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#1 |
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Location: Arkansas - In the middle of everything.
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To calculate GT combinations:
1) Go to www.classracerinfo.com 2) Register as a member if you have not done it already 3) Go to link for Technical Tools 4) Select NHRA Classification Tool 5) Select your car year-model (1971 Plymouth, 1987 Camaro, etc) from the drop down boxes 6) Click on the specific make-model-engine combination from the classification page (looks like an NHRA class guide page) 7) You will see Stock-Super Stock classfication information. At the bottom of that classification information page is a button titled "GT Classes". Click on it. 8) Select the engine you want to use from the list that is displayed and click on the button "Classify" 9) Ta-dah! All the GT classifications with weights, classes and indexes for each eligible classes. ![]() |
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#2 |
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Dwight, you've been commended on other threads for this great tool and in my futile attempt to find a traditional SS car within my budget I have started to get more serious about making it a GT class car in order to use some of my inventory. The tool you created is absolutely phenomenal in terms of time savings for the racer looking to find a good competitive GT combo. Thanks!!!
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Jim Carter 2340 Super Stock 2340 SST/2340 Stock Set another place at the table |
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#3 |
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Gee thanks, Jim! I'm humbled by the complement.
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#4 | |
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I agree, thank you for this tool. Sean
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Sean Marconette 84 Mustang 5060 SS/N |
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#5 | |
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#6 |
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Dwight this is a great tool and maybe I'm missing something but what if you have a replacement head and NHRA has added hp how do you look that up?
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Rusty Gillis Former NHRA SS/FA and SS/GA record holder |
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#7 | |
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I see , for instance a 66 Chevy II, 2 dr sedan with a 283 , can run three classes in SS, but five classes in GT. Then if the hp rating is lower in GT, you can get back to the weight break where you were in SS , at a lighter weight than when you left, with the same index. Does this make any sense to anybody? Also , seeing GT class was formed to allow a different year engine than the body you are using, would you have to claim the 283 as a 65 engine, or don't they care about that either?
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"We are lucky we don't get as much Government as we pay for." Will Rogers |
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#8 |
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Mark,
Where you need to pay attention is the min and max combo weight calculations in GT, as you are only allowed to be 250lbs above and below the natual class, at least that what I have found. It's a very helpful tool to play with what combo's could work, and what not to build! Dwight has really made looking at combos very easy. Thanks Dwight! Sean
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Sean Marconette 84 Mustang 5060 SS/N Last edited by Sean Marconette; 07-16-2015 at 02:57 PM. Reason: Corrections |
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#9 | |
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I don't think you can the 383 in GT since it doesn't have a rating for GT, just superstock. The 340, and 340 six pack has ratings. Also 340's from other years. This may not help, but here is the 1970 dodge page from the classification guide. If you are able to run that motor, please let me know, it would truly open up a lot of options for other Mopar racers. DODGE 1970 198 225 225 318 318 340 340 340 340 340 383 383 383 383 383 * ** * ** * ** * * ** * ** * ** A A Auto Stick 125hp 145hp 145hp 230hp 230hp 275hp 275hp 290hp 290hp 290hp 290hp 330hp 330hp 335hp 335hp DART 111 Sedan 4 Dr 22.40 20.74 19.31 15.62 14.81 Sedan 2 Dr Swinger 22.36 20.70 19.27 15.59 14.79 10.48 11.15 Sedan 2 Dr Custom 22.28 20.62 19.20 15.54 14.74 Sedan 4 Dr Custom 22.40 20.74 19.31 15.62 14.81 CHALLENGER 110 Sedan 2 Dr Hdtp 22.04 20.52 16.08 15.25 10.51 11.18 10.93 10.90 10.72 10.72 10.72 Sedan 2 Dr TA 9.59 9.83 9.53 Convertible 22.89 21.31 16.70 15.84 10.89 11.59 11.12 11.29 11.11 11.11 11.11 Coupe 2 Dr Hdtp 22.12 20.59 16.14 15.31 10.54 11.21 10.96 10.94 10.76 10.76 10.76 CORONET DELUXE 117 Coupe 2 Dr 22.89 21.31 17.24 16.36 11.55 11.53 11.33 11.33 11.33 Sedan 4 Dr 23.11 21.52 17.41 16.51 11.65 11.63 11.44 11.44 11.44 Sta Wag 2S 26.56 24.73 19.73 18.72 13.26 13.21 12.99 12.99 12.99 CORONET 440 117 Coupe 2 Dr 22.96 21.38 17.29 16.41 11.58 11.56 11.37 11.37 11.37 Sedan 2 Dr Hdtp 23.15 21.55 17.43 16.54 11.67 11.64 11.45 11.45 11.45 Sedan 4 Dr 23.19 21.59 17.46 16.56 11.69 11.66 11.47 11.47 11.47 Sta Wag 2S 26.61 24.77 19.77 18.75 13.28 13.22 13.00 13.00 13.00 Sta Wag 3S 27.12 25.25 20.14 19.11 13.52 13.46 13.24 13.24 13.24 CORONET 500 117 Sedan 2 Dr Hdtp 17.32 16.43 11.60 11.57 11.38 11.38 11.38 Convertible 18.05 17.13 12.05 12.03 11.83 11.83 11.83 Sedan 4 Dr 17.53 16.63 11.74 11.71 11.51 11.51 11.51 Sta Wag 2S 19.64 18.64 13.08 13.04 12.82 12.82 12.82 Sta Wag 3S 19.89 18.87 13.31 13.25 13.03 13.03 13.03 CHARGER 117 Sedan 2 Dr Hdtp 24.04 22.38 17.96 17.04 12.01 11.98 11.78 Sedan 2 Dr Hdtp 500 24.04 22.38 17.96 17.04 12.01 11.98 11.78 S/SS Factor 125 135 145 185 195 299 281 328 320 330 290 295 300 300 300 6.28.05 6.28.05 8.26.03 1.1.07 7.8.04 2.13.06 6.2.03 5.30.02 6.2.03 5.30.02 GT Factors 288 SS Factor w/replacement heads 286 335 10.27.07 10.27.07 GT Factor w/replacement heads 293 335 10.27.07 10.27.07 A - P5007140 replacement head for SS only * = Stock Factor
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Eric Merryfield 1883 STK |
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#10 |
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Eric, this is untrue. You can run the 383 in a SS/GT class. You would use the same SS factor as defined for a non-GT. The only time there is an entry in the classification guide specifically for GT is when the AHFS has made an adjustment on a particular engine when it is used in a GT application. The more popular engines used in GT classes are more likely to have a GT specific factor, but only because there has been more opportunity to get hit. All of them started out as regular SS factors and have been enhanced sometime in the past.
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Bill Harris ex 2172 STK ex 2272 S/S |
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