Header and Supercharger Dyno Testing

[JennaBear]

We are getting ready for some more dyno test comparisons: Headers and supercharger

Test vehicle: 2013 6.2L.
Dyno: Mainline

Will be comparing Doug Thorley 1-5/8" to 1-7/8" with their 3" y pipe on both and then repeating the testing with a Magnacharger TVS1900 with 3.3" 3.0" pulleys.

Naturally aspirated testing will be performed on a detuned calibration to ensure that no fuel quality issues can interfere with results.

We will be able to directly compare the airflow changes between the two sets.

 

[YukonXL04]

Awesome!!

 

[CHOO CHOO]

Subscribed!!!

 

[felixgun]

 

[JennaBear]

Preliminary results from yesterday were that both sets of headers have their place in a 6.2L. The 1-5/8" made more power than the 1-7/8" until around 4500rpm and the 1-7/8" pulled stronger to the shift point (and beyond). At 6000rpm, the 1-7/8" made nearly 10% more horsepower than the 1-5/8" set.

Blower testing had to be put on hold due to traction issues on the dyno (set up for front wheel drive) and we ran out of time to move the components around yesterday.

 

[livingez_123]

were the Dougs headers the tri Y? or just 4 into 1?

so the 1 5/8" header would be a better towing header?

 

[JennaBear]

They are tri Y, and they would absolutely be a better towing header.

 

[livingez_123]

they make them for the 01 Denali?
what kind of cost would they be?

 

[JennaBear]

Here is the resulting dyno graph comparing the two headers on an otherwise stock 6.2L. Pay attention to the percentage differential between the two, rather than the absolute power numbers. The same truck strapped down to the dyno differently with a slightly more aggressive tune puts out 50hp more. Blue run is the 1-5/8" and red is 1-7/8". Both are utilizing DT's 3" stainless steel y-pipe. Both runs had coolant temp of 192*F at the start and intake temps of 102*F for an even comparison.



---------- Post added at 02:23 PM ---------- Previous post was at 02:10 PM ----------

they make them for the 01 Denali?
what kind of cost would they be?

They do. I believe the guys are running a Black Friday special on DT headers, not sure on the pricing.

The sale will be posted here:

http://store.blackbearperformance.com/