1968 GTO LS1/T56 Conversion
If you want a really clean fuse and relay panel check this out. I use them on the swaps we do.
http://order.waytekwire.com/productd...0RELAY%20RTMR/
They use the same size relay you have in your pic except it uses the 280 type connectors like GM uses.
Here is a pic of one in my 97 240SX.
http://order.waytekwire.com/productd...0RELAY%20RTMR/
They use the same size relay you have in your pic except it uses the 280 type connectors like GM uses.
Here is a pic of one in my 97 240SX.
Thread Starter
On The Tree
Joined: Jul 2009
Posts: 122
Likes: 1
From: Richmond, VA
the POS still won't idle...
I did some more data logging this morning. The commanded injection amount is better now, about 3 msec at idle, so that's good. The bad is that I do not have any IAC feedback, the car will not hold any kind of idle without throttle input, the PCM thinks it's in D4 while the transmission is in neutral (maybe this is normal for a MT), and there is no A/F feedback except for at start. Also, the manifold pressure is around 50kPa (ambient pressure is being measured at an impossible 103kPa). The manifold pressure might be reasonable because I am giving it 11-16% pedal. Can anyone make sense of all of this?
My thought is that there is something wrong with the wiring, but I am not sure where to start. Also, the only DTC's are for milcode lamp (I don't have one), and for cooling fan (not wired).
I did some more data logging this morning. The commanded injection amount is better now, about 3 msec at idle, so that's good. The bad is that I do not have any IAC feedback, the car will not hold any kind of idle without throttle input, the PCM thinks it's in D4 while the transmission is in neutral (maybe this is normal for a MT), and there is no A/F feedback except for at start. Also, the manifold pressure is around 50kPa (ambient pressure is being measured at an impossible 103kPa). The manifold pressure might be reasonable because I am giving it 11-16% pedal. Can anyone make sense of all of this?
My thought is that there is something wrong with the wiring, but I am not sure where to start. Also, the only DTC's are for milcode lamp (I don't have one), and for cooling fan (not wired).
Teching In
Joined: Nov 2010
Posts: 8
Likes: 0
From: at the Drag Strip
Hey Pushrod36, you sound like some Michigan tech boy. We here at MIT would have solved those problems right away...starting first with ditching the LS1 and using a Ford 4.6. For far less cubic inch, I can make just as much power and get better mileage. Besides it would be fun to see all the looks on the Gm gusy face when you open the hood at your first car show.
On The Tree
Joined: Apr 2010
Posts: 156
Likes: 0
From: LI, New York
Hey Pushrod36, you sound like some Michigan tech boy. We here at MIT would have solved those problems right away...starting first with ditching the LS1 and using a Ford 4.6. For far less cubic inch, I can make just as much power and get better mileage. Besides it would be fun to see all the looks on the Gm gusy face when you open the hood at your first car show.
For far less cubic inch, I can make just as much power and get better mileage.
pushrod, have you done some digging in the pcm/tuning section? i'm sure there's guys over there that would be able to help. that would save you a ton vs. scrapping your (how many hour?) home-built harness for the Speartech.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
is this guy serious? what is this, 1995? is 466 hp with a blower impressive where you come from? 
check back when you're making 500 streetable WHP, n/a. ****, toss a cam in an LQ4 and you're around that. Bolt on a set of untouched L92s, and you're close to 100 ponies more.
check back when you're making 500 streetable WHP, n/a. ****, toss a cam in an LQ4 and you're around that. Bolt on a set of untouched L92s, and you're close to 100 ponies more. Teching In
Joined: Nov 2010
Posts: 8
Likes: 0
From: at the Drag Strip
Impressive for 281 cu.inch. To bad you need over 60 more cubic inch to come close with your LS motor. Seriously have you seen the power the 5.4 makes....like 550 HP for the 2012 models and it is still with less cubic inch than your Obama company. I guess the Ford motor needs to be smaller displacement to keep the playing field level.
