98znasty

As the title says, I believe I've got the bugs worked out of my setup and I feel like it traps low for what's done. however the d/a at my track can get pretty bad, could that be the culprit?

BEFORE
160k stock internal ls1
1 3/4 long tubes y pipe with cutout
Slp lid no filter
6 speed
4:10 rear gears
tubular lcas with relocation brackets
tubular panhard bar
Umi SFC's
245/50/16 555R
Frost mail order tune
Unknown D/A
60' 2.0
1/4 time 13.4
1/4 mph 105

AFTER
hone and re ring ls1
stage 2.5 prc 243 64cc heads
.040 head gasket
228/232 .555 112 Crane cam
same headers but with tsp dumped duals
fast 92 intake
NW 92 TB
85mm MAF
ls6 valley cover
7.375 push rods
ls2 coils
ati balancer
a/c and Heater delete
gtp injectors and racetronics 255 with hotwire kit
tubular k
4l60e swap built with Pro-built automatics street strip kit
yank ss 4k
trans cooler
3.42 gears
mwc short torque arm
local dyno tune (410hp)
same tires
shifting at 6600

60' 1.75
1/4 time 12.3
1/4 mph 110
D/A +6500'

wanted to get some opinions, is it normal to only pick up 5 mph adding H/C/I and swapping trans? Unless the d/a was a lot better on my bolt ons pass and the stall is eating up a few mph I think it should have gained more mph. Any ideas on something robbing hp? I raced on 100 octane to avoid any knock retard.

thanks guys sorry for the long post

HCI2000SS

iTrader: (2)

Is the car tuned for 100 octane?

98CayenneT/A

I picked up 12 mph going from converter and exhaust to H/C.

That D.A is really **** poor lol
Your times corrected you would be around 11.3@119 mph
high da is definitely a killer man

I do not think the 100 octane helped ya either

98znasty

Wow, corrected seems plenty fast lol. I should clarify with the 100 octane. I only have 91 octane down here so I added 3 gal of 100 to a 1/4 tank of 91 just to be safe, it gets hot in Tucson. Car is tuned for 91.

98znasty

12mph dam I was really hoping id pick up 10 mph. 5 just seems like something is wrong. You might have a more ideal setup than mine though, I know my cam is fairly tame real low lift compared to everyone else.

Rob98LS1

iTrader: (5)

What was the D.A from the "before" run? Your corrected time seems fairly on par for a mid-range h/c setup.

98znasty

I don't remember exactly, it was a while ago I think it was a cooler month though. I'll try to find the old slip
if that's what it would run at sea level than yeah I agree the car is fine I just have a crappy track.