[Shawn 335xi]

Title says it all. It was a 85 degree day and engine temp was reading 240... Is that a normal time for the JB4 with 94 octane. I was expecting to be in the low 12's

[junitos]

What other mod's ...
Auto , or 6mt ,

[Shawn 335xi]

Originally Posted by junitos

What other mod's ...
Auto , or 6mt ,

Auto

[Shawn 335xi]

Injen DCI

[smallseafishie]

tires? FBO?

[BEAR-AvHistory]

Without downpipes you should be running map 1 if you want to use a fixed map. If you use map5 you need to be sure its acclimated with at least 3 WOT runs in 3rd gear.

If you acclimate map 5 then go to another map you have to redo the WOT runs when you switch back because it loses everything it learned on a map switch.

The WOT runs will give it a quick head start in learning the car. They are not necessary because the car is always learning with map 5 unless you are doing map switching to make comparisons & have a major change in fuel quality that you need to dial in fast.

Car should run a bit better but I would not look for low 12's on just a tune with pump gas. It would need E85 or 100 octane mixed in.

[paulguma]

a lot of factors for this. need more details.

[infidel335]

Map 2 with no downpipes?

[Bakeme521]

I ran a 13.5 bone stock.

[Shawn 335xi]

think i found out the reason why... yesterday i had long cranks and shaking engine like a misfire, but it wasnt a misfire because it was at engine start up. last night i took the jb4 off of my car and still today long cranks, but no misfire or shaky engine. i feel an HPFP issue brewing in my car.


agreed?

[Shawn 335xi]

Originally Posted by BEAR-AvHistory

Without downpipes you should be running map 1 if you want to use a fixed map. If you use map5 you need to be sure its acclimated with at least 3 WOT runs in 3rd gear.

If you acclimate map 5 then go to another map you have to redo the WOT runs when you switch back because it loses everything it learned on a map switch.

The WOT runs will give it a quick head start in learning the car. They are not necessary because the car is always learning with map 5 unless you are doing map switching to make comparisons & have a major change in fuel quality that you need to dial in fast.

Car should run a bit better but I would not look for low 12's on just a tune with pump gas. It would need E85 or 100 octane mixed in.

thank you for your advice... thats stuff i didnt know. on the map guide that i printed off it doesnt say or note any of what you just said for the different maps. i just went and looked at the latest sheet though on N54tech and it states some recommendations, but what you said is more useful to me. i have 19 inch wheels and wide tires in the back, 275 and 245 in front. i should be in the 12's at least, but with HPFP issues, im wondering if the car realized that and wouldnt up the boost that a tune was trying to push through it. the car has run a lot quicker before, a lot different than the way it ran at the track so i know it is capable of doing a lot faster, but first i need to get this shakey engine and long cranks fixed.

[Shawn 335xi]

Originally Posted by smallseafishie

tires? FBO?

what is FBO?

[WRichieX]

Originally Posted by Shawn 335xi

what is FBO?

Full bolt on. Haha. I didnt know what that meant eother when I first got on this forum.

[smallseafishie]

Originally Posted by Shawn 335xi

what is FBO?

FBO = full bolt on

Usually means Tune + Intake + DP + FMIC. There's also methanol injection but that's usually referred to as FBO + Meth

[Hoooper]

track location? timeslip? so many variables in a 1/4 pass its impossible to say anything without knowing a lot more about the pass. As far as we know this took place at 10,000' elevation and you had a 2.6s 60'

[smallseafishie]

Originally Posted by Shawn 335xi

thank you for your advice... thats stuff i didnt know. on the map guide that i printed off it doesnt say or note any of what you just said for the different maps. i just went and looked at the latest sheet though on N54tech and it states some recommendations, but what you said is more useful to me. i have 19 inch wheels and wide tires in the back, 275 and 245 in front. i should be in the 12's at least, but with HPFP issues, im wondering if the car realized that and wouldnt up the boost that a tune was trying to push through it. the car has run a lot quicker before, a lot different than the way it ran at the track so i know it is capable of doing a lot faster, but first i need to get this shakey engine and long cranks fixed.

Check your spark plugs and or your injectors. Tire size does help with traction but more importantly are the type of tires. Wide Nexen N3000 will severely under-perform a skinnier Michelin PS2.

[Shawn 335xi]

Spark plugs were just changed 2 weeks ago

[MasterWang]

Even with e85, I'm not sure if you can be in the low 12's with just jb4 and dci.

Maybe mid 12's with a good launch?

[idrift4wd]

post up the slip.

60'? If over a 2.1-2.2 you need to work on your launch. (auto awd cant be that hard)
trap speed?

car running ok? hitting target boost?

[foghat]

What was your et? That will give a pretty good indication as to whether you are making the power you should be. If you are, then it is likely just a practice your launch type of thing.

Altitude can also hurt ya.

[JETmn]

Originally Posted by foghat

What was your et? That will give a pretty good indication as to whether you are making the power you should be. If you are, then it is likely just a practice your launch type of thing.

Altitude can also hurt ya.

His ET was a 13.5. I think you want his trap speed

[foghat]

Originally Posted by JETmn

His ET was a 13.5. I think you want his trap speed

gah. ya. trap.