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Search: Posts Made By: junkcltr
Showing results 1 to 50 of 492
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Forum: Power Adders
07-02-2018, 03:34 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

When I was messing with PWM and the walbro 410lb/hr, Walbro said they test down to 8 volts.
What is the lowest voltage you can PWM the Aeromotive at according to them? Or is a try it and see test?
Forum: Power Adders
10-27-2017, 08:23 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Or an early 2nd gen. Even in a WS6 would be nice.

ZZ, it is good you are finding all the errors causing it not to run right. It seems like you have the bad firmware resolved, the incorrect tune...
Forum: Power Adders
10-03-2017, 02:03 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

2.3 volts to a logic input is a no-no. Sounds like something went wrong with soldering/install.

1) Disconnect the hall effect sensor
2) Measure the voltage at the input (pin) of the MS where you...
Forum: Power Adders
09-26-2017, 12:51 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I never looked into running with 36-1 wheel. I have only run them with a good HEI module and coil. I am not saying this is the perfect PCM for him but it is an option.

I did make a converter box...
Forum: Power Adders
09-26-2017, 12:25 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Yes, pulley will have run out. Install ring, put pulley on lathe and true up the ring. Check run-out and make sure teeth are still "deep" enough.

The GM '427 PCM is pretty reliable. Has two...
Forum: Power Adders
09-25-2017, 07:04 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I recommend checking how "out-of-round" the pulley is and dial indicating the install of the ring. You may need to put the pulley on a lathe first. The teeth and hall effect pickup will miss teeth if...
Forum: Power Adders
09-24-2017, 07:14 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Good job guys. It looks like you are headed in the right direction. Get the code/wiring figured out, tune the MS parameters (edge, latency, etc) with the new crank trigger, and you should be in good...
Forum: Power Adders
09-21-2017, 11:59 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Misfire (unburned O2) will show up as leaner.
Setup/Verify the MS ignition wiring and parameters and then mess with timing. Just guessing right now will give random results.

EDIT: How old is the...
Forum: Power Adders
09-21-2017, 11:56 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

The better HEI will do it. Also helps to run a switched coil power wire from the back of the alternator to the coil for max voltage.
Forum: Power Adders
09-21-2017, 11:54 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

Start simple.

1) Verify you have the HEI output wired to the MS correctly
2) Verify you have the MS trigger edge set correctly
3) Set Hardware Spark latency correctly
Forum: Power Adders
09-21-2017, 10:43 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

A stock HEI can mean a lot of things. HEI Big coil in cap has a junk coil and junk module and has a hard time sparking no boost. HEI small cap and coil is decent and will spark low boost. HEI...
Forum: Power Adders
09-21-2017, 10:39 AM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I was curious how MS deals with the fixed time delay.
Yes, the hardware spark latency is intended to remove the 1/RPM timing change.

Here is how one user set the hardware spark latency ( I think...
Forum: Power Adders
09-20-2017, 10:12 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

All of the guys posting know the feel between the trans slipping and the engine just not feeling right. Each has plenty of experience.

The 4 coil wasted spark is an end all to the question of if...
Forum: Power Adders
09-20-2017, 04:00 PM
Replies: 349
Views: 107,357
Posted By junkcltr

Re: Installation of CXRacing's LS based third-gen turbo kit

It will interesting to see if that size turbine and compressor causes surge at slightly loaded cruise on a 4.8.
Forum: Power Adders
09-20-2017, 03:49 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I just found where it says the 6AL requires .9 amps input for every 1,000 rpm.

At 6k rpm, that is .9 * 6 = 5.4 Amps of input power. Suppose it chews up .25amps internally. That leaves 5.2 amps of...
Forum: Power Adders
09-20-2017, 03:42 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I agree with Joe and freeing up 3 more I/O and running 8 coils total. 2 coils wire to each of the 4 I/O to fire in wasted spark mode. That will give way more spark time than needed for an LSx coil...
Forum: Power Adders
09-19-2017, 10:31 PM
Replies: 4
Views: 722
Posted By junkcltr

Re: turbo recommendations 02 LQ9 6.0

The 78/75 sounds good. Anything close to a Garrett GT4202 spec.
Forum: Power Adders
09-19-2017, 10:18 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

I forget. What brand module and coil is in it?

The timing error is "exponential" because of a fixed timing latency and the time per degree is a 1/x function.

