Can someone help me figure out whats wrong with my car ?

[DCT_JAY]

The car just feels really sketchy and less stable

Mods:
Intercooler
Downpipes
MHD stage 2+

Car : 2011 335is 84k miles

https://datazap.me/u/jay335is/stage-2-e30?log=0&data=3-22

 

[veer90]

There's nothing obvious wrong with the logs that I could see. In fact they look very good.

Can you elaborate what you mean by sketchy? Stability at speed is usually tire/wheel/suspension/alignment related.

 

[DCT_JAY]

There's nothing obvious wrong with the logs that I could see. In fact they look very good.

Can you elaborate what you mean by sketchy? Stability at speed is usually tire/wheel/suspension/alignment related.

I don't feel as if i am making power , i had another person tell me my High pressure fuel pump looks like its going out. Also when i looked at the logs i am not even hitting target boost through the pull

 

[DCT_JAY]

There's nothing obvious wrong with the logs that I could see. In fact they look very good.

Can you elaborate what you mean by sketchy? Stability at speed is usually tire/wheel/suspension/alignment related.

i don't how to properly explain but the car felt much healthier and noticeably better power delivery when on 93 OCT stage 2 + tune

 

[veer90]

Log boost mean next time and see how close that is to target. You could also ask Ken Atkinson directly, he wrote the N54 OTS MHD maps.

Rail pressure looks healthy lowest I saw was 18xx psi

 

[DCT_JAY]

Log boost mean next time and see how close that is to target. You could also ask Ken Atkinson directly, he wrote the N54 OTS MHD maps.

Rail pressure looks healthy lowest I saw was 18xx psi[/QUOTE

Ill shoot him a email

 

[Torgus]

You are a few PSI under target the entire pull. I would do another pull and rev it all the way out.

Can't hurt to add LPFP but I would bet it is fine given your HPFP.

 

[DCT_JAY]

You are a few PSI under target the entire pull. I would do another pull and rev it all the way out.

Can't hurt to add LPFP but I would bet it is fine given your HPFP.

I uploaded three runs in that log

 

[matreyia]

I uploaded three runs in that log

I noticed decrease 8n power over time even though I kept upgrading...in the end it was boost leaks...and improper bov hose size too small. Now the car is a beast...and I am still on a crusade to plug all possible leaks.

 

[matreyia]

I uploaded three runs in that log

Oh...also....THIS:

If your mounts have no been changed at 100k miles....change them.

 

[DCT_JAY]

I noticed decrease 8n power over time even though I kept upgrading...in the end it was boost leaks...and improper bov hose size too small. Now the car is a beast...and I am still on a crusade to plug all possible leaks.

What hoses should i replace ?? Or if yo could point me in the right direction

 

[Torgus]

What hoses should i replace ?? Or if yo could point me in the right direction

Well all vacuum lines should be a start and small money. Just take your time removing and reinstalling. I use the fancy platinum cured ones but any new ones should be fine. If nothing but preventative maintenance.

Your diverter valves could leak. Normally people upgrade to a charge pipe and tial BOV to avoid that problem but you will want to upgrade your vac source from the manifold(easy)

After that you can smoke or pressure test the intake tract for any leaks.

Or you could have worn waste gates and need a new FI solution but that is worse case. You could also go for a custom tune but I would fix the underlying issue 1st.

 

[DCT_JAY]

Well all vacuum lines should be a start and small money. Just take your time removing and reinstalling. I use the fancy platinum cured ones but any new ones should be fine. If nothing but preventative maintenance.

Your diverter valves could leak. Normally people upgrade to a charge pipe and tial BOV to avoid that problem but you will want to upgrade your vac source from the manifold(easy)

After that you can smoke or pressure test the intake tract for any leaks.

Or you could have worn waste gates and need a new FI solution but that is worse case. You could also go for a custom tune but I would fix the underlying issue 1st.

Would you mind linking me to the ones you bought ?

 

[Torgus]

Would you mind linking me to the ones you bought ?

https://www.verociousmotorsports.com/Shop-by-Category/Silicone-Vacuum-Hose-Kits

Just buy by the foot for the diameter you need. Stock should be fine, I just bought these.

I think this has all the lines: https://www.e90post.com/forums/showthread.php?t=894084

Even if not the issue a small investment to rule away future issues.

 

[matreyia]

Would you mind linking me to the ones you bought ?

Verocity is very good. 12 ft. Is enough.

Stock lines are all 3.5mm. Or 4mm. Either will be fine.

Tial Bov line must be 6mm. Always get highest grade. DO NOT SKIMP on hoses. There is no excuse.

Finally, make damn sure those valve cover nipples are completely sealed and use the Vader Solutions BOV adapter to hook up the 6mm hose to the Tial BOV. (Not HKS BOV)

After all hoses are upgraded and zero valve cover leaks...your car should be a monster. Unless you have a leak in you vakve cover or somewhere in the numerous pcv links.

 

[DCT_JAY]

Verocity is very good. 12 ft. Is enough.

Stock lines are all 3.5mm. Or 4mm. Either will be fine.

Tial Bov line must be 6mm. Always get highest grade. DO NOT SKIMP on hoses. There is no excuse.

Finally, make damn sure those valve cover nipples are completely sealed and use the Vader Solutions BOV adapter to hook up the 6mm hose to the Tial BOV. (Not HKS BOV)

After all hoses are upgraded and zero valve cover leaks...your car should be a monster. Unless you have a leak in you vakve cover or somewhere in the numerous pcv links.

Thanks guys this was extremely helpful ill report back after i get that stuff done next weekend

 

[matreyia]

Would you mind linking me to the ones you bought ?

Actually for you... stick with 3.5mm to be safe. No chance of slipping off.

 

[Torgus]

Also a small zip tie after the vac barbs never hurt no one. Overkill but no cost.

 

[matreyia]

Also a small zip tie after the vac barbs never hurt no one. Overkill but no cost.

I am actually doing that after I receive my Stett Performance stainless steel canisters sometime this eon.

 

[veer90]

Also a small zip tie after the vac barbs never hurt no one. Overkill but no cost.

vac line zip ties on manifold barb and bov barb is tradition at this point lol