Does anyone have a good link or other source for correct torque figures and build tolerances for the 550 Maranello engine. I have been delivered one in pieces after another specialist gave up his attemp to re-build the oil starved engine. (oil cooler damaged and run dry). Thanks in advance
I have the printed shop manual, if it has hat you need, i will fax pages. Call 317 271 9955. Brian www.autocarsports.com
Hi Phil, All I have is a workshop manual, so if you draw a blank on your other options let me know what you need and I'll help as much as I can. MW
I've not had a good look yet, but I may use some of my tweaks from the 360 speciale I built in it. I can get long stroke (575) crankshafts made for much less than a std new one, and also change to steel rods (575) and hi comp pistons, again, much less than std parts. A bit of work on the valves and heads, some hi flow air filters of course, and maybe some race cats and we'll be pushing 550BHP with a bit of luck..... I'd be surprised if it costs more than a basic repair using factory parts. The container of race spares from the ex Olive Garden 550GTS the race team bought arrived this week, there's two complete race engines and a mountain of bits, so I'll have some good references to go on.
A complete rebuild of an F355 engine runs in the $15K-$20K range*, so I would expect a complete rebuild of a 550 would run in the $20K-$30K range. * including dropping the engine and replacing it back in the car.
"Rebuild" is a very vague term. On the race 360C's I do, a "Refresh" is a full strip and re-assembly after crack testing, With new parts "as necessary". That "usually" means crank bearing set, rod bolts, oil pump chain and tensioner, valve springs (as they're almost as cheap to replace as they are to spend the labour to test for some strange reason), and a few auxillary parts like upgraded variators and tensioners etc. Every second refresh (10,000 race km), I prefer to fit new rods, new pistons complete with rings, new valves etc, so it's really hard to say what a rebuild is. So far I've found no reason to replace liners or crankshafts., other than after blow ups.......... Typically, A first refresh cost about AUS$15,000 on a 360 and a second one more like AUS$25,000, but's it's too hard to give actual costs. Many things crop up which can throw costs out the window.......the latest bulletin I've seen for 360 engine says to replace the entire block as some oil drillings are now smaller than they used to be! For a race engine, there's never any warranty, so the owner is given options on what he can chose to replace. For a road car however, most commercial laws impose warranty whether denied, implied or given, so the repairer must advise that to repair the engine to a satisfactory roadworthy condition, the following parts need to be replaced etc etc....... The owner of this 550 engine is happy to take his chances with a semi race engine on the road.........as are most
While we're at it.. Anyone know the compression specs I am looking for on a healthy 550 engine? Thanks!
Sorry. I've never done a comp or leak test on a 550 yet, they're pretty bomb proof in my experience. A 360 will show about 170-185 lbs comp, depending on temperature, so I guess a 550 should be 165-180 lbs, but I'm only guessing. As long as they're all within 5% of each other it'll be as good as new. A leakage test always yields far more information.
