SBC TPI 0411 24X conversioin

[Mikey G]

I was actually going to go further and use the LS1 set-up with the Coil On Cyl. I have all the hardware. I have completed my harness as well. I was wondering if someone has had success with dialling in a cold start-up and idle with a "big" cam prior to purchasing all the software (?)

[fastacton]

You'd probably be better off getting your preferred tuning suite first (or getting someone else to flash a starter tune on it). You won't even be able to start a 0411 setup until you've went in and disabled VATS.

[1project2many]

Cold start is one of the toughest things to get right. You absolutely need to make sure the voltage corrections are correct for your injectors. During cranking the system voltage drops and after startup system voltage is higher while the battery recharges. If you have a WBO2 it may be possible to start it and warm it enough to get readings during cranking and startup. It's extremely helpful. It's important to separate cranking from cold running after startup. Fuel delivery during cranking can over-fuel the engine which can cause slightly rich operation after startup to seem overly rich. I like to find a rich and lean "stop" for cranking then work from the area in the middle letting the engine tell me what it likes. Remember to try and be roughly consistent with the starting temp. Without some way to monitor what's happening (I've used an ignition scope to watch firing voltage change, and I've tried a quartz filled spark plug to provide a "window" into the chamber ) it really takes something akin to Zen to devine where to start making changes. If it starts ok hot try starting at cooler and cooler temps to see how it goes. And be patient because you may only get one or two chances in a day to try again.

[Mikey G]

Cold start is one of the toughest things to get right. You absolutely need to make sure the voltage corrections are correct for your injectors. During cranking the system voltage drops and after startup system voltage is higher while the battery recharges. If you have a WBO2 it may be possible to start it and warm it enough to get readings during cranking and startup. It's extremely helpful. It's important to separate cranking from cold running after startup. Fuel delivery during cranking can over-fuel the engine which can cause slightly rich operation after startup to seem overly rich. I like to find a rich and lean "stop" for cranking then work from the area in the middle letting the engine tell me what it likes. Remember to try and be roughly consistent with the starting temp. Without some way to monitor what's happening (I've used an ignition scope to watch firing voltage change, and I've tried a quartz filled spark plug to provide a "window" into the chamber ) it really takes something akin to Zen to devine where to start making changes. If it starts ok hot try starting at cooler and cooler temps to see how it goes. And be patient because you may only get one or two chances in a day to try again.

I don't currently have a WB02, but is on my list of things to do during the swap over to the 0411. I will certainly keep an eye on the cranking voltage drop. I was considering getting a local tuner in olved with the tune after start up. He is very well know around here and his speciality is 0411 set-ups in many applications. Many LS conversions some around the 600 RWHP range. He said he will have no problems tuning my set-up. But he might be talking through his hat just to get the work. I was hoping to get some sort of confirmation the 0411 is capable - in the right hands.

[dave w]

My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.

For a starter flash, I modified a 2002 5.3 Liter flash.

dave w

[Mikey G]

My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.

For a starter flash, I modified a 2002 5.3 Liter flash.

dave w

Very nice install dave w. Looks factory installed. Being bone stock, I'm sure dialing in your tune was not so difficult. I don't think I will have it that easy.

[dave w]

Very nice install dave w. Looks factory installed.

Thanks

Being bone stock, I'm sure dialing in your tune was not so difficult.

I was on a steep learning curve. Tuning a stock engine was still a challenge.

I don't think I will have it that easy.

That kind of thinking is 100% correct!

See attached screen shot of 0411 injector parameters. I copied / pasted the L31 5.7 liter injector parameters from a stock tune. It will be very challenging to find aftermarket injector parameters that will copy / paste into the '0411 parameters.

Maybe the option of factory 8.1 Liter injectors (about 30 lb) are an option?

dave w

[Fast355]

My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.For a starter flash, I modified a 2002 5.3 Liter flash.dave w

I have a modified 8.1 flash in my Express van.It is DBW, 24x on a Marine intake on a L31 with worked 906 heads and a Marine '395 cam with 1.7 rockers.

[Mikey G]

Hi Fast355 Your Marine 395 cam has somewhat similar duration to my cam. I had to remove my intake manifold to swap out the HEI over to the L31 distributor to provide the CPS. the intake ports were heavily stained with fuel/carbon deposits al the way up to the TPI runners. I thought this to be excessive. This past summer, the engine had done a lot of idle tweaking with the OBDI set up. I understand big cammed engines have no business sitting at idle for extended periods of time. I do have a few questions regarding your set-up. - What vehicle is this engine in ? -or going in? - What RPM did you get the idle to settle at? - What have you done to the idle tables to compensate for the false lean condition the O2 sensors would read at idle ? - Are you running open or closed loop when idling? - Does the sequential injection and COP offer any help with a high overlapped cam at idle ? If there are any others who have comments to offer - please do. Thanks in advance. Cheers. Mikey G

[Mikey G]

You'd probably be better off getting your preferred tuning suite first (or getting someone else to flash a starter tune on it). You won't even be able to start a 0411 setup until you've went in and disabled VATS.

I had intensions on getting my 0411 re-flashed with the F body (cable drive), and also having the VATS disabled prior to a start-up