Inliners International Forums General Discussion Hi Performance EFI Turbo 292

I know I stated in my other thread I didn't want to do EFI, well I changed my mind. I was thinking about how Im going to boost it, and that with a carb it would only be tuned right at a certain psi, and it wouldn't even be turned very good. So now I decided I want to attempt a fuel injection. I know Tom runs the holley commander 950 controller that he rewired and everything else. And I see that others run a megasquirt.

I think I rather use the holley unit, because it seems to be more complete.

I can make the throttle body adapter to run a newer GM style throttle body to a 4 barrel intake. What about the fuel injectors? I assume the manifold has to be milled out to accept fuel injector bungs, but I have no clue about this part.

so Anyways...question time.

1. The commander seems to have 4 injectors that bleed fuel at all times, how does this get seperated out to run 6 injectors?

2. What kind of fuel line is used ontop the injectors? Toms looks like an OEM piece...

3. The commander kit comes with a crank sensor of somesort I guess, right? And an oxygen sensor? I tried reading up on the kit, cant find much though..

4. Do I buy the whole commander kit? Or just what I need since I wont use everything?

Im sure i'll think of more as new info arises, as always I thank anyone who can help, thanks guys, this place rocks!

cajun, here are some answers. #1 with the holley system, each driver can fire two injectors, like with v8's. they also do not fire continuously but in spurts the computer controls, using your setings. i only used all four drivers. driver 1 fires 2, driver 2 fire 2, driver 3 fires 1, and driver 4 fires 1. #2 i got a generic fuel rail and had it machined to fit my injectors. the manifold was also machined to accept the injector bungs. #3 the kit comes with no crank sensor. it will hookup and read from a stock HEI or as i used a computer controlled HEI, 81 california chevy pickup with 250 and spark control thru orielly auto parts. you have to also provide the O2 sensor. it can use a wideband or narrow band O2. #4 i would recommend the generic kit. it comes with 20' of wire and all the connectors needed to make a custom harness. my machinist has a jig made to hold a intake at a 45 degree angle while milling. he will dio this for others if needed. same with the fuel rail. keep on asking i'll help as much as i can. tom

how much did it cost for the fuel rail and intake manifold?

on your HEI, does the holley system control any part of it? If not, why doesnt it?

As I understand it, once I get the engine tuned, I can run almost any boost, as long as my injectors and fuel pressure can handle it, with that one tune? I'd like to run about 10psi on the street, and be able to up to 16-18 for fun. But I dont want to have to retune it everytime...

Also, is it worth the $700 for the wide band o2 part that plugs in with the holley kit? or can a handheld wideband be somehow used? How did you do yours Tom?

the holley C950 controls all my timing. there are much cheaper narrow band O2's and also reasonable widebands. like around 200.00 for a wide band setup. it just takes some learning on what is out there, in the market place. on your other question, if you have the fuel and timing under control , then you can run the boost where you want within reason. the head gasket is the weaklink. i don't know the failure point yet. tom

Alright, cool. Lets say theres 3 banks of two injectors, front, middle and back. In which way are your injectors wired, I understand some of your wires fire two, and some fire one. But if you could explain it would help much.

About the spark control, whats the benifit of this over just a regular HEI?

And I think this is my last questions for now. I have a machine shop around here my Dad likes to use, I will give them a shout to see if they can do the fuel rail and intake.

http://i87.photobucket.com/albums/k148/itsjustasix/Img_1002.jpg
Testing a picture ,clifford intake w/injector bungs

me want me want

I bought the bungs from RPM http://www.raceprovenmotors.com/cart/product_info.php?cPath=44_76&products_id=175
He also has the fuel rail like in my pic.
His name is Mike , tell him hank173 sent you.
Here is an throttle body adaptor, sorta like Toms http://www.raceprovenmotors.com/cart/pro...e8b7ea633a31cc8

are the bungs glued in? Hank, yours looks welded, but Tom's doesn't.

since the manifold and bungs are aluminum, can they be brazed in or something? I realized they probably cant be welded since the manifold is cast...

Cast, billet, you can weld to it.

you welded your right?

Yes, mine is welded.
The Clifford set-up is for me to get used to tunning my SDS EFI system. It will be going on my engine in my car now until I build my new engine, new custom intake & custom turbo header manifold.

what efi are you going to run?

has anyone thought about attmepting to modify a unit from a jeep to work?

Here is the website. http://www.sdsefi.com/
Stock ecm/computers are a pain to tune.
The LS1 /GM aftermarket, software is getting better(more user friendly)
Older ECM's are a pain to tune ,takes a lot of your time to tune.
The SDS system does not need a laptop.
Clifford now sells EFI high performance versions.

Just to be complete here is the megasquirt web page... if you don't mind a bit of extra wiring then the megasquirt is a lower cost option. Its now possible to buy a megasquirt computer fully assembled and tested - ready to bolt in - just a costs a few $$$ more.

http://msefi.com/

efi-diy ,,,,,,
How much is a complete set-up w/the computer assy, assembled?
What is a rotary muffler??

Hank

Im not sure what I want to do now. It deff not worth the hassel of doing turbo'd with a carb, because I cant play with it, without retuning the carb.

The whole efi thing has my head spinning so far..

I've recently been having thoughts of doing a turbo'd trailblazer straight 6...seems like the same turbo and everything used on a 292 will work just the same on a trailblazer motor, and the TB motor has fuel injection already.

Those engines are very nice & can make a lot of HP!!!!!!!!!!

I realize their 270hp stock...what can be done to increase it?

See if you can contact Glen Self of Self racing.
I believe he made a 1000HP turbo 4.2 engine in a 66 Nova wagon that ran 8.50's & can drive it on the street.
Not his car, but his engine.
http://www.selfracing.com/

efi-diy
,,,,,,,,,,,
Thanks!
so that's just for the control box, how much for the harness's, injector harness etc, for a whole complete package, map sensor, etc??
How much for that set-up? Complete?

okay, I read the whole manual for the commander kit, and I have some questions.

For the map sensor, since I look to run at most 16 psi, I've decided on a 2 bar map, good decision?

When I set it up, I do it for tbi correct? I understand the wiring to the injectors, and I think you can tune it to accept a group fire type deal. My only question is does it fire the front two, middle two, then back two? Like whats the order of firing?

When using a 5.3 chevy TB, is a TPS sensor already in it?

And what about an IAC valve for the a/c? Is it in the TB, or no?

Also Tom, how much would your machinist charge to make my intake with bungs, and fuel rail, if I send him an offy 4 barrel intake?

Thanks guys

I answered some of my own qestions with a quick talk to my Dad, who knows LS1's very well..

if I use a corvette throttle body, about 95mm, the TPS and IAC are mounted with the throttle body. All I need is an early one that is cable pull.

But I still need help with the other questions, thanks.

he would probably charge about 150 for maching the two parts. i also used a 5.3 throttle body, it is nice to have stock oem parts to use. tom

not bad at all.

I think Im am going to run with an older 292. Reason being is I can do it in stages that are affordable to me.

Besides the head, what other stuff has to be done to the rest of the engine besides a full rebuild and pistons? You said something about oil mods before I think...

and about the head, getting it smooth out and the lump ports put in, how much would that cost?

What Im thinking about doing, is getting the 292, and doing all of my engine work minus the cam for the turbo. Then I can save up and do the EFI swap, then I can do the turbo.

Add $300 in parts to complete the system (no injectors in this cost), the MAP sensor is directly on the megasquirt computer - you run a hose to it.

The harness is univeral and needs to be trimed and terminated to suit your installation.