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Search: Posts Made By: 89C2500
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Forum: DIY PROM
03-20-2007, 01:24 PM
Replies: 5
Views: 1,354
Posted By 89C2500

Re: EBL and Multiport conversion

Personally, I've been running one of the Edelbrock MPFI manifolds with 35# Magneti Marelli pico injectors for about two years with no problems. However, I don't use the 7747, but use true batch fire...
Forum: DIY PROM
01-30-2007, 11:05 PM
Replies: 559
Views: 52,223
Posted By 89C2500

...or batch fire '7747? :D

...or batch fire '7747? :D
Forum: DIY PROM
03-13-2006, 09:34 AM
Replies: 43
Views: 6,603
Posted By 89C2500

According to the AC Delco database, the 96 LT4...

According to the AC Delco database, the 96 LT4 Vette used one knock sensor. The LT1 Caprice & Vette used two, but the LT1 Camaro used one sensor.

I tested it out on my ECM bench before putting in...
Forum: DIY PROM
03-12-2006, 11:33 AM
Replies: 43
Views: 6,603
Posted By 89C2500

The knock filter is almost identical to the one...

The knock filter is almost identical to the one on AUJP. I'd guess the 4.3 V6 and 5.7V8 having the same bore & stroke might be the reason. I had previously removed the coating on the AUJP filter to...
Forum: DIY PROM
03-11-2006, 09:37 PM
Replies: 43
Views: 6,603
Posted By 89C2500

Oh...limp home mode works much better now than...

Oh...limp home mode works much better now than when using an AUJP memcal.
Forum: DIY PROM
03-11-2006, 09:28 PM
Replies: 43
Views: 6,603
Posted By 89C2500

I did this modification today to a '749 BBZB...

I did this modification today to a '749 BBZB memcal. Instead of using ground at CAL53, I used CAL62 which is also a ground. Works out great!
Forum: DFI and ECM
02-28-2006, 06:30 PM
Replies: 1
Views: 631
Posted By 89C2500

749 is not SEFI so I don't think it matters. I'm...

749 is not SEFI so I don't think it matters. I'm running it on a V8 with saturated injectors (high impedance) so it's wired like a Syclone/Typhoon and fires in batch mode. I believe the Turbo...
Forum: DIY PROM
02-27-2006, 11:31 PM
Replies: 11
Views: 762
Posted By 89C2500

At this point, if I were you I'd try as...

At this point, if I were you I'd try as 3.8TransAM suggested.....start over with a fresh stock $58 BIN. All I'd do is set it up for 8 cyl and your base timing. Re: timing...I'm surprise you can run...
Forum: DIY PROM
02-27-2006, 02:06 PM
Replies: 11
Views: 762
Posted By 89C2500

I'm running a 355, iron Vortec heads, slightly...

I'm running a 355, iron Vortec heads, slightly smaller cam than yours w/114lsa, Edelbrock MPFI intake, 33lb injectors @ 45psi and a Whipple 2300AX blower. I was running 11psi boost but have...
Forum: DIY PROM
02-26-2006, 08:41 PM
Replies: 11
Views: 762
Posted By 89C2500

You might try setting bpc back to 128 and use F77...

You might try setting bpc back to 128 and use F77 to add more fuel up top.

Also, the 90kPa cell of F77 affects ALL lower VE cells as well. If you increase the 90kPa cell above 1.0, it will add...
Forum: DIY PROM
02-26-2006, 01:18 PM
Replies: 11
Views: 762
Posted By 89C2500

Yep...F30 is an adder to both F29 & F29E. ...

Yep...F30 is an adder to both F29 & F29E. However, before you start there, I'd suggest lowering you BPC in F28. 150 seem a little high to me. Also, verify your IAC minimum air adjustment and check...
Forum: DIY PROM
02-09-2006, 10:10 PM
Replies: 43
Views: 6,603
Posted By 89C2500

You need to look closer....it's not "all" on one...

You need to look closer....it's not "all" on one page of the schematics. Look at sheet 6, U13 at the top of the page shows pin 11 labeled as "CYL". It's connected to CAL56(8), the "(8)" means you...
Forum: DIY PROM
02-09-2006, 09:54 PM
Replies: 43
Views: 6,603
Posted By 89C2500

CAL56 would be on the 16 pin chip. Check out the...

