87tpi7749

This is not going in a F-body right now, its going in my pick-up but I figure maybe I could give someone a hands on opinion. Motor is going together right now. Mostly stock, 0.030 over coated Hypers, PM rods, stock stroke, Vortec heads, ram jet roller cam 196/206 431/451. I have the $0d program to treak the chip Edelbrock sends. I'll post again after the install & break-in.

87tpi7749

Install complete, motor broken-in. I am pleased with everything. The hardware fit really good. There was not any fabrication required. All brackets, hoses, fittings, everything was accounted for. I hate to fab pieces when I spend so much $$ so I was happy about that. They sent the chip pretty fast. I saved the cal in my editor program and compared it to stock, contrary to what I've read about the bin being basically stock, there were quite a few changes in all fueling/timing areas. My fuel trims were int 129 blm 128 right out of the box and no knock retard. I guess they did a good job.

bowtiedude

I would be curious to know what you fuel mileage is. I have been considering putting it on my truck.

87tpi7749

Sure, I'll post up next week sometime. I want to give the motor a few miles of break-in before I get a mileage check done.

87tpi7749

Well, guess what. The rotten POS $1100.00 MPFI is coming off. I have had it. Long story short, bad fuel mileage 12 at best, rough idle, waaay rich, HC's in the 600-900 range. Yes I have spent a month, 6 days a week 3 datalogs a day, trying to DIY prom this POS. Ran motor on stock tbi ecm with edelbrock chip, ran motor on modded tbi to run in mpfi mode, better driveability but not economy or emmissions, ran motor on 730 ecm, ok but still bad economy and emmissions. Edelbrock had me send injectors out to get cleaned another $130 at a local fuel shop. Then they sent me three, yes three injectors to play hot-potato swapping them around. No help. Edelbrock efi dept said they don't know how to help me, the engineer who handled most of this stuff was no longer there, maybe they could get one of their customers to call and help me. HA! That never happened. Good customer support. I guess at edelbrock the thousand dollar tree grows year round. Not so for me. I spent money on a new emulator to handle my 64mb files and two new datamaster files for the 730 ecu and tbi trans. Oh yea I also bought two more new heads and changed them vortec 062's in case of a head issue. Every ignition part twice all AC Delco, three ecm's. I fabbed an adapter harness to run two ecm's. AHHHH enough!!! Time to stop throwing $$$$ at this POS set-up. I've spent over $2000 by this point to make it run right. Back to tbi. My recommendation, don't waste your money on these.

dimented24x7

iTrader: (2)

My guess is that the edeljunk pico injectors arent very good and that edelbrock doesnt know what their doing (which is obvious as it was still in TBI mode). Would likely be better to retrofit it with standard MPFI injectors instead if possible and keep the PCM in MPFI mode. Once tuned properly, it should work quite well. Should only need one computer.

87tpi7749

Dimented,
LMAO "edeljunk" you are so right. Pico, yea. I say Picosh*t. I know its an injector issue, but I was looking for a way to work around that issue since no other injector will fit that setup without some major mods. Either way I'll be selling it on ebay soon. I swapped back to tbi last night. I'll hold on to my vortecs for a reinstall as tpi whenever I get a vortec base an some extra cash. I will run the modded tbi ecm I have for the trans & motor, it does work nice.
You know I'm just confused how did they get a 50 state c.a.r.b. approval? This thing won't pass a gas station, never mind an ASM Emmissions test.

dimented24x7

iTrader: (2)

I think the ASSumption is that it would use the stock tune and such and still provide the same fueling. Althoug edelbrock doesnt now jack about how the PCMs actually work, or they wouldnt be using those injectors in TBI mode to begin with. The PCM has all the same code as te TPI computers and then some, so it can work with standard fuel injectors.

Fast355

iTrader: (2)

Exactly the PCM runs in MPFI mode on all the old CPI 4.3s, like the one you had in your S10.