[Supras] Mystery Knock? (related to high rpm shifting?)

[Dave Henry]

If you had aftermarket pistons, I'd say you were getting piston slap until 
it gets up to temp.  But I'm assuming you have oem pistons?

DaveH

----- Original Message ----- 
From: "Rockey Fox" <supr91tt at yahoo.com>
To: <supras at supras.com>
Sent: Monday, April 16, 2007 1:57 PM
Subject: [Supras] Mystery Knock? (related to high rpm shifting?)


>I frequently shift at 6500 rpms and did pay for the rotating assembly to be 
>balanced during the rebuild. After a year now I do detect a slight knocking 
>when I boost (even 2psi) before the engine reaches operating temp. There is 
>absolutely no detectable knock under any circumstances after operating 
>temperature is reached.
> I did recently upgrade the compressor to 57 trim on the CT-26 and I limit 
> boost to 11psi on the stock ECU and injectors, FIPK and 3" exhaust from 
> turbo via a defcon downpipe and crinkle bent (already on the car when I 
> bought it) exhaust.
> I'm leaning toward wrist pin more than rod bearing noise but I won't 
> really know until it breaks. Any other ideas? I didn't bore or replace 
> pistons during the rebuild.
>
> Rockey 91T
>
>
>
>
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