CAL56 would be on the 16 pin chip. Check out the memcal doc found here ftp.diy-efi.org/uploads/memcal.pdf

The netres in that document is from a twin turbo 3.6 liter V6.
Forum: DIY PROM
02-09-2006, 09:33 PM
Replies: 43
Views: 6,603
Posted By 89C2500

When I was working with the 1227749 and TBI a...

When I was working with the 1227749 and TBI a while back, I found CAL56 (memcal pin 56) was used for cylinder select. I believe I determined this by looking at the ECM schematics on Ludis' site...
Forum: DIY PROM
09-07-2005, 06:15 PM
Replies: 16
Views: 766
Posted By 89C2500

Yep, that's what I was experiencing....it didn't...

Yep, that's what I was experiencing....it didn't need as much fuel because of the retarded timing. I pulled fuel, changed plugs, wires, etc. Adding timing is what the engine wanted. I was even...
Forum: DIY PROM
09-07-2005, 05:11 PM
Replies: 16
Views: 766
Posted By 89C2500

Re: Hmm... problem... ideas?

Are you sure you're flooding out? I thought I was early on, but it turned out that the stock NA spark table had too little timing at lower RPM / higher MAP cells. When launching in first gear, by...
Forum: DIY PROM
08-26-2005, 12:54 PM
Replies: 12
Views: 798
Posted By 89C2500

I like to use the 2 transistor design. See...

I like to use the 2 transistor design. See Rbob's responses in this (https://www.thirdgen.org/techbb2/showthread.php?s=&threadid=216309) post for schematics and build pictures. It works with 160...
Forum: DIY PROM
06-16-2005, 01:19 PM
Replies: 16
Views: 1,427
Posted By 89C2500

I think your BPC setting is too low assuming your...

I think your BPC setting is too low assuming your fuel pressure is correct. You said you had it at .058 in Promgrammer. I calculate it should be .068 based on your specs. This might be why it...
Forum: DIY PROM
05-21-2005, 11:06 AM
Replies: 25
Views: 6,000
Posted By 89C2500

Re: Re: Re: intermittent lean at very light throttle

I think running $6E its equivalent is single fire(quasi-async) versus double fire(sync).

What I've experienced with big TBI injectors at low loads, is that the pulse widths get so small in sync...
Forum: DIY PROM
05-19-2005, 08:46 PM
Replies: 47
Views: 14,952
Posted By 89C2500

That would be the 25312179. Use AC Delco's...

That would be the 25312179.

Use AC Delco's Competitive Cross Reference (http://www.acdelco.com/html/catalog/index_cross.htm) to find ACD part numbers for many/most GM parts.
Forum: DIY PROM
05-19-2005, 02:41 PM
Replies: 25
Views: 6,000
Posted By 89C2500

Re: intermittent lean at very light throttle

Not sure sure if this is relevant with $6E, but I've experienced a similar problem running $58 when fueling was switching between sync and async modes under very light loads.
Forum: TBI
05-09-2005, 08:23 PM
Replies: 33
Views: 3,759
Posted By 89C2500

67ss, I notice you're running an Edelbrock...

67ss,

I notice you're running an Edelbrock MPFI TBI conversion manifold. That looks like a good combo! Did you need to make any modifications to the Whipple mounting mounting brackets or the...
Forum: DIY PROM
05-09-2005, 08:11 PM
Replies: 4
Views: 2,166
Posted By 89C2500

Re: 2 bar MAP sensor?

I used GM#12569241 which cross-references to the ACDelco number.
Forum: DIY PROM
04-07-2005, 12:50 PM
Replies: 16
Views: 1,340
Posted By 89C2500

YMMV.....it depends on the laptop and if it can...

YMMV.....it depends on the laptop and if it can drive enough current from its RS232 port. Mine could not....I tried. I first built the 2-trans internally powered cable and tried many hours to get...
Forum: DIY PROM
04-06-2005, 05:36 PM
Replies: 16
Views: 1,340
Posted By 89C2500

I've used both, but mostly TunerPro RT. I just...

I've used both, but mostly TunerPro RT. I just use the 2-transistor design cable (with external +12v connnection).
Forum: TBI
04-06-2005, 01:36 PM
Replies: 4
Views: 860
Posted By 89C2500

Thanks...I figured I had the ext. reg. installed...

