So, I've picked up an AP2 shell, complete minus engine + trans, and I'm now sourcing it's new heart transplant. I'm looking at buying an F22C with 51k on it this Sunday, and I've had 2 compression tests done on it. First test was done cold by accident, second was fully warmed up. First was 180 all across, warmed up was 220 all across.
Should I be worried about 220 compression on an engine with only 51k on it? Obviously, these aren't cheap. Plus, I'm extra paranoid as I've already replaced the engine in my current AP1 once due to bad compression.

 

Nominal compression from the factory is 228 psi +-10%

 

Yeah, I've seen the factory numbers, which is generally regarded as lower than new, with 240 being new. I've seen F22's shoot as high as 270's to 280's though, so maybe I'm just being over paranoid with this.

 

With them being even numbers across the board (which is the most important factor in determining an issue) Id guess the gauge reads on the low side. Id go for it if the price is right. 51k is a solid mileage to invest ones trouble in.

 

no

 

it was probably driven harder or your gauge reads low. my compression numbers (i'm at 58K) are pretty close to 240 all across using a snap-on tester.

 

Consistency across cylinders is key.

Many on here have a hard-on with blowing 240 across the board, when things like gauge calibration, sea level, temperature, human error, etc. all play a part.

Just another pissing contest on this board IMO.

 

Numbers look good to me. What ECU? What year engine?

Unless we're comparing certified, calibrated compression gauges consistency across all four cylinders is the key.

-- Chuck

 

LOL. Yes, consistency is key. Nevertheless, getting 240 across gives me peace of mind.

 

To answer your question, no.

To answer your problem... If you're buying without a warranty or guarantee in writing, don't buy anything you're not prepared to rebuild.

Building a shell car is fun, but there are good reasons that the sucess/completion rate is low.

It either requires a very particular philosophy of approach, or a lot of luck.