Post your combo here!

 

14.791@91.11 MPH w/ 2.068 60'.....these times are without the new tranny and torque converter

 

Times and mods are in sig, I am in the process of building another 350 that will have 330 hp and 410 tq and will hopefully put me in the mid to low 13's.

 

Last time I gtech'd, I got a 14.7, thats with no 3rd gear over 1/3 throttle (crappy tranny). FIxing stuff right now, and some new parts and better tranny and stall, I'm looking for an uncoreccted time in the high 13's (with open headers).

 

Close enough...

LT1 cam, Vortec heads, Performer RPM intake, BMR sfcs, BMR lcas, BMR relocation brackets, BMR adj phr, Walbro 255 high volume fuel pump, b&m 2400 stall, stock tbi, stock injectors, 3.42s, posi, falken 275/40/17s, Hooker 2055 headers, catco 3" in/out cat, Flowmaster 3" catback and a stock wot chip, with some timing tuning and partial throttle tuning.

It went 93 mph before the fuel pump, but I only ran that twice as my pump started to die. I got a 454 tbi waiting to go on, too lets hope for 13s with tuning!

 

see my sig for mods. I wonder about the trap speed on the g-tech but my speedo is over 100mph and my launches are very poor. No traction on streets. I may get into the 13s once I get the WBO2 for WOT tuning, but that my be a dream . Power curve gets real flat at 5,000 on the tach.
Step one: Max what I got with the correct afr @WOT
If I pull to 5500 and knockoff 1 or 2 tenths, I am done.
Step two: If no improvement, go to a 4bbl/single plane and re-tune and hope for improvement.

I am probably in the high 13s at sea level, @ 6,000 feet I am definitly slower.

 

the sig is where i was before header/exhaust install.

went against conventional wisdom, and i think i may have hit a small jackpot.

went with slp 1 3/4" headers (w/ air tubes)

dual 2 1/2" cats

awesome custom mandrel-bent y-pipe and 3" cat(s) back.

flowmaster muffler and dual 2 1/2" tailpipes tucked up under the car.

the stock 02 sensor works fine, it idles at 600rpm, and is actually quieter than before (and it's the same muffler!).

more importantly, i'm not experiencing any of the bottom end torque loss i feared with the big tube headers and more free-flowing exhaust.

i have a serious wheelspin problem now where it bogged before. get best 60' times by launching at around 1,500 rpm, waiting till the tires hook, then nailing it. still only in the 2.3-2.4 range. there's a lot more et improvement in lowering those 60' times.

times on the g-tech have varied from 15.30s all the way down to several 14.90 runs. prior to doing the headers, i ran the car down the dragstrip and on the g-tech simultaneously. it was close. the car feels a lot faster now, i think the g-tech is pretty accurate.

comparing the tach to the g-tech memory shows my factory tach to be right at 500 rpm slow. i've gotten my best times shifting at 4000 on the tach. the g-tech memory shows the actual shift point to be at 4500. winding it higher makes it slower.

i'm taking the car to the dyno thursday night to see what the hp/torque changes are. won't be able to get real track times on the car till january. : (


SECRETS TO GETTING ACCURATE G-TECH TIMES:

1. accurate weight. I weighed my car with a full tank of gas and me in it ... 3775lbs (i weigh 275)

2. did the g-tech setup inside, on a flat table, with a level. it corrects to .00, .01 now in the car

3. set rollout to zero. there's a section on rollout in the manual. it makes it clear that the more rollout you set on the unit, the faster the times will be.

 

14.975

vjo beats me?!?!?!?!?!

times were with out the holley tbi, weiand intake, msd box, and fuel pump.

performer tbi intake was on

 

Vjo:
Do you have the stock heads and cam in there?

 

yup, stock heads, cam, intake and tbi, and 161K miles on the engine

 

I guess suspension really does make a huge difference.

 

14.162 @ 92 mph bone stock 86' IROC-Z

 

See sig for 305 TBI with stock un-touched heads.

 

y does beast have a better 1/4 than me and i have more power. 199hp, 293tq what suspension u got.

 

What was your mph? what was your 60'?

My TBI car has stock rear shocks( as far as I know and KYB struts(cheap ones)) stock everything else(IROC sway bars). Raced on GTA crosslace wheels.

Race weight is ~3500+ lbs.

Maybe the gears help, 3.73s, also, my power band is ~600-800 rpm higher, 4400-5200 rpm (~190+ rwhp) I think.

Weight, traction, gears,and shifting(shift points). I wouldn't shift any higher than 4500 rpm or so in your car. Traction should be the major factor. 2.1x 60' vs 2.2x 60' equals .2-.3 sec in the 1/4.

 

yeah i think that was my problem, i was shifting at 5000. but my dyno now shows i should shift lower.

14.97 1/4
2.180 60
92.49 mph

 

ok guys i just found a time slip

14.123 @ 82mph with a reaction time of 1.123 sec cause i was backing up for the stage lights to go on and the lights started to go and then i missed the 2 to 3 shift this was a really messed up run how did i keep my time so low

 

something doesnt seem right there...

 

The only way you could have a 14.1s @ 82 mph, is to have about 400hp, and hit the brakes hard in the last 60 ft.

 

He said he missed the 2 to 3 shift so that explains it.

 

i think he subtracted his reaction time from the 1/4 mile time or something, damn newbies hahahahahaha, now way he is hitting those times with that trap.

 

30mph rolling start

 

i just realized this is the TBI board i have TPI and i usually run about 12.5 seconds

 

try again when you a) hit puberty and b) get a driver's license.

 

what the hells that all about just because i was on the wrong board

 

Dr. Suess, you might want to add your sig to your post or at least tell us what kind of mods you have. I don't think anyone that has responded to your post realizes you are not running a stock 350tpi setup.

Steve

 

i don't know of any setup in the world that runs a 14.1 at 82 mph. my best time so far is a 15.92, and i was running 85mph when i did it. you'd need a 60' time of about 1.0 to get a 14.1 out of 82 mph.

 

That's not necessarily true. If you are running a faster et and brake before the fishish line you will do the same thing. Or if you have a good run throught first and second gear and miss third you can do it as well. If your car is capable of better et's that is.

Steve

 

he says he usually runs 12.5s, but missed 2-3 shift and ran that, so he posted that 1 run in the 14 sec post?

come on! you brag about your fastest times, not your slowest.

 

the topic is in the 14's post here so that run i was in the 14's

 

whatever

it's been days since someone asked you to post your combo. where is it?

 

Dr. Suess, If you do own a car, please post your setup.

 

all i know is that it is a 400ci 6.6l TPI with vortech heads i bought the car like this from a guy up the street it had alot of problems but the engine was new so after i fixed all the electrical and body problems and finally got to drive it the guy had moved and could not ask him what he had done to the engine i am assuming he bought it built this way.