Bigjohn4300

Got it, thanks

Ok, so basically 300/315 safe. Is a 78 a E-6?

Ok, need to live with 300 if i get it- thats what i needed to know....thanks!!

Im curious, how much power could a 78 era maxidyne motor make in a low hours/non work application? Engine in good shape, truck is basically a toy, maybe 1000 miles a year. 400 hp? What is its limiting factors?

Btw, the mechanic corrected me on the truck he had said was 3500, that was on a Mack tanker that rats got a hold of, that was under hood, in cab, and the pump panel, all new harnesses

A local dump trucker with a beautifl, super clean 07 Granite was going to work with me tomorrow hauling, but just told me he cant because his yellow "emission light" on the dash is lit up, and he said she doesnt pull worth a darn when its on. He says normally when it comes on, he shuts it down for a while and restarts it and all is well as long as the light it out. I questioned him about it, he says its not a MP motor, what light is he referring to? Is an 07 grey motor different than a 04?

Other than kinda sluggish initial throttle response due to the vocational emissions EGR on the CV series granites, pretty darn reliable truck i feel.

Let me try it, i run local, ill rent it and see how it does!

I’ve been contemplating trying one on my granite, what size turbo is yours based off of? I have a S467 on mine and it takes 2 gears from a stop to get it spooled up, 3rd gets me high teens, 4th gets me mid 30s. I really want to try one, but kinda leery now, your the only one that ive heard of with one on a Mack (225)266-6350 talk/text if you get time one day

880Joe, did you ever get the switchblade on and working? Im curious about one 2252666350

Thats bad?

No im pretty sure he was talking cost of harness, i think they had 5 hrs in harness changeout and some other miscellaneous items that time

It may well have been around there, i just remember my mechanic saying he had changed one previously that was like $3500 ish, so i was mentally preparing for that, and it was well less than half, so i was happy!

Sorry, been busy, ill go back and see, but i think it was around the low 1k area, but ill check

Well looks like we figured it out, engine harness! Changed the main on engine harness, not only cured the intermittent lag/low power, but also what everyone thought was a weak cylinder when cold, missed erratically until warmed up(we were prepping for a inframe OR a Etech swap, harness cured it. Im liking her a lot more!