2000 SS Performance - Disappointing Numbers (Track & Dyno)???
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2000 SS Performance - Disappointing Numbers (Track & Dyno)??? I was wondering if anyone could explain my dyno numbers.
With lid, SLP Loudmouth, clogged cats and 3.73's being my primary modifications I dyno'ed at 312/320 this is a 2000 A4 SS by the way.
Then I added a YANK ST3500, gutted cats and SLP MAF and horsepower went down to 305 and torque increased to 360.
Then I added a Moser 12 bolt with 30 spline axles and 3.42 gears. Added FTRA, MAF Ends (SLP MAF didn't agree with the car) and found that horsepower dropped to 292 and torque stayed similar at 365.
My track numbers are a best of 12.80 @ 106.7 and that is in Phoenix AZ at 1200ft of altitude so I know they would be somewhat better at lower altitude but I'm still feeling somewhat disappointed with both dyno and track numbers.
Is my disappointment justified or am I right about where I should be?
[ EDIT ] The dyno numbers are SAE corrected. And my complete list of modifications are at http://members.fbody.com/2000pewterss/ssmods.html
<small>[ March 18, 2002, 11:51 AM: Message edited by: monSSter1191 ]</small>
With lid, SLP Loudmouth, clogged cats and 3.73's being my primary modifications I dyno'ed at 312/320 this is a 2000 A4 SS by the way.
Then I added a YANK ST3500, gutted cats and SLP MAF and horsepower went down to 305 and torque increased to 360.
Then I added a Moser 12 bolt with 30 spline axles and 3.42 gears. Added FTRA, MAF Ends (SLP MAF didn't agree with the car) and found that horsepower dropped to 292 and torque stayed similar at 365.
My track numbers are a best of 12.80 @ 106.7 and that is in Phoenix AZ at 1200ft of altitude so I know they would be somewhat better at lower altitude but I'm still feeling somewhat disappointed with both dyno and track numbers.
Is my disappointment justified or am I right about where I should be?
[ EDIT ] The dyno numbers are SAE corrected. And my complete list of modifications are at http://members.fbody.com/2000pewterss/ssmods.html
<small>[ March 18, 2002, 11:51 AM: Message edited by: monSSter1191 ]</small>
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? I ran a best of 12.03 @ 113 with bolt-ons and the ST 3500 in some negative DA air. My car never dynoed over 320 HP including headers and ORP.
The best thing to do is run at the track with a group of guys so you can compare ET & MPH and see if you're really down on power. Any of your friends dyno at the same place so that you could get a comparison?
The best thing to do is run at the track with a group of guys so you can compare ET & MPH and see if you're really down on power. Any of your friends dyno at the same place so that you could get a comparison?
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? 90% of my friends have 6-speeds the only other autos have nothing near what I have done. The 6-speeds mostly dyno around 330-340 with Lid, MAF & Cat-back. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
I am running consistently faster than all the 6-speeds at the track however by usually half to a full second.
I am running consistently faster than all the 6-speeds at the track however by usually half to a full second.
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? All dyno pulls both with my car and with my friend's were all on the same dyno which is NOT a Mustang dyno (known for low numbers) it was on a high model Dynojet.
And the best 60' to date is a 1.751 on BF Goodrich Comp TA Drag Radials.
And the best 60' to date is a 1.751 on BF Goodrich Comp TA Drag Radials.
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? Wonder if tq management is biting you. Like Ragtop 99 said....compare times with people at your track. Different temp/altitude etc make it really impossible to compare times with people in other states. Do you have Autotap? Maybe you are seeing some KR..running lean/rich.
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? What tires are you on? The track times could be ok if you have bad 60s and it was warm that day.
I think your dyno #s are within the average of other LS1s with those mods. Convertors will make you lose a little hp. That 360 rear wheel torque is probably a spike from the convertor.
I think your dyno #s are within the average of other LS1s with those mods. Convertors will make you lose a little hp. That 360 rear wheel torque is probably a spike from the convertor.
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? Your times and numbers sound about right from what i have seen my car do and others around me. Your torque is likely to be closer to 400rwtq though, its hard to get the dyno to read it. Thats kinda why your are running those 12.8's from the the torque, not the horsepower. The gears do hurt HP as well does the rear and converter. But the converter helps cancel that out with the outrageous torque!! <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
I have everything but heads and cam on my car. Every bolt on and what not and only pulled like 327hp on the dyno. And only ran a best of 12.7 at the time. But my car is weighing almost 3800lbs. I just recently added the ls6 intake and picked up 3mph and ran a new best of 12.6's. So if i had to guess my HP should be around 340 now or close to it from the intake mod.
So to sum it up for ya, your doing great, since you got most of the mods done that actually kill HP, just wait til you add headers and cam. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
Good Luck modding and have fun!!
There will always be someone slower and faster!!
By the way, my car is a 2000 SS A4 as well. So I know where your coming from. I was thinking along the same lines as you were in the beginning!!
Jason
I have everything but heads and cam on my car. Every bolt on and what not and only pulled like 327hp on the dyno. And only ran a best of 12.7 at the time. But my car is weighing almost 3800lbs. I just recently added the ls6 intake and picked up 3mph and ran a new best of 12.6's. So if i had to guess my HP should be around 340 now or close to it from the intake mod.
