Edelbrock RPM 440's for my 383 were delivered today and it felt like Christmas, all over. Only took 4 days from Mancini's. I also got the Pro Magnum roller rockers.

Anyone care to hazzard a guess as to how much time it'll shave off my ET ? MPH increase ? I'm going from stock 906's and steel stamped rockers. The best ET I had last season was 12.024 @ 112.4

 

11.43 @ 127

 

11.70s?? Better get ready. It may quit snowing someday ??

 

I'll say 11.60s

 

Hummm. So far the guesstimates are between 11.43 and 11.78. I'm thinking 11.50 to 11.55 That would still be quite a leap.

Out of the box, they look pretty good, just gonna clean up some minor casting flash in the ports. Yeah, Mike, some tuning work will definitely be in order when I finally make it to the track.

For now, just hoping for a break in the weather.

 

11.87

 

Ordered a Crane solid cam today; 248/258 @ .050, 540/560 lift, 108 LSD.
Adding Pro Magnum roller rockers with the Eddy heads.
Looking to get some revised estimates from you guys as to ET and MPH.

Here's the rest of the combo:

'69 383 block, stock bore
Torker2 intake
750 Holley (worked, flows 930)
jets 78 primary + 80 secondary
Harwood scoop with sealed air tray
MSD 6AL with MSD distributor + Blaster2 coil
plug gap .045, AR3924, total timing 37deg, all in @2400
Maziere electric water pump
Moroso crankcase evacuation kit
Hooker Super Comps, 2" prim + 3.5" collectors
Motor plates, front and mid
Milodon 7 qt oil pan with baffle
AFCO aluminum radiator
Flaming River manual steering box
Autometer guages and Tach
Kirkey Pro Street aluminum seat
12 pt roll cage with swing out side bars
Hurst Quarter stick, reverse shift pattern
Cheeteh manual VB
B&M diffuser type tranny cooler
TCI 10" 3600 stall convertor
Steel driveshaft 3.5", 1350 Series U joints
8.75 rear, 35 spline Moser axels, 4.56 gears, full spool
CE ladder bars
SS leaf springs with housing floaters
90/10 frt shocks, 50/50 rear
6 cyl torsion bars
Welded subframe connectors
MT slicks 29.5x11.5x15
4 gal fuel cell, 120 gph Summit fuel pump
Dual batterys wired in series
Fiberglass bumpers
Fiberglass lift off hood
Wildwood discs in rear, factory discs up front

So far, I've had a best of 12.024 @ 112.4
1.66 60" time
Leave @ 1800 rpm, shift @ 5600

What do you think it'll run?

 

What cam did you have?

 

I'll be going from a MP .509 hydraulic.