Let's "quantify" (hey, I used a big word!!) our interest and experience with Electronic Fuel Injection.

i for one would like to learn some more about using it in our type of applications.
pros and cons

Please expand on your experiences...

In 1998, I built up an 86 K5 Blazer, a 350 with edelbrock heads, mild cam, and a Holley 4bbl TBI System with the commander 950 and closed loop. I had an absolute blast tuning this thing, driveability and performance were excellent.

I can't wait to do it again, the Camaro will get an EFI system within the next year.

Personally, I love the Edelbrock Pro-Flo system. Nothing was more fun to tune, work or play with. Was open loop first, then got an O2 sensor and went closed loop....:D
Pulled off the UPS truck at 1030 and driving around by 1500...went thru disassembly of carb'ed motor and assembly of EFI!! It was awesome.

Holley 950 Commander TBI setup on my 69 ragtop.

LS1/4L60E in my old 35 chevy.

Holley 950 Commander multiport setup on a modified LT1 intake in my 67.

I've installed and tuned FAST, Accel Gen VII, and Big Stuff 3 as far as aftermarket units. I've also tuned and burned proms on a 93 GM system with a TTS system (Vette), Ford EEC-V with SCT Racer Pro software (Lightning), and GM LS-2 GTO with HP Tuners.

The thing I've found from most of these is the tune is the key, they can all do a good job with the proper tune. Some have more bells and whistles than others.

Jody

somehow I neglected the LT1 systems, how bout we lump them in with TPI?

I am thrilled to see this section added, this will save me tons of search time.

At this time I have yet to order a engine, I am a lil concerned about EFI hassles. I really want to go efi , Im thinkin hard about a ramjet system..on the other hand I have been leaning towards the zz4 lately for pure simplicity.

Lack of disposable funds atm are allowing me way to much time to ponder everything i wanna do on this car. But I did finally order my trans..LOL i had no choice since the old one finally bit it.

Please expand on your experiences...



Well, I've been involved with GM EFI systems since 1985. I was fortunate enough to have attended many GM EFI schools while working as a dealership tech.

I've mostly worked with TPI and TBI, but I really like the Street and Performance systems.
:thumbsup:

Hey guys, new to the forum, but not all that new to EFI.

I have had loads of experience with the TPI......(speed density and mass air flow systems) and TBI setups. I am now taking on my first LT-1 system to go in my 69.

It's good to see this topic. I hope that I can supply a few people with some help.

I guess the best way to learn about these compicated systems are to use the trusty search bar. Thats the way I did it when I was learning about the TPI.

Joe

Being in the process of helping a friend convert his SB over to TPI right now, this is a timely forum :D

The parts are getting easier and easier to find, even at the low-cost 'Pick-N-Pull' places :thumbsup:

I have done this swap on my own vehicles, several friends vehicles and even converted my 90's SB Ski-boat to a TPI/LT-1 set-up, with the help of Arizona Speed & Marine to get the ECM and fuel map correct.
I maintain and service all of our modern family fuel injected vehicles and am leaning more and more to converting my '77 P.U. and the '68 to EFI.
With proper service, and diagnostic tools to identify the occational problems, they are a pleasure to own and drive.

Looking forward to input and projects discussed in this forum;
John M.

I've had experience with both FAST XFI and LSX injection. Both are awesome, but the LS gets the winner for simplicity.

I can't wait to do it again, the Camaro will get an EFI system within the next year.

Jim, given your the moderator of the forum, I bet a dollar you can't wait a year. :D

So far, "others" has the #2 spot. For someone interested in buying a system can we narrow that down a little?

I voted other, although technically I didn’t convert anything. But after some trial & error, I had a good running, highly responsive modified 350 Crossfire FI car. :p

Jim, given your the moderator of the forum, I bet a dollar you can't wait a year. :D
We'll see Jeff, but you know me, I'm loath to tear her down in the summer. Plans include an entire new top end, AFR 195 eliminators, hydro roller, & EFI, for next winter. I will start collecting parts soon tho, so we'll see when they really go on!

So far, "others" has the #2 spot. For someone interested in buying a system can we narrow that down a little?

Yes indeed, I only had 10 spots for the poll and filled them, who are all the "others"?

I voted other, although technically I didn’t convert anything. But after some trial & error, I had a good running, highly responsive modified 350 Crossfire FI car. :p

I dunno Scott, wouldn't that be a "GM Factory TBI"?

I don't see an 84 in your list of cars, did you retrofit that to something else?

My "other" was back in 1993, a blown/alky Kawasaki Ninja ZX6D engine with an EFI Technology ECU.

http://www.blown.net/fsae93/blown.jpg

I dunno Scott, wouldn't that be a "GM Factory TBI"?

I don't see an 84 in your list of cars, did you retrofit that to something else?

