TUNING: Knock Detection on a st185

**jazz9** · 08-03-2011, 06:25 PM

Hello Guys,

I've been looking at doing some fine turning on my wolf3d v4 plus on my st185 gt4.

I've ordered a wideband + gauge with datalogging available.

Now for knock detection. Does anyone run a knock light? or do people tune by ear / leave stock timing maps?

I've seen knock lights for < $200 and they hook upto the stock knock sensor. The problem is that I've found in the past (VR4's and EVO's) that the knock sensor fails after a few years. Have people had troubles with the knock sensor of the st185's?

Glen

**MWP** · 08-03-2011, 10:25 PM

Interesting and kinda frustrating topic is this

Ive been looking for the same thing, but every review i read on a knock detection unit/system seems to have equal amounts of "its awesome" and "its crap".
I cant seem to find a product which gets all round (or close to it) praise.

In the end, they always say det-cans and the human ear is best.

**jonathan yee** · 09-03-2011, 12:59 AM

even the J&S safe guard? not read/search but whenever i've heard it mentioned it's only been praise.

**jabbatron** · 09-03-2011, 06:42 AM

..........

**jabbatron** · 09-03-2011, 06:46 AM

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**jazz9** · 09-03-2011, 12:36 PM

Yeah, the current tune that I have has been dynoed, but I don't think it was very good for cruise / offboost.

I've got a WB02 sensor on its way also.

What do you think of this product ?

http://www.turboxs.com.au/index.php?...237&Itemid=275

Glen

**MWP** · 09-03-2011, 12:56 PM

Thats one of the units i did some research on.
Some people say its great, some people say its bad.
Difficult

**jazz9** · 10-03-2011, 01:28 PM

Yeah, I'm going to take a punt and fit one, I'll let you know how it goes.

Wideband should be here tomorow

Glen

**jazz9** · 15-03-2011, 12:55 AM

knocklite isn't here yet

been fixing the afr with the wideband and it has made a huge difference. Pulls to redline harder now. At 9psi WOT it was 13:1 afr!!!! 14psi was 12.5 made both 1 point richer now.

Enabled and configured closed loop, the cruide was 16-17 afr now 14.7 in closed loop.

Fixed a hole in the map @ 1000-2000rpm. It bucked with a lean tune. I went really rich under high load < 2000 rpm ( 11.5 ) from 17-18 amd oy made a huge difference.

Overall the wideband installation was very helpfull. The tune wasn't the greatest and now isn't too bad. I'm getting a EGT sensor and fitting the knocklite next.

I'll keep you guys posted on the knocklite install this week.

Glen