Yes, it's standard in a magazine test, the advertiser's product always produces the most power
In production engine quantity, piston rings are an ant-shit cost component. If the Total Seal Gapless were actually worth 3.5% additional horsepower and torque, they'd be universally used.
On the mass of a farm tractor, the weight differential between the two engines is antshit. Agree, turbo lag isn't a factor. Agree, but would suggest farm tractors pull at torque peak, as defined by EGT. On a diesel the difference between horsepower peak and torque peak is smaller than on a...
The answer on counterweighting is always, "It depends." It depends on number of cylinders, in-line, Vee (if vee, the angle) or boxer, RPM range, iron or aluminum block, RPM range, specific output, and even manual, automatic or CVT.
jack vines
The "displacement versus boost" question was long-ago moot as the future was obvious more than forty years ago. It took some time, but the industry has decided to go with ever smaller, ever higher-boosted engines.
FWIW, SAAB was correct in 1978. They tried to tell the industry and the buying...
Typical US cylinder sleeves come in .093" and .125" wall thickness.
Neither will ruin the bore for future rebuilds. Sleeve back to standard bore diameter with .125" sleeves and they can be rebored .010" or .020" if a future rebuild becomes necessary.
jack vines
FWIW, the 1939 Studebaker Champion was claimed to be the first US production engine to survive 5,000 RPM at full power load on the dyno for hours on end. (JMHO, but this is an example of engines which are long-lived at full load because they are specifically design limited so as not to make...
FWIW, we had a similar jugfuck come along. We loosened the cam by sending the engine block through the bake oven. Overnight at 600 degrees will burn out the carbon and free galled parts.
Good luck.
jack vines
9quote0JMO but leave the conjecture for the hobbyist forums, they're generally a great place to get bad information. This is a professional engineering forum.(/quote)
For true!
jack vines
No one example proves the rule. I have a neighbor who spits on the ground and curses when BMW is mentioned. He thought he was buying prestige and instead his E39-engined Bimmer bought endless trips to the dealer service department for major and minor fixes. Over the two years he owned it, it...
It depends:
Bore diameter
Length and construction of piston skirt
Piston-to-wall clearance
Rod modulus of elasticity
Piston weight
RPM
Rod material
Block material
Some very high performance engines built with very carefully controlled tolerances actually leave cylinder head witness marks in...
Winston Churchill said, “I only believe in statistics that I doctored myself”.
Your opinions on the 7.3 Powerstroke obviously varies, but they're not shared with the majority. Wikipedia says, "the 7.3 Powerstroke is regarded as one of the most reliable engines ever put in a light duty truck."...
For true, Brian. I edited my first post to clarify that point. For those of us old enough to remember when they first arrived, "VW" has only the one referent. The more recent fifty years are muddied up with Audi, Porsche, SEAT, Bentley, Bugatti, Lamborghini, Ducati, Skoda, et al.
jack vines
Anyone who thinks straight sixes are magically reliable and that Subarus are reliable hasn't been around many automotive machine shops.
Most of the old iron straight sixes mentioned were somewhat reliable because they didn't make enough power to hurt themselves.
Every job shop gets a steady...
You are reconditioning a used engine using low tech parts and procedures; don't overthink it. The thorough cleaning after dingleballing is the best advice thus far. Cast rings seat easily and quickly. Bon Ami? The horror! The horror!
jack vines
Thanks for the information. Question:
When we reassemble the short block, we'll measure the deck height, but the cross-section drawing looks like it would have squish from hell to breakfast (an obsolete engineering term) because all of the piston area is forced up into the tall narrow...
We have two of these and are confident we can get one running. The 1954 block checks out OK, but there were three cylinders not getting what they needed. Two center cylinders on the right bank were running way hot. Our current thinking is somehow the firing order got off or two wires were...
