I'm running an almost 20 year old Holley 4Di with ignition control. A vast improvement over the highly modified and tuned Quadrajet. I am on the Holley pre-order list for the new Sharpshooter coming out. I'm looking forward to self learning, ignition control, and wide band O2 sensor, for only $1000.

 

Beejay - No need to wait to accomplish that for the price point (depending on your power level).

Go Street - $795
Go EFI 4 - $995
Meanstreet - $1095
Go EFI 4 PA - $1195
Go EFI 8 PA - $1495

 

i went with the FAST EZ system (not EZ2), and I love it.

Pros: Lots of tech support, pretty easy to install and program (on the fly too), excellent throttle response and much better mileage than my 600 Holley carb.

Con: Sensitive to ignition timing (which affects vacuum which affects fuel pressure which affects idle down from running.

 

Can you give details on that CAI you have?

 

Of course. It's basically a C5 after market CAI with a radiator mount modification across the top using standard weldable angle iron from your local hardware store or building supplies store. IMO, the modification is stronger than the original radiator mount.

I used a Vararam bridge after I bought a stock bridge off eBay. (I have a stock C5 bridge available if you decide to go this route.) The rest is built from Spectre parts and 4" silicone parts from eBay. You can use any after market C5 air filter resting on the lower radiator mount.

 

BTW, the silicone tube in front of the radiator contains an ovalized band to prevent hose collapse under high airflow conditions. It also makes the duct fit between the hood and radiator when the hood is open.

 

No ac Condenser correct?

 

EZ EFI 2.0... going to go to EZ XFI... same throttle body, just different computer and way to program, has a few more settings, and a speed input as well..

cons.. VERY susceptible to EMI, especially with water near any of the plug wires

pros... INSTANT throttle response, 650hp 427 engine 1200 cfm with 8 injectors. also fully controls timing and fans..

 

Correct, no AC condenser or AC anything. I live in Minnesota, where we measure the AC season in days. I have an AC Delete kit instead.

 

The Holley "Sniper"; not "Sharpshooter" for anyone trying to search the Googles.

Adam

 

I'm installing an AEM Infinity in a turbo LS1 setup.

Upside... 8 direct injectors. 8 direct GM coils, throttle by wire, blending of multiple maps for Gasoline and E85, E85 sensor support, some canbus support, internal and external logging, built in wideband and, got a smoking deal on a new unit. lots of extra inputs and outputs, all programmable, small, waterproof, huge amount of flexibility (maybe too much).

Downside I've seen so far... not as many GM users, would like to see better support. No auto tuning. No built in transmission control. I wouldn't suggest it for newbs, but it's got all the bells and whistles.

I've had good results with previous generations of AEM controllers, we'll see how this one works out.

 

I have since learned that Accel Gen 7 was bought out by MSD and then they were bought out by Holley. Since Holley probably didn't want to own two EFI systems the Gen 7 has come to an end. It made a long run from 1999 or so till 2015. Longer if you count the Gen 6. I understand that Holley is not supporting the Gen 7 however there is a former employee that will service the ECM. I'm not sure what has happened to all the other Accel Parts.

 

I guess I was busy doing other things when this thread was new.

Megasquirt 2 here

Plus-
$278, does all I want with about $50 worth of accessories added internally like 4 ignition drivers for wasted spark coil packs (from dodge NEON), and 3 transisters for PWM idle air (ford style), fan control, and idiot light (high temp, low voltage, low oil pressure, and shift light).

Blended alphaN/SD fuel map works great with 8 stack for excellent manners at idle and light cruise, and AlphaN for ***** out full throttle through the full RPM range.

With blue tooth dongle, can datalog from smart phone, then tune from logs on desktop, or tune live with laptop. I haven't done it yet, but I've heard the blue tooth like to laptop or better yet, surface or tblet, is the way to go. No USB - RS232 wire dangling about in the car when you're lifting front tires.

Total and complete flexibility. Very easy to update firmware as available (free) and everything is well documented.

