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Topic: Most powerful sprint engine?
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Page 2 of 2 of 34 replies
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December 18, 2014 at
10:32:19 AM
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Funny everyone always says how much HP my Engine makes on the dyno. HP is calulated off of how much torque the Engine puts out. So you need to look at how much and where the torque range of you motor is at.
HP = TxN/ 5252
T = Torque ftlb
N = Newtons(RPM) speed
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December 18, 2014 at
02:24:36 PM
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Usable torque is all that matters in book. You want the grunt to get to the ground. Some rice burner shitboxes make a lot of impressive HP numbers these days but cant pull their own pecker out of a mud hole due to a lack of torque. If you have to spin your motor at 9,000 rpm to make torque your screwed in circle track racing. I would want something that has drive OFF the corner more than anything else.
Cheers!
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December 18, 2014 at
02:56:01 PM
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Reply to:
Posted By: henry chinaski on December 18 2014 at 02:24:36 PM
Usable torque is all that matters in book. You want the grunt to get to the ground. Some rice burner shitboxes make a lot of impressive HP numbers these days but cant pull their own pecker out of a mud hole due to a lack of torque. If you have to spin your motor at 9,000 rpm to make torque your screwed in circle track racing. I would want something that has drive OFF the corner more than anything else.
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While I don't disagree about the usable torque, I do have a question. Maybe Kelly can chime in too. Why are motors turning more and more RPMs today? 9000 is not uncommon for outlaw motors and even a lot of ASCS motors. Sprint Cup motors routinely turn over 9000 an entire 500 mile race. It takes a lot of good parts to do that plus those parts don't last very long. The equates to high cost. If turning higher RPMs wasn't an advantage why is everyone doing it? Thanks, I hang up and listen.
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December 18, 2014 at
03:26:23 PM
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An engine is an air pump the more air you move through it the bigger it is, More rpm equals power.
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December 18, 2014 at
09:36:53 PM
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Reply to:
Posted By: MoOpenwheel on December 18 2014 at 02:56:01 PM
While I don't disagree about the usable torque, I do have a question. Maybe Kelly can chime in too. Why are motors turning more and more RPMs today? 9000 is not uncommon for outlaw motors and even a lot of ASCS motors. Sprint Cup motors routinely turn over 9000 an entire 500 mile race. It takes a lot of good parts to do that plus those parts don't last very long. The equates to high cost. If turning higher RPMs wasn't an advantage why is everyone doing it? Thanks, I hang up and listen.
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Mo simply put it's "monkey see monkey do." Most people say it's so the car will pull off the corner or to keep their corner speed up.
You are correct that the parts don't last as long and quite simply aren't designed for such rpm's hence that's a leading cause for many engines expiring. But that's the nature of the game these days.
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December 18, 2014 at
10:02:16 PM
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Reply to:
Posted By: chance2195 on December 17 2014 at 02:47:34 PM
Griff, Hampshire & Fisher are getting >950 HP @ > $ 70,000.00 each. 900 - 950 HP $ 40,000.00 to $ 50,000.00.
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Fisher's best engine this year was going for 45K not 70K.
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December 26, 2014 at
11:58:12 AM
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Reply to:
Posted By: MoOpenwheel on December 18 2014 at 02:56:01 PM
While I don't disagree about the usable torque, I do have a question. Maybe Kelly can chime in too. Why are motors turning more and more RPMs today? 9000 is not uncommon for outlaw motors and even a lot of ASCS motors. Sprint Cup motors routinely turn over 9000 an entire 500 mile race. It takes a lot of good parts to do that plus those parts don't last very long. The equates to high cost. If turning higher RPMs wasn't an advantage why is everyone doing it? Thanks, I hang up and listen.
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I use shorter gearing to help me control the attitude of the car and come off the corner. However, given the nature of the rules package I'm under, 8k is a LOT of RPM so take it with a grain of salt.
