wouldnt you like to know

like i said if it works i will post details.. heck if it doesnt i will post details..

 

No... I really wouldn't...

I'll have mine running before you do.

 

good for you.. its winter up here i dont need it running untill spring..

anyways good luck with buying some parts. i perfer to experiment myself...

 

Thank you... its always summer the whole year here... Its what I like the most about here... I have experimented my fair share of things with this setup and its finally getting together. Then to my dyno and pumping some serious HP...

 

I think your missing the point... GM did it in PRODUCTION cause it's cheaper since wait.. they redesigned the whole motor..

I have $30 in mine, runs great. You have ?? in yours? You even said all this $$ and still dont have it running.

How will LS PCM improve idle on a bumpy cam? Also still cant use 02's with large cams.. GM doesnt use 02's on any of the large cammed show cars. I imagine they would if they could. PCM has nothing to do with it.

Better fuel fueling? What's better about 11.8AFR +/- 0.1 - 0.2afr?

Yes, you nailed it on the head.. trying to Justify all the extra time/money with the LSx PCM if you allready have a LTx PCM and just need some tuning knowledge.

Please post specifics not just "IN fact, before this system I was going to do away with the whole setup and put in an lsx engine just to have a decent fuel injection system" <--- this is basically saying nothing or I dont know what Im doing. Sorry, you added the [/sarcasm]

 

1. MUCH Better IAC/Idle Algorithm
2. Throttle Control Makes easier for LARGER Cams (capability in the future?)
3. 8 Coils
4. over 7krpm
5. More ignition power with control of dwell Time
6. Control of NOS and BOOST up 285KPa Natively
7. More resolution in VE Tables and Timing tables (specially when getting into boost)
8. TPS VE
9. PE vs IAT
10. Up to 12Hz MAF table
11. A/C Adjustments
12. IAC Compensation for various loads on the engine
13. Lean Cruise
14. Two Step/Valet Mode
15. RoadRunner / RealTime ECU
16. No more Opti, Failures and Drawbacks
17. EFILive (BEST SCANNER AND PROGRAMMER AVAILABLE)
18. Better Transient Fueling
19. 4L80E support
20. Engine Protection Mode (good to have when you have a EWP)
21. Less Likely to damage an ECU with programming sessions

The list is endless... AFR is just a part of the equation. Maintaining a good AFR can be done with the most simple computer like a haltech and such, but being able to have such a nasty setup for daily use, its really an accomplishment.

Essentially if you put in a 2bar map sensor (let alone a 3bar) on the stock LT1 you loose a lot of resolution on both timing and fuel tables. With the TPS VE table you can have a better fueling for super big cams. Open loop is SO much better with the LS1 PCM than the LT1 PCM it's not even funny.

I mean why can't people see the benefits. Sure for a cam only car or mild setups you do not need this, but when you are pushing boundaries on everything, you start to need quite a few things.

The most important thing here, power wise is the ignition system.

 

Suscribing..

This would be a great change, for the LTx crowd. Something like this takes a little time to iron out all the bugs..once that is done, it'll be golden.

Good luck guys.

 

I guess I still have to say I dont see big benefits here since none of the above would improve anything for me at this point.. resolution is proving not to be a problem for any of us, yes it would be nice to have more but it works fine, idle's fine, cruises fine, all that jaz. Over 2bar and 7K the problems come in.

If the LSx PCM could change settings in realtime now that's a huge plus, also if it had the capability to read a WB02 and adjust fuel that would also be enough for me to justify the move since that alone would make life easier.

Lean AFR on cruise creates more surging with a cam maybe not noticble with automatic.. cant see how most of th stuff is worth it, no problems with Transient fueling, or anything else for that matter on the LT1.

For me everything comes down to cost effectiveness, if I can do the same thing for free or cheap then I'm all for it vs spending mad cash and not having much to show for it.

Take a look at my dyno vid and tell me if you can really expect "better idle/transient fuel" out of it... it's as crisp/responsive as any motor can be... idling and throttle blipping in there, this was running on the lean side @ WOT I know but now it's at ~11.9.

 

The LS1 PCM swap is not for everyone. The LS1 PCM was attractive to me because of...
- 4L60E support
- Drive by Wire Throttle
- Integrated Cruise Control
- EFILive tuning and data logging
- Real Time tuning (with RoadRunner PCM)

Now my starting point was not an LT1 engine (for the S10 test vehicle with RamJet 350).

 

The last two in your list, is what is keeping my attention..

 

My main to go with this setup where

Efilive
No Damage to PCM when programming
8 Coils
Road Runner
Perfect 3bar boost.
TPS VE Table
And hopefully Low Z Inj mod in the future.

WIth my LT1 PCM I did 607rwhp. I had no issues whatsoever, I did have a 6btm and I had a superfueler with 3 96# injectors on the thorttle body to aid with boost... I achieved a flat AFR with it. I had no surging, no bucking. No nothing. It was all in pump gas. I know what the LT1 PCM is capable of. I have tuned many of them. Then again, with the LS1 PCM things are much more controllable NO risk whatsoever of damaging a PCM and RoadRunner, simply make it so much better for tuning.

I do get your point that if you can do it cheaper why spend the money, no one is arguing about it. But when you start pushing the limits, specially going over 15psi boost, then things start to get complicated. That aside, with the better ignition you can make more power with the same setup on the same car.

570rwhp with 7psi are very good. I did 555rwhp with 7psi.

 

With the stronger ignition you can make more power @ 7psi boost.

 

right on, I was just trying to get a feel for what the extra cost brings, I didnt realize with additional hardware/software you could make the LS1 PCM realitime "auto tuning" that is basically what you pay the big dollars for, so yup it's pretty sweet.

Next question (you knew this was coming), to get it all running with realtime logging, adjusting, fuel mapping, what do you think the cost comes to, just to compare to the $3500 aftermarket systems?

 

I can't answer specifically that question as I had most of my setup built. Eficonnection did the harness, cam sensor housing and reluctor ring... YMMV.

The only thing it doesn't do is the wideband, but iwth the LC1 cable you can actually program any output for the stock PCM to use as you desire...

Now with EFILIVE, RR and a wideband... it will autotune itself. I have done it many times with corvettes and its such a sweet setup, SPECIFICALLY when you change Intake manifolds which is what takes the most to tune. It should be cheaper than $3500.00 for everything including the $800 that the roadrunner costs, but I am not really sure.

 

We shipped the first prototype LT1 package today. This will be installed on a 94 Z28 with Vortech supercharger. Pictures will be made available at http://www.eficonnection.com when available.

This is the new LT1 engine harness:



This is a plug-and-play harness for the f-body. The estimated price for these harnesses will be about $800.00. Keep in mind this is not a generic, stand alone, type engine harness that you would have to splice or graft into your vehicle. Remove original LT1 engine harness and replace with new LT1 engine harness for LS1 PCM control. You can not get this type of harness for ANY aftermarket ECU.

Retained functionality:
- Fuel Enable (VATS)
- A/C System
- Canister Purge Solenoid
- AIR Pump Control
- Oxygen Sensors
- Fuel Pump Test/Prime
- Oil Level Sensor
- T56 (Skip Shift, Reverse Lockout, and Backup Switch)
- MAF (with adapter for LS1 5 wire MAF)
- All other obvious sensor and injector wiring

Removed functionality (not supported with LS1 PCM):
- EGR (LS1 PCM does not support vacuum actuated EGR valve)
- Traction Control

Added functionality:
- LS1 PCM
- Coil per Cylinder
- Second Knock Sensor (optional)
- LS2 Flat Response Knock Sensors (included for testing LS2 knock sensors)