3/4 Ton 2005 Suburban Hop Up
10-10-2017, 10:03 PM
#1
Staging Lane
Thread Starter
3/4 Ton 2005 Suburban Hop Up Getting my 2005 Suburban 2500 hopped up this weekend. It has almost 200k miles but doesn't use oil, leak or show any signs of wear. Took it to a shop for a before dyno pull. It put down 260 hp dead even and over 280 ft-lbs! No power above 5k rpm which I expected for stock. A solid baseline for a high mileage truck.
Parts to go in:
Brian Tooley Stage 3 Truck Cam. Specs are 218/224 .553/.553 113+3.
LS6 valve springs
New pushrods
Speed Engineering 1-7/8 inch headers
Dual 3" Magnaflow exhaust with manual cutouts and X pipe
E fans with 160 thermostat to replace the stock clutch fan
Powerbond Underdrive Pulley
Tune by AMP Performance
I'm thinking 340 hp after? Your thoughts, America?
Parts to go in:
Brian Tooley Stage 3 Truck Cam. Specs are 218/224 .553/.553 113+3.
LS6 valve springs
New pushrods
Speed Engineering 1-7/8 inch headers
Dual 3" Magnaflow exhaust with manual cutouts and X pipe
E fans with 160 thermostat to replace the stock clutch fan
Powerbond Underdrive Pulley
Tune by AMP Performance
I'm thinking 340 hp after? Your thoughts, America?
10-10-2017, 10:42 PM
#2
TECH Senior Member
Why did you post in 2 forums?
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01-31-2018, 09:18 PM
#9
Staging Lane
Thread Starter
Sorry for the delay! I totally forgot to update you guys. Short answer:
325 HP and 343 lb-feet. Dyno graph attached.
Mind you the drive shaft failed at that point and and made everyone crap their pants. I can tell you it pulls great now at every RPM. The cam makes a torque down low as well as up top. After driving it for a couple months now it is rock solid. The only racing it has seen was a 6.2 swapped 2012 F-150 that got to see my tail lights from a roll of 50-100.
Minor annoyances. The e fans always run because the ECU was programmed to kick on at 160. The underdrive pulley makes the lights dim when you roll up a window at night. I drive faster so gas mileage is basically 14 mpg now, and on premium. Costco gas is my new friend.
Next up this summer, most likely a 243 head swap with NBSS/TBSS intake. Possibly a 4.10 limited slip rear. We shall see. And no, this will keep the factory torque converter as it is a daily driver and used for towing occasionally.
325 HP and 343 lb-feet. Dyno graph attached.
Mind you the drive shaft failed at that point and and made everyone crap their pants. I can tell you it pulls great now at every RPM. The cam makes a torque down low as well as up top. After driving it for a couple months now it is rock solid. The only racing it has seen was a 6.2 swapped 2012 F-150 that got to see my tail lights from a roll of 50-100.
Minor annoyances. The e fans always run because the ECU was programmed to kick on at 160. The underdrive pulley makes the lights dim when you roll up a window at night. I drive faster so gas mileage is basically 14 mpg now, and on premium. Costco gas is my new friend.
Next up this summer, most likely a 243 head swap with NBSS/TBSS intake. Possibly a 4.10 limited slip rear. We shall see. And no, this will keep the factory torque converter as it is a daily driver and used for towing occasionally.
02-01-2018, 12:06 PM
#12
TECH Senior Member
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Not so much even that, the move to 5 inch ups your critical speed, basically at what speed the DS self destructs. Good choice. Ive got a 4 inch .120 wall one in my 2wd converted Denali.