As said 240bhp is expensive! We do an off the shelf 240bhp package but it's specificaly aimed at race cars, ex FR2.0's running in French Hillclimb etc. This comprises of 240 spec cylinder head with single piece valves, new lifters, new rockers, PAC springs, TDF Steel rods with ARP fasteners, TDF specification Wossner forged pistons, ACL race big end bearings, TDF hand finished oil pump assembly and either CAT422 or CAT423 cams depending on where the customer wants peak power. Generaly we run an 8000RPM rev limit with this but we have one customer who has gone to 8400RPM on the downchange way more times than we allow without issue.
The most cost effective option for decent power on the 172/182 is our "motorsport" spec long throttle bodies with ARP rod bolts and CAT421 cams. This will see over 210bhp on an otherwise standard, healthy engine and is bomb proof having been run on road and track by 40 odd of our customers in the UK, France, Switzerland, Australia and Dubai.
Rod bolts is an easy mod and assuming the big ends are in good condition it is just a case of replacing the bolts and job done. In an ideal world you'd use a bolt stretch gauge to torque them but if you don't have access just make sure you use a known, calibrated torque wrench and torque them exactly to ARPs spec having used the supplied bolt lubricant. Failure to do so or use of a rubbish clicky stick means you may as well keep the standard ones in there as at least you know they're torqued to spec!
