I am really disappointed
Melting Slicks
Joined: Sep 2006
Posts: 2,034
Likes: 0
From: Beaverton OR
I don't think I've seen this many threads on one forum about "dyno numbers" since I logged on the supra forum.
Go run your car, and let us know what it runs. Dyno numbers are for garage queens. The only number you should be concerned about when dyno'ing is the A/F.
Go run your car, and let us know what it runs. Dyno numbers are for garage queens. The only number you should be concerned about when dyno'ing is the A/F.
Horsepower does not necessarily correlate to to a faster time at the dragstrip because of the multitude of variables associated with a given race on a given night at a given track with a given driver.
SOTP method is a completely subjective measurement which can be impacted by the emotional state of the driver.
The Dyno takes most of the variables out of the mix and allows one to compare "apples to apples," particularly if the comparisons are done on the same dyno. Even though the dyno cannot "perfectly" match real world conditions, used correctly, it is the best tool available to objectively measure horsepower and the impact of a specific modification on a specific engine.
Drifting
Joined: Feb 2005
Posts: 1,321
Likes: 0
From: Catonsville MD
Not to start a pissing match, but that comment really is silly. The only way to OBJECTIVELY analyze the impacts of the various engine modifications that can be made, one must use the most consistant tool available. Contrary to popular belief, it is neither the 1/4 mile timeslip, nor the SOTP method.
Horsepower does not necessarily correlate to to a faster time at the dragstrip because of the multitude of variables associated with a given race on a given night at a given track with a given driver.
SOTP method is a completely subjective measurement which can be impacted by the emotional state of the driver.
The Dyno takes most of the variables out of the mix and allows one to compare "apples to apples," particularly if the comparisons are done on the same dyno. Even though the dyno cannot "perfectly" match real world conditions, used correctly, it is the best tool available to objectively measure horsepower and the impact of a specific modification on a specific engine.
Horsepower does not necessarily correlate to to a faster time at the dragstrip because of the multitude of variables associated with a given race on a given night at a given track with a given driver.
SOTP method is a completely subjective measurement which can be impacted by the emotional state of the driver.
The Dyno takes most of the variables out of the mix and allows one to compare "apples to apples," particularly if the comparisons are done on the same dyno. Even though the dyno cannot "perfectly" match real world conditions, used correctly, it is the best tool available to objectively measure horsepower and the impact of a specific modification on a specific engine.
But the point is that all SOME people on here seem to care about is the peak numbers. If you are objectively analyzing your dyno charts, that's another argument. But to be upset because your peak is down 5hp over another guy, who freakin cares. You can't compare dyno's, every single one is different.
Like you said, for one person seeking to see what each mod does, fine, for me, it's not about HP numbers, but driveability and ET. I could care less how much hp my car makes. AFR isn't going to give you a discount if your car makes 6 less HP than they advertise. Now if you are getting on the dyno and steady tuning and pulling out HP, that's where the dyno is useful, but as a bragging right, who cares. HP doesn't ALWAYS win races.
Last edited by Waveblaster785; Mar 12, 2007 at 11:25 PM.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
No, didn't miss them at all, that's why I didn't mention them in the list of items that I felt don't really show on the dyno.
I did also agree that I thought his numbers were low regardless.
Where did you even get the impression that I missed that he had headers?
I did also agree that I thought his numbers were low regardless.
Where did you even get the impression that I missed that he had headers?
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
But the point is that all SOME people on here seem to care about is the peak numbers. If you are objectively analyzing your dyno charts, that's another argument. But to be upset because your peak is down 5hp over another guy, who freakin cares. You can't compare dyno's, every single one is different.
Like you said, for one person seeking to see what each mod does, fine, for me, it's not about HP numbers, but driveability and ET. I could care less how much hp my car makes. AFR isn't going to give you a discount if your car makes 6 less HP than they advertise. Now if you are getting on the dyno and steady tuning and pulling out HP, that's where the dyno is useful, but as a bragging right, who cares. HP doesn't ALWAYS win races.
Like you said, for one person seeking to see what each mod does, fine, for me, it's not about HP numbers, but driveability and ET. I could care less how much hp my car makes. AFR isn't going to give you a discount if your car makes 6 less HP than they advertise. Now if you are getting on the dyno and steady tuning and pulling out HP, that's where the dyno is useful, but as a bragging right, who cares. HP doesn't ALWAYS win races.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
But the point is that all SOME people on here seem to care about is the peak numbers. If you are objectively analyzing your dyno charts, that's another argument. But to be upset because your peak is down 5hp over another guy, who freakin cares. You can't compare dyno's, every single one is different.
Like you said, for one person seeking to see what each mod does, fine, for me, it's not about HP numbers, but driveability and ET. I could care less how much hp my car makes. AFR isn't going to give you a discount if your car makes 6 less HP than they advertise. Now if you are getting on the dyno and steady tuning and pulling out HP, that's where the dyno is useful, but as a bragging right, who cares. HP doesn't ALWAYS win races.
