14.45 with 12 sec combo... HELP
hi guys
I'll tell you my problem. i have a 1976 duster with this combo:
360 - .030 over
KB107 pistons
stock rods and crank (ARP bolts on rods)
587 heads - ported and 2.02 valves
Torker 2 intake
Holley 750 DP- 73-82
crower camshaft 267-271 - 474- 485 lift (267hdp)
dana 44 with spool -391 gears
TF904 - transgo
Dacco 2500 converter
26x10 slicks
MSD 6AL 5500 limiter
true dual exhaust - 2 dynomax super turbo - no x pipe
yesterday I went to the track ...
my duster was moving, did not go right ... my best ET was a disappointing 14.43. the track havent 60 foot- mph, etc... only ET
what happen with my duster???... We expected 12.90 :???::???:
HELPPPP
You have an easy 12 second combo. How do I know? I built an almost identical combo for a Duster that ran deep into the 12s.
You didn't need to get rid of the Torker 2 manifold, it's the Torker 340 that is terrible. That being said, the ProComp/Professional Products dual plane is a good choice, and made more power on the dyno than an Edelbrock RPM Airgap. By the way, it isn't made in Japan, which incidentally, is where just about everyone's TV is made these days.
I believe you would be better off with a vacuum secondary carb with such a tight converter, but with 3.91:1 gears, it should still get into the 12's without a problem.
With stock rockers, you should run your best et's shifting at 52-5400 rpm. With a 1.6 roller rocker, it will like 5800-6000.
Your ignition timing should be about 15-16 degrees initial, and 34-35 degrees total. Do not put a bunch of total timing in the motor with the KB pistons. It will detonate, and break a lot of stuff.
Work on the suspension. My customer ran 12's on regular 8" radial street tires, not drag radials. You will drive yourself mad if you keep swapping parts without sorting out what you already have.
Check out this YouTube link of a motor very close to yours.
[ame="https://www.youtube.com/watch?v=GtpWWHjZamQ"]SB 360 Mopar Dyno Test - YouTube[/ame]
Also, a pic of the motor.
Mike Beachel
B³ Racing Engines
www.b3racingengines.com