The official ask zrk anything thread

[FLtrackdays]

Probably just use whatever the Z4 uses.

Yeah, none available but you’re right. That works the majority of the time

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[bushido]

have you really been far even as decided to use even go want to do look more like?

 

[zrk]

have you really been far even as decided to use even go want to do look more like?

yes

 

[BadDecisions]

To check the axle is there anything specific to check other than seeing if it’s loose in the couplings?

Put the car up yesterday... a fricken wheel weight fell off and was clanging back there. Other than my Welds and MT ET Streets being unbalanced, all should be good for now. Both axles felt great.

Cause Zack is secretly for sale.

Secretly? Everyone has a number. And it's lower than you think.

 

[Jmanlevan]

@zrk Can you please tell me your thoughts (and also explain to me since I admittedly don't have a ton of knowledge) on single exit exhausts for this platform in regards to back pressure? I like the sound and look of SP1R's single exit but I have seen some people comment about negative effects of back pressure from a single exit on this car and other B58 Bimmers. Is there any reason to avoid a single exit design and stick with dual exit designs?

 

[jtsang25]

Didn't know where else to post this and didn't want to get flamed for starting another thread. I know 12B701 and 12AB04 are O2 sensor codes.

Which ones are phantom codes and the ones that are not any I should be concerned about? No accidents, stock suspension, no tune, no external electronics installed.

Added screen shots. Probably seems sketch having a random attached file.

 

[zrk]

@zrk Can you please tell me your thoughts (and also explain to me since I admittedly don't have a ton of knowledge) on single exit exhausts for this platform in regards to back pressure? I like the sound and look of SP1R's single exit but I have seen some people comment about negative effects of back pressure from a single exit on this car and other B58 Bimmers. Is there any reason to avoid a single exit design and stick with dual exit designs?

No. No reason to avoid.

 

[aspaw1n]

hello dad zrk

purely your own opinion

hks or valvetronic or boostlogic or ams dp + stock exhaust

 

[zrk]

hello dad zrk

purely your own opinion

hks or valvetronic or boostlogic or ams dp + stock exhaust

RK Titanium

 

[mattg2793]

Hey.. you have a $8000 budget for coilovers and performance suspension parts… you want a square fitment, and are getting the titan-7 18x10.7.

what coilover and suspension parts would you suggest? And tires/size.

not tracking. want to not die going WOT. would ideally maximum traction for dig and 60-130 stuff, though realize these aren’t the best dig cars. ECU tuned with FBO.

also, opinion on adding Visconti flex fuel kit? heard some bad stories.

 

[zrk]

These cars are perfectly suited for dig/drag racing.

You want an 18" square setup or you want to go dig racing? I don't understand the question.

The stock suspension with some SPL bits is more than enough for what I do. If you want to use the steering wheel you should probably ask Jackie Ding or @razorlab

 

[razorlab]

Hey.. you have a $8000 budget for coilovers and performance suspension parts… you want a square fitment, and are getting the titan-7 18x10.7.

what coilover and suspension parts would you suggest? And tires/size.

not tracking.

Save yourself a ton of money and just get the HKS Adjustable Spring kit that works with your OEM struts and gives you clearance up front for wider tires.

For better predictable traction in the rear, just get the SPL traction arms.

Use more of your money on good tires.

 

[suptj]

I’m using BM3 -
Which map do you think will show more timing with E40 gas?

1) Flex fuel ACN91 multimap
2) E30 standalone map

 

[zrk]

I’m using BM3 -
Which map do you think will show more timing with E40 gas?

1) Flex fuel ACN91 multimap
2) E30 standalone map

lmao. I have absolutely zero idea. I don't use OTS maps.

 

[razorlab]

I’m using BM3 -
Which map do you think will show more timing with E40 gas?

1) Flex fuel ACN91 multimap
2) E30 standalone map

F around and find out will give you the answer.

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