The GM latency table can be...
Forum: Power Adders
09-19-2017, 02:51 PM
Replies: 1,045
Views: 113,808
Posted By junkcltr

Re: Turbo Iroc - Round Four (Edit: Staying Gen1, new PT7675, heads, intake)

ZZ3Astro,
GM used a latency table in the GM ECMs which is for the HEI trigger and Module. Apply this table (advance) to your new ECM.

Stock and aftermarket HEI modules are not that impressive....
Forum: Power Adders
07-24-2017, 04:02 PM
Replies: 21
Views: 1,106
Posted By junkcltr

Re: Abnormal build, L69 T04E-57 trim.

I agree. I had two T04E-57 on a stock LB9 and the turbines were corking the output.
Forum: Power Adders
06-16-2017, 09:11 AM
Replies: 6
Views: 1,176
Posted By junkcltr

Re: twin T3 / T04E 57-trims on 305 driveable?

The 305 TPI I have with baby cam has an engine mount stock exh manifolds GT4296 T6-1.28 A/R and 3.5" out exhaust. Spools at 2300 when going WOT and good on the top end. Your LT1 head 305 would do...
Forum: Power Adders
06-15-2017, 12:43 PM
Replies: 6
Views: 1,176
Posted By junkcltr

Re: twin T3 / T04E 57-trims on 305 driveable?

The 50.5mm comp wheels would be better. The ebay "57 trim T4/T3" I had were 54mm comp wheel inducer.
Forum: Power Adders
06-15-2017, 07:00 AM
Replies: 6
Views: 1,176
Posted By junkcltr

Re: twin T3 / T04E 57-trims on 305 driveable?

I once ran a similiar combo. Stock 305 TPI and then put a small cam in it like the 260/260 and had the ebay T4/T3 57 trims on it. It spooled fine for the street. It would make boost around 2500-2800...
Forum: Power Adders
03-17-2017, 10:00 AM
Replies: 799
Views: 41,248
Posted By junkcltr

Re: Vortech T Trim build Winter 2015/2016

What does the thickness of the alum plate need to be to keep the same strength as the steel bracket?

What do you see for IAT temps with the air cleaner in that position?
Forum: Power Adders
10-27-2016, 10:55 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

What do you think is wrong with the injectors in it? If you are installing satured in place of P&H and you have marginal noise problem then the "reset" problem will go away. But this doesn't make the...
Forum: Power Adders
10-24-2016, 03:44 PM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

What you really want is a DPDT relay. It controls two things by one input. If you pull the relay everything stops working which is what you want. If a contact breaks internally you still have a fuel...
Forum: Power Adders
10-24-2016, 01:08 PM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

I looked at the MS PWB layout. They connect all processor and Analog grounds together. So, you can't apply good ground design practices.
All you can do is connect a good fat wire from the ECM to the...
Forum: Power Adders
10-24-2016, 10:55 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

The ECM resetting is likely to be due to ground wire location and connection.
With P&H there is more peak current through the injector ground wires.
High current through wires creates a voltage...
Forum: Power Adders
09-12-2016, 10:09 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

Since the ECM has two fuel drivers it is best to use them alternating with big injectors.
I am running 58 #/hr p&h in stock 305 TPI at 650 rpm at 45kpa at about 2.0 ms in alternating bank fire mode....
Forum: Power Adders
08-24-2016, 10:49 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

Could you post the wideband AFR reading at idle? I bet it wasn't higher than 9 AFR.

Even with a huge over lap cam and high cube sbc the math says it was a "bad configuration, but yeah it would run...
Forum: Power Adders
08-24-2016, 10:07 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

What confuses some of the GM thirdgen guys in terms of injector firing strategies is the ECM used. A GM 730 does single fire mode with the single injector driver it contains. It sprays all 8...
Forum: Power Adders
08-24-2016, 09:58 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

Since the staged is turned on at high HP/RPM. Whay not make a spacer plate with 4 or 8 injectors in it. Would only be 3/4" to 1" thick. It would give thermal cooling effect also. Turn on via ECM or...
Forum: Power Adders
08-10-2016, 01:41 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

Yes, the one ADC has a capacitor which is charged up with switched to an input. Much like charging a battery. If you put 6 volts on a battery and then disconnect (float the input), it will sit at 6...
Forum: Power Adders
08-10-2016, 01:35 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

Yes it is, but understand that there is only one ADC with a set of 8 switches in front of it. So, if the switch is set to MAP input then the ADC has the MAP voltage and SW reads this voltage. Then if...
Forum: Power Adders
08-10-2016, 12:54 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

I can tell you with 100% certainty that is not happening. That defies laws of physics. See my earlier post about sample and hold capacitor still charged from the MAP read.

