Weber style EFI [Archive] - Factory Five Forums

Fordguy

07-28-2022, 10:16 AM

I am considering adding a Jim Inglese or Borla injection 8 stack EFI induction to my 408C stroker with a AOD transmission in MK4 Roadster.
I know I will need to match cam specs to EFI system.
Wondering what type of real world experience these set ups provide for street driving?
I'm looking for a system that will provide relatively maintenance free driving once properly tuned.

please share your experiences, good or bad

thanks

Mike.Bray

07-28-2022, 11:22 AM

I've had a few and I'm putting a 351W with a Borla setup in my current build. My experience is with the EFI is it starts, idles, and cruises around like a stocker. Until you step on the loud pedal. Stack EFI not only looks amazing but has tremendous throttle response. If you put a stack EFI system on a 408 stroker in a Cobra you're going to need a good neck brace.

I bought my latest system from Borla as they took over the original TWM designs. The system is very high quality and aftermarket support is good. I've known Jim Ingeles forever and he knows his stuff. Very high quality and Jim will supply you as close to turn key as possible.

One last note, for the ECU use either a Holley Terminator or Fast Sportsman. You don't want an EZ-EFI with these systems even though it's offered by some suppliers.

rich grsc

07-28-2022, 12:37 PM

I have the Borla 8 Stack setup. Mike is correct, get the proper ECU. I have the Fast Sportsman now. DO NOT get the EZ-EFI, it will not work. The vendor that sold me mine didn't have a clue about what to use with this setup. Sold it with the EZ set up, could not get it drivable, then after calling 3 or 4 times asking for help, said he didn't know, I should find someone local. Once it was determined that was the WRONG ECU and I switched to the Sportsman, it was night & day difference. Pulls all the way from idle to the rev-limit like its an electric motor.
170152

nucjd19

07-28-2022, 08:30 PM

rich grsc

07-28-2022, 08:50 PM

Thanks, I appreciate that. Don't think its been that clean since though.

nucjd19

07-28-2022, 08:58 PM

Thanks, I appreciate that. Don't think its been that clean since though.

I am thinking that this might be my next project maybe this winter.

CraigS

07-30-2022, 05:02 PM

Rich that is beautiful. How do you feel about the little air filters on each stack? Do they filter well? Do you need to clean them regularly? Just curious as the look is to die for, and your remark about the electric motor type performance would be in the same category, but will the filters let the engine last?

SJDave

07-30-2022, 07:15 PM

With a little patience and knowledge the Borla system will run perfect on the street or track. Go buy two books on amazon by Greg Banish,, fuel injection engineer at GM. Everything you need to know is explained in simple terms. The Manual that comes with the FAST systems is crap. I had the XFI 2.0, the high end unit, and the manual was almost no help. After reading the 2 Banish books I tore apart the FAST Manual and reorganized everything to be the logical order that Banish proposes....geez, made so much sense after doing this. I think the Sportsman offers the same tuning tools as the XFI 2.0, just doesn't have all the drag racing features and Nitrous and Turbos...but not 100% sure.

I bought the car with 100 miles, it ran so bad the previous owner just wanted to dump it. HUGE sidepipe explosions, cold start problems, poor idle, bucking at low rpm, stinking rich at high rpm. It was a new Smeding Performance 427 long block, it had dyno'd at Smeding with 648 Hp and 618 ftlbs of torque....7,200 redline. BUT...driveability was horrible.

Probably due to my low IQ it took me about a year and 13 tuning revisions to get it dialed in. The Borla maps provided are about 50% of the battle, it's up you to optimize. I am more then happy to Email you the full set of tables and maps I developed if you get the XFI 2.0 system, not sure if they are compatible with the Sportsman, but maybe.

The car drove perfectly around town as a grocery getter but was a monster on Driving School days at the local tracks, no overheating, no detonation, no fouled plugs...it just runs perfect.

And...it looks very cool.!

PS - Borla tech support is worthless, that's the only downside of buying their system, was much better when it was 8 Stack.

hugo-k

05-28-2023, 09:29 AM

Hi. I got the Borla induction, using Fast EZ-EFI. Regarding people mentioned, or having found out that this is a crap EFI; Are any of the proper ECU/EFI systems compatible with the EZ-EFI?

Papa

05-28-2023, 09:42 AM

I bought my stack injection from Jim Inglese. He sells several different options, including, as your post title indicates, a setup that looks identical to non-EFI Webers. I have the Borla stacks from Jim with a Holley Terminator X ECU and Holley Dual Sync distributor with MSD CDI ignition (required for the Dual Sync). I had it professionally tuned by a certified Holley tuner in my area and the car runs great!

https://thefactoryfiveforum.com/attachment.php?attachmentid=168959&d=1656945690

https://www.youtube.com/watch?v=GOY7IQuik_c

rich grsc

05-28-2023, 11:14 AM

Hi. I got the Borla induction, using Fast EZ-EFI. Regarding people mentioned, or having found out that this is a crap EFI; Are any of the proper ECU/EFI systems compatible with the EZ-EFI?

As I said in my post; EZ-EFI is junk, replace it with the EZ-SPORTSMAN. It is a direct swap, unplug the EZ, plug in the SPORTSMAN. Redo the the complete setup procedure and the car will be drivable. It will still need tweaking for best performance, but unlike the EZ, the SPORTSMAN can be easily programmed.
Reach out to FAST, explain what you have and the issues you have, they may offer a discounted swap

Mike.Bray

05-28-2023, 05:21 PM

Everything Rich said^^^

With the Sportsman make sure you turn the self-tuning off with a stack system.

Blue Viking

05-29-2023, 01:04 PM

Papa

05-29-2023, 01:15 PM

Couldn't get it to run properly with the EZ-EFI. Not the best of vacuum with the cam i have. Changed to sportsman, way better. Using Speedmaster stacks and manifold. I'll take Mike's advice and turn off closed loop.

Your cam could be the cause as well. When I was discussing going to stacks with Jim Inglese, he stressed that lumpy cams don't work well with EFI stacks.

From Jim's FAQ:

What kind of a cam should I run?

Any cam is fine as long as you pay attention to the lobe separation angle (LSA). A 112-114 degree lobe separation is ideal for Webers. I generally discourage the use of anything tighter, like 108, or 106. A 110 LSA is marginal. The problem with a lot of overlap is that it causes "reversion"...which are pulses from the exhaust stroke while the intake valve is still open, that have nowhere to go but up into the carburetor. This disturbs high rpm airflow and causes the engine to think it's too lean at high rpm’s. Without a plenum, the flow is pulsed backward up into the carburetors because there is noplace else for the reversion pulse to go. To find your cam's lobe separation angle, check your cam card. Just add the intake centerline and exhaust centerline and divide by 2.

If you have no clue what I'm talking about, that's okay. Here's a diagram of what it looks like, courtesy of Popular Hot Rodding. This should clarify it for you. It's okay if you don't know about this stuff...if that's the case, this is part of your education. Click the link below:

Lobe separation angle explained

EZ$

05-29-2023, 02:46 PM

I know absolutely nothing about what should work and what shouldn't, but I'm running a stack injection from Speedmaster and FAST 2.0 and I'm not experiencing any issues with the setup at this point. For me it runs like a scalded dog when I get on it and is fairly tame when just cruising around town.

bobl

05-29-2023, 03:20 PM

Here's a link to a dyno test I did last year on a Borla system testing various filters.

https://thefactoryfiveforum.com/showthread.php?43379-Recent-engine-build-dyno-results