|
Agree to disagree. Sleeving doesn't take much out of the block, but that's not my area of expertise. I know HPF sleeved their motors (at least for a while... I'm not sure what their "Stage 5" build had), and I know multiple stock S54 blocks that have failed at 700-800 whp. Often the information isn't shared, because people jump to conclusions about tuning and engine building capabilities. They assume Shop X can't build motors as well as Shop Y, because Shop X blew up a motor while Shop Y still has theirs running and making more power. At those power levels, it's all about showmanship to draw in more business. Few shops will admit they pushed the limits too far for too long.
Attached are a few dynos I found with a quick Google search. I don't claim any rights to the images. You'll notice the high horsepower S52 motors spool quicker, and both are run to similar rpm as the built S54's (8000 rpm and 7400 rpm).
@4.5k rpm (whp), S52 (460/620); S54 (240/275)
@5k rpm (whp), S52 (700/900); S54 (320/400)
@5.5k rpm (whp), S52 (800/1090); S54 (450/660)
The MaxPSI car is even tuned on the stock DME. The HPF car's dyno was not SAE corrected (probably because it didn't hit 1000 whp with SAE correction)... nonetheless, it ran 29 psi of boost. The Maximum PSI car ran 34 psi of boost. I don't know what the other two cars ran.
My original comment was regarding the S54 having thin cylinder walls, and how the older iron block engines have gained a following due to their ruggedness. I think everyone was fascinated by the S54 for quite a while, but lately we've found that the limits of the stock M/S 50/52 are higher. I'd rather not derail the thread further... I only wanted to point out that the thin cylinder walls do make a difference when it comes to extreme builds, and the older engines seem to be more comfortable with high levels of boost. At stock or moderate boost levels, the S54 has no issues.
|