Since MS can work with...
Forum: Power Adders
08-10-2016, 12:43 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

It is a run time problem too. If A/D inputs float then they will "track" the previous A/D read value because of the sample and hold capacitor. It all depends on the size of the sample capacitor and...
Forum: Power Adders
08-10-2016, 12:41 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

I will explain it another way.

1) SW sets the A/D mux to read spareADC that is connected to something sitting at 2.0 volts.
2) Next SW sets the mux to read spareADC2 this is floating (connected...
Forum: Power Adders
08-08-2016, 04:04 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

Supercharger, turbo, nitrous.......all good. I hope the supercharger works out.
Forum: Power Adders
08-08-2016, 04:02 PM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

Any floating input will read a random value within the input range. Normally a design will bias the input so that a floating input will read a deterministic value.

If you look at a GM schematic...
Forum: Power Adders
08-08-2016, 09:19 AM
Replies: 634
Views: 263,994
Posted By junkcltr

Re: Chronicles of a 9 Second Trans Am... Final Chapter

Street,
What is the trans build up in the car? It is pretty good to with stand wearing out 3 turbos with hard driving. How many miles on each of the turbos? I have a few turbos from trucks with...
Forum: Power Adders
07-21-2016, 09:56 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

The 3.0 can do things the microsquirt can't do. It can control P&H injectors, various ignition input triggers, stepper motor idle control. All these things require a lot more circuits/ICs.

The...
Forum: Power Adders
07-21-2016, 09:41 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

I think the hardware work arounds are what make the docs so difficult. For instance, the try do the resistor pack hack (bad turn on/off times) or PWM for peak and hold injectors. Confuses everyone.
...
Forum: Power Adders
07-20-2016, 08:36 AM
Replies: 799
Views: 41,248
Posted By junkcltr

Re: Vortech J Trim build Winter 2015/2016

Or take a break then and enjoy the summer. Horse Show season is upon us.
Forum: Power Adders
07-20-2016, 08:28 AM
Replies: 93
Views: 6,847
Posted By junkcltr

Re: What I have been up to -- teaser

I agree with your thoughts on the 411. I have gone back and forth with playing with the BDM interface to modify the code, and designing piggyback hardware that takes in the 411 injectors pulses and...
Forum: Power Adders
07-20-2016, 08:15 AM
Replies: 799
Views: 41,248
Posted By junkcltr

Re: Vortech J Trim build Winter 2015/2016

That is the best way to design that bracket.

Yeah, the MIGs are finally seeing inverter technology. Some people love it and some hate it. Pros and cons for the inverter HF (small transformer)...
Forum: Power Adders
07-19-2016, 05:06 PM
Replies: 93
Views: 6,847
Posted By junkcltr

Re: What I have been up to -- teaser

I have been messing with the 411. It looks decent to me.
What don't you like about it?
What kind of wheel options do you have for this engine? You could do a converter box that takes in the wheel...
Forum: Power Adders
07-19-2016, 04:16 PM
Replies: 799
Views: 41,248
Posted By junkcltr

Re: Vortech J Trim build Winter 2015/2016

Looks great so far. What MIG did you get? Fancy transformer has me curious.
If it warped from welding and you surface it then it might need to be shimmed again unless you made it too long so that it...
Forum: Power Adders
07-15-2016, 08:38 AM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

You mentioned in an earlier thread that one reason for wanting to sell was due to drivability and gas mileage. If you went with the 4l80E you would gain gas mileage. You can also do the ghetto trans...
Forum: Power Adders
07-13-2016, 11:43 PM
Replies: 1,679
Views: 86,623
Posted By junkcltr

Re: Single turbo 352 iroc 1000hp or bust the grand finale

I gave up on reading the debate, but I noticed resolution was an argument.

If you want more resolution then do what I have been doing for years. Read the 1bar in one 0 to 5v a2d input, and another...
Forum: DIY PROM
07-07-2016, 06:34 PM
Replies: 65
Views: 5,993
Posted By junkcltr

Re: $8D-T Test bin

Using wideband input for CL is straight forward. Make a new variable for WB2NB. When the WB value exceeds X then WB2NB reports lean, and vice versa for rich. Only one RAM and 2 ROM locations needed....
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