I just got back from the scales and weighed my car with me in it. Came out to 3,640 lbs.

Here is the motor:
GM 4 bolt 383
Canfield 220 CNC'd Heads (65 cc)
Forged JE pistons (about 11.5:1)
Super Victor Intake with 1 in spacer
Mighty Demon 750
Crower solid roller cam Specs as follows:
Grind number 290R, 290/296 adv, 260/266 at .050 with .585,.597 lift.
Yella Terra platinum race rockers, 1:6 intake and 1:5 exhaust.
1 3/4 Hooker Super Comp headers
2 1/2 in PYPES exhaust with X pipe

Transmission:
Th400 with trans brake. Standard gear set, hardened input and output shaft, hv pump, straight cut gears, timkin bearings throughout.
Torque Converter: Spec Rite 4500 rpm (accually flashes at 4300)

Rear End:
Currie Enterprises 9" Ford with 3:89 gears and a Strange Spool.

Tires:
(rear) MT ET Drag 15X8 Rims, MT ET Drag Slicks (26X8.5)

Suspension:
QA1 R Series coil over fronts, QA1 Stocker Star Rear shocks with slighty stiffer than stock rear springs.

Last Pass at the track:
1.677 60 ft
90.25 Mid MPH
7.60990 660 ft
111.56 End MPH
11.98886 ET

Where am I leaving time on the table? (Other than me losing 25 lbs)

Is it spinning, what is the trap RPM ?

Steve,
I'd say it's all in your 60' times. Love to see that down in the low 1.5X range, at least.
Curious, where are your front shocks set at? Mine seem to work best at 2 clicks up from full soft. And the Rears?
Have you tried running with the timing locked out?

Any idea on the DA during your 11.98 run?? Looking at your last pass info, I'd say the 60' is not really far off for the mph/et. I would spend some time tuning the combo, both engine/chassis, and paying attention to DA before making any big money changes.

Any idea on the DA during your 11.98 run?? Looking at your last pass info, I'd say the 60' is not really far off for the mph/et. I would spend some time tuning the combo, both engine/chassis, and paying attention to DA before making any big money changes.
This is what I have for current conditions:
Air Temp:88.2 Degrees
Altimiter Setting 29.92
Dew Point 45 Degrees
Altitude 504.8

Relative Horsepower 98.2%
Air Density 1.1346 kg/m3
Relative Air Density 92.6
Density Altitude 2613 ft
Virtual Temperature 90.3 Degrees
Absolute Air Pressure: 29.39
Vapor Pressure .3 inches Hg
Relative Humidity 22.4%
Dyno Correction Factor 1.018

If I change the temp to 100 Degrees, which is what it usually is when we run the DA goes to 3326 feet with relative horsepower dropping to 97%

Now all I need to do is know what the heck to do with all those numbers. Help!

I'd say the DA was close to 3500 feet that night.
I think the CR is a little low for the heads,intake and cam. The rear gear and first gear ratio along with the stall is taylored for a milder set up. While the heads, intake and cam are set up to sing. I assume you are going through the traps around 5800rpm?

That being said you have a beautiful ride that flat out hauls the mail. If you want to make it an all out drag racer....tub it...BBC it...stall it to the moon...and oh yes...don't forget the wheelie bars :)

oh yea..if you want to borrow a custom TPC 950HP holley....you might just pick up a few tenths..I have a spare that was just freshened. One bowl was damaged in shipping, but I have more bowls.

That works out to around 420HP at the flywheel

Steve, just looking at it so far, I think the biggest gains from a parts change (assuming you get it/have it tuned properly) would be a 4.56 gear/28" tire/8" converter. The question is how much streetablility are you willing to give up?? FWIW, we have a 10.7:1 383 with AFR 195's (210 after hand porting) with hydro roller, 4.10's, 8" converter that will run 10.80's at 3600lbs. In your 3500DA it would go 11.1x. It's simply a matter of matching the parts, and tuning.

BigJim-No need for big tires, wheelie bars, or BBC's....unless were talking 8's. ;)

BigJim-No need for big tires, wheelie bars, or BBC's....unless were talking 8's. ;)


LOL...well that's where my mind is...

Steve,

I'll expand on what John mentioned. Your heads are WAY too big to work with your mild gear, converter, cam, intake etc. Your kind of in no man's land. I used to have a similar combo.

What are your goals for the car?

If you want to go low 11's/high 10's with your current heads then the following changes are needed.

4.56 gear
28x10.5 slick
5200-5500 RPM 8" converter
~.680-.700 lift cam (current duration OK)
Shift at 7200-7400 RPM
3" exhaust

60' times should drop to the low 1.5s.

If you want to run similar times (maybe slightly slower) with a milder combo the following changes are required.

4800 RPM 8" converter
<200 cc head with very good flow numbers
Performer RPM airgap
1-5/8" headers
3" exhaust

On my similar 383 SBC with AFR 220's I picked up 4 MPH in the 1/8th switching from 2-1/2" non-mandrel exhaust with 3-chamber Flowmasters to a homemade 3" mandrel system with 2-chamber Flowmasters.

:eek: He has more adv. duration, duration at .050 than the cam in my 505, but most think its too small ;) In most cases for street/strip, smaller is better. I've never built a fast smallblock so that may be what they need :confused: carb too small? headers too big? exhaust too small?

Hey John/Jason, had Jay tell me I'm running an oversized restrictor plate motor, mainly cam too small, and he said it needs a single plane intake. I gotta cam to try, may end up with the RPM back on it though. I wouldnt expect it to run with Bills 540, but I think 10.20's are doable with heads and compression I'm working with.

The goal is to only run down to 11.50. I have no cage and don't want to cut the car up to put one in. So do you think a 3" exhaust would be one place to start?

Steve,
I'd say it's all in your 60' times. Love to see that down in the low 1.5X range, at least.
Curious, where are your front shocks set at? Mine seem to work best at 2 clicks up from full soft. And the Rears?
Have you tried running with the timing locked out? This time slip looks all in line for a 12 flat run. A 1.60 something is about all one can expect from this much power and 3.89 gears. It all looks good to me, not a bad run at all. You have to have over 500 horsepower before they start to go 1.50 sixty foots, it isn't going to happen with 400 unless it is seriously overgeared. If it's still pulling hard you could gear it steeper and get a little but other than that you'll need to get more power. A guy here has a LT-4 late model firebird that runs 10.20s-40s but it has lots of head work, 16-1 compression and a lot of computer tweeking from a guy who knows how. P.S....I went back and read the air readings you gave. It will pick up a couple of tenths and 2-3 MPH when you get past the summer air conditions. You definately need more gear, probably like John said, 4.56 or 4.88, to make it really haul. The motor should pull into the low 7000 range with no problems it just needs more gear with the big cam and big heads.

More gear and converter are needed with those heads especially, and a bit more cam won't hurt either....