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Trucker Forum - Trucking & Driving Forums - Class A Drivers (https://www.classadrivers.com/forum/)

- Owner Operators Forums (https://www.classadrivers.com/forum/owner-operators-forums-105/)

- - Cat C13 vs Cat C15: why pay more? (https://www.classadrivers.com/forum/owner-operators-forums/22545-cat-c13-vs-cat-c15-why-pay-more.html)

Bobby

11-25-2006 02:28 PM

The way those spec sheets work is you start with a base truck with no upgrades, with it's price and weight.

As you ad upgrades like the bigger engine... it ads cost and weight to the base or generic truck. That's the figures your seeing, Cost and weight over a stock engine.

edit: The zero's represent a standard part included with the base truck, with no increase in weight or price.

My C-15 was 719 lbs over for an 01 model...pre Acert. My sheet doesn't show the cost, but they have gone way up it looks like.

marylandkw

11-25-2006 03:32 PM

Quote:

Originally Posted by Bobby

The way those spec sheets work is you start with a base truck with no upgrades, with it's price and weight.

That makes sense. That's the good thing about these boards, You can learn something.

Quote:

Originally Posted by GMAN

That engine price is hard to believe. It can easily cost more than that for an in-frame. If that is all they cost, then it would be better to just throw the old engine away and buy a new one to drop in when you need a new engine.

Kinda like those new free radiators Solo379 and I are looking for :lol: :lol:

Bobby

11-25-2006 03:54 PM

It will also show a savings in weigh. Aluminum wheels on my sheet (24.5's) showed a minus 46lbs front and minus 184lbs rear over the standard steel wheels for example.

Ian Williams

11-25-2006 04:41 PM

Quote:

Originally Posted by marylandkw

Hopefully I don't get flammed for this one but here goes....

Bigger Motors get BETTER fuel economy.

That C-13 will be working it's exhaust pipe off to make those numbers.

The C-15 set that low will barely be working.

Now I drive conservatively with a C-15 rated at 550hp with 4.11 rears and an 18speed and get 7mpg all day and night.

I don't know how much a C-13 costs now a days but the spec sheet in front of me for my new truck (should have it in a week or two) says the C-15 weighs 941 pounds and the line item cost is $12,874

At my work about 3 months ago they turned up the power on our tractors and we actually get better fuel mileage. Here in Reno most of our line runs are going over mountains 80 & 395 or pulling heavy sets of triples.

Now coming home from Sacramento I just get passed by most other rather than all.

RostyC

11-26-2006 12:15 PM

I was getting exited there for a moment, I was gonna order one for my lawn tractor :lol: :lol: :lol:

60363

11-28-2006 03:03 AM

According to Cat's web site these 2 engines weigh:

Cat C13 Cat C15
2270 lbs. 2890 lbs.

Some posts here referred to much smaller numbers.

solo379

11-28-2006 03:21 AM

Quote:

Originally Posted by 60363

According to Cat's web site these 2 engines weigh:

Cat C13 Cat C15
2270 lbs. 2890 lbs.

Some posts here referred to much smaller numbers.

Once again, neighbor :) , it was just the difference, between "base" and "optinal"! :wink:

allan5oh

11-28-2006 05:14 AM

Re: Cat C13 vs Cat C15: why pay more?

Quote:

Originally Posted by 60363

Cat C13, Multi-torque

80,000 lb GVW
430-hp, 1550/1750 lb-ft
1325 rpm @ 65 mph

Cat C15, Multi-Torque

80,000 lb GVW
435-hp, 1550/1750 lb-ft
1325 rpm @ 65 mph

What's missing is the RPM of the HP and TQ peaks. Also, the c13 might have the same tq and hp, but they may be more "peaky". The c15 will have what drag racers call "more power under the curve".

60363

11-29-2006 02:09 AM

allan5oh

Peak torque for both C13 and C15 in these configurations is the same: 1,200 rpm.

BUT: C13 with 430 hp and 1550/1750 lb-ft of torque shows TORQUE RISE as 44%/63%; its maximum HP is 445; while C15 with 435 hp shows TORQUE RISE as 43%/61% and its maximum HP is 450.

Cat C13 with 470 hp 1,650 lb-ft of torque has 40% TORQUE RISE.
Cat C15 with 475 hp 1,650 lb-ft of torque has 39% TORQUE RISE.

As you can see there's no big difference still.

But:

Cat C15 500 hp 1850 lb-ft of torque has ... 56% TORQUE RISE.

NascarFan

12-01-2006 06:55 PM

A buddy of mine used to own a truck with the C13 @ 430HP and said he constantlly got around 5.5 to 6mpg now he has the same truck just with a C15 @ 435HP and gets 6 to 7mpg.

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