I read through the begi installation instructions and it talked exactly about what you are experiencing. I'm only repeating is because I think you bought yours used, it said to make the initial setpoint to 36psi and then you can disconnect the vacuum line and set the pressure to 48 at 0 vacuum. These were just starting points obviously and you may have tried it already, I don't know. As far as what to ask for in the tune if you lower all the AE vs AE pulse cells by .1 or .2 it should do what you want. Whoever does your tune may want to handle it another way though.
The guy I order chips from does a good job with hacked proms for 7730 ecms ( A 3rd gen F body lover ) I told him what my latest combo is, and the issues I am having... He said the problem I have is an easy fix... I'm not sure what values he is changing. Will get the new chip in a couple days
I read through the begi installation instructions and it talked exactly about what you are experiencing. I'm only repeating is because I think you bought yours used, it said to make the initial setpoint to 36psi and then you can disconnect the vacuum line and set the pressure to 48 at 0 vacuum. These were just starting points obviously and you may have tried it already, I don't know. As far as what to ask for in the tune if you lower all the AE vs AE pulse cells by .1 or .2 it should do what you want. Whoever does your tune may want to handle it another way though.
Yea, I tried this... The PSI will not come in fast enough when I open the throttle. It does great after one second.... But you can feel the hesitation that first second. I also tried the large disc type FMU with no avail
The only way I can keep from getting fuel lag is by setting initial fuel pressure to 60psi ...but then I run pig rich all the time when cruising
Yea...Definately glad to have the 7730 for several reasons.... knock sensor, iac compatibility, more support on tuning, availability of ready to go wiring harnesses, etc.
awesome work MaxCubes, VERY VERY impressed my your ingenuity here.
have you thought of taking this a step further and eliminating the HEI distributor? a board member on here, Robert Cope, did it to his Allante citation X-11 setup. He built up the motor( cam, P&P heads & intake, N* pistons, roller rockers, etc..) and used a 95 corvette ECM, added the corvette Throttlebody, and converted his HEI distributor to Optisparc( caddy lower distributor body, upper corvette optsparc body, hybrid ) then he used an aftermarket kit to add 8 coil packs in place of the optisparc coil... i would imagine the corvette ECM is highly tunable for boost, as soooo many have done it before on vettes/camaros, etc..
just a thought for you. Theres a thread on Pennocks about it in the archives
awesome work MaxCubes, VERY VERY impressed my your ingenuity here.
have you thought of taking this a step further and eliminating the HEI distributor? a board member on here, Robert Cope, did it to his Allante citation X-11 setup. He built up the motor( cam, P&P heads & intake, N* pistons, roller rockers, etc..) and used a 95 corvette ECM, added the corvette Throttlebody, and converted his HEI distributor to Optisparc( caddy lower distributor body, upper corvette optsparc body, hybrid ) then he used an aftermarket kit to add 8 coil packs in place of the optisparc coil... i would imagine the corvette ECM is highly tunable for boost, as soooo many have done it before on vettes/camaros, etc..
just a thought for you. Theres a thread on Pennocks about it in the archives
Thanks for the kind words...
Yes, I read that thread a while back, that was a great build
I haven't done much change to my supercharged 4.9 Fiero lately... As it is running very good as a daily driver
I been perty busy lately with Christmas coming up and family and all
... Early next year I plan to do some more work on it
awesome work MaxCubes, VERY VERY impressed my your ingenuity here.
have you thought of taking this a step further and eliminating the HEI distributor? a board member on here, Robert Cope, did it to his Allante citation X-11 setup. He built up the motor( cam, P&P heads & intake, N* pistons, roller rockers, etc..) and used a 95 corvette ECM, added the corvette Throttlebody, and converted his HEI distributor to Optisparc( caddy lower distributor body, upper corvette optsparc body, hybrid ) then he used an aftermarket kit to add 8 coil packs in place of the optisparc coil... i would imagine the corvette ECM is highly tunable for boost, as soooo many have done it before on vettes/camaros, etc..
just a thought for you. Theres a thread on Pennocks about it in the archives
I make my *STRONGEST* recommendation for either this:
instead. My dad adapted the LT1 optical pickup to the HEI distributor on the Cadillac 500 engine in his 1990 Suburban. He uses a combo of LT1 Edit and TunerCat $EE definition file to tune it. However, the LT1 is old tech and the market has passed the OBDI controls by. Your car will be MUCH easier to tune (especially having it tuned at a dyno shop) if you use an LS1 based controller.
[This message has been edited by Will (edited 12-16-2013).]
I dont come on this site much anymore, but was browsing and found your thread. I just read all 7 pages and I am impressed. Great work and ingenuity! Im glad to see someone still has imagination and vision to do things different.
