The Random E46/ZHP Question Thread

[ZHPizza]

Ahh my apologies. I mean, how bad are repercussions you receive while driving... as in, if you hit a big bump/pothole, how much feedback do you receive in the driver’s seat... Worse, or better?



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Should be improved with lighter wheels/tires. Lets the suspension work with less momentum from the weight.

[Newjack]

Ahh my apologies. I mean, how bad are repercussions you receive while driving... as in, if you hit a big bump/pothole, how much feedback do you receive in the driver’s seat... Worse, or better?



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Pretty much what pizza said. Lighter wheels are easier to keep planted, and I also went with 17's which are a slightly softer ride overall.

I wouldn't ever go back to stock ZHP wheels.

[BMWCurves]

Curious, in your experience, if since the Apex wheelset would be lighter, if the “crashiness” of the ride feel over uneven surfaces and bumps would increase, in comparison to the 135’s?

That’s one of my main hangups with upgrading... i’m still running stock suspension, fwiw.


Apex’s might be worth looking into down the road... but i also appreciate keeping the ZHP as close to “stock” looking as possible.




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If you're on stock suspension with anything above 50k miles, a suspension refresh will help a lot with that "crashiness" feeling. I noticed it in my worn shocks, especially on low speed bumps that should not cause the suspension that much trouble. Definitely improved with a suspension refresh. Here's what I did to get an "OEM+" feeling in my suspension:

http://www.zhpmafia.com/forums/showt...miles-10-years

Also, I switched to 17" APEXes. I had the dual benefit of reducing unsprung weight from the wheel which should improve ride comfort some regardless, and then I also effectively increased the sidewall of the tire, which should provide some sort of ride comfort improvement as well.

[YoitsTmac]

damn guys, I'm getting really frustrated in my research. I finally told E46F about my 6-speed swap and am slowly getting parts together when I can. What fluid should I put in it? I hear D4 ATF, Redline MTL, and Pentosin MTF-2. I somehow ordered MT90 back when I was first getting parts. I live in a warm climate, around SF, so cold weather is low concern. Any help would be appreciated!

[ZHPizza]

damn guys, I'm getting really frustrated in my research. I finally told E46F about my 6-speed swap and am slowly getting parts together when I can. What fluid should I put in it? I hear D4 ATF, Redline MTL, and Pentosin MTF-2. I somehow ordered MT90 back when I was first getting parts. I live in a warm climate, around SF, so cold weather is low concern. Any help would be appreciated!

Redline D4 ATF my dude
Recommend by Redline and most everyone here

[YoitsTmac]

Thanks! Guess I'll use the MT90 as fire starter or something :P

[704sw]

Still getting some midrange throttle surge after the Vanos seals were replaced. What’s the next thing to check? ICV? O2s?

[Sockethead]

Are you sure you're not feeling the transition of the DISA valve opening? I firmly believe this is what's causing it. There is going to be a disruption of flow through the manifold for a split second as the DISA opens and the manifold volume changes... This is why it goes away when folks disconnect the DISA from the system...
My dyno run before the supercharger clearly shows the transition and it's gone in the subsequent runs after the supercharger install which replaces the stock manifold/DISA setup... granted, there is a tune involved but after research by Ryan and other tuners, they are hardly changing anything in the DME

[704sw]

I suppose it could be? It’s happening where I carry a gear through a corner and try getting on the throttle as I’m tracking out. Seems to really only affect 3rd and 4th.

[san]

I suppose it could be? It’s happening where I carry a gear through a corner and try getting on the throttle as I’m tracking out. Seems to really only affect 3rd and 4th.

How was the track day btw?


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