Mackpro Posted February 14, 2023 Share Posted February 14, 2023 Your definitely on the low side of specs on boost pressure. Quote Link to comment Share on other sites More sharing options...
Bluebulldog Posted February 14, 2023 Author Share Posted February 14, 2023 1500 is 65mph. But you better have a tail wind or down hill when you’re loaded if you’re going to worry about 65😬 Quote Link to comment Share on other sites More sharing options...
880joe Posted February 14, 2023 Share Posted February 14, 2023 I can get 38 out of my 355/380 Quote Link to comment Share on other sites More sharing options...
Jody Scott Posted Tuesday at 08:24 PM Share Posted Tuesday at 08:24 PM On 2/9/2023 at 6:42 AM, Mackpro said: What the model and last 6 of the VIn? I can look the actual specs up of your truck/engine. The 355/380 has the same torque as a 427. On some year models of the 355/380 just adding the 427/460 injectors ( possibly turbo as well) will boost the Hp over 500. The 355/380 usually have smaller injectors but the software/data file manipulates the EUP’s for a larger fuel charge to get the 427 like torque readings. Bumping up to the larger 427/460 injectors really improve things. I have to find my notes on this when I get to work. I read on here someplace that if you up the program to a 380/410 hp and increase the injector size it will really improve the performance. Have you come across a combination like that before? Quote Link to comment Share on other sites More sharing options...
880joe Posted yesterday at 01:17 AM Share Posted yesterday at 01:17 AM The 380/410 program came on newer trucks than I'm running so I don't have any experience with it but the bigger injectors livened up the early etech My guess is they would help the newer one's also 1 Quote Link to comment Share on other sites More sharing options...
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