DutchGrasstrack 804 Posted December 12, 2018 It's actually a GM NX. Most tuners test with it these days. 1 Share this post Link to post Share on other sites
Sings4Speedway 3,247 Posted December 13, 2018 Any ideas of the spec of the gm nx? apart from looking cool what are the advantages of this over the current crop of gm's. Share this post Link to post Share on other sites
IronScorpion 1,407 Posted December 13, 2018 He designed a new head/cam design this last Mar/Apr time which is the bottom, middle picture on his twitter page. https://twitter.com/pjrGM/ Share this post Link to post Share on other sites
Daniel Smith 5,661 Posted December 13, 2018 This is supposed to be as good as the current crop of GM's but PJR is going down the route of extended service life. Along the lines of the new Goddan and Gerhard. That's what I understand anyway. We'll just have to wait and see. 1 Share this post Link to post Share on other sites
IronScorpion 1,407 Posted December 13, 2018 Earlier this year, it was mentioned that GM & Jawa were developing engines with better oil circulation to extend service intervals. Share this post Link to post Share on other sites
