Engine Replacement Choices

"Something came loose" in the engine while my 19 year old son was taking my '93 to wash. Apparently (this time) no fault of his. I am confronted with engine replacement, and am taking a "blank sheet" approach. Since it spends life under a cover or in the shop, I haven't ruled out the ugly (rational) choice, but for now I'm fixing it. Expense is a consideration, but I have no appetite for spending a lot without some improvement. It was stock GTS, so better than that is the standard. I dropped the list some time ago and haven't kept up but rejoined to get the benefit of current thinking on engines: Bored/Stroked? Turbocharged/Compressed? Hybrid? Source? I did say blank page. What would you do? Thanks.

It would depend on the use.

You can avoid any emissions questions generally by boring and stroking.

You can go SC with twin screw for hp right off the line, or centrifugal for more normal low rpm behavior and perhaps higher hp at higher rpms. Generally the centrifugal kit is readily available and the twin screw is not.

You can go turbo, but it is likely to be more expensive than either SC option and is more complicated as well.

Of course if money is no object, perhaps bored with a GTS stroke and either centrifugal SC or turbo kit on top would be interesting, but then be prepared to start need replacements for other parts that break (transmission) or need upgrading (brakes).

Just my quick 2 cents.

www.928motorsports.com/parts/long_block.cfm

I wouldn't be able to sleep in your position. That engine is just too close to irreplaceable for my comfort. If you're certain that the issue is the result of a mechanical failure you need to immediately check for a timing belt failure. That would take maybe two minutes of your time. If the belt is still in one piece then I would immediately raise the engine and pull the oil pan to see if a bottom end failure occurred. Please report back with findings. Personally, I would be more inclined to keep everything as original as possible. Especially if it's a low mileage cream puff. The GTS is just that rare in my opinion. Take the time to determine the condition of your original engine before committing to anything. Just my take. I wish the best for you.

Give Greg Brown at Precision in Ca a call. He builds the best stroker motors.