Posted by rtdkota,
"OK... finally got the truck dyno'd in the middle of my very busy schedule. I did various configurations of testing, this is on a NEW dyno, so I cannot validate the #s 100% accurate vs. my previous pulls, but feel that they give good information regarding true dual vs. single, plus the long tube vs. midlength headers. Anyone claiming anything over 25 rwhp increase over stock is stretching the truth; either they had a pinched exhaust to begin with, or they aren't stating where the increase is-- Peak? or just an increase over another curve... BIG difference... Some companies will state a 20+ increase of hp--- but it's not the peak #, or can simply be a spike at a certain (low) RPM which is pointless and can be thought of as false advertising."
Sam, I feel you are "stretching the truth" here. My truck did in fact post those numbers, but if you read the posts, I went from a stock Y pipe, (have you ever seen one?), to JMs longtubes with full 2.5" exhaust. That was the change, no attempt at "stretching the truth", a spike was not an issue either, but anyone that has ever seen a stock Y pipe, should believe those numbers.
I made one change, albeit a big one, changing the whole exhaust, but there is no attempt at skewing the data, or promoting or tearing down anyone's product. I presented the facts, some people didn't like the facts and tried to pick apart what I did. I showed my combination before and after and the average results, good or bad, never tried to influence anyone either way.
Unless someone takes a truck and under the same environmental conditions, the same dyno, and with no other change than the headers, all of these tests are arguable, but I won't have anyone say I'm "stretching the truth".
Brian
"OK... finally got the truck dyno'd in the middle of my very busy schedule. I did various configurations of testing, this is on a NEW dyno, so I cannot validate the #s 100% accurate vs. my previous pulls, but feel that they give good information regarding true dual vs. single, plus the long tube vs. midlength headers. Anyone claiming anything over 25 rwhp increase over stock is stretching the truth; either they had a pinched exhaust to begin with, or they aren't stating where the increase is-- Peak? or just an increase over another curve... BIG difference... Some companies will state a 20+ increase of hp--- but it's not the peak #, or can simply be a spike at a certain (low) RPM which is pointless and can be thought of as false advertising."
Sam, I feel you are "stretching the truth" here. My truck did in fact post those numbers, but if you read the posts, I went from a stock Y pipe, (have you ever seen one?), to JMs longtubes with full 2.5" exhaust. That was the change, no attempt at "stretching the truth", a spike was not an issue either, but anyone that has ever seen a stock Y pipe, should believe those numbers.
I made one change, albeit a big one, changing the whole exhaust, but there is no attempt at skewing the data, or promoting or tearing down anyone's product. I presented the facts, some people didn't like the facts and tried to pick apart what I did. I showed my combination before and after and the average results, good or bad, never tried to influence anyone either way.
Unless someone takes a truck and under the same environmental conditions, the same dyno, and with no other change than the headers, all of these tests are arguable, but I won't have anyone say I'm "stretching the truth".
Brian
