A different SSGT question?

[Paul Precht]

It's a Superstock motor put in a different year body. I'm building the same motor, it's rated at 304 HP for GT. In a Duster you'll fall higher than GT/HA so you'll need a full certified cage for starts.

[Jeff Teuton]

Pistons can have notches in SS I think and I think there was an available scoop in a 74, so a live scoop is ok since the 383 had a scoop.

[Philip Saran]

Originally Posted by Paul Precht

It's a Superstock motor put in a different year body. I'm building the same motor, it's rated at 304 HP for GT. In a Duster you'll fall higher than GT/HA so you'll need a full certified cage for starts.

Paul, if I looked at the numbers correctly, my 1974 Duster has to be at the
highest weight of a 360 Duster at 3400lbs so it should fall into SSGT/FA,
but maybe I did it wrong?

[Jeff Lee]

Enter shipping weight for chosen body style -> 3242.00 lbs
Enter factored HP for chosen engine -> 300.00 HP
Enter A for automatic, M for stick -> a A or M

CALCULATED VALUES:
Minus 250lb permitted shipping weight adjustment 2992.00
Plus 250lb permitted shipping weight adjustment 3492.00
"Natural" class -> GT/FA Wgt Break-> 10.81 GT/F
Lowest legal class -> GT/DA Wgt Break-> 9.97 GT/D
Highest legal class -> GT/HA Wgt Break-> 11.64 GT/H



Class GT/DA GT/EA GT/FA GT/GA GT/HA
Index 10.50 10.65 10.80 10.90 11.05
0.3 under index 10.20 10.35 10.50 10.60 10.75
0.5 under index 10.00 10.15 10.30 10.40 10.55
0.8 under index 9.70 9.85 10.00 10.10 10.25

MINIMUM Weight 2992.00 3000.00 3150.00 3300.00 3450.00
MINIMUM Race Weight incl. 170 lbs for driver 3162.00 3170.00 3320.00 3470.00 3620.00

Estimated HP required for E.T. #1 (SEE NOTE 1)
Index 516.9 496.7 500.1 509.6 511.4
0.3 under index 563.9 541.2 544.2 554.1 555.4
0.5 under index 598.4 573.8 576.5 586.7 587.6
0.8 under index 655.7 627.8 630.0 640.6 640.7

"NOTE 1: Flywheel HP requirement to achieve E.T. based on the Chrysler estimation equation:
HP = Weight * 200/(ET^3)
using the Minimum Race Weight."

Estimated HP required for E.T. #2 (SEE NOTE 2)
Index 498.8 479.3 482.6 491.8 493.5
0.3 under index 544.1 522.2 525.2 534.8 536.0
0.5 under index 577.5 553.7 556.4 566.2 567.0
0.8 under index 632.7 605.9 608.0 618.2 618.3

"NOTE 2: Flywheel HP requirement to achieve E.T. based on uniform acceleration equation:
HP = Weight * 193/(ET^3)
using the Minimum Race Weight."

[Philip Saran]

Thank you Jeff Lee, now all I need is for the Lotto numbers to fall my way....

[Jim Hanig]

Originally Posted by Paul Precht

It's a Superstock motor put in a different year body. I'm building the same motor, it's rated at 304 HP for GT. In a Duster you'll fall higher than GT/HA so you'll need a full certified cage for starts.

Not so ,it starts at gt/ga

[Patric Fox]

I thought for Super Stock that you can use any intake manifold as long as it is configured the same as the original manifold.

[Paul Precht]

Originally Posted by Jim Hanig

Not so ,it starts at gt/ga

Wow,I didn't know a 74 Duster was so heavy. In GT/HA it will have to weigh 3666 minimum. I'll have to put 290lbs into my Sport Fury just to touch the GT/HA minimum with the 70 383. I'm not sure how I'm going to do that yet, Paul.

[Jim Hanig]

Originally Posted by jim hanig

not so ,it starts at gt/ga

should have read the whole post.

[Paul Precht]

Originally Posted by Jim Hanig

should have read the whole post.

I'm not sure who you're saying should have read the whole post, me or you. I'm trying to figure out the GT weight thing myself but the way it reads on the NHRA site, the 74 Duster has a shipping weight of 3242 max and adding 250 to that =3492. 304 HP X 11.5 factor for GT/HA=3496 which means this car can not run GT/HA as a 74 with the 70 383 and it will have to run a full cage which is what I was trying to say in my first post. The good news is as a 75 it will make the class as the shipping weight is high enough, Paul..