The LNF Tuning Guide

[mkriebs]

idk the trans code, I know its in this malibu rental I have lol, I prefer a stick but this auto has better gear ratios and autos are good for straight line. also it has the button shift on the shifter which I'm sure could be converted to paddle shift that I've seen on other chevy 4cyls(my hhr actually has the holes for the mount but idk bout cobalts)

I didn't realize that's how the trans worked, does the 92 4t65e handle 650nm? I didn't think it did... I thought it was 4(spd)t(transaxle)6(cyl)5(dunno)e(electronic)

Not sure how you are going to control it all, but I think I remember you saying a manual controller. Which, won't be very street friendly, but who cares (right?).

But yes, I think thats how all GM Autos work, the like the F35 should hold 350nm of tq. The first is the # of gears, the T for transverse and ## for NM.

You definitely won't be able to use the ECM, but, since you have an HHR maybe use the different body harness and ECM.

[omega_5]

The '65' is just a series number, it has no real meaning, and definitely does not reflect the torque rating.

For the record, a 4T65e is rated at 380Nm at the engine.

I should also point out that the correlation between torque rating and RPO on the manuals is purely coincidental as well.
The LSJ F35 might be rated at '350Nm', however note that said number is the gearbox rating. The engine rating is 271Nm.
Further more, the LNF F35 is rated by GM at 353Nm (ask GM wtf on that one). As well, the G6 F40 is rated at 333Nm.

[mkriebs]

The '65' is just a series number, it has no real meaning, and definitely does not reflect the torque rating.

For the record, a 4T65e is rated at 380Nm at the engine.

Yep, you're right. IDK why I was thinking that. The manuals are the ones rated by the NM that they can handle, like the F35.

My bad.

[omega_5]

Yep, you're right. IDK why I was thinking that. The manuals are the ones rated by the NM that they can handle, like the F35.

My bad.

Note that only some of the manuals follow that rating, and it's for gearbox torque, not engine torque.

[mkriebs]

Note that only some of the manuals follow that rating, and it's for gearbox torque, not engine torque.

Gotchas! I am not a trans guy, really.

[-MD- HHR]

The brothers LNF seems quite happy at .86, and has no knock at all.

[rian_human]

I have been fiddling with my tune and the car flies, but I am a little concerned about the amount of boost I am seeing.

I started with a GM Stage tune and 3 bar MAP sensors. I have my Max Airload Torque Table set to the numbers in the OP, and my DAL table peaks at 324.99, but I am seeing boost of up to 28PSI. The DIC readout stops at 25 and sits there until I get to 5800 or so rpm. I have timing set to 13 up top and occasionally I see little knock (if I forget to disable traction control) when TC intervenes..

Should I reduce the DAL table?

[BackyardTurbo_FTW]

Yea, with a GMS1 base file the WGDC% is higher if you watch the Boost Desired %. Try running 255 down the right 2 columns of your DAL chart and adjust from there to suit

[rian_human]

Comparing WGDC Boost Desired % to a stock non-GMS1 file, there is very little difference. No difference in the 100 column. I have a SKY Redline...

[Terminator2]

Comparing WGDC Boost Desired % to a stock non-GMS1 file, there is very little difference. No difference in the 100 column. I have a SKY Redline...

Yep you are right. I still think we are either missing a table or not adjusting something enough I still cannot get it to hold 100% DC or even more than 72% after 4K LOL.

[T-Man]

Yep you are right. I still think we are either missing a table or not adjusting something enough I still cannot get it to hold 100% DC or even more than 72% after 4K LOL.

Term,

Check what I posted in the "LNF Learning" thread. With what I posted, I was holding 80-85% WGDC until 5k rpm, when I let out. Give it a shot?

[BackyardTurbo_FTW]

I have no problem making and holding whatever wg% commanded.. I posted the table Im using.

[acesneights]

Honestly I think your table makes more sence BYT, thats how I set mine up give or take a few numbers.

[BackyardTurbo_FTW]

Thanks, the car does not need more then 70% WGDC below 3k, so limit it to that. Makes it drive better too IMO, no crazy part throttle spikes.

[acesneights]

Ya, I played with this table on saturday and ran faster in the 60-100 then I did with everything on the car lol. Im putting everything back on this weekend so Im hoping ill finally break under 4.8....My dreaded number

[Jar Jar]

I'm fairly new to the whole tuning this but as I'm data logging, I notice I'm getting KR when I let off the gas. I have the purge solenoid disconnected. Any thoughts? Is this real knock or is the car just spitting that out when the fuel cuts off?

[BackyardTurbo_FTW]

Prolly not real. I would check the BPV diaphram for tears.

[Jar Jar]

I finally got the chance to take it apart. Looks like new, didn't see any tears or cracks or anything of the sort. The mount of KR I'm seeing is <2.5 but it's in the mid range so I'm trying to pinpoint the problem and tune it back. Basically what I've done so far is changed the power enrich lambda to 0.87 at WOT like the guide has, changed the torque management values and slightly increased the airload tables but not to the extent of the guide. I haven't played with the timing yet but I would think advancing the timing would only make things worse?

[Iam Broke]

Getting the fuel trims spot on helps the midrange/midload KR the most. If it's that light, it's no big deal on the LNF.

[BackyardTurbo_FTW]

Get the fuel trims on point and then reduce the mid load timing slightly. Sounds like its not bad.