About to dyno LS1 for first time...
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
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From: St. Paul, MN
About to dyno LS1 for first time... Okay, well I've never dynoed my car, or any car for that matter, but the time has come! Later this week about 4 of us are renting the dyno for about 2 hours. I need tips/tricks to get us on the dyno, strapped down, and running as quick as possible. Also, any general tips/tricks would be very helpful as none of us have run a car yet. I know the guy working there will be of some help, but I'm sure he's not going to bust his @$$ to make it that much quicker/easier!
What kinda estimated power(to the ground) should I have with a trap speed of 107.29?
What kinda estimated power(to the ground) should I have with a trap speed of 107.29?
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
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From: Chi-Town, IL
Re: About to dyno LS1 for first time... Are you an auto or manual?
And doesn't the guy working there have anyone there with him to strap the cars down?? Usually there are about 1-2 strap guys....
Make sure your ready and have everything on the car ready, make sure the temps are good, you have the right amount of oil....and beat the living hell out of it on the way there to get the CPU tricked to add some FUEL... <img src="gr_images/icons/cool.gif" border="0">
And doesn't the guy working there have anyone there with him to strap the cars down?? Usually there are about 1-2 strap guys....
Make sure your ready and have everything on the car ready, make sure the temps are good, you have the right amount of oil....and beat the living hell out of it on the way there to get the CPU tricked to add some FUEL... <img src="gr_images/icons/cool.gif" border="0">
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
Likes: 0
From: St. Paul, MN
Re: About to dyno LS1 for first time... [quote]Originally posted by BIGBOS:
<strong>Are you an auto or manual?
And doesn't the guy working there have anyone there with him to strap the cars down?? Usually there are about 1-2 strap guys....
Make sure your ready and have everything on the car ready, make sure the temps are good, you have the right amount of oil....and beat the living hell out of it on the way there to get the CPU tricked to add some FUEL... <img src="gr_images/icons/cool.gif" border="0"> </strong><hr></blockquote>
I'm not sure if there will be more than one guy helping.
"Make sure I'm ready" What exactly do I have to do to be ready?
"Beat the hell out of it..." Will it still give it that extra fuel if I turn it off while I'm waiting?
<strong>Are you an auto or manual?
And doesn't the guy working there have anyone there with him to strap the cars down?? Usually there are about 1-2 strap guys....
Make sure your ready and have everything on the car ready, make sure the temps are good, you have the right amount of oil....and beat the living hell out of it on the way there to get the CPU tricked to add some FUEL... <img src="gr_images/icons/cool.gif" border="0"> </strong><hr></blockquote>
I'm not sure if there will be more than one guy helping.
"Make sure I'm ready" What exactly do I have to do to be ready?
"Beat the hell out of it..." Will it still give it that extra fuel if I turn it off while I'm waiting?
TECH Senior Member
Joined: Nov 2001
Posts: 11,603
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From: Chi-Town, IL
Re: About to dyno LS1 for first time... By ready I mean have all the mods you want on the car ON THE CAR... <img src="gr_stretch.gif" border="0">
You should put out about 310rwhp I assume, all depends
You should put out about 310rwhp I assume, all depends
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Teching In
Joined: Jan 2002
Posts: 24
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From: Dallas
Re: About to dyno LS1 for first time... It all depends means every car is different. Your trap speed is subject to alot of things, where you ran, what elevation, what were your 60'times, how many times did you run and was this trap speed consistent?
Also what mods do you have on the car?
In addition to the weather, the dyno #'s are also affected by the type of dyno and dyno software used. I have dynoed at three different places. Two of them pull the numbers in my sig, but one of them(the one that has the least technical setup), pulls slightly lower #'s.
Also what mods do you have on the car?
In addition to the weather, the dyno #'s are also affected by the type of dyno and dyno software used. I have dynoed at three different places. Two of them pull the numbers in my sig, but one of them(the one that has the least technical setup), pulls slightly lower #'s.
Re: About to dyno LS1 for first time... first weather will not effect the dyno as the power should be SAE CORRECTED. that is the only thing that matters. actual power does not matter.
second, i, like others, are not into "tricking" the dyno. there are ways to do it with light drivetrane parts, but still, come on! you will not be able to trick the track of the street and you are just lying to yourself and your friends. just go up there as if you were going to race. then you will have an idea of what you need to tune the car. that is what a dyno is for. it is a tuning piece. if you want to dyno race, that is your business. but to see how your car is actually going to perform, you need to run it. shift to 4th and put the pedal to the floor until you bang the rev limiter! you will make the power. cheating 4 or 5 RWHP is lame. you should have over 300. good luck
second, i, like others, are not into "tricking" the dyno. there are ways to do it with light drivetrane parts, but still, come on! you will not be able to trick the track of the street and you are just lying to yourself and your friends. just go up there as if you were going to race. then you will have an idea of what you need to tune the car. that is what a dyno is for. it is a tuning piece. if you want to dyno race, that is your business. but to see how your car is actually going to perform, you need to run it. shift to 4th and put the pedal to the floor until you bang the rev limiter! you will make the power. cheating 4 or 5 RWHP is lame. you should have over 300. good luck
On The Tree
Joined: Dec 2001
Posts: 176
Likes: 0
From: Newtown, PA
Re: About to dyno LS1 for first time... Here is a huge tip for you:
If you have Traction Control, Turn it OFF!!! If not, you are in for a big rude awakening when it engages <img src="gr_stretch.gif" border="0">
Also, when you rev your car up to the rev limiter and let off the gas, DON'T step on the brake. The dyno roller will stop your rear wheels for you, so don't step on your brakes, or else you will risk destroying your brakes.