Teching In
Joined: Nov 2010
Posts: 8
Likes: 0
From: at the Drag Strip
Sorry but I am only stating the facts, I wish Barack could get his employees to build a better engine from the factory without having to redo the motor. I'm out drivng my factory horsepower while you guys are in the garage trying to play catch up. But you probably know this when you saw my tail lights after I drove around you.
playing catch up? First off this is the conversion section.
Second this car is a PONTIAC and hasnt been produced in decades Obama and General Motors no longer make them. so why you chose this thread is beyond me.
Third lets talk about ford the new 5.0 makes 1 pony less than the LS3. playing catch up lol.
fourth have you seen the spark plugs break off in the 3 valve 5.4? have you seen the 3 special tools to remove broken plugs. or that the body has to be removed from the chassis to pull the heads? its nice tho when they need their plugs changed it automatically spits them out.
fifth the exhaust manifold studs and nuts rust and brake off in the aluminum heads have you ever tried to drill and dremel and die grind those studs out?
sixth what about the cam phaser problems on the 5.4 even when using the only recommended oil that wont void the warrenty. the new 5.0 has 4 cam phasers instead of two.
i hope that doesnt' mean twice the problems.
Second this car is a PONTIAC and hasnt been produced in decades Obama and General Motors no longer make them. so why you chose this thread is beyond me.
Third lets talk about ford the new 5.0 makes 1 pony less than the LS3. playing catch up lol.
fourth have you seen the spark plugs break off in the 3 valve 5.4? have you seen the 3 special tools to remove broken plugs. or that the body has to be removed from the chassis to pull the heads? its nice tho when they need their plugs changed it automatically spits them out.
fifth the exhaust manifold studs and nuts rust and brake off in the aluminum heads have you ever tried to drill and dremel and die grind those studs out?
sixth what about the cam phaser problems on the 5.4 even when using the only recommended oil that wont void the warrenty. the new 5.0 has 4 cam phasers instead of two.
i hope that doesnt' mean twice the problems.
Thread Starter
On The Tree
Joined: Jul 2009
Posts: 122
Likes: 1
From: Richmond, VA
Haven't been around in a long time. Good to know that someone hijacked things to keep it interesting, though....but before I do that keep your Obama crap off of here. I worked for Honda R&D until two months ago. No bail-out, and I took a paycut longer than my friends to the north while maintaining profitability.
Allow me to set another misguided soul straight. The LS1 is not good because of fantastic specific output, and neither is the ford for that matter. If I wanted that I would be going with a ferrari 458, 355, or a honda engine. I like the LS1 because it is cheap (as far as modern stuff goes), and because it packages nicely. Also, the availability of 6-speed manual transmissions that bolt right up (read can be purchased with the engine fixed to it) is pretty great. Bottom line: both engines are far from engineering marvels.
Oh, and if you think I hate on fords check out my uncle's shop. I help him a lot, and the cars are great.
Finally, if just going as fast as possible is the goal I would argue that neither of these engines are a fantastic solution. Go buy a liter bike and be done with it.
Allow me to set another misguided soul straight. The LS1 is not good because of fantastic specific output, and neither is the ford for that matter. If I wanted that I would be going with a ferrari 458, 355, or a honda engine. I like the LS1 because it is cheap (as far as modern stuff goes), and because it packages nicely. Also, the availability of 6-speed manual transmissions that bolt right up (read can be purchased with the engine fixed to it) is pretty great. Bottom line: both engines are far from engineering marvels.
Oh, and if you think I hate on fords check out my uncle's shop. I help him a lot, and the cars are great.
Finally, if just going as fast as possible is the goal I would argue that neither of these engines are a fantastic solution. Go buy a liter bike and be done with it.
Teching In
Joined: Nov 2010
Posts: 8
Likes: 0
From: at the Drag Strip
Must be why I see so many Chevrolets running Ford engines.
Yo, Earl Flitter....would you like to see my photos of my 57 Chevy convertible with a Ford 351W engine. I love the reactions of people when they I open the hood at show them this combination.
