SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

[Cfdproductions]

Very interesting thread. I'm going to read through it even if it seems a little more informative for the MT! This is my late October run with only the jb4 and catless dp. 100-200 run which is (62-124)


I should probably get a JesseDaBears tune, I feel a lot of turbo surge...

Need to get one without that -2 slope to really get a good idea what it’s doing sadly

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[ColonelAdama]

Very interesting thread. I'm going to read through it even if it seems a little more informative for the MT! This is my late October run with only the jb4 and catless dp. 100-200 run which is (62-124)


I should probably get a JesseDaBears tune, I feel a lot of turbo surge...

Send me a PM if you want to get the stuttering worked out. Can take a few revisions on MTs. Solid time though!

 

[djf]

How safe/consistent is blending ethanol yourself for map 2 & 4 without using a flex fuel kit? I plan to go PI/visconti reflex in the near future but I would like to run some ethanol in the interim with the jb4 I already have. I don’t think a flex fuel kit would be worth it since at a minimum I’d have to upgrade the harness to move to PI/reflex

 

[ColonelAdama]

@djf

It's fine. Stick to E25 without FP upgrade (roughly 1:4), E40 with FP upgrade (roughly 1:2 at FOL 60)

Use a calculator like this: https://morepowertuning.com/pages/e...5WDpxATypuYsMgHN23Ev7lNVH9XvQcZEH6MA8_yhLJyIn

and verify your trims stay under 45.

 

[djf]

@djf

It's fine. Stick to E25 without FP upgrade (roughly 1:4), E40 with FP upgrade (roughly 1:2 at FOL 60)

Use a calculator like this: https://morepowertuning.com/pages/e...5WDpxATypuYsMgHN23Ev7lNVH9XvQcZEH6MA8_yhLJyIn

and verify your trims stay under 45.

Is the variance in e content from pump e85 enough to warrant any concern?

 

[ColonelAdama]

Is the variance in e content from pump e85 enough to warrant any concern?

eh not really just keep an eye on trims and timing to keep it dialed in

 

[“I’m keeping this stock”]

Has anyone swapped out their board for this fuel pressure upgrade board? What are the advantages? I have a MT so I’m wondering if it’s worth it. https://burgertuning.com/collection...ts/s58-and-b58_gen2_fuel_pressure_upgrade_kit

 

[Cfdproductions]

Has anyone swapped out their board for this fuel pressure upgrade board? What are the advantages? I have a MT so I’m wondering if it’s worth it. https://burgertuning.com/collection...ts/s58-and-b58_gen2_fuel_pressure_upgrade_kit

Me and the colonel have and it’s the best thing you can do

 

[letsrollmike]

Has anyone swapped out their board for this fuel pressure upgrade board? What are the advantages? I have a MT so I’m wondering if it’s worth it. https://burgertuning.com/collection...ts/s58-and-b58_gen2_fuel_pressure_upgrade_kit

just did mine today but I’m only running map2 on 91 Oct right now. I want to throw E-85 mix in and run maybe map 4 or 5 but not sure if I need to actually get the custom tune first. Anyone know what safe octane/mix to run on the built in JB4 maps with the FP upgrade?

 

[Cfdproductions]

just did mine today but I’m only running map2 on 91 Oct right now. I want to throw E-85 mix in and run maybe map 4 or 5 but not sure if I need to actually get the custom tune first. Anyone know what safe octane/mix to run on the built in JB4 maps with the FP upgrade?

30-40

 

[letsrollmike]

So just mix 40 right in and hit map 5? It says 26 psi which I thought stock turbo gasses out at like 24/25. Could be wrong.

 

[ColonelAdama]

So just mix 40 right in and hit map 5? It says 26 psi which I thought stock turbo gasses out at like 24/25. Could be wrong.

It will target 26psi but really it runs more like 24-25. You can start on map 4 with anywhere E30-40 with FOL at 60. If it all looks good you can try map 5

 

[letsrollmike]

Ok i put E-40 which is probably a little less due to having some 91 in it already. I got it down to just 1 bar of fuel and put 4 gal E-85, 6 Gal 91 oct.

This is my map 4 log. It isnt liking something. Its pulling boost and then getting back on it over and over without me lifting the pedal. This is 2 runs of a 3rd gear 2k RPM log.

 

[“I’m keeping this stock”]

Me and the colonel have and it’s the best thing you can do

i’m only really comfortable running map 1 here in hawaii (low quality 92 and no e85), would you say it’s worth it?

 

[FLtrackdays]

i’m only really comfortable running map 1 here in hawaii (low quality 92 and no e85), would you say it’s worth it?

You’ve got to live to your name and keep er stock ?

Ok i put E-40 which is probably a little less due to having some 91 in it already. I got it down to just 1 bar of fuel and put 4 gal E-85, 6 Gal 91 oct.

This is my map 4 log. It isnt liking something. Its pulling boost and then getting back on it over and over without me lifting the pedal. This is 2 runs of a 3rd gear 2k RPM log.

From the looks of your car, I’d say she‘s running a bit hot ? But I’m no Colonel either. I wouldn’t even make rank of private nor pass JB4 boot camp.

That’s all. I’ll go back to lurking & ?. Carry on ?

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