Also, set your expectations LOW. Too many times I have to pick my friends up off the floor because they are throwing a fit because they believed all the inflated HP numbers that add on parts company post. So be very conservative and if you dyno higher then your low estimate you will be happy. If you assume you will dyno as high as all the add on parts boast, then you will go home and want to drive your car off a bridge..
Good luck on the dyno, and make sure you get SAE corrected numbers and not STD.
If you have Traction Control, Turn it OFF!!! If not, you are in for a big rude awakening when it engages <img src="gr_stretch.gif" border="0">
Also, when you rev your car up to the rev limiter and let off the gas, DON'T step on the brake. The dyno roller will stop your rear wheels for you, so don't step on your brakes, or else you will risk destroying your brakes.
Also, set your expectations LOW. Too many times I have to pick my friends up off the floor because they are throwing a fit because they believed all the inflated HP numbers that add on parts company post. So be very conservative and if you dyno higher then your low estimate you will be happy. If you assume you will dyno as high as all the add on parts boast, then you will go home and want to drive your car off a bridge..
Good luck on the dyno, and make sure you get SAE corrected numbers and not STD.
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
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From: St. Paul, MN
Re: About to dyno LS1 for first time... Okay...I think I've got it now!
Here's one question though, do I just "drive" like normal until I get to 4th, and when I do get there, what RPM should I start the run at?
Also, do I just hit the rev limiter (isn't this bad???) or do I just get off the gas somewhere near it, like 6150?
After I'm done with the pull, do I leave it in gear and let it engine brake, or do I shift it into neutral and let it coast to a stop?
Here's one question though, do I just "drive" like normal until I get to 4th, and when I do get there, what RPM should I start the run at?
Also, do I just hit the rev limiter (isn't this bad???) or do I just get off the gas somewhere near it, like 6150?
After I'm done with the pull, do I leave it in gear and let it engine brake, or do I shift it into neutral and let it coast to a stop?
On The Tree
Joined: Dec 2001
Posts: 176
Likes: 0
From: Newtown, PA
Re: About to dyno LS1 for first time... Drive really slow until you get to forth.. Then look over at the guy with the remote control for the dyno machine. When he gives you the ok, stomp on the gas and bring it up to the rev limiter. You don't have to hit the rev limiter, but some do to see if they make any power on the top end. It isn't good to constantly hit the rev limiter, but it won't hurt anything, that is what it is there for.
Also you want to start your dyno around 2,000 RPM or so, then stomp on it once the dyno machine starts logging.
When you are done your pull, put it in neutral and let the dyno stop your rear wheels for you. That is the safest bet. You don't want to let your car engine break against all that mass spinning on the dyno wheel.
Good luck with your dyno. Let us know how you did.
One thing to let you know. Since this is your first time dynoing, some places won't let you be the one to drive your car on the dyno for insurance reasons. But if you get to drive your car on the dyno, you will be scared crapless the first time. You will be going over 100 mph and yet standing still with your friends standing next to your car <img src="gr_stretch.gif" border="0"> It will really freak you out a little the first time. However, the fear will pass and the next couple runs will be pure adrenaline <img src="gr_stretch.gif" border="0">
Good luck,
Dan
Also you want to start your dyno around 2,000 RPM or so, then stomp on it once the dyno machine starts logging.
When you are done your pull, put it in neutral and let the dyno stop your rear wheels for you. That is the safest bet. You don't want to let your car engine break against all that mass spinning on the dyno wheel.
Good luck with your dyno. Let us know how you did.
One thing to let you know. Since this is your first time dynoing, some places won't let you be the one to drive your car on the dyno for insurance reasons. But if you get to drive your car on the dyno, you will be scared crapless the first time. You will be going over 100 mph and yet standing still with your friends standing next to your car <img src="gr_stretch.gif" border="0"> It will really freak you out a little the first time. However, the fear will pass and the next couple runs will be pure adrenaline <img src="gr_stretch.gif" border="0">
Good luck,
Dan
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
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From: St. Paul, MN
Re: About to dyno LS1 for first time... I actually will be the one to drive my car on it!!! I can't wait...I can't sleep at night trying to figure out what my car will run! As long as its over 305 I'll be more than happy. Actually, I really don't even care what it pulls, I have one of the fastest cars in the frozen tundra (that I've come across, I know there's many that are faster!!!) so I don't care, if mine's faster, it's probably got more ***** than theres...because I can guarantee it's not because it's lighter!
Launching!
Joined: Nov 2001
Posts: 260
Likes: 0
From: Minneapolis, MN
Re: About to dyno LS1 for first time... Hey man where are you getting your car dyno'd? at John Hayley motorsports? Who else is going? I might go as well to see if the additional mileage has givin me any gains.
