4.8L Project Horsepower - One step at a time

[farmtruc]

that ... about the same torque. very interesting

Here's the next dyno. This is running 87oct and tuned.
HP is decent, but torque is better!
What you'll feel when you hit the gas is the 20+tq across the power band.

Max Torque increase is 20tq at max torque.
Max HP increase 11hp.
The most notable thing is, power has increased across the entire power band with 87oct

Dyno results Tuned:


(note: the a/f gauge isn't hooked up and doesn't interface with the dyno computer)

[farmtruc]

Ok, next dyno.

Not much to write about. We added a UPD cold air intake.
This setup utilizes the stock bottom air box. We cut a hole in it to allow more air to enter, than what the fender allows.

HP gain is typical. Added 5hp.



Next: Cam was installed today 03-18-09.
We'll dyno it tomorrow then install the longtube headers, then dyno once again.

If you guys are interested, we're installing a 3600 yank converter as well, we'll compare the hp loss when this is added.
Even though hp decrease is expected, 0-60 and 1/4 mile times will improve signficantly.

Stay Tuned,
allen

[George C]

very nice numbers!!!! seems to be my lack of compression and man stick suffers vs that chart at 4k.

you get that cam and LTs on the 4.8 and i bet it rips

[SlvrSierra]

Very cool, a realistic build w/ real #'s to back up the gains of each part. Subscribed....

[CHEVROLADE]

damm nice,but link dont work

[GasGuzzler]

See George. Stock 4.8 with a hella lot less miles than my V6 has 10 more TQ and 40 more HP at the wheels. Not much different STOCK.

[George C]

See George. Stock 4.8 with a hella lot less miles than my V6 has 10 more TQ and 40 more HP at the wheels. Not much different STOCK.

i was talking flywheel not wheelhp

[GasGuzzler]

Hence my mentioning my six making 162 0r 163 wheel power on a 170 flywheel rating.

[George C]

Hence my mentioning my six making 162 0r 163 wheel power on a 170 flywheel rating.

mine said 180 or was it 190 who cares about them v6s they are DDs

[GasGuzzler]

Yep...and yours being a 4WD and a different year it prolly has more. Is yours an X or a W?