So to sum it up for ya, your doing great, since you got most of the mods done that actually kill HP, just wait til you add headers and cam. <img border="0" title="" alt="[Eek!]" src="gr_eek2.gif" />
Good Luck modding and have fun!!
There will always be someone slower and faster!!
By the way, my car is a 2000 SS A4 as well. So I know where your coming from. I was thinking along the same lines as you were in the beginning!!
Jason
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? I have autotap and I've run tests many times and found minimalistic amounts of knock retard varying on what MAF I had in there. With an SLP MAF varying around 3 degrees at some points, with ported ends or stock ends, usually less than a whole degree if at all... so that can't be my problem.
I don't know anything about TQ management... how could this be effecting me?
I don't know anything about TQ management... how could this be effecting me?
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? WNAPLY - Thanks for the reassurance. I guess I'm doing alright... I just get worried that for some reason my HP is a little on the low side.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimTA:
<strong>What tires are you on? The track times could be ok if you have bad 60s and it was warm that day.
I think your dyno #s are within the average of other LS1s with those mods. Convertors will make you lose a little hp. That 360 rear wheel torque is probably a spike from the convertor.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I already said this stuff above but...
I was running BFG Comp TA Drag Radials and a pretty good 60' of 1.75 only being able to launch at 2300 or so. The 365 torque is definitely not a spike - it's a nice rounded curve that fits the line perfectly and looks just like every other converter'ed car's dyno graph I've ever seen.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JimTA:
<strong>What tires are you on? The track times could be ok if you have bad 60s and it was warm that day.
I think your dyno #s are within the average of other LS1s with those mods. Convertors will make you lose a little hp. That 360 rear wheel torque is probably a spike from the convertor.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I already said this stuff above but...
I was running BFG Comp TA Drag Radials and a pretty good 60' of 1.75 only being able to launch at 2300 or so. The 365 torque is definitely not a spike - it's a nice rounded curve that fits the line perfectly and looks just like every other converter'ed car's dyno graph I've ever seen.
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From: Barbaria
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? QUOTE]I already said this stuff above but...
I was running BFG Comp TA Drag Radials and a pretty good 60' of 1.75 only being able to launch at 2300 or so. The 365 torque is definitely not a spike - it's a nice rounded curve that fits the line perfectly and looks just like every other converter'ed car's dyno graph I've ever seen.[/QB][/QUOTE]
What rpm was that 365 torque at? If it's below 4000, I think its a spike. My full bolton cammed car was doing 380 below 4200. Past the spike it peaked at 360. I have the same convertor as you.
I was running BFG Comp TA Drag Radials and a pretty good 60' of 1.75 only being able to launch at 2300 or so. The 365 torque is definitely not a spike - it's a nice rounded curve that fits the line perfectly and looks just like every other converter'ed car's dyno graph I've ever seen.[/QB][/QUOTE]
What rpm was that 365 torque at? If it's below 4000, I think its a spike. My full bolton cammed car was doing 380 below 4200. Past the spike it peaked at 360. I have the same convertor as you.
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? It's not a spike, it is part of the curve and it is consistent. I have three graphs since the converter that accurately show this.
http://members.fbody.com/2000pewters...yno-layout.jpg
http://members.fbody.com/2000pewters...yno-layout.jpg
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From: Barbaria
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? That is obviously a spike from the convertor. A vig 3200 dyno graph shouldn't even start until at least 3800rpms.
<small>[ March 21, 2002, 04:45 PM: Message edited by: JimTA ]</small>
<small>[ March 21, 2002, 04:45 PM: Message edited by: JimTA ]</small>
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? how is that a spike? The dyno starts when the car is "moving" at a speed at which it wont kick down into lower gears.
I'm sure you know that torque is only a calculation based on horsepower and RPM. No dyno can MEASURE torque. For there to be a torque spike, there MUST also be a horsepower spike. Are you going to tell me that my horsepower numbers are comprised of a spike too?
<small>[ March 21, 2002, 05:29 PM: Message edited by: monSSter1191 ]</small>
I'm sure you know that torque is only a calculation based on horsepower and RPM. No dyno can MEASURE torque. For there to be a torque spike, there MUST also be a horsepower spike. Are you going to tell me that my horsepower numbers are comprised of a spike too?
<small>[ March 21, 2002, 05:29 PM: Message edited by: monSSter1191 ]</small>
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From: Barbaria
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? You don't really know what a torque spike looks like, do you?
I'm not trying to offend you or flame, but that is a spike. Maybe I can get somebody to post my graph later so you can see an example of what a vig 3200 graph looks like without the spike.
I'm not trying to offend you or flame, but that is a spike. Maybe I can get somebody to post my graph later so you can see an example of what a vig 3200 graph looks like without the spike.
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From: Barbaria
Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? Sorry ST3500. I have a vig3200. The spike is still very similar.
<small>[ March 21, 2002, 06:22 PM: Message edited by: JimTA ]</small>
<small>[ March 21, 2002, 06:22 PM: Message edited by: JimTA ]</small>
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Re: 2000 SS Performance - Disappointing Numbers (Track & Dyno)??? Explain to me how and why the number is inaccurate. As we know the torque is based on a calculation from the horsepower, then why is it inaccurate if the horsepower does not spike? The horsepower continues to increase it doesn't jump up and go back down, that is what a spike is. Do you understand what I'm saying?