Thanks...I figured I had the ext. reg. installed properly, but when you mentioned "3-way" I thought I might be missing something!

The gauge is on the supply side so I guess the injectors should...
Forum: TBI
04-06-2005, 01:20 PM
Replies: 2
Views: 748
Posted By 89C2500

There should be a 3/8" NPT port on the #8 runner....

There should be a 3/8" NPT port on the #8 runner. That's where I tied in brake booster line.
Forum: TBI
04-05-2005, 09:58 AM
Replies: 4
Views: 860
Posted By 89C2500

I removed the internal tbi regulator diaphram and...

I removed the internal tbi regulator diaphram and routed the tbi return to the external regulator. So the Aeromotive regulator is between the tbi return outlet and the return line to the fuel...
Forum: TBI
04-04-2005, 03:09 PM
Replies: 4
Views: 860
Posted By 89C2500

Ext. FPR & "internal' TBI FPR removed ?

I've been using an external Aeromotive FPR with a Holley 670 TBI and Walbro 255HP fuel pump running 53psi. I left the TBI regulator in place, but with the adjustment screw backed way off. With this...
Forum: DIY PROM
03-29-2005, 09:49 PM
Replies: 12
Views: 1,431
Posted By 89C2500

How did you get .071 for bpc vs. egr? That seems...

How did you get .071 for bpc vs. egr? That seems too high for your combo. I calculate more like .058/.059.

From the "$58 Frequently Asked Questions" thread:
The correct formula is: BPC =...
Forum: DIY PROM
03-10-2005, 09:36 AM
Replies: 9
Views: 1,302
Posted By 89C2500

Re: idle kpa at altitude

I live at 7000 feet any my idle kPa's are in the 30-35kPa range. It's on the high end of that range when cold, but I've never encountered a 15kPa difference.

FWIW, I did need to adjust the MAP...
Forum: TBI
02-16-2005, 06:45 PM
Replies: 40
Views: 9,362
Posted By 89C2500

Using a MSD BTM and the SDEFI EIC would provide a...

Using a MSD BTM and the SDEFI EIC would provide a rough equivalent to using the 749 ecu....control of timing & fueling under boost. It seems to be a good combo if not going DFI or oem 749.
Forum: TBI
02-16-2005, 06:32 PM
Replies: 40
Views: 9,362
Posted By 89C2500

Yep....well, I'm not running the "factory"...

Yep....well, I'm not running the "factory" injectors but the Holley Delphi TBI injectors. No reason BB stock TBI injectors wouldn't work. I swapped to the Holley 670 tbi unit before using the 749...
Forum: TBI
02-14-2005, 02:29 PM
Replies: 40
Views: 9,362
Posted By 89C2500

JB, Regarding FMUs.....the Vortech...

JB,

Regarding FMUs.....the Vortech supplementary injection system is a type of FMU. Think of an FMU as any device that adds fuel under boost, whether additional injector(s) or a fuel pressure...
Forum: DIY PROM
01-22-2005, 10:23 PM
Replies: 18
Views: 21,195
Posted By 89C2500

Congrats! :thumbsup: This diy stuff is fun, eh?...

Congrats! :thumbsup: This diy stuff is fun, eh? :)

I guess you got the grounds figured out. Now all the real fun begins! :D

Brent
Forum: DIY PROM
01-22-2005, 03:03 PM
Replies: 18
Views: 21,195
Posted By 89C2500

It's not needed on either the 747 or 749. Not...

It's not needed on either the 747 or 749. Not too sure about the 165 but it might need a 10k across A&B, maybe just to connect. There's a discussion about it here...
Forum: DIY PROM
01-22-2005, 02:35 PM
Replies: 18
Views: 21,195
Posted By 89C2500

AFAIK, it should work just fine. Brent

AFAIK, it should work just fine.

Brent
Forum: DIY PROM
01-22-2005, 01:58 PM
Replies: 18
Views: 21,195
Posted By 89C2500

I used the "Simple ALDL-lotus esprit" as it is...

