Arrow rebuild update after 2,200 miles (some interesting stuff)

[SoCal Rebell]

Well its been 2,200 miles since I got back my 00' RT from Arrow and here is an update, changed the oil after 200 miles so in the last 2,000 miles I have burned only 1 quart. I wanted to know what exactly was done and get a report from Arrow only to be told that was not possible, well finally after a little nagging I got a three paragraph report from Arrow which consisted word for word of the following:

Invoice # YV603104
Powdered metal cylinder liners may have been the cause of high oil consumption the customer reported. The block was returned to the original manufacture for liner replacement and re-decking (does this mean I have a higher compression?)

The engine was rebuilt using all new parts such as a crankshaft, camshaft with lifters, piston/rod assemblies, timing chain set, two exhaust valves, one intake valve, water pump, rod/main bearings, gaskets and seals.

The engine is then sent to our dyno facility for a two hour break in period and three W.O.T. power runs to confirm the engine meets rated h.p. and torque #s. A cylinder leak down and and compression test is performed, with an inspection of a special oberg oil filter and a final check for any external oil leaks, the engine is readied for return shipment.

Pretty cool stuff, I have a new engine after 10,000 miles, and it goes to show if you push hard enough you will get the info.

 

[Sean Roe]

Hi Jon,
Please post what exactly is getting broken in (after an Arrow rebuild). What do they tell you has to break in that doesn't occur during the quote "break in" time on the dyno? The valvetrain has roller lifters, so breaking in the cam isn't an issue. So, what is? We know that it takes longer to seat rings with synthetic oil. Is that it? Are they using standard or synthetic oil on the dyno. If the engine wasn't broken in (rings seated, etc.) after running on the dyno, do you think they'd do a full throttle pull? Please, take no offense, just wondering. Since you preach it, I figure you must know.

 

[Frank 03SRT]

Furthermore, after just coming back from a wonderful Conner Assembly Plant visit, I learned that they dyno each and every car. Doesn't a dyno put the engine through the same type of stress as hard throttles during break-in. Why isn't it OK to do a few "factory dyno runs" of your own during the first 1000 miles??

 

[Jay Herbert]

No "hard throttles" during the test.

The factory "Dyno Runs" are not hard runs, they are meant to test the drive train and braking. I sat and watched the "Dyno Screen" for a half hour one day while they were testing a particularly parsnickity Viper (even took a few pictures). The test is very smooth, with directions given to the driver via the screen through the entire test..... shift now, hold 30 mph, accelarate to 60 mph, brake, etc. etc.

If the driver is not smooth, he actually may end up goofing up the test, and have to do it over.