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For those of you in the know... need some engine particulars

what heads are on a 5.7 drag pak engine?

Are they new eagle heads or a 6.1 head, or what?

What pistons are used in a stock drag pack? Diamond? JE?


Do they come with a solid or hydraulic roller? If solid what rocker gear?

Would a 96 dakota with a 5.7 hemi be able to fit in SS/TA or GT class?

thanks in advance...Justin



I don't much about the specifics of the engine but I can tell you that these engines are legal for the TA and GT truck classes. With the minimum weight in TA I would think this engine would be better suited for TB which is a SB only designation if my memory serves me right. The downside to TA and TB is that they are carb only classes. TA mandates an 850cfm carb and TB mandates a 750cfm carb and both classes have an 8.5lbs per cube weight factor. I forget what the minimum weights are but other than the carbs, you can pretty much run whatever else you want. No rotating assembly restraints or head restraints but you will have to kick some rpms and make some good power in these classes to run well as the current standard for both of those is 9.00 and faster for the most part(at least 9.20's). In the GT truck classes you would run the engine according to stock specs within NHRA guidelines except that you aren't limited in vavletrain or intake manifold. You will however have certain restrictions to maintain. C.R., a certain port volume, stock sized valves, standard efi system, spec rods, and spec pistons, all of which have to mach certain specs and weight. It sounds more technical than it is but those are just some of things you have to face in putting together the engine. On the bright side of things though, the GT HP ratings for the 5.7 and 6.1 are untouched and both ratings are softer than a brownie, especially the 5.7. 305 HP rating would put you on the minimum weight for most of the class designations. You could probably run GT/TC or TD and still run on the minimum weight. Its definitely got some potential and wish you nothing but blessing going forward. I personally hope you decide to run TA as I would like to see what these engine could do when transformed into a high winding rpm all out modified style engine.

NHRA Accepted product list:
http://www.nhra.com/userfiles/file/NHRAAcceptedProducts.pdf

NHRA 09 and 10 Blueprint Specs:
http://www.nhra.net/tech_specs/engine/blueprints/CHRY-09.rtf

http://www.nhra.net/tech_specs/engine/blueprints/CHRY-10.rtf

Current GT factors:
305 for the 5.7
385 for the 6.1
275 for the 360

Adriel Paradise
Substation Design Engineer III