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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
nationwide and truck
Legend
Total Posts: 250
Joined 01/28/2009
do theyn use the same engine?
Ultimate Insider
Total Posts: 739
Joined
Basically Yes.
Really the Cup, Nationwide, and Truck engines are the same basic thing, it's just different carbs/intakes/spacers that make up the big difference.
Really the Cup, Nationwide, and Truck engines are the same basic thing, it's just different carbs/intakes/spacers that make up the big difference.
Legend
Total Posts: 250
Joined 01/28/2009
ok i wasnt sure if a team like roush fenway motors had a diffrent department for truck nwide and cup
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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
Veteran
Total Posts: 101
Joined
The answer is not as simple as “they are basically the same.” Basically the same in NASCAR can get you in trouble. If I understand the question you are asking BigMan88 is, are the engines from NASCAR’s three national touring series different enough to require separate shops or departments for build up? The answer is yes and no.
Yes they are different enough that they require at least segregation if not a totally different shop to build them each. Most of the large engine suppliers build all three series in the same shop, but they have inventory and at times employees and rooms that are segregated from the other engine builders. In order to understand why, you have to know what is different between the three.
A Cup engine has two major differences and a bunch of minor differences from the other two series. One major difference is that a Cup engine is required to run a flat tappet camshaft and Nationwide as well as the Camping World Truck Series run a roller camshaft. ARCA also runs a roller cam and most of the large shops also build for ARCA teams. You should be able to see already why it’s important to have segregated and in some cases totally separate facilities. From the outside all R07 Chevy engines look the same; the last thing you want to do is send a roller R07 engine which was built for Nationwide out the door to a team or the guys on the floor, and have them put it in a Cup car. The other major difference in a Cup engine is the fact that the vast majority of Cup engines are open engines while anything built for Nationwide or the Truck Series is going to be running with some type of restrictor plate; in this case a tapered spacer. ARCA teams run a roller engine, but they do not run a tapered spacer. The science behind creating power with a tapered spacer is different from creating power without a restriction on airflow. What you might select for a cam profile on an open engine might not be so good on a restricted engine.
Some other differences:
1. NW and T have a minimum weight and valve stem size for valves; Cup has no minimum.
2. NW and T only have two approved intake manifolds per manufacture; Cup has four per manufacture again you don’t want to send an R07 engine bound for a Truck team out with a Edelbrock 2878 on it because that is a Cup only manifold.
3. NW and T are allowed only slight rework on intake manifolds; Cup is allowed a bit more.
4. Oil pans in Cup are fairly unrestricted in NW and T you can not run a sealed windage try or baffles and they also have restrictions on the number and size of scavenge tubes you can run.
5. NW and T have restrictions on how much porting and polishing you can do to the heads Cup has limited restrictions on that.
6. The new Dodge P8 head and R6 engine are not eligible for competition in NW or T. The new Ford R500 is also not allowed in competition in NW or T. You can currently run the Chevy SB2 or R07 in all three series. The Dodge P7 and the Ford D3 engines are also eligible for all three series.
7. NW and T crankshafts have a minimum stroke not less than 3.240 inches; Cup has no limitation.
The stuff above is just what I can think of off the top of my head without refreshing my memory from the book. So you can see, on the outside all three series engines may look, “basically the same.” A Dodge P7 engine for Nationwide will look the same on the outside as one for Cup; all the part numbers may even match, but the things on the inside that will get you in trouble with tech can be significantly different. Have your Nationwide engine go thru tech with some lighter weight Cup valves and you will be looking at a fine and probably the lose of some points. So yes all the top engine shops segregate their stuff and in some cases use different people and places to put them together. The three series are different enough that they also pay careful attention to what goes out the door. After all an LT1 and an SB2 are basically 5.7 liter Chevy 350s, but we know they are nothing alike. I hope that helps to answer your question.
Yes they are different enough that they require at least segregation if not a totally different shop to build them each. Most of the large engine suppliers build all three series in the same shop, but they have inventory and at times employees and rooms that are segregated from the other engine builders. In order to understand why, you have to know what is different between the three.
A Cup engine has two major differences and a bunch of minor differences from the other two series. One major difference is that a Cup engine is required to run a flat tappet camshaft and Nationwide as well as the Camping World Truck Series run a roller camshaft. ARCA also runs a roller cam and most of the large shops also build for ARCA teams. You should be able to see already why it’s important to have segregated and in some cases totally separate facilities. From the outside all R07 Chevy engines look the same; the last thing you want to do is send a roller R07 engine which was built for Nationwide out the door to a team or the guys on the floor, and have them put it in a Cup car. The other major difference in a Cup engine is the fact that the vast majority of Cup engines are open engines while anything built for Nationwide or the Truck Series is going to be running with some type of restrictor plate; in this case a tapered spacer. ARCA teams run a roller engine, but they do not run a tapered spacer. The science behind creating power with a tapered spacer is different from creating power without a restriction on airflow. What you might select for a cam profile on an open engine might not be so good on a restricted engine.
Some other differences:
1. NW and T have a minimum weight and valve stem size for valves; Cup has no minimum.
2. NW and T only have two approved intake manifolds per manufacture; Cup has four per manufacture again you don’t want to send an R07 engine bound for a Truck team out with a Edelbrock 2878 on it because that is a Cup only manifold.
3. NW and T are allowed only slight rework on intake manifolds; Cup is allowed a bit more.
4. Oil pans in Cup are fairly unrestricted in NW and T you can not run a sealed windage try or baffles and they also have restrictions on the number and size of scavenge tubes you can run.
5. NW and T have restrictions on how much porting and polishing you can do to the heads Cup has limited restrictions on that.
6. The new Dodge P8 head and R6 engine are not eligible for competition in NW or T. The new Ford R500 is also not allowed in competition in NW or T. You can currently run the Chevy SB2 or R07 in all three series. The Dodge P7 and the Ford D3 engines are also eligible for all three series.
7. NW and T crankshafts have a minimum stroke not less than 3.240 inches; Cup has no limitation.
The stuff above is just what I can think of off the top of my head without refreshing my memory from the book. So you can see, on the outside all three series engines may look, “basically the same.” A Dodge P7 engine for Nationwide will look the same on the outside as one for Cup; all the part numbers may even match, but the things on the inside that will get you in trouble with tech can be significantly different. Have your Nationwide engine go thru tech with some lighter weight Cup valves and you will be looking at a fine and probably the lose of some points. So yes all the top engine shops segregate their stuff and in some cases use different people and places to put them together. The three series are different enough that they also pay careful attention to what goes out the door. After all an LT1 and an SB2 are basically 5.7 liter Chevy 350s, but we know they are nothing alike. I hope that helps to answer your question.
Rookie
Total Posts: 38
Joined 02/16/2009
I guess the greater restrictions for the Nationwide and Truck series are implemented to level the playing field so lower-budget teams in those series can still compete?
Ultimate Insider
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It's mostly so they don't go faster than the COT.
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sorry no politics
Ultimate Insider
Total Posts: 845
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It's mostly so they don't go faster than the COT.
Yes, and yet at some places, they still do (Bristol), hahahaha!
