Here Chebby Chebby
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
Thanks Mark 
We are going to run it on ET Street drag Radials. Once we get it dailed in and hooking we are going to hit it with at least a 150 shot which should put it with or a head of mine 
I am with you on the Cobra we all want to hear news like that I need to go get some more files a The dyno and I will snag that file and take a look at it in SAE and Win Pep seven.
BTW Winpep 7 shows my car at 607 RWHP and 561 RWTQ SAE Corrected and 633.88 RWHP and around 600 RWTQ UN-Corrected. There is one huge spike where it hit 845RWTQ where the tires let go on the rollers around 5,800.
UN-Corrected numbers look good but do not stand up season to season
We are going to run it on ET Street drag Radials. Once we get it dailed in and hooking we are going to hit it with at least a 150 shot which should put it with or a head of mine I am with you on the Cobra we all want to hear news like that
I need to go get some more files a The dyno and I will snag that file and take a look at it in SAE and Win Pep seven.BTW Winpep 7 shows my car at 607 RWHP and 561 RWTQ SAE Corrected and 633.88 RWHP and around 600 RWTQ UN-Corrected. There is one huge spike where it hit 845RWTQ where the tires let go on the rollers around 5,800.
UN-Corrected numbers look good but do not stand up season to season
TECH Regular
Joined: Jul 2005
Posts: 452
Likes: 0
Originally Posted by TwoFast4Lv
I am with holding comments on the 'Stock: car you refer to
Thanks for the words
Thanks for the words
I still don't understand the difference between WinPep 6 & 7 Ellis. Other than the numbers are smaller with 7. Or why you keep poo-pooing numbers from 6. Seems like it just makes it more like Mustang Dyno #s only without actually loading the car.
I can sort of understand massaging the tq numbers to eliminate the converter's affect. But other spreadsheets I've used indicate I need 800hp to make my pig run the times it does. Actually, most say I need more hp. Please educate me Master Groo....
I can sort of understand massaging the tq numbers to eliminate the converter's affect. But other spreadsheets I've used indicate I need 800hp to make my pig run the times it does. Actually, most say I need more hp. Please educate me Master Groo....
TECH Enthusiast
Joined: Mar 2005
Posts: 701
Likes: 0
From: Arlington, WA
Originally Posted by 99blancoSS
So your saying an 04 cobra put down 427 stock? Not even a better filter?
I might have to drop the n2o and go s/c the way things are going.
bottle doesnt last for ever.
I might have to drop the n2o and go s/c the way things are going.bottle doesnt last for ever.
SVTOA Dyno Day.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
Mark winpep 6 had a problem in-accurately reporting the correct number. What is so hard to under stand about that? Pretty easy actually.
The problem was not so much with the HP side of the numbers but the TQ side. Now every one likes big numbers but a 200RWTQ error seems to be enough for me to use the more acurate tool
Now as far as the numbers? TQ has as much if not more of an effect then HP at times and HP is in effect a calculation of TQ...IF calculated correctly
I personaly like tools to be as acurate as possible. would you use a TQ wrench that was off by 25%? I wouldn't
EJ. I think it is cool that the car laid down those numbers. Very impressive. But even GM never under reported numbers that far off. I am a little skeptical but hey arent we all. does not take away from his numbers a bit
The problem was not so much with the HP side of the numbers but the TQ side. Now every one likes big numbers but a 200RWTQ error seems to be enough for me to use the more acurate tool
Now as far as the numbers? TQ has as much if not more of an effect then HP at times and HP is in effect a calculation of TQ...IF calculated correctly
I personaly like tools to be as acurate as possible. would you use a TQ wrench that was off by 25%? I wouldn't
EJ. I think it is cool that the car laid down those numbers. Very impressive. But even GM never under reported numbers that far off. I am a little skeptical but hey arent we all. does not take away from his numbers a bit
TECH Addict
Joined: May 2004
Posts: 2,564
Likes: 0
From: Bellingham/Edmonds, WA
Originally Posted by TwoFast4Lv
Now as far as the numbers? TQ has as much if not more of an effect then HP at times and HP is in effect a calculation of TQ...IF calculated correctly
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
I seem to recall a calculus class years ago where HP and TQ were used to illustrate derivatives. IIRC, HP is the force being applied and TQ is the derivative of HP, i.e. the rate at which HP is increasing. It then follows that TQ is more relevant to 1/4 times because it's primarily about how rapidly you can spin up, shift and spin up again, i.e. the rate of change.
