First Dyno Pull, need a few tips
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TECH Apprentice
Joined: Jan 2013
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From: Mishawaka, IN
First Dyno Pull, need a few tips So May 18th I will be going to a dyno shop that is holding a special of $50 for 3 dyno pulls.
Neither I nor my car have ever been to a dyno shop before, I'm not fully sure what to expect.
My car has almost exactly 100,000 miles on it, it's an auto with a few minor bolt on's. Is there anything I should be worried about? Anything I should check on before putting it on the dyno? Any major risks?
I've seen dyno accidents before where the car will jet off the dyno, but I'm going to presume that's pretty rare, and $50 for 3 pulls sounds insanely cheap to me.
Also, anyone have any ideas on numbers it will produce? It's an A4 with P&P TB, lid, and cat-back. I'm hoping for 290-310WHP.
Neither I nor my car have ever been to a dyno shop before, I'm not fully sure what to expect.
My car has almost exactly 100,000 miles on it, it's an auto with a few minor bolt on's. Is there anything I should be worried about? Anything I should check on before putting it on the dyno? Any major risks?
I've seen dyno accidents before where the car will jet off the dyno, but I'm going to presume that's pretty rare, and $50 for 3 pulls sounds insanely cheap to me.
Also, anyone have any ideas on numbers it will produce? It's an A4 with P&P TB, lid, and cat-back. I'm hoping for 290-310WHP.
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check you plugs and wires ,and replace them if they aren't in good shape.clean your MAF ,and IAC.do a oil change ,and tranny fluid.and check your O2 sensors before to make sure they are working great.check your rear tire pressure .
Thread Starter
TECH Apprentice
Joined: Jan 2013
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From: Mishawaka, IN
Yeah, I probably need to do a plugs and wires change, think they're about due. Thanks for the advice.
If it breaks 285WHP I'll be a happy camper, if it breaks 300WHP I'll be singing.
If it breaks 285WHP I'll be a happy camper, if it breaks 300WHP I'll be singing.
HP numbers dont really mean all that much. a 300whp car can run a solid 13 and another 300whp car can run a 12.5 track times are what shows a cars true capability, i wouldnt get to worked up over dyno numbers.
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TECH Apprentice
Joined: Jan 2013
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From: Mishawaka, IN
If you have two cars with the exact same WHP numbers and they are running over a .5 second difference in 1/4 mile times, there is either something wrong mechanically with the car or the driver, that's a huge time difference.
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No, track times are a result of a car's true capability. WHP numbers show what a car's capability is.
If you have two cars with the exact same WHP numbers and they are running over a .5 second difference in 1/4 mile times, there is either something wrong mechanically with the car or the driver, that's a huge time difference.
If you have two cars with the exact same WHP numbers and they are running over a .5 second difference in 1/4 mile times, there is either something wrong mechanically with the car or the driver, that's a huge time difference.
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Joined: Jan 2013
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From: Mishawaka, IN
Two cars that are putting out the exact same WHP number both run at a track on the same day by drivers of the exact same skill set, not saying the times will be the same down to the hundredth of a second, but they should NOT be .5 seconds off.
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Do your plugs and wires. Oil change would be a must and check the rest of your fluids. Just make sure they are not in a hurry and strap down all four corners. Most will try to get a few more clicks on the straps after the tires get rolling. Just dont be the first one on and watch a few first. Just go have fun and watch! Hopefully they will have some cars that put some big numbers up! Those are the fun ones to watch!
But we aren't discussing those possibilities.
Two cars that are putting out the exact same WHP number both run at a track on the same day by drivers of the exact same skill set, not saying the times will be the same down to the hundredth of a second, but they should NOT be .5 seconds off.
Two cars that are putting out the exact same WHP number both run at a track on the same day by drivers of the exact same skill set, not saying the times will be the same down to the hundredth of a second, but they should NOT be .5 seconds off.
I just got mine dynoed for the first time yesterday. 314/324 to the wheels with just a lid and cat-back through an A4. I was hoping for a solid 300 so I'm really happy with those numbers. You should be right about where I am or higher since you got the p&p tb too.
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From: Mishawaka, IN
So if the car goes off the dyno and crashes or something, who's liable? They must make you sign a release or something right, so that they aren't liable for accidents? And insurance probably won't cover it either.
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From: Westminster, MD
FWIW I dynoed 326rwhp 322rwtq, setup should be in the sig but if it's changed, at the time, FTI SRLS3391 billet converter (3500 stall speed, 2.35 STR) w/ Hayden cooler, ARH 1 7/8" headers to ARH ORY and Borla catback and SLP lid, very minor suspension (LCA, PHB, STB).
But we aren't discussing those possibilities.
Two cars that are putting out the exact same WHP number both run at a track on the same day by drivers of the exact same skill set, not saying the times will be the same down to the hundredth of a second, but they should NOT be .5 seconds off.
Two cars that are putting out the exact same WHP number both run at a track on the same day by drivers of the exact same skill set, not saying the times will be the same down to the hundredth of a second, but they should NOT be .5 seconds off.
The liability waver they make you sign is in case of anything fails on the vehicle (engine, rear end, etc) you are out of luck. The last one I did, I had to tell them what operating range the car had to be dyno'd at and they stayed in that range.
For a car to fly off the dyno, one of a few things have to occur, either a car was not strapped properly, vehicle was not on the rollers correctly, or someone hit the brakes while the rollers are spinning. There could be more ways, but Im not going to get into that. I watched a dumbass in South Florida hit the brakes after they told him to abort the run and it snapped one of the straps sending the car off the dyno and into a lift. The owner of the vehicle insisted on doing the pulls himself so he had no one to blame and he was responsible for all damages. Couldnt have happened to a bigger tool and his bigger tool of a wife. I was all smiles that day.
Now, if they were doing everything, their insurance company might have to pay. Being that its a dyno there might be gray area for the insurance company to wiggle out. Either way, them or the shop should pay to have your car fixed if your car flys off the dyno from their negligence.
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From: Schiller Park, ILL Member: #317
Actually, I would go so far as to say that even 1 full second of difference would not be out of line for two cars with the same RWHP number.
- differences in vehicle weight
- converter stall speed and/or gear ratio (both trans & diff)
- tires and suspension setup
- the aforementioned differences in weather
....all combined could make a drastic difference in ET between two cars of the same rwhp level.
Off topic but RPM do you think its possible for a bone stock car w/ lid and cat back to break 11s without doing any sort of power mods and just a converter, tire, gears, weight reduction, and suspension??? im kind of curious about that now lol
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From: Westminster, MD
I'm sure it's possible. lid, catback, 3.73 gears, slicks or very good DRs, 3800-4400 stall, totally stripped interior, and suspension. High 11's would probably be a attainable.