Drag/Acceleration The Official 1/4 mile track thread.

[terrelltechsup]

I think 121mph is the new stock turbo 1/4 mile trap record? w00t!

Just curious, what was the deal with his cylinder 6?

 

[terrelltechsup]

Not quite. Remember cross sectional area is
A=πr squared. In this case a 4in single exhaust offers approximately a 50% flow improvement over 2x 2.25 in. Kinda a mute point though with stock downpipes as they are the restriction.

If you go look at the exhaust he is talking about, you will see it is 3 inch dual from the turbos that merges to a single 4 inch.

 

[Terry@BMS]

Just curious, what was the deal with his cylinder 6?

You mean the IAT spoofing? It's an add on wire (half a fuel wire kit) that lets the JB4 change the IAT and can be useful with WMI kits to increase or decrease timing advance and WGDC to a degree. Sort of a band-aid solution so it's not an official thing.

 

[Matt77]

If you go look at the exhaust he is talking about, you will see it is 3 inch dual from the turbos that merges to a single 4 inch.

I know the exhaust, didn't know he had updated it with 100 cell cats. It was originally just midpipes.

 

[terrelltechsup]

You mean the IAT spoofing? It's an add on wire (half a fuel wire kit) that lets the JB4 change the IAT and can be useful with WMI kits to increase or decrease timing advance and WGDC to a degree. Sort of a band-aid solution so it's not an official thing.

Gotcha. Thanks.

 

[STINGER]

You mean the IAT spoofing? It's an add on wire (half a fuel wire kit) that lets the JB4 change the IAT and can be useful with WMI kits to increase or decrease timing advance and WGDC to a degree. Sort of a band-aid solution so it's not an official thing.

Do you just install it and your ready to go, or do you have to make adjustments?

 

[Terry@BMS]

IAT spoofing is a wire you add to harness, then a setting you enable depending on what you want to do with it. Normally we handle those on a case by case basis.

 

[STINGER]

IAT spoofing is a wire you add to harness, then a setting you enable depending on what you want to do with it. Normally we handle those on a case by case basis.

What are the symptoms to know whether you need it or not?

 

[Terry@BMS]

There isn't a specific symptom. For those pushing boundaries it can be useful though to squeak out another 1psi, for example. So if you fit that model then grab one.

 

[xot1]

View attachment 24213
Have peek at that trap boys and girls

That is very fast!
You are all stock on the intake side?

 

[Get Stung]

That is very fast!
You are all stock on the intake side?

I have injen air intakes, but I'm not sure that's what your referring to.

 

[xot1]

I have injen air intakes, but I'm not sure that's what your referring to.

Oh sorry for some reason I thought you had stock intakes!
How much peak boost are you seeing in logs with your settings?

 

[Get Stung]

Oh sorry for some reason I thought you had stock intakes!
How much peak boost are you seeing in logs with your settings?

 

[xot1]

View attachment 24320

Thank you very much!
Do you have a rough idea about the temperature when you did your run?

 

[Get Stung]

Thank you very much!
Do you have a rough idea about the temperature when you did your run?

 

[xot1]

Thanks!!!

 

[Revvdmedia]

I didn't realize our track opened up already so I'll need to make a trip fairly soon. I'm not satisfied with the JB4 indicated 5.1s 0-60 on Map 2, hopefully the 1/4 proves the car is faster otherwise...should be mid 12's with AWD I would expect?

 

[Tonkabob]

View attachment 24321

Thats some slope for a drag strip. I bet you got a few invalid runs. Too bad the elevation isn't lower it would be a super fast track.

 

[Get Stung]

Thats some slope for a drag strip. I bet you got a few invalid runs. Too bad the elevation isn't lower it would be a super fast track.

it's not, dragy results varied from dead flat to -99. Heres another. They cant seem to get slope right.

 

[Tonkabob]

it's not, dragy results varied View attachment 24337 from dead flat to -99. Heres another. They cant seem to get slope right.

Did dragy also show 121 on your fast trap run?
I put my stock mids back on. Last week run vs today. No real difference.
With da factored only .038 faster with the mid mod. (Run from the same spot)