Hi all. Not new to turbo, but new to Honda turbo.

I have a 1994 Integra with a B17A1 installed, EVO 8 turbo (Mitsu TD05-16HR 9.8), 550 cc injectors, small FMIC, etc.

I'm using a Hondata s300 V3.

Pretty typical install really. I built a semi ram turbo manifold. 2.5" Exhaust.

All the fun stuff is disabled, including VTEC. Keeping it simple to start. Running pump gas at 91 octane.

So, first time on the road, and just before it hits boost the engine gets pretty flat. Like timing is pulled, and of course it's being pulled via knock.

My A/F is rich (Just starting to tune) at about 12:1, so really no reason to start knocking even before hitting boost. Weird.

So, I disabled knock and she runs strong, spools great up to the wastegate opening (5-6 psi) around 4k and pulls hard to 8k...no audible pinging/knock at all.

So what gives with the knock sensor? I've used others (GM mainly) in the past and found them to be a reliable way to determine the edge of the tiing envelope. Not this thing!!!


Any insights?


Thx,

Chay Foss

 

A lot of the knock sensors for Honda are sensitive, and register "noise" as engine knock, even if not in positive boost pressure.