JohnnyLangton
Founding Member
If you'll read through this post,or others linked here-you'll see that I'm comparing cars with the same tuning,same gears,similar exhaust,and similar converters.The closest car to me running PI's is using 4.10's.Marc99GT said:JohnnyLangton,
Are you sure the other T-birds with PI heads are running 3.73 gears, exhaust, converter & tuning like you are? There are so many variables that it's hard to compare vehicles. We will see how well your heads perform when/if you ever decide to get over 400 rwhp. Your non PI heads may work well for a car running high 12s with a decent trap speed, but that could mean they flow well enough in the first 1/8th and die in the 2nd.
Many of us have gone alot faster than 12s and I can't think of one person that was running a very good ET and trap speed using non-PI heads. The problem is your sample size is dwarfed by the number of modified mustangs out there and one car compared to a few others which may or may not have the same modifications will yield inaccurate results.
Distance down the track means nothing where flow is concerned-the heads flow the same amount of air all the time-they don't know how far I am down the track,nor does it matter.
I believe we all can agree that 100 lbs=approx 1 tenth in the 1/4 mile,right?
If so,then remove 6 tenths for comparison to a street driven Mustang,or more than that if you're gonna try to compare to cars lIke Ken's that are seriously lightened.Do that,and my 12.98 drops to 12.38-now how many Automatic equipped cars run quicker than that? Your comparing number of modified Mustangs just dropped to very few.
Here's a cut/paste of the top 10 PI headed cars from the et list on Mod Depot:
1999 - 2003 2V Naturally Aspirated 1/4 ET:
1 . KenB - 10.83 @ 124.41 ( 2000 GT 5 SPD )
2 . Steve Drier (Houston Performance) - 11.45 @ 115.00 ( 1995 GT AUTO - SVO HEADS/INTAKE, STROKED )
3 . starkie - 11.52 @ 116.76 ( 2001 GT 5 SPD )
4 . madmike - 11.68 @ 115.66 ( 2000 GT 5 SPD )
5 . Bill Putnam - 11.97 @ 113.20 ( 2000 GT 5 SPD )
6 . John Edwards - 11.99 @ 112.10 ( 1999 GT AUTO )
7 . Randy Stinchcomb - 11.99 @ 113.65 ( 1996 GT 5 SPD - SVO HEADS/INTAKE )
8 . AutomaticWeapon - 12.05 @ 112.69 ( 2001 GT 5 SPD )
9 . ALLMTR2V - 12.05 @ 111.27 ( 1998 GT 5 SPD - HS )
10 . Racer_X - 12.15 @ 112.90 ( 1996 GT 5 SPD - HS )
11 . Doug Johnson (Fast2v) - 12.17 @ 112.02 ( 2000 GT 5 SPD )
12 . Kurgan - 12.24 @ 110.03 ( 2001 GT 5 SPD )
13 . Shane Williams - 12.25 @ 110.00 ( 1999 GT AUTO )
14 . Gary Youngblood - 12.26 @ 108.00 ( 2001 GT AUTO )
15 . TruBlu01 - 12.39 @ 108.89 ( 2001 GT 5 SPD )
16 . wiz03gt - 12.45 @ 108.03 ( 2003 GT 5 SPD - SOLD )
17 . silver2k2gt - 12.47 @ 107.68 ( 2002 GT AUTO )
18 . RavenGT - 12.50 @ 106.80 ( 2000 GT 5 SPD - SOLD )
19 . wht00gt - 12.59 @ 107.04 ( 2000 GT 5 SPD )
20 . Jeff99GT - 12.62 @ 106.51 ( 1999 GT 5 SPD )
By just a simple weight correction,my car would be #15,and that leaves only 4 auto equipped cars that are quicker.
JL