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I feel the exact same way! I've always taken the sawzall to the muffler before the new car even comes off the trailer, but the 855 was just too much for me when I tried it on my 934. I now realize that there was something funny about the acoustics of the 934 with the pipe being between the cab...

Awesome! Glad you stumbled up on this! So for my question about exhaust placement - does your stack being in front of the window vs. behind like on a 900 series make it unbearable for long trips? I definitely had to have my Deuce's RH window rolled up if I was driving it more than 10 miles, or...

I love it! Thank you for sharing all of this! But don't you mean they made the best HP at 2000 RPM? Torque was rated at 1300 RPM.

Oh, good catch! Now I'm just plumb confused. The engine I bought says it's a "small cam". "Formula 290" is on the intake manifold. So maybe it had a manifold swap, or maybe they've mislabeled it as a small cam. I guess I'll find out next week when I get it in the shop.

Still waiting for someone to comment on that 1978 article about RPM.... So the next question coming to my mind is MPG. Assuming 14R20 tires on everything to compare apples-to-apples, what is everyone getting? On the same trip back from Kansas, my 8.3 got 12mpg (923). The 14L's ranged from 8-11...

That contradicts every thread I've read (on this forum and others) about the NHC-250's in the past 24 hours. They all say do not exceed 200 psi. One went into detail about the size difference (2" vs 2.5") and how the smaller cam lobes tend to shear off. I'll stick with the majority on this one...

I spent all of last night reading thru 4 very long threads, and have them jumbled, so I'm not sure if it was written in this one or not but... DO NOT RUN OVER 200 PSI FUEL PRESSURE as anything more than 200 will shear off the cam lobes on the Small Cams. The 290 I bought is locked up, hence why...

And for anyone wanting video (because this isn't a thread without video!), here are some of the best links I've found:

To summarize everything in this thread to this point: Plumbingbuddy claims he’s running cool with a #5 and no turbo – this is hard to believe. Jdknech says he is running a #15 with turbo and can get things warm sometimes. 162tcat is running a #20 and turbo and had no complaints of heat but...

I realize it's 2022 and everyone gets offended by anything, but take it easy - it's a joke

This many of you have turbo'd your 250's and no videos to be shown!?!? Y'all need to grow up! What is the consensus on numerically-lowest fuel button to run? #15 ?