A drop like that in bsfc is like saying the engine is 16-28% more efficient without accessories... So if it had accessories it would have made about 300 hp less?

edit: just noticed you said drivetrain as well but either way, doesn't loading the engine on the dyno simulate this to a certain degree? I don't get the argument that the bsfc number changes depending on whether you're talking flywheel or rear wheel numbers... My understanding is that the bsfc is what it is for the engine, you just have to take into consideration drivetrain losses if measuring it that way.

 

The BSFC number doesn't change based on what is hooked to the engine, I meant overall. Power is consumed by the accessories and drivetrain normally, but on their setup on the engine dyno with nothing for accessories, all of that power is useable horsepower which is what the engine dyno measures.

 

I think i punched some numbers in wrong. For those 75lbers to support the 1200hp (crank not to the tires) at 80% duty cycle the BSFC had to be around .46-.48 (high revving N/A all out race motor are the only ones EVEN COMING CLOSE to that number), which is darn near impossible, and stupid to do on a stock motor for that the conditions present to make that low of number would be to hard on the motor. At an "average" BSFC of .65 it would need at least 100lb injectors to support it, and thats still crank horsepower with 80% duty cycle, which is why the mag is total BS. Now if they used a rising rate fuel pressure reg higher than a 1:1 than maybe...

How much they gaining by not using accesories, 20 maybe 30hp?

 

I have a 2004 chevy 2500hd with a stroked 408 ci motor in it that i sled pull with. i am having problems with the computer cutting off around 7500 to 7600. Ihave hp tuner on it and my tuners cant figure it out y it is doing this if any one could help please do. you can b data loging the run and when the ecm cuts out it shuts the log off to so therfor is shows no codes . it kind hard to explain in here but if anyone know what it could be call me and i could explain it to you better 252-312-8937 my name is chris thanks

 

You should write or call them and tell them there are a bunch of skeptical inquiring minds on this forum who want to pick their brains about it lol.

 

I just want to go on record saying that I anticipate a rash of blown engines due to this article. Many people new to LSx engines are going to start pushing them and have no idea what they are doing....

 

All i know is HOT ROD is a BS mag with BS articles, just like most mags that just wanna sell stuff, heck many people have the LS VERY far, go on over to FI section LS1tech, PLENTY of people, HOT ROD just wanted to be cool, except they didnt add right and they got caught in there. I mean seriously, first they thought it was a 5.3, then it had a rusted cylinder, then later it turns out to be a 4.8? All of the 4.8/5.3's ive seen have a white dash across the 4.8 or 5.3 in the back, couldnt they have seen that from the beginning?

 

I don't think HotRod purposefully wrote a BS article like jeffrey is suggesting. Sounds a bit to conspiratorial IMO. What possible purpose would they have to create a bogus article that would ruin one of the longest standing names in Automotive mags?

 

Heres mine, no dash but a clearly marked crank.

 

ive never seen the "dash".......