SUPRA ULTIMATE B58 JB4 GUIDE AND LOG REVIEW (V1)

[ColonelAdama]

Totally lost on how to do this. Is it somewhere in this thread? I’ve actually skimmed through all 60+ pages.

Under advanced, firmware, platform 158 on the app

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[BayeauxSupra]

looks pretty good, I recommend updating to V28+ firmware, but this is a good E blend for map 2. You will need a bit more ethanol to run anything higher

 

[BayeauxSupra]

7.97 on just a jb4 would be crazy … can you find that info ?

Start at 3:20

Actually ran a 7.94 60-130

Goals!!

 

[BayeauxSupra]

looks pretty good, I recommend updating to V28+ firmware, but this is a good E blend for map 2. You will need a bit more ethanol to run anything higher

I’m willing to crank it up to another map and more E but like you mentioned I would need that FP I assume first.
Down the ??️ we go?

 

[Got_M]

Start at 3:20

Actually ran a 7.94 60-130

Goals!!

If you run a 7.xx on a JB4 I will be absolutely shocked. I think the guy that posted that video two years ago was full of shit tbh.

You have fp upgrade?

 

[BayeauxSupra]

If you run a 7.xx on a JB4 I will be absolutely shocked. I think the guy that posted that video two years ago was full of shit tbh.

You have fp upgrade?

I would be shocked as well. No don’t have the FP upgrade. I guess that’s the next order of business.

I’m just watching and learning to see how far this JB4 can go.

 

[ColonelAdama]

I would be shocked as well. No don’t have the FP upgrade. I guess that’s the next order of business.

I’m just watching and learning to see how far this JB4 can go.

Mid 8s at best with the fp upgrade and E40

You can run a bit more E, just watch trims and try to keep under 45.

something like this would be an appropriate map 6 for no fp-upgrade.

map6_15	map6_20	map6_25	map6_30	map6_35	map6_40	map6_45	map6_50	map6_55	map6_60	map6_65	map6_70
1.5​	2​	2.5​	3​	4​	4.5​	5​	5.5​	5.5​	5​	4.5​	4​

 

[bushido]

Start at 3:20

Actually ran a 7.94 60-130

Goals!!

simply not possible. he's cropping the screenshot, which is sus enough. easy to BS and ragebait on the internet lol

and if an experienced jb4 tuner is saying the best one can do is mid 8s, trust him, not the clout

 

[ColonelAdama]

simply not possible. he's cropping the screenshot, which is sus enough. easy to BS and ragebait on the internet lol

and if an experienced jb4 tuner is saying the best one can do is mid 8s, trust him, not the clout

Yep and @Got_M can confirm MHD OTS E40 did ~8.7 right? Pretty impressive for the jb4 to match that in some cars.

Now JB4 + MHD backend flash on E50+meth in mid 7s lol

I've got one customer hitting low 8s on JB4+E45 but its thrown a couple codes here and there (his map)

so I don't push it quite that hard

 

[DVMKV]

I was only able to do a 8.35 with JB4+p800+JB4-PI on e+91. A half second faster is a good bit faster yet.

 

[BayeauxSupra]

Yep and @Got_M can confirm MHD OTS E40 did ~8.7 right? Pretty impressive for the jb4 to match that in some cars.

Now JB4 + MHD backend flash on E50+meth in mid 7s lol

I've got one customer hitting low 8s on JB4+E45 but its thrown a couple codes here and there (his map)

so I don't push it quite that hard

good to hear. I actually googled JB4 vs MHD and there’s not a lot of hard evidence separating the two other than those who have gone from JB4 to full unlock say it’s a big difference. However there’s not many or I haven’t seen many dyno or draggy comparisons other than the dyno short burger did on their E30 tune vs a MHD E40 tune.

I don’t have any “goals” for the car. Just a fun street car.

 

[bushido]

Yep and @Got_M can confirm MHD OTS E40 did ~8.7 right? Pretty impressive for the jb4 to match that in some cars.

Now JB4 + MHD backend flash on E50+meth in mid 7s lol

I've got one customer hitting low 8s on JB4+E45 but its thrown a couple codes here and there (his map)

so I don't push it quite that hard

stock/high flow cats are running high 7s on MHD E40

catless custom tune MHD E50 can run 7.3s

for added context, OTS MHD E40 and OTS BM3 E50 are pretty much bumper to bumper
(AT)(AT)(AT) idk about MT numbers down here

 

[BayeauxSupra]

stock/high flow cats are running high 7s on MHD E40

catless custom tune MHD E50 can run 7.3s

for added context, OTS MHD E40 and OTS BM3 E50 are pretty much bumper to bumper
(AT)(AT)(AT) idk about MT numbers down here

?

So there’s good chunk of meat left on the bone going unlock Vs JB4

 

[ColonelAdama]

?

So there’s good chunk of meat left on the bone going unlock Vs JB4

half a second probably.

 

[BayeauxSupra]

Inching closer to 8s 60-130

Stock rubber not hooking up. Highest trap speed in the 1/4.

Was able to into the 11s in 1/4 but still not a good launch

Here below I was practicing my launch. Wonder what the 1/4 would’ve been had I stayed in it.

Thanks everyone. Your tips and suggestions are working.

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