I used the "Simple ALDL-lotus esprit" as it is powered from a separate +12vdc source. The other 2-transistor circuit pulls its +12vdc from the RS232 port and some laptops can't drive this circuit...
Forum: DIY PROM
01-22-2005, 01:14 PM
Replies: 18
Views: 21,195
Posted By 89C2500

I used the single transistor circuit with a '747...

I used the single transistor circuit with a '747 ecu (C3 type, 160 baud ALDL) but it did not work on a '749 (P4 type, 8192 baud ALDL). I'm using the 2-transistor version now with a 749 ECU. I've...
Forum: DIY PROM
01-20-2005, 12:36 PM
Replies: 5
Views: 551
Posted By 89C2500

ummm....wouldn't the info be found here...

ummm....wouldn't the info be found here https://www.thirdgen.org/newdesign/tech/promintro.shtml under the Scan Tools and Wide Band Oxygen Sensors section?
Forum: Tech / General Engine
01-20-2005, 12:16 PM
Replies: 28
Views: 1,660
Posted By 89C2500

Yep, as Damon stated, looks like you're pulling...

Yep, as Damon stated, looks like you're pulling in oil through the intake valves. Look at the picture of one of my plugs in this post...
Forum: DIY PROM
01-20-2005, 11:00 AM
Replies: 41
Views: 2,948
Posted By 89C2500

Bob, Board arrived Tuesday. Thanks for...

Bob,

Board arrived Tuesday. Thanks for making this available! I ordered the parts yesterday so hopefully I'll have the bench up and running in a couple of weeks. :)

Brent
Forum: Tech / General Engine
01-20-2005, 12:33 AM
Replies: 8
Views: 3,077
Posted By 89C2500

IHI, thanks for the suggestions. I put in a set...

IHI, thanks for the suggestions. I put in a set of new plugs this weekend and cut back the ground straps as you indicated. I'll run them for a bit and then do a good WOT run and check for the mark...
Forum: DIY PROM
01-16-2005, 07:40 PM
Replies: 100
Views: 15,678
Posted By 89C2500

Works in sub-zero temps too!

I've been using my OSTRICH since mid-December and I love it! Absolutely NO issues, or glitches....not one! I've upload a new .bin at -10F...no problems. It has been a tremendous time-saver for me....
Forum: Tech / General Engine
01-16-2005, 07:23 PM
Replies: 8
Views: 3,077
Posted By 89C2500

Solved!

Just in case anyone else runs into the same problem....I found the solution.

I read some advice in another thread about checking to see if the deposits on the porcelain (what I thought were burned...
Forum: Tech / General Engine
12-28-2004, 02:12 PM
Replies: 8
Views: 3,077
Posted By 89C2500

Yep...you're right. Don't know what I was...

Yep...you're right. Don't know what I was thinking trying .050 gap. Must be fond memories of my previous 4th gen LS1! :rolleyes:

I replaced the plugs with one range cooler and gapped to .034. ...
Forum: Tech / General Engine
12-20-2004, 10:50 PM
Replies: 8
Views: 3,077
Posted By 89C2500

Well...only 50 highway miles and the WBO2 doesn't...

Well...only 50 highway miles and the WBO2 doesn't show a lean condition. Also the BLMs reported by the NBO2 don't indicate lean. The burnt area on the porcelain that concerns me. I'm running ...
Forum: Tech / General Engine
12-20-2004, 12:29 PM
Replies: 8
Views: 3,077
Posted By 89C2500

Burnt spark plugs - timing??

I'm running a 749 ecu on a supercharged TBI v8 and have been struggling with the tune. A recent compression test revealed a broken valve spring so I figured that was my problem all along. Well,...
Forum: DIY PROM
11-16-2004, 12:37 PM
Replies: 35
Views: 1,254
Posted By 89C2500

hmmm.....I was going to suggest the opposite. ...

hmmm.....I was going to suggest the opposite. I.E. expanding BLM cells from just two to a BLM cell table like in $8D.
Forum: DIY PROM
11-15-2004, 01:09 PM
Replies: 8
Views: 722
Posted By 89C2500

Thanks! That was it...I was looking at ALDL byte...

Thanks! That was it...I was looking at ALDL byte 19. Mode word 2 bit 7 shows the cell changing properly.

When MW2-7 is set (idle cell) does this also mean the VE term lookup is from F29E, the...
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