Why does every tuner with a dyno tell me that their dyno is stingy on final horsepower numbers? Why do different dynos give you different power rating? You would think that a dyno is a dyno, but evidently that is not true. How is someond supposed to know how much power their vehicle is really making? Is it possible that the tuner is just using that excuse for his final horsepower? An inch is a inch and a foot is a foot. Why so many different dynos put out different horsepower ratings? Just wondering.

 

Lots of info on this online. Every machine is different. You can take 10 brand new cars put them on a track and race them. One will be faster. Yes some dyno operators say this as nothing more then a sales pitch so you will feel really good about whatever the results are. If someone told you there dyno was notoriously high you would likely be pissed at any results because you would already have it in your mind that the results are over rated.

But with the dynos atmospheric conditions play a role as does the calibration of the dyno itself. As I've said before, at the end of the day dyno numbers mean nothing. Absolutely nothing. They look good in a sig and thats about it. The numbers that matter are the ones you lay down at the track. You can have a vehicle thats a dyno queen and at the same time have it's *** handed to it on the track. Peak power looks good on paper but only occurs for a split second.

 

Lots online I'm sure, but I value our members opinions and look forward to seeing them. Nice answer Twinscrewd and thanks.

 

different machines from different manufacturers, each calibrates to their own rules, their is no law or standard by which the machines are measured.

a before and after number are all you need. the dyno allows for a skilled person to do a safe tune.

if you fall in love with a dyno number you must be honest with yourself that all machines can be manipulated. people will tell you they cant, the expert say so. I say BS.

 

So you think you got more for your money and make you think that they are possibly a better tuner then they truly are. If I ever get my truck back from the body shop I hope to run her on the same dyno I have numbers from before to see the increase in power. While time of year and conditions will be different, the fact that its the same dyno should still be a good baseline.

 

Go buy 5 different tire gauges and test your tire pressure. 5 different numbers.
As long as you use the same dyno then you can tell if your mods are working.

 

I reckon I'll find out tomorrow what the fuel pump is gonna add. I have appointment with same tuner and same dyno to hopefully finish tune. I didn't think to ask about fuel lines and rails to see what they would handle cause tuner didn't mention changing those. I guess they are big enough aren't they?

 

Guess I'm in unchartered waters. Fuel pump may be overwhelming fuel regulator but not sure yet. It could be that it just happened to go bad. Aeromotive makes one but even they are not sure if it will work on my truck cause nobody has asked. It was working fine with 255 but not with 340. Shop has one on order to compare it to factory piece to see if it matches up. If that doesn't work, then it may need aftermarket fuel rails. Who knows what can be found that will fit my truck and lord only knows what that might cost.