5.00]	were you letting the JB4/car adapt to each new map setting? __________________ FBO...METH...BIG TWINS
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04-16-2012, 07:21 AM	#4
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	just run 93 octane and meth 70/30 mix with a cm10 nozzle . I would run though map 3 with additive and safety. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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04-16-2012, 11:55 AM	#6
Jeff@TopGearSolutions 3474 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Actually every map on the Jb4 would need to adapt for ignition purposes. More boost isnt always more power, especially if you are knocking and your ignition is dropping heavily. You should be logging your runs when changing maps to see if they are benefiting you or not. Pay close attention to your ignition values and if they are decreasing with -3 increments that means you are knocking and the tune is too aggressive. You also need to pay attention to intake air temps and any boost oscillation.
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