got my car to the track last week and only hit 12.25 but after that I figured out I was only at 65% throttle due to my TV cable being misadjusted. DOH! so I had to go back one more time befor the years end.


2nd run of the night was my first time ever in the 11's. 11.96 but I knew I could do better cause the 60 wasnt that great. it was like a 1.7x. well, it kept getting better all night consistently in the 11.8x range7 out of 10 runs. two runs I spun bad and those were both 12's. anyways last run of the night was 11.75 @113.7mph on a 1.56 sixty!
I think that was all the cars got the way it is, but it still has a 350 mail order tune. its a 383 now and Im SURE a dyno tune will pick up some more ponies all across the board.

here's the recipe

forged 383 with the 6.0" long rods and -18cc pistons for about 10.5 compression. 233/239 .580lift cam. home ported headsthat flow ok, not great. stock valves/no valve job even. 1.6CC roller rockers. holley 52tbody, home ported intake, 30lb injs, elec. WP, !AIR/swaybar/A/C. jet hot long tube headers/offroad ypipe/edelbrock RPM catback. 3:73 gears stock 10bolt. 3800 EDGE stall conv.. (that conv. ROCKS!) in a lightly beathed on oldschool 700r4. needs a shift kit still. the 2-3 shift is really lazy. the conv. was locked up, but Im not sure if thats functioning under full throttle or not since I dont have a shift kit and am not sure if anything in the trans was mod'd to allow WOT lockup. didnt try any pass's with it not locked up. with the old stall conv. unlocked it ran 12.09 @112mph so thats why I think its not locked up. it def. works at part throttle though cause I can watch the rpm drop when I switch it on.
susp. consist's of stock shocks all around, 24mm iroc rear sway, air bags in rear coils, stock front coils but there cut (which doesnt help me launch since it restricts the weight transfer like limiters do), stock rear lower control arms but there boxed and solid Iroc bushings, stock TA, granetteli SFC's.

Im pretty happy with the car overall but I cant wait to get my dyno tune in spring. Im hoping for a couple more tenths atleast between that and a shift kit and making sure the lockup is working under WOT.

 

Congrats. Very impressive 60' times with the minimal suspension work. I'm looking to dip into the 11s myself. Right now my best is a 12.1 @ 114 with a 1.79 60'.

 

man thats exactly where i was before the 3800 stall. 12.09 on a 1.76 sixty. what gears do you have? I have 373 and its perfect for the car once I put the spray on it. right now I cross the finish line at 5500rpm, and I shift gears around 6300rpm. didnt really try to shift higher yet, I think my max power is prolly around 6100 cause my cam is smallish for a 383. have you raced it in the nice cool air yet? thats the ticket for best times. oh, and I checked out your sig cardomain. nice car. Id recomend the rear air bags. that one pic of your car goin down the track shows you have alot of rear suspension compression. that could be mainly caused by your aftermarket rear springs (1" lower back there too right?) starting lower and prolly not as strong as the stock springs. all I know is the stock v6 rear springs are what all the drag racers use cause there tall and tight. for now my stock Z28 springs are doin jsut fine and Im not messing with my rear suspension untill it doesnt hook up. same for the front. I put about 22lbs air in my ET streets. what about you? also, I learned the best way to launch is off idle or just above. the higher rpm you build on the starting line before the light turns green will actualy soften your launch. I launch from 1200rpm foot stall now.
good luck dude, you'll def. get there. our eng. setups are almost identical except you have the better heads/intake and a real tune. once you get the launch down, you'll be kiling my times.

check this photo out. this is me pulling a 1.7x sixty on a 12.3 run this summer in 90deg. heat before the 3800 stall conv..
http://pg.photos.yahoo.com/ph/irocss...e2.jpg&.src=ph

 

That 12.1 run was actually this past sunday, about 40* in Jersey. I was launching at 1600 or so with 13 psi in the ET streets with the stock 3.23s. I'm considering throwing in a slightly larger converter with a set of 3.73s this winter. Figure that combined with some more practice launching will get me in the 11s no problem come spring time. The BMR rear springs actually have a slightly higher spring rate then the stock springs. I kept the originals so I can always swap them out real quick if I ever wanted though.

 

Congrats.

Why on earth would people tell me using -16cc pistons in a 383 is a big mistake and 10.8:1 CR is low???

Why didn't you use flat top pistons that everyone with 383 seem to be using for 12.0+:1 CR?

 

Nice going, and a good looking car. I too hope to crack a high 11 pretty soon now that my valve float is gone. Good luck and I hope you find a few more tenths before you spray it, and then mid to low 10's?

 

actually I saw that thread. not sure. I remember when I was deciding on pistons, I had to make a decision on flat tops/w/o decking the block and thick gaskets, or go ahead and deck the block, use the impala gaskets, and be in a comfortable spot to use pump gas (premium though). I think with the flat tops I didnt have much choice/room to vary other things like the deck height, or if I could mill the heads later, stuff like that. have you used the DCR calculator yet? that plays alot more into what your max SCR can be with pump gas. but I didnt know about that at the time. it is possible to have 12:1 SCR and still run pump gas, but it'll take the right cam (valve timing thats built into the cam that will determine dynamic compression ratio) and a spot on dyno tune. I also didnt have the money at the time to have a dyno tune so a mail order tune would have to do for a while.