AFR H/C results.
Originally Posted by Grant B
BTW, I don't know how you guys get your Vettes so heavy. Does your Z06 have an iron block, Reboot? My FRC weighed in at 3100lbs with a half tank of gas, Z06 muffers and a 20lb trailer hitch.
Originally Posted by Reboot
Not to be disrespectful Tony, but 124mph with 480rwhp isn't all that impressive in a Vette. It doesn't take 480 to run 124 in a Vette (unless it's an automatic).
My Z06 ran 121.2mph with 387rwhp with just headers and a Vortex airbox at Sac raceway.
With only 453/434, I ran it three times 124.8mph and 126.7mph at Sac and 129.1mph at Infineon. This was a fresh 383 with shitty heads that have since been replaced. At that time, I was making about 30rwhp less than your Vette and about the same torque. My race weight is about the same as yours. I'm also running a M6 and not a MN12 with 3.42's. So why are you touting your 124mph trap on an f-body board as some sort of major accomplishment?
My Z06 ran 121.2mph with 387rwhp with just headers and a Vortex airbox at Sac raceway.
With only 453/434, I ran it three times 124.8mph and 126.7mph at Sac and 129.1mph at Infineon. This was a fresh 383 with shitty heads that have since been replaced. At that time, I was making about 30rwhp less than your Vette and about the same torque. My race weight is about the same as yours. I'm also running a M6 and not a MN12 with 3.42's. So why are you touting your 124mph trap on an f-body board as some sort of major accomplishment?
First off, if my dyno numbers are high (you seem to be implicating that) and my trap speed is NOT "some sort of a major accomplishment", then why aren't there a lot of 450 RWHP 3440 lb. stock displacement H/C cars running around routinely exceeding those numbers.....the answer is there are very few, and if you happen to live near a track thats 80 feet above sea level and you went there in the middle of January, there lies a pretty good chance you might catch a D/A of -1500....a legit 450 RWHP car that weighed the same as mine good pull off 124 in THOSE conditions.
Comparing a 383 CID car (which compared to a shorter stroke 346 could potentially make more AVERAGE torque and HP, even with lower peak figures) that is 100 lbs lighter (not "about the same"), and having no idea of the actual quality of the air to give us something to compare is once again apples and oranges. Comparisons EVERYONE can relate to and learn from have to be on a "level playing field".
If I'm not mistaken, the two fastest C5 stock displacement H/C cars are J-Rod's and Brent's Z06's.....Both of them ran mid 10's at 126-127 MPH. I don't recall the exact numbers....someone correct me if I'm wrong. I know J-Rod's car is almost 200 lbs lighter than mine and I have to assume Brent's raceweight is probably close. One of them had a slightly negative D/A, the other had a slightly positive D/A and both of them were noted to have engines producing right at or close to 500 RWHP. I remember numerous 5 page threads "rejoicing" those facts and figures with beer glasses clanging and thumbs up everywhere. What am I missing here???
Here is more numbers for the number crunchers....(my life is spent toiling over numbers!)
Take the same 3440 lb car....same driver, shift points, speed of shifts, etc....drop that car on a track thats EXACTLY 1500 feet closer to sea level. My 124 MPH trap speed just increased to 126.4
Now let me remove 140 lbs and go down that same track the very same day....raceweight 3300 lbs (were getting there....J-Rods car is STILL lighter)
Trap speed just increased to exactly 128 MPH.
ITS ALL JUST MATH....you guys that have a good computer simulation program of dragstrip times versus weight, power, air quality, etc. can back up the results I just printed (or should certainly come close).
Comparing Dragstrip performance is FAR worse than trying to compare chassis dyno numbers....At least if the dyno builders did their job correctly and all the actual testing was on the "up and up" (nobody skewing the numbers), in a perfect world you CAN compare two cars 3000 miles from one another with CORRECTED figures....SAE being the most common. The correction factors simply level the playing field.
And speaking of corrected figures and chassis dyno results, I will say for the last time that the figures I have quoted you guys are very accurate....Five different dynos, two of them in another state, all read within 10 HP of one another from highest to lowest. Thats only a 2% disparity....not too bad considering....and in MY opinion the results of my car do in fact back up those numbers (when considering all the "variables"). ALSO, someone mentioned about my Exedy clutch....the dyno figures I have been "touting" (475-480 RWHP) were all recorded thru a SPEC II with a Fidenza aluminum flywheel....might have to hit the dyno quickly before the 225 install to re-baseline the car before the swap.
(I've been dying to use that!....LOL)I'm tired now.....it's your move
Regards to all,
Tony Mamo
Last edited by Tony Mamo @ AFR; Dec 22, 2004 at 10:36 PM.
The GTO's IRS drivetrain seams to soak up an extra 25rwhp, buddy of mine with '04 GTO put in a Comp .581 .581 224/224 114* and put down 375rwhp with SW LT's and pulley as only mods. On an Fbody that would have been an easy 400rwhp.
Last edited by fullfloatingHD; Dec 25, 2004 at 04:14 AM.
Originally Posted by John B
Holy smokes!!!! Ditch this in a heartbeat!!! You're probably leaving 25+ RWHP on the table at a minimum! If you have any doubts, just run the motor uncorked.