Minus-
Case is not weatherproof. Not an issue for me because I like the ECM in the cockpit for easier live tuning.

You need mad soldering skills. No, your 100W 1960's soldering gun would be a massive fail.

D25 connector. By the time you solder 25 20ga wires to it, it's at the limit for physical strength of the connector, and the 2 tiny 4-40 screws can be a PITA to get on and off. And it's not weathertight.

Getting crank trigger sensitivity and zero crossing adjustments dialed in can be a PITA too.

Bit of a learning curve as with all EFI custom systems. This one also gives you latitude to get into all sorts of trouble because you can use whatever you want for any sensor, injector or ignition set up.

I'm also running MS2 on my Cobra, and turbo-ed duratec V6 mid engine Ferrari Dino replica.

 

FAST XFI 2.0

Pros:
- What my manifold builder recommended so came all set up for install.
- Fairly easy to tune once I knew what I was doing.

Cons:
- Only 1 O2 sensor input.
- Dual sync distributor finicky.
- Easy to tune to a basic 80% level. Hard to tune to get the final 20%. Had to find a tuner with the knowledge and a dyno but they did a great job (Maryland Performance in Frederick MD).
- Finding a computer and USB/serial adapter that would work. FAST needs to update the XFI to be USB compatible like the Holley.

 

That looks really nice and almost factory other than there not being fuel rails back in the mid 70's

 

The pricey bit is the intake manifold and the 8 stacks. Which combo are you using?

 

I caught this

http://www.ebay.com/itm/SBC-Satin-Aluminum-EFI-Fuel-Injection-Hilborn-Style-Down-Draft-Intake-Kit-Chevy-/302134658094?hash=item4658a1042e
on sale for $1000 a little over a year ago. I did a little re-engineering on it, swapping the TBs so the rails were on the inside, and adding 2 plenums in the valley on the underside, but works great.

All things considered, an Edelbrock EFI Victor intake, fuel rails and throttle body would almost cost as much.

 

I'm running the Fitech 600hp power adder. I'm using it to control timing as well, and it runs really well so far (and yes, I'm using the Fuel Command Centre). Fuel consumption so far seems reasonably high, but hard to say as I've only done about 150 miles since getting all my other issues sorted. It's on a brand new engine, so I don't have a direct comparison, but it makes my pretty serious 388 small block (11:1 compression, 238/242@.050, .558 lift) run sweet down low even when cold, fires right off the key like a new car, idles very well, etc. It drives very well, like a milder engine down low but rips when you get into it. Very impressed so far. Controlling timing via a locked out MSD pro billet and an older 6al box. I have not had any issues related to the Fitech at all. Well, except that while wiring everything up I dropped the controller with the harness connected and broke the pin on one of the plugs. Soldered a replacement plug to an extended harness, no further dramas. I like that it looks like a carbed engine under the hood. Photo before I tidied up some of the wires and hoses:



Edit: Forgot to mention, I'm controlling my thermo fan with it too. Works perfect.

 

I'm a gen 7 owner too (bought with a Hilborn 8 stack setup modified for Bosch injectors), I'm trying to get a Pro Key and can't find a vendor.

Looks like I'm out of luck, do you have contact info for the ECM service guy?

 

I have 2 both are FAST. 1 is XFI 2.0 on a blown 540 with 16 injectors. It made 1530hp on the dyno. I run the FAST ignition too. The second one is XFI sportsman. It's on a 350 Pontiac, again running the FAST ignition. After a little learning and playing with them I love both of them.
The 540 is in a 69 Corvette and will start right up and idle with temps in the 30's. Zero problems. The Pontiac is a 69 Firebird....it's my wife's car, so I wanted something that she could drive and I didn't have to worry about it and she could enjoy. Again zero problems. This car get's 16mpg and runs great.

I bought everything from them so I knew it would all work together. Timing is easily controlled, fans come on when they are supposed to, and engine idles up when the A/C is activated.

Cons: should've done it sooner.

Glen