Nah, since 99.8% of GM techs couldn't fix CFI, I don't count that as GM. :) Really, when people say TBI, CFI usually doesn't come to mind. I think it is really 'other'. And I technically didn't retrofit it, I modded it, but for the most part, I did. You have no idea how much work I did. Besides, I wanted to make sure CFI got a shout out. ;)

My 1982 Trans Am. Check my fQuick acct in my sig. 84? You are such a closet Vette guy.

You are such a closet Vette guy.
Embarrassing as it is, I am. Actually I've had more vette's than Camaro's, the shame, the shame.

Accel SuperRam kicks butt

Haven't installed any other than OE. If I were to install a system, I imagine it would be a swapout from OE donor to the recipient.

Don't own a laptop, so can't do any fender tuning, er front seat tuning. I just have a MATCO tool ECM-1 and a DMM.

And yes, it'll be less than a year for JimM's EFI install. I'm placing my bet also......gimme my ticket.....

Other, in my case would be Big stuff 3...there's also Mo-Tec and others.

First I did was in 1990, I did a Enderle/BDS 6-71, 16 injector efi system on my car, not real hi-tech, But I tuned it ok.

Looked sooooo cooool, no fake injector hat there!, when you wacked the throttle, the sound from the air being sucked into the hat was unreal! I do miss it.....

Started out tuning my buddy herbs and ours , we ran open loop for the first year with our holley comander 950 . this year we converted them to use the wide band o2 , boy does that make it better . Both cars just love it , i can't wait to try the blower setup .Now i need to get my good buddy MrDanB into a system hopefully before our triup to cali .
Mark.

Started out tuning my buddy herbs and ours , we ran open loop for the first year with our holley comander 950 .

You ran open loop for a year? Did that take some tuning or what? You'd have to be dead on in the fuel map I would suppose as you don't get that +/- factor that the O2 sensor gives you.

You shoulda seen em in Billings last year. He had his wife on the laptop full time adjusting the fuel maps on the fly!!!

We found that his cam would NOT idle in closed loop with the narrow band o2, and the efi setup was not pulling it out of closed loop once it entered it.

Really, wouldn't idle in closed loop huh???

Ain't EFI fun?!?! :D


P.S. I've trained my oldest daughter to tune the fuel map while I drive around, LOL. My wife won't be my helper, but my daughters have no choice!! ;)

Jim now with the wide band what a difference , the pipes have cleaned up and it goes way better . Have you decided on a kit yet . I hope we can get dans done for cali, just in gas savings should help pay for it .
Mark.

i`m looking to do a tpi in my 79...i got most of the components from a wrecked gta 5.0, but am still looking for (cheap...lol...) injectors, and a harness...i figure i can build the harness if i have to, but the inj`s are stalling me...along with all the harley stuff i just have to have also...lmao...most of my experience in efi is diagnostic on stock stuff, but i`m loving the new thread...i`m a sucker for knowledge, and the great stumpers that fuel injection can and will offer...

Jim now with the wide band what a difference , the pipes have cleaned up and it goes way better . Have you decided on a kit yet . I hope we can get dans done for cali, just in gas savings should help pay for it .
Mark.
I'm gonna go Holley again, that's where my experience (such as it is) is. Still undecided tho...

I kinda like the 4 bbl TBI's, they run good, and $1300 plus the wideband kit ain't bad. Then on the other hand, an MPFI like yours would be nice, but double the bucks. I'm also looking at AFR heads and a hydro roller, plus I'm gonna hafta do some work on my TKO. It's only May, and next wsinter's budget is shot all ready. But heck, we're having a killer year, so it may work out.

Let me know when you want to get one i may be able to save you some bucks .
Mark.

I'm gonna go Holley again, that's where my experience (such as it is) is. Still undecided tho...

I kinda like the 4 bbl TBI's, they run good, and $1300 plus the wideband kit ain't bad. Then on the other hand, an MPFI like yours would be nice, but double the bucks. I'm also looking at AFR heads and a hydro roller, plus I'm gonna hafta do some work on my TKO. It's only May, and next wsinter's budget is shot all ready. But heck, we're having a killer year, so it may work out.

I still have the Holley 900 CFM TBI, computer, wiring and all the junk they give you with the kit like fuel pump, connectors, etc that I ran in my 69 ragtop. It's boxed up in the shop.....not sure if I'll ever use it again.

I still have the Holley 900 CFM TBI, computer, wiring and all the junk they give you with the kit like fuel pump, connectors, etc that I ran in my 69 ragtop. It's boxed up in the shop.....not sure if I'll ever use it again.

Pail, is it a 4DI system or the one with the knobs? I don't want the one with the knobs, 4DI is same as commander 950, and I think the newer ones can take a wideband. Whatcha want for it? Send me a PM.