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December 26, 2014 at
12:24:50 PM
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Reply to:
Posted By: MoOpenwheel on December 18 2014 at 02:56:01 PM
While I don't disagree about the usable torque, I do have a question. Maybe Kelly can chime in too. Why are motors turning more and more RPMs today? 9000 is not uncommon for outlaw motors and even a lot of ASCS motors. Sprint Cup motors routinely turn over 9000 an entire 500 mile race. It takes a lot of good parts to do that plus those parts don't last very long. The equates to high cost. If turning higher RPMs wasn't an advantage why is everyone doing it? Thanks, I hang up and listen.
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It also equates to gearing as well. If you can get a higher numerically gear ratio then the engine needs less low end to propel it off the corner to reach maximum operating speeds. Their thought is that higher rpm is a benefit when you can run a higher gear. Torque is made usually by increasing displacement. Camshaft and cylinder head characteristics also play into it as well.
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January 23, 2015 at
03:37:02 AM
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Reply to:
Posted By: aussieaussieaussie on December 16 2014 at 03:32:08 PM
What's the best open 410 around right now?
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I heard of a stock car FIFA 15 Coins motor that was dynoed at 2 diff, places and it had 40 hp less at the second dyno.
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January 23, 2015 at
10:22:02 AM
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Posted By: parrisisland on December 18 2014 at 06:25:56 AM
Those prices are the reason alot of locals can't "race for the fun of it" anymore. Then you get fuck heads like Schatz and Saldana.
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You can either race for fun or you can race to win. Both can coexist on the same track but most guys have chosen which they want to do. If you want to race to win, bring your checkbook or figure out how to build equipment that is the same as the big dogs pay for, and build it for half in your own shop. Professional racers like the 2 you mentioned aren't out there to have fun on the weekend, they do it as their career and to be in that class your out there to win.
http://gph.is/XMLGff
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January 23, 2015 at
03:25:04 PM
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Reply to:
Posted By: Dhowe11164 on December 16 2014 at 05:40:09 PM
Speedway Engines, but those arent really available to just anyone. Based on what is available, i'd throw out there Ott, Capetta and Rider based on their use in PA and Kistler also has their share of front runners.
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ditto on that one. i believe kkr has the exclusive..
Ascot was the greatest of all time..
West Capital wasn't half bad either..
Life is good...
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January 23, 2015 at
04:37:58 PM
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Maybe I heard wrong, but I thought they said during the World Finals coverage that KKR was switching from Speedway to Capetta motors for 2015.
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January 23, 2015 at
06:11:58 PM
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Vic Hill, Late Models or Sprints
Lawlessness + liberalism = HELL - NYC, Detroit, Chicago,
Seattle, LA Who the H runs those cities.
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January 23, 2015 at
09:34:19 PM
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Hey Aussie Aussie Aussie !
I attend races regularly at Sydney Speedway and I have also attended races at Mount Gambier, SA and Warrnambool, VIC. If you are thinking about the tracks in Australia, having 900+ HP at 8500 RPM will probably not be very useful. We don't have big 1/2 mile tracks like Knoxville Raceway here. Our tracks are relatively short and they are not steeply banked. I believe that good mid-RPM performance with smooth throttle response is more useful than brute horsepower at peak RPM on the tracks here. Just my 2 cents worth.
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January 23, 2015 at
10:09:36 PM
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Reply to:
Posted By: JDracer on January 23 2015 at 09:34:19 PM
Hey Aussie Aussie Aussie !
I attend races regularly at Sydney Speedway and I have also attended races at Mount Gambier, SA and Warrnambool, VIC. If you are thinking about the tracks in Australia, having 900+ HP at 8500 RPM will probably not be very useful. We don't have big 1/2 mile tracks like Knoxville Raceway here. Our tracks are relatively short and they are not steeply banked. I believe that good mid-RPM performance with smooth throttle response is more useful than brute horsepower at peak RPM on the tracks here. Just my 2 cents worth.
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The motor you described will run its butt off on your tracks,you just put more gear in it to keep it in it's rpm range.
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