I've been working with these guys on a build. It's essentially this engine with the AFR heads instead.

http://test.shafiroff.com/engines/402_realstreet.php

They do the EZ-EFI system out of their shop, but I'm interested in what else you guys may recommend in the "self tuning" EFI realm? . . . FIRST, HSR, Avenger, etc . . .

 

I downloaded the holley hp efi software from their website and it seems pretty user friendly and a good port efi system. Considering it for my turbo car if i cant easily swap to ls1 style 24x system.

Something like that seems to be best bang for buck port efi self tuning system around. Some mention the accel products but not sure if its self tuning or has that feature. Efiguy can comment to that.

I would avoid the throttle body style injection setups like ez efi kits for carb manifolds. If you want a carb style manifold i would go efi single plane manifold and run a 4bbl style tb or intake elbow and ls1 type tb.

 

Okay, so if I went the Holley HP EFI route (which seems to be well liked give its support to boost, nitrous and meth), I would need the following?

Kit 550-810
http://www.holley.com/550-810.asp

And 8 pack of 36# injectors 522-368
http://www.jegs.com/i/Holley/510/522...oductId=746392

And what fuel pump? I currently have a Walbro 190, but the jury is out on whether or not that can support the power. According to the ones offered by Holley themselves, they say a 190 can support up to 600hp (http://www.jegs.com/p/Holley/Holley-...47665/10002/-1)

Also, what would need to be done with fuel lines . . . and without the EGR provisions, what do I need to rip out/off the car? It just passed emissions (by the skin of its teeth), but it has one more to go before she gets a pass for life.

 

190 should do it but a 255 def will if motor is only 495-550 ish hp. 36's willl work for injectors.

Fuel lines just need to make some from factory body hardlines to the rails. Need the earls fittings from metric to -6 an and braided line/fittings of your choice.

Egr you dont need to do anything with. Intake isnt setup for it. Nothing else in the bay thats related to it. If you need egr better get a different intake

 

So with no EGR, I don't have to block off anything else? Sweet.

So what kind of nitrous system could I run on this? I'm looking for something small like a 50 shot.

 

If single plane efi like that kit buy any carb plate spray kit but need to watch the jet sizes due to fuel pressure differences. So i use jet calculators online to adjust my fuel jets.

I spray about a 75 shot off the line for a second to spool turbos. Bought the nx express hitman plate kit and fuel jets

 

You're close to having me sold on this.

I was leaning towards the EZ-EFI or the Atomic, but came away a little unimpressed with some features of it. Although for the sake of simplicity I would still be interested.

Then I like the idea of the FIRST system, and even though they sell it with the EZ-EFI computer, I would still need to develop all sorts of brackets and such to make it work.

Decisions, decisions . . .

 

There are some ez efi threads here and on chevelles.com forum. Good info. I suppose it would work and give you everything you need. Just seems for the money the extra capability of holley hp makes it worth while down the road.

FIRST tpi could work but will restrict rpm range and some hp potential imo. Its a big tpi but not big enough to properly feed a 400" motor. Can to 5200-5500 i guess but it has too long of runners and not a big enough cross section area. I think a big single plane is a better match for upper rpm hp. First would make more peak torque tho. Tradeoffs.
Miniram also works well for hp but is pricey

 

dynamicefi.com ?

 

I like the megasquirt. You can have it build a target AFR map based on engine specs, and then with the wideband it will autotune your ve tables to that AFR map from idle to WOT.

Will even autotune AE, then if you need to make minor corrections it has almost unlimited features.


-- Joe

 

Thank you.
Are you going to drive the car? Or race it mostly?
if you're going to drive it then I'd say the Accel would be the best choice. If you're going to race it more often then maybe the BS3 or similar.
The Accel has more transient fueling tables that will equate to to better drivability than most. The BS3 has more datalogging capacity etc. and it's internal.
The Accel has a 2 step nitrous table, enter the pill size and bottle pressure and it'll do the fuel curve for you, and it'll be very close.
Accel does not have "self learning" but not all of those work that well. And as mentioned you still need to enter the right parameters, do cold start and a bunch of other stuff. I'd be happy to pass along the addresses of a few guys who recently purchased the "self learning" XFI 2.0 and it didn't run well at all.
When all is said and done the Accel isn't hard to tune, at all. Just make sure whatever you buy has the features you need, not just a lot of bells and whistles.

 

Ur signature says u have EBL ... Why do u need another tuning program/EFI setup ... There guys making 400-500 hp with TBI and EBL.. ???? Confused ... If
U can't tune using ebl u ain't gonna be able to tune using anything else

 

I'm doing a similar project. After looking at various systems I boiled it down to the Accel and the Holley HP systems. The Accel seemed nice but is much more expensive than the HP. I found it hard to find out much about the Accel system online, even their own web-site doesn't have much. The Edelbrock system is quite a good price too, but searches don't show the number of users that the Accel and Holley systems have. That may be just marketing. I can't remember why I ruled out the Atomic, I think it didn't control timing or something like that.

Anyway, the cost and the flexibility to tailor the system to the power range of my engine were the deciding factors I used. You could of course buy all the parts separately but living where I do I wanted a kit with most of what I needed. The Accel Engine Builder is probably the best for that but as I said expensive. For the HP all you need is a pump, properly sized injectors, and if you want to do serial you will need cam synch, either from a dual synch distributor or crank and cam sensors. If you only want batch fire then a computer controlled HEI is OK.

The HP system came out to be about $3700 with everything needed, Accel seemed to $4500 although I did see some people selling it for $3800. They weren't big name companies as far as I can tell so I don't know their reputation.

I did find with a search (I think it was the Chevelle guys site) where a guy had a table of most of the systems out there with pros/cons. You'll find it pretty easily.

Cheers

 

Pm'd you.

 

I'll second that! MegaSquirt 3 Extra and you can tune any engine you would put in your car. As Anesthes said it can tune itself AND you can blutooth it to a tablet for a heads up display.