It's been almost 15 years since I took those classes, so someone correct me if my memory is failing.
It's been almost 15 years since I took those classes, so someone correct me if my memory is failing.
It's not hard to understand Ellis, it's just I've never heard anyone else say it. But then you are the tuning guru, so you should know. I guess I need to read more. It makes sense. I have trouble believing my car makes 760 rwtq with "only" 618 rwhp.
Which brings up another question. If I dyno my car on a Mustang Dyno, will I still have to roll into the throttle so it doesn't blow the tires away, or will I be able to nail it & get an accurate TQ reading? (since I figure WinPep 7 can't help that problem on a DynoJet)
Which brings up another question. If I dyno my car on a Mustang Dyno, will I still have to roll into the throttle so it doesn't blow the tires away, or will I be able to nail it & get an accurate TQ reading? (since I figure WinPep 7 can't help that problem on a DynoJet)
TECH Addict
Joined: May 2004
Posts: 2,564
Likes: 0
From: Bellingham/Edmonds, WA
Originally Posted by Crisisman
I seem to recall a calculus class years ago where HP and TQ were used to illustrate derivatives.
Originally Posted by Poik
No, they are just functions of eachother. TQ = (HP*5252)/(RPM). If they were derivatives then TQ = 0 when the HP starts to drop.
The derivatives I remembered are from:
"Torque is the time-derivative of angular momentum, just as force is the time-derivative of linear momentum:
torque = dL/dt
where L is angular momentum and t is time."
Higher math is definitely a use it or lose it skill. I'm feeling old now.
Originally Posted by Crisisman
I seem to recall a calculus class years ago where HP and TQ were used to illustrate derivatives. IIRC, HP is the force being applied and TQ is the derivative of HP, i.e. the rate at which HP is increasing. It then follows that TQ is more relevant to 1/4 times because it's primarily about how rapidly you can spin up, shift and spin up again, i.e. the rate of change.
It's been almost 15 years since I took those classes, so someone correct me if my memory is failing.
It's been almost 15 years since I took those classes, so someone correct me if my memory is failing.
Robert
Thread Starter
Launching!
Joined: Jan 2007
Posts: 238
Likes: 0
From: Charlie Town, WV
Originally Posted by FiveLiterRiceEater
You should quit talking and start modding... You have the money.
DBAP.
DBAP.
SF's going on the COBRA on the 17th, thats a start..
Ken
Originally Posted by WAHUSKER
Which brings up another question. If I dyno my car on a Mustang Dyno, will I still have to roll into the throttle so it doesn't blow the tires away, or will I be able to nail it & get an accurate TQ reading? (since I figure WinPep 7 can't help that problem on a DynoJet)
Thread Starter
Launching!
Joined: Jan 2007
Posts: 238
Likes: 0
From: Charlie Town, WV
Pontiac G6 = POS
I have had one for the last two weeks while here in Portland, do not like it.
It rattles like no other, my F-150 with 150K is more solid.
Cant reach the door to close it if you are sitting in the drivers seat.
Stupid ******* door locks stay way up even if the doors are locked, so when you go to rest your arm on the window seal you have this thing poking you in the arm.... BS I say... go GM
Oh, It handles like I have two flat tires in the *** end, wiggles everywhere...
bottom line, me not like
Ken
I have had one for the last two weeks while here in Portland, do not like it.
It rattles like no other, my F-150 with 150K is more solid.
Cant reach the door to close it if you are sitting in the drivers seat.
Stupid ******* door locks stay way up even if the doors are locked, so when you go to rest your arm on the window seal you have this thing poking you in the arm.... BS I say... go GM
Oh, It handles like I have two flat tires in the *** end, wiggles everywhere...
bottom line, me not like
Ken
