please share info on 2015 lt1

[rjw]

Hi

I`ve been out of tuning with hpt for years. last tune was an 03 z06 w/3.0L whipple on a modded 383 ls6...I did the engine rebuild, installs and tuning up to around 1000 rwhp.

Haven`t touched anything since

can anyone help bring me up to snuff on this gen 5 silverado lt1 which will be getting a 2.9l whipple?
for example,

1) does this have a map sensor on it? if so, details?
2) is ecu an e90?
3) any links to tuning procedures? engine/tranny, recommend steps to tune?

tia

[Higgs Boson]

1 yes
2 E92
3 Read forum, it's full of links to tuning

[rjw]

1 yes
2 E92
3 Read forum, it's full of links to tuning

1) ok, can I assume that stock map is a 1 bar? if so, not looking to make big power, so, can this stay or should it be upgraded?

3) been reading for 10 hours......now have extreme headache, but a better understanding of how different this will be as compared to tuning c5 vettes

while I have acquired some knowledge, any links to actual real world steps and in what order, would be nice

here is the current status

1) whipple tuner kit on its way
2) stock whipple tune donated by a member
3) Autometer wideband and boost/vac gauges on the way
4) 2 channel iat on its way
5) will get wb bung welded to exhaust.....any hints on best location would be helpfull
6) truck currently has a diablo tune with hopefully the stock tune in the diablo and intact....any thoughts or warnings on this?

one member has suggested getting a 3 bar map and having the baro sensor removed from maf..... any thoughts on this?

more to come

thoughts: seems like a lot of hair pulling went on when gen 5`s first hit the scene.....trying to not go thru more than needed

Can`t afford to invest in tuning school`s $800 anti, so will have to try and tough this out on my own....any help, links are appreciated

thanks in advance

[Higgs Boson]

www.dsxtuning.com for a baro breakout/ls9 map sensor
update the tune to reflect the different sensors

read up on how the torque model works in many of the threads

also read this:
https://www.hptuners.com/help/vcm_ed...vanced_e78.htm

[rjw]

www.dsxtuning.com for a baro breakout/ls9 map sensor
update the tune to reflect the different sensors

read up on how the torque model works in many of the threads

also read this:
https://www.hptuners.com/help/vcm_ed...vanced_e78.htm

1) spoke to dsx and they couldn`t confirm that their harness, would work on this vehicle ( they are vette specific)
2) read a lot about problems, but kind of looking for where to start and order of checking/adjusting things
3) read the link and still digesting

thx

[schpenxel]

I would see if they'll let you return the harness if it doesn't fit that vehicle.

[rjw]

I would see if they'll let you return the harness if it doesn't fit that vehicle.

they will take it back, but the gentleman (jeff) told me that the harness is not really necessary with a manifold mounted sc??

any thoughts on that?

thx again

[doc350]

That would be because the MAF/Baro doesn't see boost in a twin screw setup. The problem is with a centrifugal supercharger that pressurizes the intake piping, causing a Baro reading that is inaccurate.

[schpenxel]

I'd have to see the two setups to say much more. I haven't dealt with gen 5's much. They for sure know more about them than I do

[rjw]

That would be because the MAF/Baro doesn't see boost in a twin screw setup. The problem is with a centrifugal supercharger that pressurizes the intake piping, causing a Baro reading that is inaccurate.

that`s what they told me...thx

[Higgs Boson]

That would be because the MAF/Baro doesn't see boost in a twin screw setup. The problem is with a centrifugal supercharger that pressurizes the intake piping, causing a Baro reading that is inaccurate.

derrr...my bad.

if you want a 3 bar map, the LS9 is a direct replacement, not the LT4. just update the map info in the tune copied from a ZR1.

[rjw]

derrr...my bad.

if you want a 3 bar map, the LS9 is a direct replacement, not the LT4. just update the map info in the tune copied from a ZR1.

I really only want/need what is necessary to properly/safely tune this lt1 at 8 or so psi

[5FDP]

Wideband needs to go before the cat converter if you are running one.

[rjw]

Wideband needs to go before the cat converter if you are running one.

got that, thx !!

[Higgs Boson]

I really only want/need what is necessary to properly/safely tune this lt1 at 8 or so psi

To properly tune the car you will need to tune the speed density tables, which is the VVE tables and to do that you need a MAP sensor that can read boost so you can calculate an accurate pressure ratio.

[rjw]

To properly tune the car you will need to tune the speed density tables, which is the VVE tables and to do that you need a MAP sensor that can read boost so you can calculate an accurate pressure ratio.

is the ls9 3 bar the only one available for this app? ( i only really need a 2 bar for this)

is there a difference between ve and vve tables?

thx

[Higgs Boson]

is the ls9 3 bar the only one available for this app? ( i only really need a 2 bar for this)

is there a difference between ve and vve tables?

thx

the LS9 is plug and play and has accurate available configuration information sitting in a ZR1 calibration just waiting for you to copy it. ;-)

VE and VVE are the same thing, the extra V stands for Virtual, which means you need a tool to convert a tradtional VE table into coefficients that are used today. There is a Wizard tool under Edit menu, you can read up on how to use it.

[rjw]

the LS9 is plug and play and has accurate available configuration information sitting in a ZR1 calibration just waiting for you to copy it. ;-)

VE and VVE are the same thing, the extra V stands for Virtual, which means you need a tool to convert a tradtional VE table into coefficients that are used today. There is a Wizard tool under Edit menu, you can read up on how to use it.

ok...gathering parts and will be starting on sc install, etc near end of month

thx to everyone so far....don`t go away, will need help later, I am sure !!

[GHuggins]

You just have to watch out on the baro still being in the MAF - this is just because the blower sucks a lot more than the NA setup did - SO your baro will drop under high airflow demands due to air filter restriction... Someone can correct me if I'm wrong on this... Other than that shouldn't cause any bad problems 3bar map is cheap from any gm dealer or online - install before installing sc on engine - typically goes in the very back of a whipple... Engine will not start until you input the new map settings, so remember that before you test fire

[rjw]

You just have to watch out on the baro still being in the MAF - this is just because the blower sucks a lot more than the NA setup did - SO your baro will drop under high airflow demands due to air filter restriction... Someone can correct me if I'm wrong on this... Other than that shouldn't cause any bad problems 3bar map is cheap from any gm dealer or online - install before installing sc on engine - typically goes in the very back of a whipple... Engine will not start until you input the new map settings, so remember that before you test fire

actually, I would really prefer a 2 bar map, in that this setup will never see more than 10 or 12 pounds.... and resolution would be finer. I like the idea of killing the maf baro, but would need the pinouts of the truck, etc to do this on my own...depending on how the budget looks around crunch time, I am seriously considering David`s harness

thanks for the input....!!