Jump to content
Evolution55

Det Issue 4G63

Recommended Posts

Hi there,
This isn't really a G4 issue but I have a G4 plug in in my Evo 1.
I'm getting detonation (hearing det on link knock block) at around peak torque rpm range on wastegate boost.

Wastegate boost is 18psi. Fuel is BP 98 (fresh fuel).

Engine is very stock and only making 217kw.

Turbo is a hybrid TD05h T04E variant.

Compression ratio has been confirmed.

Base timing has been checked and confirmed.

ECT is between 85 - 90 degrees C.

Injectors (ID1000 and deadtimes have been set in the Link) have been checked and cleaned. Fueling isn't an issue. Running a DW300 in tank pump.

IAT is between 23-26 degrees C

Can't run anymore than 7-8 degrees of timing without it knocking especially in 4th gear.
could this be a timing drift issue?
Can't really get it back on the dyno easily to check timing with a timing light while its loaded up to see if it is drifting.

Share this post


Link to post
Share on other sites

I have never tuned an early evo, but the timing you are quoting is pretty normal for the later 4G63's.  Evo 5 & 6 which were around 9:1CR can only take about 8deg at 1bar around peak torque, and will be well into the negatives by 1.5bar.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...