Berk HFC dyno
Originally Posted by crg914
Are you kidding me? Tire spin might effect E/T but not so much with trap unless you spin all the way down the track. End speed an altitude may have an effect, but not enough to make the estimate 30whp low. I dont know about Ennis, but 106.2 is not a 280whp car, especially when stock Z's have trapped 107.xx. There may be some driving and track condition variables but if are really putting down 280+ at the wheels, you should be trapping higher than that. I am sure you will defend your numbers because you want to believe them so think what you want. I just think otherwise.
Thread Starter
Joined: Jun 2005
Posts: 1,625
Likes: 0
From: Flower Mound, TX
Thanks
I have some bad one as well with low traps.
All of my time slips are posted in the drag thread and verified.
I have some bad one as well with low traps.

All of my time slips are posted in the drag thread and verified.
Last edited by WalkerT; Apr 24, 2008 at 02:43 AM.
Originally Posted by Nexx
my stock LS1 98 SS Camaro ran 13.4 at 105mph at Ennis and it dyno'd in the 290's. you sir need to stfu and take your ricer math elsewhere. we've have had dyno days at the same dyno walkert had his done. modded DE motors were dynoing anywhere from 235 to 255whp. my Z with a vortech 3.12 pulley was putting down 360whp on that same dyno. in my eyes HPP's dyno is pretty accurate, noway its inflated.
I'm going with this same setup again...nice numbers and times man!
at this thread.Please, everybody shut the f*ck up if you have little to no racing experience/knowledge. Let the man be with his dyno results and his trap speed.
edit-
I'll give you guys a hint about why his trap is only 106mph for 280+ whp, when certain othes dyno less but trap higher (DA and corrections).
In TX, the conditions are pretty shtty, which equates to lower DAs than those experienced up north in NJ, PA, NY, VA, DE, MD, etc. There's a negative correlation between DA and trap speed. The highest I've trapped was 104.98mph and the fastest I've gone down the strip was 13.212s (with multiple 13.2s and 13.3s to back it up). The highest I've put down on the dyno was 252.75whp. Do they all seem right according to online calculators? DA is what gives you those record breaking numbers, given that the driver is skilled.
And as far as dynos go, they correct the numbers according to conditions. Hence the number you see is NEVER the EXACT number your car puts down, which is not measurable to begin with (different machines, different dynos, different correctional figures, etc).
To sum, yes his numbers seem high and yes he could trap higher with that much power. But, remember his number has been adjusted and his trap varies according to climate conditions (track prep does not play too much role).
Last edited by 3hree5ive0ero; Apr 24, 2008 at 06:07 PM.
Originally Posted by 3hree5ive0ero
In TX, the conditions are pretty shtty, which equates to lower DAs than those experienced up north in NJ, PA, NY, VA, DE, MD, etc. There's a negative correlation between DA and trap speed.
And as far as dynos go, they correct the numbers according to conditions. Hence the number you see is NEVER the EXACT number your car puts down, which is not measurable to begin with (different machines, different dynos, different correctional figures, etc).
shtty conditions don't equate to low da, "good" conditions equate to low da. the Northeast (nj, ny, ma, etc) gets PLENTY of mineshaft days, even more than Texas. Lots of records are set at places like maryland international raceway, atco, cecil county, etc. In texas, houston raceway (hrp - 19' above sea level) is probably the fastest/most consistent prep surface and has record type capability. But regardless of your location, as long as the track is sea levelish and well prepped (like all these tracks have in common), "good (low)" DA conditions = low temp, low humidity and high barometric readings. texas in the winter gets plenty of mineshaft days after cold fronts pass...they also get "mountain top" DA days in the summer when 95 degree heat, 75% humidity and low barometer readings occur. this is the calculator I use for approximate results, however, a portable weather station is even better
http://wahiduddin.net/calc/calc_da_rh.htm
and you can get "uncorrected" or "actual" results from a 248c dynojet, just ask the operator to print it out both ways. One SAE corrected, one ACTUAL. Most will also choose smoothing 5 to help minimize harmonic spikes near redline as well.
Thread
Thread Starter
Forum
Replies
Last Post
seagrasser
Zs & Gs For Sale
6
Oct 11, 2015 03:27 PM






