Smallest/fastest spooling turbo for stock 5.3? 400-450hp
Sep 25, 2022 | 12:27 AM
#11
DuNnO
Joined: May 2018
Posts: 1,285
Likes: 580
Huron Speed says Borg S366 is no-go on their manifold/downpipe.
Given choice between VSRacing 70/70 Billet Gen2 and a AGP Z2 65-65 Billet Which one would give LONG TERM daily driver service on a 5.3 in stock geared (3.73 ) Suburban...?
Looking for good driveability, quiet stock-like exhaust quality, and around 500 ish horsepower on LOW Grade gasoline.
Cam is a TSP 208/214 .550" stock compression. Not looking to set any records, never going racing, just want to have a bit more steam under the go pedal.
.
Best easily available road fuel here is nominally 90 Octane, but outside the big cities, and off the PAVED roads, 87 octane is all you can find.
Given choice between VSRacing 70/70 Billet Gen2 and a AGP Z2 65-65 Billet Which one would give LONG TERM daily driver service on a 5.3 in stock geared (3.73 ) Suburban...?
Looking for good driveability, quiet stock-like exhaust quality, and around 500 ish horsepower on LOW Grade gasoline.
Cam is a TSP 208/214 .550" stock compression. Not looking to set any records, never going racing, just want to have a bit more steam under the go pedal.
.
Best easily available road fuel here is nominally 90 Octane, but outside the big cities, and off the PAVED roads, 87 octane is all you can find.
Your not going to get 500hp on 87 octane. My 1991 truck with a S475 on a 5.3 i was able to run 87 octane on 6psi but had to pull a ton of timing to keep it happy compared to 93 octane.
It would be ok for daily driving and if the tune is good you could haul with it.
On my original turbo truck all i ran was 93 cause it wasnt expensive back then. 6-8psi was about perfect for towing and Daily driving.
Dec 9, 2022 | 08:15 PM
#13
TECH Regular
Joined: Sep 2015
Posts: 484
Likes: 76
I have PLENTY of fuel.... and not scared of manifold pressure.
Most retail pumps IN THE CITY have 90 octane, but down the highway, out of town, the little card-lock trucks stops for damn sure only have a single pump for gasoline, and it's 87 octane.
SO, I would build and TUNE my Low octane table for continuous safe operation at 87 Octane, and, presumably my high octane table would take advantage of my NORMAL operation on 90 octane.
. Probably should be possible to make good power, driveability and not stress lower end components within the range of 10 to 12 PSI manifold pressure.
Still comes back to an ideal choice of single turbocharger for ROAD use in a heavy vehicle, presumably a smallish compressor will be enough for a 5.3 Liter that doesn't plan to race, nor spin much RPM in normal use.
Would an AGP Z2 62/65 or 65/65 be UNDER size ?
Most retail pumps IN THE CITY have 90 octane, but down the highway, out of town, the little card-lock trucks stops for damn sure only have a single pump for gasoline, and it's 87 octane.
SO, I would build and TUNE my Low octane table for continuous safe operation at 87 Octane, and, presumably my high octane table would take advantage of my NORMAL operation on 90 octane.
. Probably should be possible to make good power, driveability and not stress lower end components within the range of 10 to 12 PSI manifold pressure.
Still comes back to an ideal choice of single turbocharger for ROAD use in a heavy vehicle, presumably a smallish compressor will be enough for a 5.3 Liter that doesn't plan to race, nor spin much RPM in normal use.
Would an AGP Z2 62/65 or 65/65 be UNDER size ?
Dec 10, 2022 | 12:49 AM
#14
DuNnO
Joined: May 2018
Posts: 1,285
Likes: 580
Dec 10, 2022 | 12:50 AM
#15
DuNnO
Joined: May 2018
Posts: 1,285
Likes: 580
I have PLENTY of fuel.... and not scared of manifold pressure.
Most retail pumps IN THE CITY have 90 octane, but down the highway, out of town, the little card-lock trucks stops for damn sure only have a single pump for gasoline, and it's 87 octane.
SO, I would build and TUNE my Low octane table for continuous safe operation at 87 Octane, and, presumably my high octane table would take advantage of my NORMAL operation on 90 octane.
. Probably should be possible to make good power, driveability and not stress lower end components within the range of 10 to 12 PSI manifold pressure.
Still comes back to an ideal choice of single turbocharger for ROAD use in a heavy vehicle, presumably a smallish compressor will be enough for a 5.3 Liter that doesn't plan to race, nor spin much RPM in normal use.
Would an AGP Z2 62/65 or 65/65 be UNDER size ?
Most retail pumps IN THE CITY have 90 octane, but down the highway, out of town, the little card-lock trucks stops for damn sure only have a single pump for gasoline, and it's 87 octane.
SO, I would build and TUNE my Low octane table for continuous safe operation at 87 Octane, and, presumably my high octane table would take advantage of my NORMAL operation on 90 octane.
. Probably should be possible to make good power, driveability and not stress lower end components within the range of 10 to 12 PSI manifold pressure.
Still comes back to an ideal choice of single turbocharger for ROAD use in a heavy vehicle, presumably a smallish compressor will be enough for a 5.3 Liter that doesn't plan to race, nor spin much RPM in normal use.
Would an AGP Z2 62/65 or 65/65 be UNDER size ?
Jun 12, 2024 | 11:48 PM
#18
TECH Regular
Joined: Sep 2015
Posts: 484
Likes: 76
Settled on VSR 7875 Billet.
Installed on Huron Speed manifold. 5 heat cycles, 6 coats of VHT flat black ceramic paint on Turbine.
Need to make a few ECM connections: 4L80 VSS pins, Electric fan pins, and IAT sensor. six wires to poke into the PCM, and then plug in some Deatschwerks 60# injectors. Getting close to TUNE-Time.
Installed on Huron Speed manifold. 5 heat cycles, 6 coats of VHT flat black ceramic paint on Turbine.
Need to make a few ECM connections: 4L80 VSS pins, Electric fan pins, and IAT sensor. six wires to poke into the PCM, and then plug in some Deatschwerks 60# injectors. Getting close to TUNE-Time.
Jun 26, 2024 | 07:18 PM
#20
TECH Regular
Joined: Sep 2015
Posts: 484
Likes: 76
VSR 7875 is driving okay, idling pretty smooth with the Deatsch 60#
Havent gone too heavy into throttle yet, 140 kPa is holding good safe AFR 11.4 with the STOCK fuel pump, which is ... Kind of hard to believe.
Need to drop the AEM 340lph in there before I melt any pistons.
Havent gone too heavy into throttle yet, 140 kPa is holding good safe AFR 11.4 with the STOCK fuel pump, which is ... Kind of hard to believe.
Need to drop the AEM 340lph in there before I melt any pistons.