Like you said, for one person seeking to see what each mod does, fine, for me, it's not about HP numbers, but driveability and ET. I could care less how much hp my car makes. AFR isn't going to give you a discount if your car makes 6 less HP than they advertise. Now if you are getting on the dyno and steady tuning and pulling out HP, that's where the dyno is useful, but as a bragging right, who cares. HP doesn't ALWAYS win races.
100% If dyno graph results/numbers were truly that critical (and accurate) then the bolt on car that dynos 385rwhp would beat the one that dynos 370rwhp (both cars being of the same transmission, tires and driver) EVERY time but that of course isn't the case. Dyno numbers can be manipulated by playing with A/F mixtures and timing and can cause a vehicle to suddenly read up to 20+ (unsafe) horsepower higher.
As stated earlier, the better tune is not necessarily the one that simply dynos higher.
Race Director
Joined: Apr 2005
Posts: 10,436
Likes: 4
From: Everett Wa
100% If dyno graph results/numbers were truly that critical (and accurate) then the bolt on car that dynos 385rwhp would beat the one that dynos 370rwhp (both cars being of the same transmission, tires and driver) EVERY time but that of course isn't the case. Dyno numbers can be manipulated by playing with A/F mixtures and timing and can cause a vehicle to suddenly read up to 20+ (unsafe) horsepower higher.
As stated earlier, the better tune is not necessarily the one that simply dynos higher.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
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Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
LS1Lt1, you know what i'm talking about.....still amazed by your stock 1/4 numbers I think either the install did something screwy to this guy's car or the tuner is leaving a ton on the table.
Thread Starter
Racer
Joined: Jan 2006
Posts: 409
Likes: 1
From: Charlotte NC
QUOTE=mlongo99;1559335463]You have no baseline run to make any comparison. All this shows is the difference that the tune made, you have no data about your car when it was stock. Now every car is different, but the all are close to 400hp. Do you really think that your car is only making 8hp more than when it was totally stock? If is was, you wouldn't even feel a difference. For all you know, the dyno could be way out of calibration. Did you see any other C6s run on that dyno that day?[/QUOTE]
The baseline with Vararam, LG headers, ported intake and Magnaflow catback was 342HP/353TQ. Awful.
http://i115.photobucket.com/albums/n...eDynoSheet.jpg
The baseline with Vararam, LG headers, ported intake and Magnaflow catback was 342HP/353TQ. Awful.
http://i115.photobucket.com/albums/n...eDynoSheet.jpg
Last edited by BC Bob; Mar 13, 2007 at 09:35 AM.
Safety Car
Joined: Dec 2006
Posts: 4,895
Likes: 0
From: Monterey California
They didnt even have baselines from any other C6s to show you on that dyno?.. tells me that they dont really have experience with this car. My previous car had been down on power before at a shop... they showed me 20 other cars they had tuned.. despite their great rep. they couldnt tell me what was wrong with the car. Another car found the problem (slipped timing chain) and I gained 100whp over the baseline that I re dynoed there in 1 day.
This is why I love dyno days! Really good for bench marking to make sure your tuner is doing a good enough job. It wouldnt suprise me if they just put a simple flash on your car and really didnt tune the thing from scratch.
This is why I love dyno days! Really good for bench marking to make sure your tuner is doing a good enough job. It wouldnt suprise me if they just put a simple flash on your car and really didnt tune the thing from scratch.
Thread Starter
Racer
Joined: Jan 2006
Posts: 409
Likes: 1
From: Charlotte NC
I spoke with another reputable tuner in Durham, NC. He's done over 1,200 LS2's and he did say that my numbers were about 35-40HP too low. Looks like I'll be visiting him in a few weeks.
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
The only comparable dynos were from GTO's. Looks like he's never dynoed an LS2 Corvette.
I spoke with another reputable tuner in Durham, NC. He's done over 1,200 LS2's and he did say that my numbers were about 35-40HP too low. Looks like I'll be visiting him in a few weeks.
I spoke with another reputable tuner in Durham, NC. He's done over 1,200 LS2's and he did say that my numbers were about 35-40HP too low. Looks like I'll be visiting him in a few weeks.
Safety Car
Joined: Dec 2006
Posts: 4,895
Likes: 0
From: Monterey California
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
If as you say, that's a little low, please tell me what do you think it should be?
Last edited by AORoads; Mar 13, 2007 at 01:15 PM.
Racer
Joined: Nov 2006
Posts: 319
Likes: 0
From: Morgan Hill CA
St. Jude Donor '09
Just tuned
I just had my 07 C6 Z51 mn 6 dyno tuned this weekend. Rick at Synergy installed a Hurricane air intake I brought him and my Torque=381.5 and HP=380.4. Everything else is completely stock. He tuned for wide band of torque. I am very pleased with these results.
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Safety Car
Joined: Dec 2006
Posts: 4,895
Likes: 0
From: Monterey California
I will be up there next month..
Safety Car
Joined: Dec 2006
Posts: 4,895
Likes: 0
From: Monterey California
I saw the dyno vid of your car, and sounds like he has done some nice work
Le Mans Master
Joined: Oct 2005
Posts: 5,052
Likes: 889
From: Tampa Florida
Was those numbers corrected? The results appear extremely high without headers.