The_Family_Tahoe
I'm Awesome
Could use your help.
Long story short I want to boost the 1999 L31 Tahoe and use it as a daily driver. I need feedback on the best way to manage efi under boost. I see a lot of customization to the efi tune is possible with a 0411 swap and this allows for use of the original gauge cluster and transmission control in the 1999 model obs.
First question:
For a daily driven 1999 obs what is the best boosted engine control option for me, with no tuning experience:
1. The 0411 swap with hp tuners
2. A more automated learning controller like:
a. the edelbrock proflo piggybacking on the 0411 for transmission control
b. Holley terminator x max with transmission control, but how do I keep factory gauges?
c. Is there another method to control boosted L31 with efi?
I want big low end torque and driveability over top end hp. I'm visualizing 600 lbs of torque and less than 700 hp flywheel hp. Given these power numbers I don't think the L31 factory equipped intake manifold injection is sufficient. I have learned the fuel injection spider is problematic and doesn't lend itself to boost because fuel flow is not easily increased without the purchase of an expensive high flow spider. Given this limitation inherent to the factory injection, if this limitation is correct, what intake manifold type would you recommend that uses more common high impedance fuel injectors?
Additional context:
a. Need to keep factory climate control
b. Camshaft will be less than 216 intake duration, likely 205 or 212
c. Would rather not give up cruise control, and willing to consider aftermarket options
d. 76 mile daily commute and the idea of boosted small block cruise mpg is desired over a big block with comparable power numbers. I already that with another vehicle and my fuel bill would be absolutely outrageous with this commute, so much so that I bought a used Acura for commuting before I found this Tahoe
e. Very likely swap to 4L80e after boost is added and bugs are worked out with efi management
f. I'm using an already sourced gt45 turbo and Martin turbo exhaust manifold, these costs are 6-years-sunk
Long story short I want to boost the 1999 L31 Tahoe and use it as a daily driver. I need feedback on the best way to manage efi under boost. I see a lot of customization to the efi tune is possible with a 0411 swap and this allows for use of the original gauge cluster and transmission control in the 1999 model obs.
First question:
For a daily driven 1999 obs what is the best boosted engine control option for me, with no tuning experience:
1. The 0411 swap with hp tuners
2. A more automated learning controller like:
a. the edelbrock proflo piggybacking on the 0411 for transmission control
b. Holley terminator x max with transmission control, but how do I keep factory gauges?
c. Is there another method to control boosted L31 with efi?
I want big low end torque and driveability over top end hp. I'm visualizing 600 lbs of torque and less than 700 hp flywheel hp. Given these power numbers I don't think the L31 factory equipped intake manifold injection is sufficient. I have learned the fuel injection spider is problematic and doesn't lend itself to boost because fuel flow is not easily increased without the purchase of an expensive high flow spider. Given this limitation inherent to the factory injection, if this limitation is correct, what intake manifold type would you recommend that uses more common high impedance fuel injectors?
Additional context:
a. Need to keep factory climate control
b. Camshaft will be less than 216 intake duration, likely 205 or 212
c. Would rather not give up cruise control, and willing to consider aftermarket options
d. 76 mile daily commute and the idea of boosted small block cruise mpg is desired over a big block with comparable power numbers. I already that with another vehicle and my fuel bill would be absolutely outrageous with this commute, so much so that I bought a used Acura for commuting before I found this Tahoe
e. Very likely swap to 4L80e after boost is added and bugs are worked out with efi management
f. I'm using an already sourced gt45 turbo and Martin turbo exhaust manifold, these costs are 6-years-sunk