Engine Harness & Controller question
Thread Starter
Staging Lane
Joined: Oct 2009
Posts: 98
Likes: 1
From: Arizona
Engine Harness & Controller question Here's my question; Installing an LSX into a 67 camaro never used the LS technology so i'm a newbie regarding using the computer regardless:
I'm not sure what questions i need to ask regarding versatility....Tune options, i'm shooting for 700 FWHP.
Should i go to a junk yard and pick up an LS3 or newer harness and computer (if i can find one)
Or should i go aftermarket (Cha ching$$$)
is there someone out there i can call get more info?
also i plan on using the ISIS system for the car itself....if that matters...
Tony
I'm not sure what questions i need to ask regarding versatility....Tune options, i'm shooting for 700 FWHP.
Should i go to a junk yard and pick up an LS3 or newer harness and computer (if i can find one)
Or should i go aftermarket (Cha ching$$$)
is there someone out there i can call get more info?
also i plan on using the ISIS system for the car itself....if that matters...
Tony
It all depends on what motor you put into the car, as to what controller and harness you need. I wouldn't go after market at the power levels you're looking at. Do you have the motor already? If so, what year is the motor?
Staging Lane
Joined: Apr 2012
Posts: 94
Likes: 0
From: Pacific NW
Here's my question; Installing an LSX into a 67 camaro never used the LS technology so i'm a newbie regarding using the computer regardless:
I'm not sure what questions i need to ask regarding versatility....Tune options, i'm shooting for 700 FWHP.
Should i go to a junk yard and pick up an LS3 or newer harness and computer (if i can find one)
Or should i go aftermarket (Cha ching$$$)
is there someone out there i can call get more info?
also i plan on using the ISIS system for the car itself....if that matters...
Tony
I'm not sure what questions i need to ask regarding versatility....Tune options, i'm shooting for 700 FWHP.
Should i go to a junk yard and pick up an LS3 or newer harness and computer (if i can find one)
Or should i go aftermarket (Cha ching$$$)
is there someone out there i can call get more info?
also i plan on using the ISIS system for the car itself....if that matters...
Tony
The older LS engines used a 24 tooth reluctor wheel on the crank and the newer ones use a 58 tooth. You will need to pick one for your build and then match up the correct ECU, sensors, and wiring harness. I had a custom wiring harness made for my project. This simplified things. I just specified the ECU type, alternator type, sensors, and computer mounting location. When the harness showed up I just plugged it in and everything fit and worked perfectly.
Also... be sure to size the fuel pump correctly for the 700 HP build. Get a fuel pump that will maintain correct pressure at peak HP. My engine put out 670 HP on the engine dyno and I use a 380 lph pump.
Pay close attention to sizing the alternator. Be sure to have enough output to power the coils, cooling fans, fuel pump, etc. I used a 150 amp alternator on my LS engine (my small block had an 85 amp alternator).
I might seem like a lot of work to make the switch but it's well worth it, you'll see.
Good luck with your build!
Thread Starter
Staging Lane
Joined: Oct 2009
Posts: 98
Likes: 1
From: Arizona
Thanks Dale,
Great Info; plan on going with the 58 tooth wheel. Fuel tank with pump is already spec'd just trying to decide who i buy it from...
Where did you get you harness, sounds like a great option.....
Great Info; plan on going with the 58 tooth wheel. Fuel tank with pump is already spec'd just trying to decide who i buy it from...
Where did you get you harness, sounds like a great option.....
Teching In
Joined: Dec 2006
Posts: 2
Likes: 0
Got my custom harness and ECM (GM out of a 2008 Vette) from PSI. Great guys with excellent quality product. Programed for per my motor specs. So basically plug and play. Approx $1000 for everything.
Staging Lane
Joined: Apr 2012
Posts: 94
Likes: 0
From: Pacific NW
The wiring harness I used was purchased through my engine builder (Nutter Racing Engines) and I don't know the vendor name that he used. When you buy the harness If you have a choice get the show covering... it's a black mesh material that covers the wires and it makes for a nice clean look.
Wire harness with show cover
Home made ECU mounting bracket
Here is a picture of the GM ECU and fuel pump controller mounted in the car at the right front corner behind the battery. This worked good. I ran the main line inside the fender up to the firewall.
Ricks Tank with fuel pump installed
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Verdad Gallardo Staging Lane
Joined: Apr 2012
Posts: 94
Likes: 0
From: Pacific NW
Thread Starter
Staging Lane
Joined: Oct 2009
Posts: 98
Likes: 1
From: Arizona
Dale great info... i love this site...great people with the same addiction....
I was trying to decide between the Vaporworx or the tank DSE offers (maybe its a vaporworx also??) I think DSE has direct "withdrawl" on my bank account
I really like the "show" version...you really got a nice install....what intake are you running?
Question about the ECM...can it be tuned at a later date, i just don't want to get an ECM thats "locked"..
I was trying to decide between the Vaporworx or the tank DSE offers (maybe its a vaporworx also??) I think DSE has direct "withdrawl" on my bank account
I really like the "show" version...you really got a nice install....what intake are you running?
Question about the ECM...can it be tuned at a later date, i just don't want to get an ECM thats "locked"..
Staging Lane
Joined: Apr 2012
Posts: 94
Likes: 0
From: Pacific NW
Dale great info... i love this site...great people with the same addiction....
I was trying to decide between the Vaporworx or the tank DSE offers (maybe its a vaporworx also??) I think DSE has direct "withdrawl" on my bank account
I really like the "show" version...you really got a nice install....what intake are you running?
Question about the ECM...can it be tuned at a later date, i just don't want to get an ECM thats "locked"..
I was trying to decide between the Vaporworx or the tank DSE offers (maybe its a vaporworx also??) I think DSE has direct "withdrawl" on my bank account
I really like the "show" version...you really got a nice install....what intake are you running?
Question about the ECM...can it be tuned at a later date, i just don't want to get an ECM thats "locked"..
I am not familiar with the DSE tank although every part I have bought from DSE has always been top notch. Just make sure the tank has the correct mount for whatever fuel pump you choose to use. The one I bought had the correct flange mount for the submerged GM fuel pump. The Ricks Tanks had lot's of options for different pump mounts.
I am using CNC ported GM LS7 heads, and a GM LS7 single plane intake manifold set up for port fuel injection. I wanted to retain a bit of the old school look under the hood and I wanted strong mid range and top end power. I had plenty of room for the single plane intake since my car has a cowel induction hood.
The beauty of using the GM ECU is that they can be easily tuned at any time. Once you determine your basic engine specs; CI, heads, intake, tb, induction, cam, etc. you can purchase the ECU and wiring harness pre-programmed with a tune by providing the vendor with the build info (I know Speartech offers this service). Once you finish your build you can modify the tune any time using purchased software by yourself, or pay someone local to tune it. My engine builder buys GM ECU's from wrecked cars and then loads a custom tune using HP Tuner software. This is what we used on my engine. The GM ECU's are very versatile. You can also log engine data on the fly and review later (with the right software package). This can be handy if you do track days or drag racing. I am now in the process of learning the software.
Staging Lane
Joined: Apr 2012
Posts: 94
Likes: 0
From: Pacific NW
