1997 gmc k2500 burban

[yevgenievich]

Will get audio video. Feels a bit better with this set of mufflers. Torque converter lockup all of a sudden started coming in by 45mph instead of usual 55mph, which is likely due to less throttle.
But I did heavily under estimated initial noise reading. Very heavy bass sound until about 2k rpm. Resonators and running pipe all the way to the back needed.

 

[yevgenievich]

Returning to tuning trouble. Still need to find a tuner that can help with the temperature dependant parts as the same fuel trim cell will have a difference in correction almost 20% throughout standard operating range. But for now it is finally performing a bit closer to expected.

 

[yevgenievich]

Some more changes and debating if leave lock up as is or raise the limits. It gets to 4th gear and locks torque converter by 37mph on normal not in a hurry driving. Keeps on pulling without issues at the 1k rpm locked up, but will likely raise it a bit. Some wot runs so far not optimal fueling but it is getting in to low 6 sec 0-60 times. 1st gear tops out at 75mph...

 

[Reluctanse]

On the plus side, intake fits under the hood and points the right direction to use stock filter box.

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Maybe I missed it, what exact holley is that intake? Did that elbow come with it?
Setup is looking good!

 

[yevgenievich]

Maybe I missed it, what exact holley is that intake? Did that elbow come with it?
Setup is looking good!

Thanks. Elbow was an ebay special. Intake is for a tall deck. Fuel rails have special injector spacing that only this intake has.
Had some drizzle today and turns out in damp conditions drift mode works well.

https://www.holley.com/products/discontinued_product/parts/9901-204

 

[yevgenievich]

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Mufflers got warmed up.

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[OutlawDrifter]

Idles pretty rowdy!

 

[yevgenievich]

Lifter preload check while running. Had a balance code on one cylinder bank.

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[yevgenievich]

Got a hold of a used hd fan clutch. Slightly moved the thermal spring to see if can get it to start turning on earlier. The one I had looks to be in good shape but is a smaller standard duty clutch. Cleaned and rtv in place after taking a picture on the spring. Originally it wraps more with a tight 90* in to the slot.

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[OutlawDrifter]

Late model "severe duty" clutches are smaller in diameter than my OEM "heavy duty" unit.