Dissapointing year end with my Roush 427R

[SwiftDB4]

I've had oil burning issues on my 427SR, but not as bad as some of the posters. The MSD ignition cap had broken the center electrode off and I didn't find this until the engine had 3000 miles on it. I assume fuel wash may have affected ring seal, but I do get compression readings of 170-185psi. Since changing the MSD cap and going to a QF carb with leaner idle and main jets, oil on the spark plug threads is virtually gone. The engine now has about 10,000 miles and burns 1qt./1200 miles. Otherwise it performs well. Is the oil consumption to be expected for these Roush stroker engines?

[jhv48]

My 427 SRTW (with 10,000 miles on it) goes through a quart every 1300 miles. The plugs look perfect on all 8 cylinders. No smoke from the exhaust nor internal leaks. All eight cylinders have relatively the same compression.

Therefore, I'm assuming this oil consumption is normal. At least I'm not going to worry about it unless it suddenly doubles.

[james911pro]

Originally Posted by SwiftDB4

I've had oil burning issues on my 427SR, but not as bad as some of the posters. The MSD ignition cap had broken the center electrode off and I didn't find this until the engine had 3000 miles on it. I assume fuel wash may have affected ring seal, but I do get compression readings of 170-185psi. Since changing the MSD cap and going to a QF carb with leaner idle and main jets, oil on the spark plug threads is virtually gone. The engine now has about 10,000 miles and burns 1qt./1200 miles. Otherwise it performs well. Is the oil consumption to be expected for these Roush stroker engines?

Swift, I never thought of that but when my dealer changed the plugs after the carb was replaced by roush the all seemed to have the same bad carbon build up. None worse than the others. But I might check into them jsut in case. From what I heard here and about Roush engines 1pt per 1000miles seems "normal".