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
Likes: 0
From: St. Paul, MN
Re: About to dyno LS1 for first time... Hell yeah...this is what I'm talking about! Do you frequent MNFbody.com...if so look for my post in the lounge! I'm looking for some people to come with us to see if we can get a discount!
TECH Resident
Joined: Jan 2002
Posts: 754
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From: USA
Re: About to dyno LS1 for first time... Being that the powertrain performs as how the PCM has calibrated to how the car has been driven, you either expect the 1st couple of dyno runs report a bit lower in results or, for a few days before going to the dyno, push the car harder and let then PCM adjust better for WOT conditions.
Assure your tire pressures are correct or a tad higher, less rolling resistance, better results.
Try and keep the engine temps constant so that you get close results from one run to the other.
Don't let the temps get too cold, get close to normal temps.
Use a good grade of gas.
If you can, insist for the money your paying that the shop has a good fan that is moving air into
radiator area so that your IAT temps are normal as on the street.
I'd shoot for going to just under redline, some dyno shops tell you to lift off g-pedal around 5,800 RPMs.
It's my money so when they say lift, I go to 6,500 RPMs( since 6600 is my redline)
John
[quote]Originally posted by Jacobi:
<strong>Okay, well I've never dynoed my car, or any car for that matter, but the time has come! Later this week about 4 of us are renting the dyno for about 2 hours. I need tips/tricks to get us on the dyno, strapped down, and running as quick as possible. Also, any general tips/tricks would be very helpful as none of us have run a car yet. I know the guy working there will be of some help, but I'm sure he's not going to bust his @$$ to make it that much quicker/easier!
What kinda estimated power(to the ground) should I have with a trap speed of 107.29?</strong><hr></blockquote>
Assure your tire pressures are correct or a tad higher, less rolling resistance, better results.
Try and keep the engine temps constant so that you get close results from one run to the other.
Don't let the temps get too cold, get close to normal temps.
Use a good grade of gas.
If you can, insist for the money your paying that the shop has a good fan that is moving air into
radiator area so that your IAT temps are normal as on the street.
I'd shoot for going to just under redline, some dyno shops tell you to lift off g-pedal around 5,800 RPMs.
It's my money so when they say lift, I go to 6,500 RPMs( since 6600 is my redline)
John
[quote]Originally posted by Jacobi:
<strong>Okay, well I've never dynoed my car, or any car for that matter, but the time has come! Later this week about 4 of us are renting the dyno for about 2 hours. I need tips/tricks to get us on the dyno, strapped down, and running as quick as possible. Also, any general tips/tricks would be very helpful as none of us have run a car yet. I know the guy working there will be of some help, but I'm sure he's not going to bust his @$$ to make it that much quicker/easier!
What kinda estimated power(to the ground) should I have with a trap speed of 107.29?</strong><hr></blockquote>
Thread Starter
Launching!
Joined: Nov 2001
Posts: 220
Likes: 0
From: St. Paul, MN
Re: About to dyno LS1 for first time... [quote]Originally posted by gator's 99TA:
<strong>first weather will not effect the dyno as the power should be SAE CORRECTED. that is the only thing that matters. actual power does not matter.
second, i, like others, are not into "tricking" the dyno. there are ways to do it with light drivetrane parts, but still, come on! you will not be able to trick the track of the street and you are just lying to yourself and your friends. just go up there as if you were going to race. then you will have an idea of what you need to tune the car. that is what a dyno is for. it is a tuning piece. if you want to dyno race, that is your business. but to see how your car is actually going to perform, you need to run it. shift to 4th and put the pedal to the floor until you bang the rev limiter! you will make the power. cheating 4 or 5 RWHP is lame. you should have over 300. good luck</strong><hr></blockquote>
Gator:
I guess I worded it WAY wrong...I don't want to cheat by any means! I'm not in to throwing out numbers, if anything I'll tell people my car runs 14's just to surprise them! I was just asking about tips/tricks because I've never seen or actually done a dyno on any car!
How low of rpm's should I be when I start the run in 4th?
<strong>first weather will not effect the dyno as the power should be SAE CORRECTED. that is the only thing that matters. actual power does not matter.
second, i, like others, are not into "tricking" the dyno. there are ways to do it with light drivetrane parts, but still, come on! you will not be able to trick the track of the street and you are just lying to yourself and your friends. just go up there as if you were going to race. then you will have an idea of what you need to tune the car. that is what a dyno is for. it is a tuning piece. if you want to dyno race, that is your business. but to see how your car is actually going to perform, you need to run it. shift to 4th and put the pedal to the floor until you bang the rev limiter! you will make the power. cheating 4 or 5 RWHP is lame. you should have over 300. good luck</strong><hr></blockquote>
Gator:
I guess I worded it WAY wrong...I don't want to cheat by any means! I'm not in to throwing out numbers, if anything I'll tell people my car runs 14's just to surprise them! I was just asking about tips/tricks because I've never seen or actually done a dyno on any car!
How low of rpm's should I be when I start the run in 4th?