Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: DusterDave]
#1376586
01/28/13 12:17 AM
01/28/13 12:17 AM
|
Joined: May 2005
Posts: 180 merrill, wisconsin
voigtspeed
member
|
member
Joined: May 2005
Posts: 180
merrill, wisconsin
|
Interesting stuff keep it coming...........
Anyone can buy their parts a true hot rodder will make them!
ACCELERATION SPECIALIST
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: DusterDave]
#1376587
01/28/13 02:05 AM
01/28/13 02:05 AM
|
Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
|
Thats a good idea about balancing it..no big deal to pull it off and have it checked, I think I'll do that. As far as the cam signal that is required by the 411 LS computer, it is a 1X hall effect signal. All the computer needs to know from the cam sensor (at least combined with the 24X crank reluctor) is if the Engine is on the Compression Stroke or the Exhaust Stroke. The 24X crank reluctor shown on page one has a very unique pattern which lets the PCM know the crank position, just not if it's on the compression or exhaust stroke. The PCM doesn't even really need the Cam signal to run (you could just unhook it and turn off the codes in the computer), but the engine wouldn't start as easy. It would attempt to start by guessing what stroke the engine is on....and if it didn't start within so many seconds, it would try the opposite stroke. The later LS PCM's use a 58X reluctor and a 4X cam signal....this is not what I'm using and is not commonly used in these type of conversions. Here is the 24X reluctor pattern as seen by an oscilloscope:
Last edited by Quicksilver440; 01/28/13 02:09 AM.
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376588
01/28/13 03:24 AM
01/28/13 03:24 AM
|
Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
|
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
|
smells like a thread that makes the archives to me awesome work
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376594
01/28/13 05:35 PM
01/28/13 05:35 PM
|
Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
|
Again...I didn't come up with this, this was done by "EFI connection" in order to convert the LT1 Chevy cars to use the LS PCM. Here's the sensor they used. It may be too deep though...so we will see.
Last edited by Quicksilver440; 01/28/13 05:36 PM.
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376595
01/28/13 05:45 PM
01/28/13 05:45 PM
|
Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
|
Here is my attempt at a hidden reluctor, it is a 24X reluctor off a BB Chevy that fits on the crank snout. The problem is that the BB Chevy crank snouts are a larger diameter than the BB mopar so there is more play than I am comfortable with. If that reluctor is not centered on the crank snout, then the clearance between the reluctor teeth and the Crank Sensor would vary during rotation. Anybody know a easy way to make the hole smaller and maintain a key way? It is made of powdered metal, if that makes a difference.... Then the problem would be how to add a crank sensor to the bottom of the timing cover, it doesn't really land in a good location on the cover during my mockups....also, I would want some level of adjustment with the sensor and the keyway on a BB chevy and a BB mopar is not the same if I remember correctly. So the reluctor would need another keyway cut (but that's no big deal). Also, the balancer snout would have to be cut to keep pulley alignment, but again, thats no big deal.
Last edited by Quicksilver440; 01/28/13 05:47 PM.
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: SLOW67]
#1376596
01/28/13 05:49 PM
01/28/13 05:49 PM
|
Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
|
Quote:
BTW I'm going to be trying this with a drive by wire harness
Are you planning on using Drive-by-wire itself? Or are you just using a drive-by-wire harness? No big deal to just use the harness with a Drive-by-Cable throttle body, as you just have to add a few wires and reposition some pins in the connectors, etc. Drive-by-wire it's self would present a new bunch of issues (but it could be done).
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376599
01/29/13 01:19 AM
01/29/13 01:19 AM
|
Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
OP
I Live Here
|
OP
I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
|
Ok...I still havn't got to the Wiring harness and the PCM tuning stuff. But for now, Let's talk economics..... what if I told you that you could do this EFI setup for as little as $700? (not counting fuel pump...add $113 for a Walbro 255 which is the most common performance LS1 upgrade pump)
Obviously, higher HP setups will cost more than a solid 450-500 HP system due to the cost of injectors, aftermarket throttle bodies, etc. Forced induction could get away with stock throttle bodies in a pinch too.
Attached is a spreadsheet showing my costs other than the fuel system for my motor. I make about 450 hp at the wheels.....I have also included the costs using all stock parts and doing things yourself which is around $700. These prices are very realistic as they are what I actually paid, but I'm quite the bargain hunter and I spent weeks looking for good deals, etc.
Also, remember that this replaces your carb, intake and ignition system. I paid about $150 for my used Holley 850 DP, $125 for my Holley SD intake used, and $275 for my MSD digital 6+. Thats $575 using a used intake and carb.
Here you go (click the attachment link above and it gets big enough to read):
Last edited by Quicksilver440; 01/29/13 01:28 AM.
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376601
01/29/13 11:27 AM
01/29/13 11:27 AM
|
Joined: Mar 2007
Posts: 9,336 South-Central (Sebring), FL
Commando1
master
|
master
Joined: Mar 2007
Posts: 9,336
South-Central (Sebring), FL
|
Quote:
...what if I told you that you could do this EFI setup for as little as $700?
What if I told you that your thread is arguably hands down the best Moparts technical how-to ever. TWhen finished this should be pinned at the top of the Tech Archives section.
|
|
|
Re: My 440 EFI- Coil on Plug & LS PCM ignition project
[Re: Quicksilver440]
#1376602
01/29/13 12:07 PM
01/29/13 12:07 PM
|
Joined: Jan 2003
Posts: 75,274 A gulag near you.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 75,274
A gulag near you.
|
Quote:
Here is my attempt at a hidden reluctor, it is a 24X reluctor off a BB Chevy that fits on the crank snout. The problem is that the BB Chevy crank snouts are a larger diameter than the BB mopar so there is more play than I am comfortable with. If that reluctor is not centered on the crank snout, then the clearance between the reluctor teeth and the Crank Sensor would vary during rotation. Anybody know a easy way to make the hole smaller and maintain a key way? It is made of powdered metal, if that makes a difference....
Then the problem would be how to add a crank sensor to the bottom of the timing cover, it doesn't really land in a good location on the cover during my mockups....also, I would want some level of adjustment with the sensor and the keyway on a BB chevy and a BB mopar is not the same if I remember correctly. So the reluctor would need another keyway cut (but that's no big deal). Also, the balancer snout would have to be cut to keep pulley alignment, but again, thats no big deal.
How about removing the part that connects to the crank snout and attaching the reluctor to an oil slinger ?
Great write up , I'd definitely want to do something like this considering the cost.
I don't see oxy sensors listed on the 700 budget side ?
Last edited by JohnRR; 01/29/13 12:12 PM.
|
|
|
|
|