B16B vs B18C engine wear.

[Kozy]

Worked this out this morning, thought it might be of interest.

One B16B, one B18C. At 100,000 miles at an average of 50mph, both have been running for 2000 hours, or 7.2million seconds.

At 4000rpm, a B16B has a piston speed of 10.3m/s. That's 74,160km that the piston has travelled over that 100,000 miles.

The B18C at 4000rpm is at 11.6m/s. Over that same 100,000 miles the pistons have each travelled 83,250km.

The B16B has a maximum rod angle of 15.78°, the B18C is 18.56°, owing to it's longer stroke and shorter rod, which exacerbates piston wall wear. That's an increase of 17.6%, which if we attributed that as extra wear in the form of mileage, gives an equivalent piston travel of 98,233km.

Working this backwards 98,233km is 9.54million seconds @ 10.3m/s, that's an equivalent of 132,460 miles on a B16B engine.

Extrapolating that out, 150k on the B18C is equivalent to 199,000 miles in a B16B.

That might be why the big brother likes to burn oil then!

 

[shuthanbala1]

Damn you are on it from FB to this in one day haha!

U ain't going to convince us to sell our B18Cs Kozy

 

[Aleex]

that is interesting.

 

[Kozy]

Damn you are on it from FB to this in one day haha!

U ain't going to convince us to sell our B18Cs Kozy

Not at all. It's a great engine, I was just interested to work out 'how much' more stressed it was. From a longevity perspective, the B16B definitely has the upper hand.

It's about all it does have the upperhand at, but in terms of buying used engines, I think it is significant.

 

[shuthanbala1]

Not at all. It's a great engine, I was just interested to work out 'how much' more stressed it was. From a longevity perspective, the B16B definitely has the upper hand.

It's about all it does have the upperhand at, but in terms of buying used engines, I think it is significant.

Just pulling your leg mate, good info but I can't believe Honda would let it out the factory knowing its less reliable than the B16B, that's all, I have known many B18Cs have past 150k and no issues.

 

[Kozy]

One has to be worse than the other in that respect, it's pure physics.

As for rebuilds, they often seem to result in an engine that burns just as much oil as it did before!

 

[Kipper]

Great read there, watched this video and found it quite interesting a car with the lowest km's, 6000km's, set the lowest ps figure and performance increase is almost linear in relation to mileage up to the highest km's which works out to be 68,000km's.

Just showing they do free up some power over time.

I know the PS/BHP figures are never that relevant but can be very useful for comparisons like this.

http://www.youtube.com/watch?v=07N0qPZDt0c&list=PLy774oqLNvHH3eDmRkiH4a_ncyzZC9A7Q&index=54

Forgot the link...

 

[oifovo]

Just pulling your leg mate, good info but I can't believe Honda would let it out the factory knowing its less reliable than the B16B, that's all, I have known many B18Cs have past 150k and no issues.

It is a great testimony to Honda that all of the highly strung B-series (and other series too) last so long, but what Kozy is talking about is quite simple maths with a clear result - B16B has the potential to outlive B18C. I am not aware of any technology present in B18C that would be missing from B16B so no matter how you look at it the B18C is at a disadvantage here. This is not about reliability (i.e. breakdowns) but about wear. New B18C was just as reliable as B16B, it just ages faster.

 

[elchunk]

is your last sentence not the wrong way around, should it not be that for 150k miles on a b16b the equivalent B18 engine will have done 199k miles. meaning that the B18C wears at a rate of 3/2 over the B16B.

 

[oifovo]

is your last sentence not the wrong way around, should it not be that for 150k miles on a b16b the equivalent B18 engine will have done 199k miles. meaning that the B18C wears at a rate of 3/2 over the B16B.

Yes, you are correct, but the rate is 4/3

 

[Kozy]

For the wear to match a B18C at 150k, the B16B would have to clock 199k.

OR

Compared to a B16B at 150k, the B18C would have an equivalent 199k.

Same thing, worded differently.

 

[elchunk]

For the wear to match a B18C at 150k, the B16B would have to clock 199k.

OR

Compared to a B16B at 150k, the B18C would have an equivalent 199k.

Same thing, worded differently.

GG, interesting to know!

 

[Spudski]

Some great info there again Kozy, the differents is quite significant.

 

[Ally138]

For the wear to match a B18C at 150k, the B16B would have to clock 199k.

OR

Compared to a B16B at 150k, the B18C would have an equivalent 199k.

Same thing, worded differently.

mind ****.

Kinda makes me Glad I chose the B16B. The good die young though

 

[R1PPU]

Still cant give you rep. Fuuuuuuu.

Cool info

 

[Kozy]

Still cant give you rep. Fuuuuuuu.

Cool info

You have to share the love around a bit!