Great work on your car. You seem to have it mostly figured out. I hope you have many more years of enjoyment.
I dont come on this site much anymore, but was browsing and found your thread. I just read all 7 pages and I am impressed. Great work and ingenuity! Im glad to see someone still has imagination and vision to do things different.
Great work on your car. You seem to have it mostly figured out. I hope you have many more years of enjoyment.
Thanks!
yea the beast is still going strong... I drive it pretty mellow most of the time, I know something will bust eventually if I drive it hard too often But when I do floor it, its a great feeling... I never been in a faster car
Seems to be better suited in the colder weather. In the dead heat of last summer, after fully warmed up, the engine wouldn't feel as powerful, and the heated clutch would also slip excessively sometimes.
instead. My dad adapted the LT1 optical pickup to the HEI distributor on the Cadillac 500 engine in his 1990 Suburban. He uses a combo of LT1 Edit and TunerCat $EE definition file to tune it. However, the LT1 is old tech and the market has passed the OBDI controls by. Your car will be MUCH easier to tune (especially having it tuned at a dyno shop) if you use an LS1 based controller.
potato/potatoe, whatever grooves with the moves...
Will, does the LS1 PCM have the ability to correctly control the Caddy 4T60e tranny?
For example, my dad's truck has a 4L80E (run from the LT1 computer via an external solid state inverter on one of the shift solenoids) and a 14 bolt floating axle with 3.23 gears. It has LONG legs on the highway, but tends to be a gear lower at most times than most applications... and spends more time in 2nd gear around town. The $EE mask from TunerCat claims to have 2nd gear converter lockup parameters mapped, but they don't work. LT1Edit doesn't even map those parameters.
I'm not sure about the 4T60E in particular... What are the differences shift solenoid pattern, converter lockup, pressure regulator solenoid signals?
it tells alot, but far from everything. IIRC it doesn't really hit on programming all that much at all, mainly just gen1/2 smallblock conversions. good read, but far from the word of god.
------------------ we're in desperate need of a little more religion to nurse your god-like point of view...
potato/potatoe, whatever grooves with the moves...
Will, does the LS1 PCM have the ability to correctly control the Caddy 4T60e tranny?
With an LS1 PCM I would also be concerned with the ISC control.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
[This message has been edited by Dennis LaGrua (edited 08-18-2014).]
That engine swap is an outstanding achievement as was the beautiful gauge console . I was skeptical when I first heard of this project but you proved that you had the talent to do it. That required some very close and extensive machining to get it right. I am in the midst of doing that swap on one of my Fieros now and some of the bad press that I read about that engine had me a bit concerned. Welcome news on the 4.9L holding up and running well. My guess for the M90 on this engine was 4 psi of boost. Was that close? Do you plan a 1/4 mile run?
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
That engine swap is an outstanding achievement as was the beautiful gauge console . I was skeptical when I first heard of this project but you proved that you had the talent to do it. That required some very close and extensive machining to get it right. I am in the midst of doing that swap on one of my Fieros now and some of the bad press that I read about that engine had me a bit concerned. Welcome news on the 4.9L holding up and running well. My guess for the M90 on this engine was 4 psi of boost. Was that close? Do you plan a 1/4 mile run?
Thanks,
Yes it took a lot of thinking, work and test fitting to create the plenum for the supercharger.
I am running about 7psi at 5500 rpm with a 3 inch pulley...it was about 5 psi with the stock 3.8 inch pulley
It does high 12's when the engine is still cool... and low to mid 13's if its hot This is with street tires and at 4000 feet elevation
I love this thread!! I have a buddy I work with who recently bought a 95 deville and he said after income tax hes gonna buy a newer car and sell the caddy to me cheap to swap in my 86 gt. From what I have seen the 4.9 swap is one of the easier ones to do as far as v8s go. I know they are kinda weak stock but a m90 on one sounds like it would boost the power a good bit. To get 12s gotta be getting some decent hp MAX. Any clue what this thing is making yet? Any chance you could do an update on all the parts you used to put this thing together bro? I have been inspired by your genious creation.
This thread has made me want to try this and build a 4.9 with a m90 for my fiero. When I first came across it all the pics were present but now just show as little black boxes with an X in the middle where the pics used to be. Anybody know why the pics are not showing anymore?
Anybody know why the pics are not showing anymore?
Because they're gone.
This thread is a "good" example of an unfortunate occurrence that happens here all the time when people use a method other than PIP to post images. They use a hosting site where for whatever reason, the images or the site itself disappears. We are then left to forever stare at red X's where helpful and informative images used to reside.
In some threads it makes no difference as no one cares about the thread a week after it's been posted. However, with interesting threads such as this one, it's a real shame.
[This message has been edited by Patrick (edited 12-15-2014).]
