skewing the dyno??

[fishmens67]

Show us some pictures of your dyno. We love pictures around here.

 

[fishmens67]

chassis dyno

 

[Dart Frog]

chassis dyno
View attachment 1716375292

Now that's some chassis Dyno flogging I could definitely get behind!

 

[Oldiron440]

I found a picture of a good butt dyno it’s even loaded with BS…

 

[Newbomb Turk]

I found a picture of a good butt dyno it’s even loaded with BS…

View attachment 1716376258

Most accurate butt dyno I’ve ever seen!!

 

[BSB67]

That's funny because when I dyno'd my engine I gained 26 hp from a header swap, 2 inch to 2 inch / 2-1/8 step headers ....then I wanted to run the exhaust as it would be in the car, so we removed the dyno exhaust....it picked up another 25 hp.... So, that's a 51 HP pick up total.
There was no messing with anything except for removing a restriction.
I'll be putting this engine back on the Dyno soon if you need proof.

What horsepower level you at?

 

[MOPARMAGA]

What horsepower level you at?

685 now, doing a little more fixing and a solid roller cam ...be back on the dyno pretty soon.

 

[MOPARMAGA]

I will when I get home. I have some on my phone but they aren’t too good.

Screw it. I’m sitting at the bank with my mom. When we finish here and I get back to the house I’ll look through the pictures on here and post the best of what I have.

I may have some videos on here too buck I know those suck buttermilk

here's one, with my jsc aboard.

 

[Newbomb Turk]

View attachment 1716376727here's one, with my jsc aboard.

I’m pretty sure the dude in the hat was saying this^^^^^^^^

 

[BSB67]

685 now, doing a little more fixing and a solid roller cam ...be back on the dyno pretty soon.

Pretty surprising that there was 51 hp between different large headers at the power level.

 

[Newbomb Turk]

Pretty surprising that there was 51 hp between different large headers at the power level.

No its not.

 

[MOPARMAGA]

Pretty surprising that there was 51 hp between different large headers at the power level.

2 inch with primary tubes as long as the fw hookers are big restriction.
I fairly certain I could make another 25 hp with 2.25 primary headers.
But, I don't think I'll fit those in the car as simple as the tti headers.

 

[MOPARMAGA]

View attachment 1716376730

I’m pretty sure the dude in the hat was saying this^^^^^^^^

I heard it a thousand times lol

 

[dukeboy440]

People dont listen. Engine builders with dynos tend to exaggerate numbers, just like head porters with flow benches do. Yall remember MRL? that was the biggest lier I ever saw post on the internet.

What ever came of him? Karma catch up?

 

[92b]

2 inch with primary tubes as long as the fw hookers are big restriction.
I fairly certain I could make another 25 hp with 2.25 primary headers.
But, I don't think I'll fit those in the car as simple as the tti headers.

I thought the difference between headers was 26 hp and the additional 25hp came when you removed the dyno exhaust. I might have that wrong. How exactly did you test that?

 

[MOPARMAGA]

I thought the difference between headers was 26 hp and the additional 25hp came when you removed the dyno exhaust. I might have that wrong. How exactly did you test that?

That's correct. I think a great set of headers could be worth another 25 hp is what i meant.
We did a few tests after break in and the tune was where it looked good.
Then swapped headers added 26 hp. Then I noticed something and wanted to see if my theory was correct and that's when I decided, unhook the Dyno exhaust and run without. That was 25 more hp