My tta is down on power at, and approaching, wot; it won't make full boost. My mechanic tells me he hears rod knock, and the ecm is misconstruing the noise as pre-ignition and pulling timing. He tells me the engine must be pulled and rebuilt, with new, one size bigger pistons, and a new crank unless it can be turned. Does this sound right?
If so, should I go ahead and bore it out to the maximum to increase displacement and power? What is the maximum bore size? I remember ATR used to offer a 4.1 liter engine; is this the max?
Also, I would appreciate advice on which pistons, crank etc. to buy. I assume forged pistons, but is there a particular brand that is best for our ttas?
Thank you!
If so, should I go ahead and bore it out to the maximum to increase displacement and power? What is the maximum bore size? I remember ATR used to offer a 4.1 liter engine; is this the max?
Also, I would appreciate advice on which pistons, crank etc. to buy. I assume forged pistons, but is there a particular brand that is best for our ttas?
Thank you!